cms/drupal/modules/simpletest/tests/file.test
changeset 541 e756a8c72c3d
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cms/drupal/modules/simpletest/tests/file.test	Fri Sep 08 12:04:06 2017 +0200
@@ -0,0 +1,2769 @@
+<?php
+
+/**
+ *  @file
+ *  This provides SimpleTests for the core file handling functionality.
+ *  These include FileValidateTest and FileSaveTest.
+ */
+
+/**
+ * Helper validator that returns the $errors parameter.
+ */
+function file_test_validator($file, $errors) {
+  return $errors;
+}
+
+/**
+ * Helper function for testing file_scan_directory().
+ *
+ * Each time the function is called the file is stored in a static variable.
+ * When the function is called with no $filepath parameter, the results are
+ * returned.
+ *
+ * @param $filepath
+ *   File path
+ * @return
+ *   If $filepath is NULL, an array of all previous $filepath parameters
+ */
+function file_test_file_scan_callback($filepath = NULL) {
+  $files = &drupal_static(__FUNCTION__, array());
+  if (isset($filepath)) {
+    $files[] = $filepath;
+  }
+  else {
+    return $files;
+  }
+}
+
+/**
+ * Reset static variables used by file_test_file_scan_callback().
+ */
+function file_test_file_scan_callback_reset() {
+  drupal_static_reset('file_test_file_scan_callback');
+}
+
+/**
+ * Base class for file tests that adds some additional file specific
+ * assertions and helper functions.
+ */
+class FileTestCase extends DrupalWebTestCase {
+  /**
+   * Check that two files have the same values for all fields other than the
+   * timestamp.
+   *
+   * @param $before
+   *   File object to compare.
+   * @param $after
+   *   File object to compare.
+   */
+  function assertFileUnchanged($before, $after) {
+    $this->assertEqual($before->fid, $after->fid, format_string('File id is the same: %file1 == %file2.', array('%file1' => $before->fid, '%file2' => $after->fid)), 'File unchanged');
+    $this->assertEqual($before->uid, $after->uid, format_string('File owner is the same: %file1 == %file2.', array('%file1' => $before->uid, '%file2' => $after->uid)), 'File unchanged');
+    $this->assertEqual($before->filename, $after->filename, format_string('File name is the same: %file1 == %file2.', array('%file1' => $before->filename, '%file2' => $after->filename)), 'File unchanged');
+    $this->assertEqual($before->uri, $after->uri, format_string('File path is the same: %file1 == %file2.', array('%file1' => $before->uri, '%file2' => $after->uri)), 'File unchanged');
+    $this->assertEqual($before->filemime, $after->filemime, format_string('File MIME type is the same: %file1 == %file2.', array('%file1' => $before->filemime, '%file2' => $after->filemime)), 'File unchanged');
+    $this->assertEqual($before->filesize, $after->filesize, format_string('File size is the same: %file1 == %file2.', array('%file1' => $before->filesize, '%file2' => $after->filesize)), 'File unchanged');
+    $this->assertEqual($before->status, $after->status, format_string('File status is the same: %file1 == %file2.', array('%file1' => $before->status, '%file2' => $after->status)), 'File unchanged');
+  }
+
+  /**
+   * Check that two files are not the same by comparing the fid and filepath.
+   *
+   * @param $file1
+   *   File object to compare.
+   * @param $file2
+   *   File object to compare.
+   */
+  function assertDifferentFile($file1, $file2) {
+    $this->assertNotEqual($file1->fid, $file2->fid, format_string('Files have different ids: %file1 != %file2.', array('%file1' => $file1->fid, '%file2' => $file2->fid)), 'Different file');
+    $this->assertNotEqual($file1->uri, $file2->uri, format_string('Files have different paths: %file1 != %file2.', array('%file1' => $file1->uri, '%file2' => $file2->uri)), 'Different file');
+  }
+
+  /**
+   * Check that two files are the same by comparing the fid and filepath.
+   *
+   * @param $file1
+   *   File object to compare.
+   * @param $file2
+   *   File object to compare.
+   */
+  function assertSameFile($file1, $file2) {
+    $this->assertEqual($file1->fid, $file2->fid, format_string('Files have the same ids: %file1 == %file2.', array('%file1' => $file1->fid, '%file2-fid' => $file2->fid)), 'Same file');
+    $this->assertEqual($file1->uri, $file2->uri, format_string('Files have the same path: %file1 == %file2.', array('%file1' => $file1->uri, '%file2' => $file2->uri)), 'Same file');
+  }
+
+  /**
+   * Helper function to test the permissions of a file.
+   *
+   * @param $filepath
+   *   String file path.
+   * @param $expected_mode
+   *   Octal integer like 0664 or 0777.
+   * @param $message
+   *   Optional message.
+   */
+  function assertFilePermissions($filepath, $expected_mode, $message = NULL) {
+    // Clear out PHP's file stat cache to be sure we see the current value.
+    clearstatcache();
+
+    // Mask out all but the last three octets.
+    $actual_mode = fileperms($filepath) & 0777;
+
+    // PHP on Windows has limited support for file permissions. Usually each of
+    // "user", "group" and "other" use one octal digit (3 bits) to represent the
+    // read/write/execute bits. On Windows, chmod() ignores the "group" and
+    // "other" bits, and fileperms() returns the "user" bits in all three
+    // positions. $expected_mode is updated to reflect this.
+    if (substr(PHP_OS, 0, 3) == 'WIN') {
+      // Reset the "group" and "other" bits.
+      $expected_mode = $expected_mode & 0700;
+      // Shift the "user" bits to the "group" and "other" positions also.
+      $expected_mode = $expected_mode | $expected_mode >> 3 | $expected_mode >> 6;
+    }
+
+    if (!isset($message)) {
+      $message = t('Expected file permission to be %expected, actually were %actual.', array('%actual' => decoct($actual_mode), '%expected' => decoct($expected_mode)));
+    }
+    $this->assertEqual($actual_mode, $expected_mode, $message);
+  }
+
+  /**
+   * Helper function to test the permissions of a directory.
+   *
+   * @param $directory
+   *   String directory path.
+   * @param $expected_mode
+   *   Octal integer like 0664 or 0777.
+   * @param $message
+   *   Optional message.
+   */
+  function assertDirectoryPermissions($directory, $expected_mode, $message = NULL) {
+    // Clear out PHP's file stat cache to be sure we see the current value.
+    clearstatcache();
+
+    // Mask out all but the last three octets.
+    $actual_mode = fileperms($directory) & 0777;
+
+    // PHP on Windows has limited support for file permissions. Usually each of
+    // "user", "group" and "other" use one octal digit (3 bits) to represent the
+    // read/write/execute bits. On Windows, chmod() ignores the "group" and
+    // "other" bits, and fileperms() returns the "user" bits in all three
+    // positions. $expected_mode is updated to reflect this.
+    if (substr(PHP_OS, 0, 3) == 'WIN') {
+      // Reset the "group" and "other" bits.
+      $expected_mode = $expected_mode & 0700;
+      // Shift the "user" bits to the "group" and "other" positions also.
+      $expected_mode = $expected_mode | $expected_mode >> 3 | $expected_mode >> 6;
+    }
+
+    if (!isset($message)) {
+      $message = t('Expected directory permission to be %expected, actually were %actual.', array('%actual' => decoct($actual_mode), '%expected' => decoct($expected_mode)));
+    }
+    $this->assertEqual($actual_mode, $expected_mode, $message);
+  }
+
+  /**
+   * Create a directory and assert it exists.
+   *
+   * @param $path
+   *   Optional string with a directory path. If none is provided, a random
+   *   name in the site's files directory will be used.
+   * @return
+   *   The path to the directory.
+   */
+  function createDirectory($path = NULL) {
+    // A directory to operate on.
+    if (!isset($path)) {
+      $path = file_default_scheme() . '://' . $this->randomName();
+    }
+    $this->assertTrue(drupal_mkdir($path) && is_dir($path), 'Directory was created successfully.');
+    return $path;
+  }
+
+  /**
+   * Create a file and save it to the files table and assert that it occurs
+   * correctly.
+   *
+   * @param $filepath
+   *   Optional string specifying the file path. If none is provided then a
+   *   randomly named file will be created in the site's files directory.
+   * @param $contents
+   *   Optional contents to save into the file. If a NULL value is provided an
+   *   arbitrary string will be used.
+   * @param $scheme
+   *   Optional string indicating the stream scheme to use. Drupal core includes
+   *   public, private, and temporary. The public wrapper is the default.
+   * @return
+   *   File object.
+   */
+  function createFile($filepath = NULL, $contents = NULL, $scheme = NULL) {
+    if (!isset($filepath)) {
+      // Prefix with non-latin characters to ensure that all file-related
+      // tests work with international filenames.
+      $filepath = 'Файл для тестирования ' . $this->randomName();
+    }
+    if (!isset($scheme)) {
+      $scheme = file_default_scheme();
+    }
+    $filepath = $scheme . '://' . $filepath;
+
+    if (!isset($contents)) {
+      $contents = "file_put_contents() doesn't seem to appreciate empty strings so let's put in some data.";
+    }
+
+    file_put_contents($filepath, $contents);
+    $this->assertTrue(is_file($filepath), 'The test file exists on the disk.', 'Create test file');
+
+    $file = new stdClass();
+    $file->uri = $filepath;
+    $file->filename = drupal_basename($file->uri);
+    $file->filemime = 'text/plain';
+    $file->uid = 1;
+    $file->timestamp = REQUEST_TIME;
+    $file->filesize = filesize($file->uri);
+    $file->status = 0;
+    // Write the record directly rather than calling file_save() so we don't
+    // invoke the hooks.
+    $this->assertNotIdentical(drupal_write_record('file_managed', $file), FALSE, 'The file was added to the database.', 'Create test file');
+
+    return $file;
+  }
+}
+
+/**
+ * Base class for file tests that use the file_test module to test uploads and
+ * hooks.
+ */
+class FileHookTestCase extends FileTestCase {
+  function setUp() {
+    // Install file_test module
+    parent::setUp('file_test');
+    // Clear out any hook calls.
+    file_test_reset();
+  }
+
+  /**
+   * Assert that all of the specified hook_file_* hooks were called once, other
+   * values result in failure.
+   *
+   * @param $expected
+   *   Array with string containing with the hook name, e.g. 'load', 'save',
+   *   'insert', etc.
+   */
+  function assertFileHooksCalled($expected) {
+    // Determine which hooks were called.
+    $actual = array_keys(array_filter(file_test_get_all_calls()));
+
+    // Determine if there were any expected that were not called.
+    $uncalled = array_diff($expected, $actual);
+    if (count($uncalled)) {
+      $this->assertTrue(FALSE, format_string('Expected hooks %expected to be called but %uncalled was not called.', array('%expected' => implode(', ', $expected), '%uncalled' => implode(', ', $uncalled))));
+    }
+    else {
+      $this->assertTrue(TRUE, format_string('All the expected hooks were called: %expected', array('%expected' => empty($expected) ? t('(none)') : implode(', ', $expected))));
+    }
+
+    // Determine if there were any unexpected calls.
+    $unexpected = array_diff($actual, $expected);
+    if (count($unexpected)) {
+      $this->assertTrue(FALSE, format_string('Unexpected hooks were called: %unexpected.', array('%unexpected' => empty($unexpected) ? t('(none)') : implode(', ', $unexpected))));
+    }
+    else {
+      $this->assertTrue(TRUE, 'No unexpected hooks were called.');
+    }
+  }
+
+  /**
+   * Assert that a hook_file_* hook was called a certain number of times.
+   *
+   * @param $hook
+   *   String with the hook name, e.g. 'load', 'save', 'insert', etc.
+   * @param $expected_count
+   *   Optional integer count.
+   * @param $message
+   *   Optional translated string message.
+   */
+  function assertFileHookCalled($hook, $expected_count = 1, $message = NULL) {
+    $actual_count = count(file_test_get_calls($hook));
+
+    if (!isset($message)) {
+      if ($actual_count == $expected_count) {
+        $message = format_string('hook_file_@name was called correctly.', array('@name' => $hook));
+      }
+      elseif ($expected_count == 0) {
+        $message = format_plural($actual_count, 'hook_file_@name was not expected to be called but was actually called once.', 'hook_file_@name was not expected to be called but was actually called @count times.', array('@name' => $hook, '@count' => $actual_count));
+      }
+      else {
+        $message = format_string('hook_file_@name was expected to be called %expected times but was called %actual times.', array('@name' => $hook, '%expected' => $expected_count, '%actual' => $actual_count));
+      }
+    }
+    $this->assertEqual($actual_count, $expected_count, $message);
+  }
+}
+
+
+/**
+ *  This will run tests against the file_space_used() function.
+ */
+class FileSpaceUsedTest extends FileTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'File space used tests',
+      'description' => 'Tests the file_space_used() function.',
+      'group' => 'File API',
+    );
+  }
+
+  function setUp() {
+    parent::setUp();
+
+    // Create records for a couple of users with different sizes.
+    $file = array('uid' => 2, 'uri' => 'public://example1.txt', 'filesize' => 50, 'status' => FILE_STATUS_PERMANENT);
+    drupal_write_record('file_managed', $file);
+    $file = array('uid' => 2, 'uri' => 'public://example2.txt', 'filesize' => 20, 'status' => FILE_STATUS_PERMANENT);
+    drupal_write_record('file_managed', $file);
+    $file = array('uid' => 3, 'uri' => 'public://example3.txt', 'filesize' => 100, 'status' => FILE_STATUS_PERMANENT);
+    drupal_write_record('file_managed', $file);
+    $file = array('uid' => 3, 'uri' => 'public://example4.txt', 'filesize' => 200, 'status' => FILE_STATUS_PERMANENT);
+    drupal_write_record('file_managed', $file);
+
+    // Now create some non-permanent files.
+    $file = array('uid' => 2, 'uri' => 'public://example5.txt', 'filesize' => 1, 'status' => 0);
+    drupal_write_record('file_managed', $file);
+    $file = array('uid' => 3, 'uri' => 'public://example6.txt', 'filesize' => 3, 'status' => 0);
+    drupal_write_record('file_managed', $file);
+  }
+
+  /**
+   * Test different users with the default status.
+   */
+  function testFileSpaceUsed() {
+    // Test different users with default status.
+    $this->assertEqual(file_space_used(2), 70);
+    $this->assertEqual(file_space_used(3), 300);
+    $this->assertEqual(file_space_used(), 370);
+
+    // Test the status fields
+    $this->assertEqual(file_space_used(NULL, 0), 4);
+    $this->assertEqual(file_space_used(NULL, FILE_STATUS_PERMANENT), 370);
+
+    // Test both the user and status.
+    $this->assertEqual(file_space_used(1, 0), 0);
+    $this->assertEqual(file_space_used(1, FILE_STATUS_PERMANENT), 0);
+    $this->assertEqual(file_space_used(2, 0), 1);
+    $this->assertEqual(file_space_used(2, FILE_STATUS_PERMANENT), 70);
+    $this->assertEqual(file_space_used(3, 0), 3);
+    $this->assertEqual(file_space_used(3, FILE_STATUS_PERMANENT), 300);
+  }
+}
+
+/**
+ *  This will run tests against the file validation functions (file_validate_*).
+ */
+class FileValidatorTest extends DrupalWebTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'File validator tests',
+      'description' => 'Tests the functions used to validate uploaded files.',
+      'group' => 'File API',
+    );
+  }
+
+  function setUp() {
+    parent::setUp();
+
+    $this->image = new stdClass();
+    $this->image->uri = 'misc/druplicon.png';
+    $this->image->filename = drupal_basename($this->image->uri);
+
+    $this->non_image = new stdClass();
+    $this->non_image->uri = 'misc/jquery.js';
+    $this->non_image->filename = drupal_basename($this->non_image->uri);
+  }
+
+  /**
+   * Test the file_validate_extensions() function.
+   */
+  function testFileValidateExtensions() {
+    $file = new stdClass();
+    $file->filename = 'asdf.txt';
+    $errors = file_validate_extensions($file, 'asdf txt pork');
+    $this->assertEqual(count($errors), 0, 'Valid extension accepted.', 'File');
+
+    $file->filename = 'asdf.txt';
+    $errors = file_validate_extensions($file, 'exe png');
+    $this->assertEqual(count($errors), 1, 'Invalid extension blocked.', 'File');
+  }
+
+  /**
+   *  This ensures a specific file is actually an image.
+   */
+  function testFileValidateIsImage() {
+    $this->assertTrue(file_exists($this->image->uri), 'The image being tested exists.', 'File');
+    $errors = file_validate_is_image($this->image);
+    $this->assertEqual(count($errors), 0, 'No error reported for our image file.', 'File');
+
+    $this->assertTrue(file_exists($this->non_image->uri), 'The non-image being tested exists.', 'File');
+    $errors = file_validate_is_image($this->non_image);
+    $this->assertEqual(count($errors), 1, 'An error reported for our non-image file.', 'File');
+  }
+
+  /**
+   *  This ensures the resolution of a specific file is within bounds.
+   *  The image will be resized if it's too large.
+   */
+  function testFileValidateImageResolution() {
+    // Non-images.
+    $errors = file_validate_image_resolution($this->non_image);
+    $this->assertEqual(count($errors), 0, 'Should not get any errors for a non-image file.', 'File');
+    $errors = file_validate_image_resolution($this->non_image, '50x50', '100x100');
+    $this->assertEqual(count($errors), 0, 'Do not check the resolution on non files.', 'File');
+
+    // Minimum size.
+    $errors = file_validate_image_resolution($this->image);
+    $this->assertEqual(count($errors), 0, 'No errors for an image when there is no minimum or maximum resolution.', 'File');
+    $errors = file_validate_image_resolution($this->image, 0, '200x1');
+    $this->assertEqual(count($errors), 1, 'Got an error for an image that was not wide enough.', 'File');
+    $errors = file_validate_image_resolution($this->image, 0, '1x200');
+    $this->assertEqual(count($errors), 1, 'Got an error for an image that was not tall enough.', 'File');
+    $errors = file_validate_image_resolution($this->image, 0, '200x200');
+    $this->assertEqual(count($errors), 1, 'Small images report an error.', 'File');
+
+    // Maximum size.
+    if (image_get_toolkit()) {
+      // Copy the image so that the original doesn't get resized.
+      copy('misc/druplicon.png', 'temporary://druplicon.png');
+      $this->image->uri = 'temporary://druplicon.png';
+
+      $errors = file_validate_image_resolution($this->image, '10x5');
+      $this->assertEqual(count($errors), 0, 'No errors should be reported when an oversized image can be scaled down.', 'File');
+
+      $info = image_get_info($this->image->uri);
+      $this->assertTrue($info['width'] <= 10, 'Image scaled to correct width.', 'File');
+      $this->assertTrue($info['height'] <= 5, 'Image scaled to correct height.', 'File');
+
+      drupal_unlink('temporary://druplicon.png');
+    }
+    else {
+      // TODO: should check that the error is returned if no toolkit is available.
+      $errors = file_validate_image_resolution($this->image, '5x10');
+      $this->assertEqual(count($errors), 1, 'Oversize images that cannot be scaled get an error.', 'File');
+    }
+  }
+
+  /**
+   *  This will ensure the filename length is valid.
+   */
+  function testFileValidateNameLength() {
+    // Create a new file object.
+    $file = new stdClass();
+
+    // Add a filename with an allowed length and test it.
+    $file->filename = str_repeat('x', 240);
+    $this->assertEqual(strlen($file->filename), 240);
+    $errors = file_validate_name_length($file);
+    $this->assertEqual(count($errors), 0, 'No errors reported for 240 length filename.', 'File');
+
+    // Add a filename with a length too long and test it.
+    $file->filename = str_repeat('x', 241);
+    $errors = file_validate_name_length($file);
+    $this->assertEqual(count($errors), 1, 'An error reported for 241 length filename.', 'File');
+
+    // Add a filename with an empty string and test it.
+    $file->filename = '';
+    $errors = file_validate_name_length($file);
+    $this->assertEqual(count($errors), 1, 'An error reported for 0 length filename.', 'File');
+  }
+
+
+  /**
+   * Test file_validate_size().
+   */
+  function testFileValidateSize() {
+    // Create a file with a size of 1000 bytes, and quotas of only 1 byte.
+    $file = new stdClass();
+    $file->filesize = 1000;
+    $errors = file_validate_size($file, 0, 0);
+    $this->assertEqual(count($errors), 0, 'No limits means no errors.', 'File');
+    $errors = file_validate_size($file, 1, 0);
+    $this->assertEqual(count($errors), 1, 'Error for the file being over the limit.', 'File');
+    $errors = file_validate_size($file, 0, 1);
+    $this->assertEqual(count($errors), 1, 'Error for the user being over their limit.', 'File');
+    $errors = file_validate_size($file, 1, 1);
+    $this->assertEqual(count($errors), 2, 'Errors for both the file and their limit.', 'File');
+  }
+}
+
+
+
+/**
+ *  Tests the file_unmanaged_save_data() function.
+ */
+class FileUnmanagedSaveDataTest extends FileTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'Unmanaged file save data',
+      'description' => 'Tests the unmanaged file save data function.',
+      'group' => 'File API',
+    );
+  }
+
+  /**
+   * Test the file_unmanaged_save_data() function.
+   */
+  function testFileSaveData() {
+    $contents = $this->randomName(8);
+
+    // No filename.
+    $filepath = file_unmanaged_save_data($contents);
+    $this->assertTrue($filepath, 'Unnamed file saved correctly.');
+    $this->assertEqual(file_uri_scheme($filepath), file_default_scheme(), "File was placed in Drupal's files directory.");
+    $this->assertEqual($contents, file_get_contents($filepath), 'Contents of the file are correct.');
+
+    // Provide a filename.
+    $filepath = file_unmanaged_save_data($contents, 'public://asdf.txt', FILE_EXISTS_REPLACE);
+    $this->assertTrue($filepath, 'Unnamed file saved correctly.');
+    $this->assertEqual('asdf.txt', drupal_basename($filepath), 'File was named correctly.');
+    $this->assertEqual($contents, file_get_contents($filepath), 'Contents of the file are correct.');
+    $this->assertFilePermissions($filepath, variable_get('file_chmod_file', 0664));
+  }
+}
+
+/**
+ *  Tests the file_unmanaged_save_data() function on remote filesystems.
+ */
+class RemoteFileUnmanagedSaveDataTest extends FileUnmanagedSaveDataTest {
+  public static function getInfo() {
+    $info = parent::getInfo();
+    $info['group'] = 'File API (remote)';
+    return $info;
+  }
+
+  function setUp() {
+    parent::setUp('file_test');
+    variable_set('file_default_scheme', 'dummy-remote');
+  }
+}
+
+/**
+ * Test the file_save_upload() function.
+ */
+class FileSaveUploadTest extends FileHookTestCase {
+  /**
+   * An image file path for uploading.
+   */
+  protected $image;
+
+  /**
+   * A PHP file path for upload security testing.
+   */
+  protected $phpfile;
+
+  /**
+   * The largest file id when the test starts.
+   */
+  protected $maxFidBefore;
+
+  public static function getInfo() {
+    return array(
+      'name' => 'File uploading',
+      'description' => 'Tests the file uploading functions.',
+      'group' => 'File API',
+    );
+  }
+
+  function setUp() {
+    parent::setUp();
+    $account = $this->drupalCreateUser(array('access content'));
+    $this->drupalLogin($account);
+
+    $image_files = $this->drupalGetTestFiles('image');
+    $this->image = current($image_files);
+
+    list(, $this->image_extension) = explode('.', $this->image->filename);
+    $this->assertTrue(is_file($this->image->uri), "The image file we're going to upload exists.");
+
+    $this->phpfile = current($this->drupalGetTestFiles('php'));
+    $this->assertTrue(is_file($this->phpfile->uri), "The PHP file we're going to upload exists.");
+
+    $this->maxFidBefore = db_query('SELECT MAX(fid) AS fid FROM {file_managed}')->fetchField();
+
+    // Upload with replace to guarantee there's something there.
+    $edit = array(
+      'file_test_replace' => FILE_EXISTS_REPLACE,
+      'files[file_test_upload]' => drupal_realpath($this->image->uri),
+    );
+    $this->drupalPost('file-test/upload', $edit, t('Submit'));
+    $this->assertResponse(200, 'Received a 200 response for posted test file.');
+    $this->assertRaw(t('You WIN!'), 'Found the success message.');
+
+    // Check that the correct hooks were called then clean out the hook
+    // counters.
+    $this->assertFileHooksCalled(array('validate', 'insert'));
+    file_test_reset();
+  }
+
+  /**
+   * Test the file_save_upload() function.
+   */
+  function testNormal() {
+    $max_fid_after = db_query('SELECT MAX(fid) AS fid FROM {file_managed}')->fetchField();
+    $this->assertTrue($max_fid_after > $this->maxFidBefore, 'A new file was created.');
+    $file1 = file_load($max_fid_after);
+    $this->assertTrue($file1, 'Loaded the file.');
+    // MIME type of the uploaded image may be either image/jpeg or image/png.
+    $this->assertEqual(substr($file1->filemime, 0, 5), 'image', 'A MIME type was set.');
+
+    // Reset the hook counters to get rid of the 'load' we just called.
+    file_test_reset();
+
+    // Upload a second file.
+    $max_fid_before = db_query('SELECT MAX(fid) AS fid FROM {file_managed}')->fetchField();
+    $image2 = current($this->drupalGetTestFiles('image'));
+    $edit = array('files[file_test_upload]' => drupal_realpath($image2->uri));
+    $this->drupalPost('file-test/upload', $edit, t('Submit'));
+    $this->assertResponse(200, 'Received a 200 response for posted test file.');
+    $this->assertRaw(t('You WIN!'));
+    $max_fid_after = db_query('SELECT MAX(fid) AS fid FROM {file_managed}')->fetchField();
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('validate', 'insert'));
+
+    $file2 = file_load($max_fid_after);
+    $this->assertTrue($file2);
+    // MIME type of the uploaded image may be either image/jpeg or image/png.
+    $this->assertEqual(substr($file2->filemime, 0, 5), 'image', 'A MIME type was set.');
+
+    // Load both files using file_load_multiple().
+    $files = file_load_multiple(array($file1->fid, $file2->fid));
+    $this->assertTrue(isset($files[$file1->fid]), 'File was loaded successfully');
+    $this->assertTrue(isset($files[$file2->fid]), 'File was loaded successfully');
+
+    // Upload a third file to a subdirectory.
+    $image3 = current($this->drupalGetTestFiles('image'));
+    $image3_realpath = drupal_realpath($image3->uri);
+    $dir = $this->randomName();
+    $edit = array(
+      'files[file_test_upload]' => $image3_realpath,
+      'file_subdir' => $dir,
+    );
+    $this->drupalPost('file-test/upload', $edit, t('Submit'));
+    $this->assertResponse(200, 'Received a 200 response for posted test file.');
+    $this->assertRaw(t('You WIN!'));
+    $this->assertTrue(is_file('temporary://' . $dir . '/' . trim(drupal_basename($image3_realpath))));
+
+    // Check that file_load_multiple() with no arguments returns FALSE.
+    $this->assertFalse(file_load_multiple(), 'No files were loaded.');
+  }
+
+  /**
+   * Test extension handling.
+   */
+  function testHandleExtension() {
+    // The file being tested is a .gif which is in the default safe list
+    // of extensions to allow when the extension validator isn't used. This is
+    // implicitly tested at the testNormal() test. Here we tell
+    // file_save_upload() to only allow ".foo".
+    $extensions = 'foo';
+    $edit = array(
+      'file_test_replace' => FILE_EXISTS_REPLACE,
+      'files[file_test_upload]' => drupal_realpath($this->image->uri),
+      'extensions' => $extensions,
+    );
+
+    $this->drupalPost('file-test/upload', $edit, t('Submit'));
+    $this->assertResponse(200, 'Received a 200 response for posted test file.');
+    $message = t('Only files with the following extensions are allowed:') . ' <em class="placeholder">' . $extensions . '</em>';
+    $this->assertRaw($message, 'Cannot upload a disallowed extension');
+    $this->assertRaw(t('Epic upload FAIL!'), 'Found the failure message.');
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('validate'));
+
+    // Reset the hook counters.
+    file_test_reset();
+
+    $extensions = 'foo ' . $this->image_extension;
+    // Now tell file_save_upload() to allow the extension of our test image.
+    $edit = array(
+      'file_test_replace' => FILE_EXISTS_REPLACE,
+      'files[file_test_upload]' => drupal_realpath($this->image->uri),
+      'extensions' => $extensions,
+    );
+
+    $this->drupalPost('file-test/upload', $edit, t('Submit'));
+    $this->assertResponse(200, 'Received a 200 response for posted test file.');
+    $this->assertNoRaw(t('Only files with the following extensions are allowed:'), 'Can upload an allowed extension.');
+    $this->assertRaw(t('You WIN!'), 'Found the success message.');
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('validate', 'load', 'update'));
+
+    // Reset the hook counters.
+    file_test_reset();
+
+    // Now tell file_save_upload() to allow any extension.
+    $edit = array(
+      'file_test_replace' => FILE_EXISTS_REPLACE,
+      'files[file_test_upload]' => drupal_realpath($this->image->uri),
+      'allow_all_extensions' => TRUE,
+    );
+    $this->drupalPost('file-test/upload', $edit, t('Submit'));
+    $this->assertResponse(200, 'Received a 200 response for posted test file.');
+    $this->assertNoRaw(t('Only files with the following extensions are allowed:'), 'Can upload any extension.');
+    $this->assertRaw(t('You WIN!'), 'Found the success message.');
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('validate', 'load', 'update'));
+  }
+
+  /**
+   * Test dangerous file handling.
+   */
+  function testHandleDangerousFile() {
+    // Allow the .php extension and make sure it gets renamed to .txt for
+    // safety. Also check to make sure its MIME type was changed.
+    $edit = array(
+      'file_test_replace' => FILE_EXISTS_REPLACE,
+      'files[file_test_upload]' => drupal_realpath($this->phpfile->uri),
+      'is_image_file' => FALSE,
+      'extensions' => 'php',
+    );
+
+    $this->drupalPost('file-test/upload', $edit, t('Submit'));
+    $this->assertResponse(200, 'Received a 200 response for posted test file.');
+    $message = t('For security reasons, your upload has been renamed to') . ' <em class="placeholder">' . $this->phpfile->filename . '.txt' . '</em>';
+    $this->assertRaw($message, 'Dangerous file was renamed.');
+    $this->assertRaw(t('File MIME type is text/plain.'), "Dangerous file's MIME type was changed.");
+    $this->assertRaw(t('You WIN!'), 'Found the success message.');
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('validate', 'insert'));
+
+    // Ensure dangerous files are not renamed when insecure uploads is TRUE.
+    // Turn on insecure uploads.
+    variable_set('allow_insecure_uploads', 1);
+    // Reset the hook counters.
+    file_test_reset();
+
+    $this->drupalPost('file-test/upload', $edit, t('Submit'));
+    $this->assertResponse(200, 'Received a 200 response for posted test file.');
+    $this->assertNoRaw(t('For security reasons, your upload has been renamed'), 'Found no security message.');
+    $this->assertRaw(t('File name is !filename', array('!filename' => $this->phpfile->filename)), 'Dangerous file was not renamed when insecure uploads is TRUE.');
+    $this->assertRaw(t('You WIN!'), 'Found the success message.');
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('validate', 'insert'));
+
+    // Turn off insecure uploads.
+    variable_set('allow_insecure_uploads', 0);
+  }
+
+  /**
+   * Test file munge handling.
+   */
+  function testHandleFileMunge() {
+    // Ensure insecure uploads are disabled for this test.
+    variable_set('allow_insecure_uploads', 0);
+    $this->image = file_move($this->image, $this->image->uri . '.foo.' . $this->image_extension);
+
+    // Reset the hook counters to get rid of the 'move' we just called.
+    file_test_reset();
+
+    $extensions = $this->image_extension;
+    $edit = array(
+      'files[file_test_upload]' => drupal_realpath($this->image->uri),
+      'extensions' => $extensions,
+    );
+
+    $munged_filename = $this->image->filename;
+    $munged_filename = substr($munged_filename, 0, strrpos($munged_filename, '.'));
+    $munged_filename .= '_.' . $this->image_extension;
+
+    $this->drupalPost('file-test/upload', $edit, t('Submit'));
+    $this->assertResponse(200, 'Received a 200 response for posted test file.');
+    $this->assertRaw(t('For security reasons, your upload has been renamed'), 'Found security message.');
+    $this->assertRaw(t('File name is !filename', array('!filename' => $munged_filename)), 'File was successfully munged.');
+    $this->assertRaw(t('You WIN!'), 'Found the success message.');
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('validate', 'insert'));
+
+    // Ensure we don't munge files if we're allowing any extension.
+    // Reset the hook counters.
+    file_test_reset();
+
+    $edit = array(
+      'files[file_test_upload]' => drupal_realpath($this->image->uri),
+      'allow_all_extensions' => TRUE,
+    );
+
+    $this->drupalPost('file-test/upload', $edit, t('Submit'));
+    $this->assertResponse(200, 'Received a 200 response for posted test file.');
+    $this->assertNoRaw(t('For security reasons, your upload has been renamed'), 'Found no security message.');
+    $this->assertRaw(t('File name is !filename', array('!filename' => $this->image->filename)), 'File was not munged when allowing any extension.');
+    $this->assertRaw(t('You WIN!'), 'Found the success message.');
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('validate', 'insert'));
+  }
+
+  /**
+   * Test renaming when uploading over a file that already exists.
+   */
+  function testExistingRename() {
+    $edit = array(
+      'file_test_replace' => FILE_EXISTS_RENAME,
+      'files[file_test_upload]' => drupal_realpath($this->image->uri)
+    );
+    $this->drupalPost('file-test/upload', $edit, t('Submit'));
+    $this->assertResponse(200, 'Received a 200 response for posted test file.');
+    $this->assertRaw(t('You WIN!'), 'Found the success message.');
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('validate', 'insert'));
+  }
+
+  /**
+   * Test replacement when uploading over a file that already exists.
+   */
+  function testExistingReplace() {
+    $edit = array(
+      'file_test_replace' => FILE_EXISTS_REPLACE,
+      'files[file_test_upload]' => drupal_realpath($this->image->uri)
+    );
+    $this->drupalPost('file-test/upload', $edit, t('Submit'));
+    $this->assertResponse(200, 'Received a 200 response for posted test file.');
+    $this->assertRaw(t('You WIN!'), 'Found the success message.');
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('validate', 'load', 'update'));
+  }
+
+  /**
+   * Test for failure when uploading over a file that already exists.
+   */
+  function testExistingError() {
+    $edit = array(
+      'file_test_replace' => FILE_EXISTS_ERROR,
+      'files[file_test_upload]' => drupal_realpath($this->image->uri)
+    );
+    $this->drupalPost('file-test/upload', $edit, t('Submit'));
+    $this->assertResponse(200, 'Received a 200 response for posted test file.');
+    $this->assertRaw(t('Epic upload FAIL!'), 'Found the failure message.');
+
+    // Check that the no hooks were called while failing.
+    $this->assertFileHooksCalled(array());
+  }
+
+  /**
+   * Test for no failures when not uploading a file.
+   */
+  function testNoUpload() {
+    $this->drupalPost('file-test/upload', array(), t('Submit'));
+    $this->assertNoRaw(t('Epic upload FAIL!'), 'Failure message not found.');
+  }
+}
+
+/**
+ * Test the file_save_upload() function on remote filesystems.
+ */
+class RemoteFileSaveUploadTest extends FileSaveUploadTest {
+  public static function getInfo() {
+    $info = parent::getInfo();
+    $info['group'] = 'File API (remote)';
+    return $info;
+  }
+
+  function setUp() {
+    parent::setUp('file_test');
+    variable_set('file_default_scheme', 'dummy-remote');
+  }
+}
+
+/**
+ * Directory related tests.
+ */
+class FileDirectoryTest extends FileTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'File paths and directories',
+      'description' => 'Tests operations dealing with directories.',
+      'group' => 'File API',
+    );
+  }
+
+  /**
+   * Test directory handling functions.
+   */
+  function testFileCheckDirectoryHandling() {
+    // A directory to operate on.
+    $directory = file_default_scheme() . '://' . $this->randomName() . '/' . $this->randomName();
+    $this->assertFalse(is_dir($directory), 'Directory does not exist prior to testing.');
+
+    // Non-existent directory.
+    $this->assertFalse(file_prepare_directory($directory, 0), 'Error reported for non-existing directory.', 'File');
+
+    // Make a directory.
+    $this->assertTrue(file_prepare_directory($directory, FILE_CREATE_DIRECTORY), 'No error reported when creating a new directory.', 'File');
+
+    // Make sure directory actually exists.
+    $this->assertTrue(is_dir($directory), 'Directory actually exists.', 'File');
+
+    if (substr(PHP_OS, 0, 3) != 'WIN') {
+      // PHP on Windows doesn't support any kind of useful read-only mode for
+      // directories. When executing a chmod() on a directory, PHP only sets the
+      // read-only flag, which doesn't prevent files to actually be written
+      // in the directory on any recent version of Windows.
+
+      // Make directory read only.
+      @drupal_chmod($directory, 0444);
+      $this->assertFalse(file_prepare_directory($directory, 0), 'Error reported for a non-writeable directory.', 'File');
+
+      // Test directory permission modification.
+      $this->assertTrue(file_prepare_directory($directory, FILE_MODIFY_PERMISSIONS), 'No error reported when making directory writeable.', 'File');
+    }
+
+    // Test that the directory has the correct permissions.
+    $this->assertDirectoryPermissions($directory, variable_get('file_chmod_directory', 0775));
+
+    // Remove .htaccess file to then test that it gets re-created.
+    @drupal_unlink(file_default_scheme() . '://.htaccess');
+    $this->assertFalse(is_file(file_default_scheme() . '://.htaccess'), 'Successfully removed the .htaccess file in the files directory.', 'File');
+    file_ensure_htaccess();
+    $this->assertTrue(is_file(file_default_scheme() . '://.htaccess'), 'Successfully re-created the .htaccess file in the files directory.', 'File');
+    // Verify contents of .htaccess file.
+    $file = file_get_contents(file_default_scheme() . '://.htaccess');
+    $this->assertEqual($file, file_htaccess_lines(FALSE), 'The .htaccess file contains the proper content.', 'File');
+  }
+
+  /**
+   * This will take a directory and path, and find a valid filepath that is not
+   * taken by another file.
+   */
+  function testFileCreateNewFilepath() {
+    // First we test against an imaginary file that does not exist in a
+    // directory.
+    $basename = 'xyz.txt';
+    $directory = 'misc';
+    $original = $directory . '/' . $basename;
+    $path = file_create_filename($basename, $directory);
+    $this->assertEqual($path, $original, format_string('New filepath %new equals %original.', array('%new' => $path, '%original' => $original)), 'File');
+
+    // Then we test against a file that already exists within that directory.
+    $basename = 'druplicon.png';
+    $original = $directory . '/' . $basename;
+    $expected = $directory . '/druplicon_0.png';
+    $path = file_create_filename($basename, $directory);
+    $this->assertEqual($path, $expected, format_string('Creating a new filepath from %original equals %new.', array('%new' => $path, '%original' => $original)), 'File');
+
+    // @TODO: Finally we copy a file into a directory several times, to ensure a properly iterating filename suffix.
+  }
+
+  /**
+   * This will test the filepath for a destination based on passed flags and
+   * whether or not the file exists.
+   *
+   * If a file exists, file_destination($destination, $replace) will either
+   * return:
+   * - the existing filepath, if $replace is FILE_EXISTS_REPLACE
+   * - a new filepath if FILE_EXISTS_RENAME
+   * - an error (returning FALSE) if FILE_EXISTS_ERROR.
+   * If the file doesn't currently exist, then it will simply return the
+   * filepath.
+   */
+  function testFileDestination() {
+    // First test for non-existent file.
+    $destination = 'misc/xyz.txt';
+    $path = file_destination($destination, FILE_EXISTS_REPLACE);
+    $this->assertEqual($path, $destination, 'Non-existing filepath destination is correct with FILE_EXISTS_REPLACE.', 'File');
+    $path = file_destination($destination, FILE_EXISTS_RENAME);
+    $this->assertEqual($path, $destination, 'Non-existing filepath destination is correct with FILE_EXISTS_RENAME.', 'File');
+    $path = file_destination($destination, FILE_EXISTS_ERROR);
+    $this->assertEqual($path, $destination, 'Non-existing filepath destination is correct with FILE_EXISTS_ERROR.', 'File');
+
+    $destination = 'misc/druplicon.png';
+    $path = file_destination($destination, FILE_EXISTS_REPLACE);
+    $this->assertEqual($path, $destination, 'Existing filepath destination remains the same with FILE_EXISTS_REPLACE.', 'File');
+    $path = file_destination($destination, FILE_EXISTS_RENAME);
+    $this->assertNotEqual($path, $destination, 'A new filepath destination is created when filepath destination already exists with FILE_EXISTS_RENAME.', 'File');
+    $path = file_destination($destination, FILE_EXISTS_ERROR);
+    $this->assertEqual($path, FALSE, 'An error is returned when filepath destination already exists with FILE_EXISTS_ERROR.', 'File');
+  }
+
+  /**
+   * Ensure that the file_directory_temp() function always returns a value.
+   */
+  function testFileDirectoryTemp() {
+    // Start with an empty variable to ensure we have a clean slate.
+    variable_set('file_temporary_path', '');
+    $tmp_directory = file_directory_temp();
+    $this->assertEqual(empty($tmp_directory), FALSE, 'file_directory_temp() returned a non-empty value.');
+    $setting = variable_get('file_temporary_path', '');
+    $this->assertEqual($setting, $tmp_directory, "The 'file_temporary_path' variable has the same value that file_directory_temp() returned.");
+  }
+}
+
+/**
+ * Directory related tests.
+ */
+class RemoteFileDirectoryTest extends FileDirectoryTest {
+  public static function getInfo() {
+    $info = parent::getInfo();
+    $info['group'] = 'File API (remote)';
+    return $info;
+  }
+
+  function setUp() {
+    parent::setUp('file_test');
+    variable_set('file_default_scheme', 'dummy-remote');
+  }
+}
+
+/**
+ * Tests the file_scan_directory() function.
+ */
+class FileScanDirectoryTest extends FileTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'File scan directory',
+      'description' => 'Tests the file_scan_directory() function.',
+      'group' => 'File API',
+    );
+  }
+
+  function setUp() {
+    parent::setUp();
+    $this->path = drupal_get_path('module', 'simpletest') . '/files';
+  }
+
+  /**
+   * Check the format of the returned values.
+   */
+  function testReturn() {
+    // Grab a listing of all the JavaSscript files and check that they're
+    // passed to the callback.
+    $all_files = file_scan_directory($this->path, '/^javascript-/');
+    ksort($all_files);
+    $this->assertEqual(2, count($all_files), 'Found two, expected javascript files.');
+
+    // Check the first file.
+    $file = reset($all_files);
+    $this->assertEqual(key($all_files), $file->uri, 'Correct array key was used for the first returned file.');
+    $this->assertEqual($file->uri, $this->path . '/javascript-1.txt', 'First file name was set correctly.');
+    $this->assertEqual($file->filename, 'javascript-1.txt', 'First basename was set correctly');
+    $this->assertEqual($file->name, 'javascript-1', 'First name was set correctly.');
+
+    // Check the second file.
+    $file = next($all_files);
+    $this->assertEqual(key($all_files), $file->uri, 'Correct array key was used for the second returned file.');
+    $this->assertEqual($file->uri, $this->path . '/javascript-2.script', 'Second file name was set correctly.');
+    $this->assertEqual($file->filename, 'javascript-2.script', 'Second basename was set correctly');
+    $this->assertEqual($file->name, 'javascript-2', 'Second name was set correctly.');
+  }
+
+  /**
+   * Check that the callback function is called correctly.
+   */
+  function testOptionCallback() {
+    // When nothing is matched nothing should be passed to the callback.
+    $all_files = file_scan_directory($this->path, '/^NONEXISTINGFILENAME/', array('callback' => 'file_test_file_scan_callback'));
+    $this->assertEqual(0, count($all_files), 'No files were found.');
+    $results = file_test_file_scan_callback();
+    file_test_file_scan_callback_reset();
+    $this->assertEqual(0, count($results), 'No files were passed to the callback.');
+
+    // Grab a listing of all the JavaSscript files and check that they're
+    // passed to the callback.
+    $all_files = file_scan_directory($this->path, '/^javascript-/', array('callback' => 'file_test_file_scan_callback'));
+    $this->assertEqual(2, count($all_files), 'Found two, expected javascript files.');
+    $results = file_test_file_scan_callback();
+    file_test_file_scan_callback_reset();
+    $this->assertEqual(2, count($results), 'Files were passed to the callback.');
+  }
+
+  /**
+   * Check that the no-mask parameter is honored.
+   */
+  function testOptionNoMask() {
+    // Grab a listing of all the JavaSscript files.
+    $all_files = file_scan_directory($this->path, '/^javascript-/');
+    $this->assertEqual(2, count($all_files), 'Found two, expected javascript files.');
+
+    // Now use the nomast parameter to filter out the .script file.
+    $filtered_files = file_scan_directory($this->path, '/^javascript-/', array('nomask' => '/.script$/'));
+    $this->assertEqual(1, count($filtered_files), 'Filtered correctly.');
+  }
+
+  /**
+   * Check that key parameter sets the return value's key.
+   */
+  function testOptionKey() {
+    // "filename", for the path starting with $dir.
+    $expected = array($this->path . '/javascript-1.txt', $this->path . '/javascript-2.script');
+    $actual = array_keys(file_scan_directory($this->path, '/^javascript-/', array('key' => 'filepath')));
+    sort($actual);
+    $this->assertEqual($expected, $actual, 'Returned the correct values for the filename key.');
+
+    // "basename", for the basename of the file.
+    $expected = array('javascript-1.txt', 'javascript-2.script');
+    $actual = array_keys(file_scan_directory($this->path, '/^javascript-/', array('key' => 'filename')));
+    sort($actual);
+    $this->assertEqual($expected, $actual, 'Returned the correct values for the basename key.');
+
+    // "name" for the name of the file without an extension.
+    $expected = array('javascript-1', 'javascript-2');
+    $actual = array_keys(file_scan_directory($this->path, '/^javascript-/', array('key' => 'name')));
+    sort($actual);
+    $this->assertEqual($expected, $actual, 'Returned the correct values for the name key.');
+
+    // Invalid option that should default back to "filename".
+    $expected = array($this->path . '/javascript-1.txt', $this->path . '/javascript-2.script');
+    $actual = array_keys(file_scan_directory($this->path, '/^javascript-/', array('key' => 'INVALID')));
+    sort($actual);
+    $this->assertEqual($expected, $actual, 'An invalid key defaulted back to the default.');
+  }
+
+  /**
+   * Check that the recurse option decends into subdirectories.
+   */
+  function testOptionRecurse() {
+    $files = file_scan_directory(drupal_get_path('module', 'simpletest'), '/^javascript-/', array('recurse' => FALSE));
+    $this->assertTrue(empty($files), "Without recursion couldn't find javascript files.");
+
+    $files = file_scan_directory(drupal_get_path('module', 'simpletest'), '/^javascript-/', array('recurse' => TRUE));
+    $this->assertEqual(2, count($files), 'With recursion we found the expected javascript files.');
+  }
+
+
+  /**
+   * Check that the min_depth options lets us ignore files in the starting
+   * directory.
+   */
+  function testOptionMinDepth() {
+    $files = file_scan_directory($this->path, '/^javascript-/', array('min_depth' => 0));
+    $this->assertEqual(2, count($files), 'No minimum-depth gets files in current directory.');
+
+    $files = file_scan_directory($this->path, '/^javascript-/', array('min_depth' => 1));
+    $this->assertTrue(empty($files), "Minimum-depth of 1 successfully excludes files from current directory.");
+  }
+}
+
+/**
+ * Tests the file_scan_directory() function on remote filesystems.
+ */
+class RemoteFileScanDirectoryTest extends FileScanDirectoryTest {
+  public static function getInfo() {
+    $info = parent::getInfo();
+    $info['group'] = 'File API (remote)';
+    return $info;
+  }
+
+  function setUp() {
+    parent::setUp('file_test');
+    variable_set('file_default_scheme', 'dummy-remote');
+  }
+}
+
+/**
+ * Deletion related tests.
+ */
+class FileUnmanagedDeleteTest extends FileTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'Unmanaged file delete',
+      'description' => 'Tests the unmanaged file delete function.',
+      'group' => 'File API',
+    );
+  }
+
+  /**
+   * Delete a normal file.
+   */
+  function testNormal() {
+    // Create a file for testing
+    $file = $this->createFile();
+
+    // Delete a regular file
+    $this->assertTrue(file_unmanaged_delete($file->uri), 'Deleted worked.');
+    $this->assertFalse(file_exists($file->uri), 'Test file has actually been deleted.');
+  }
+
+  /**
+   * Try deleting a missing file.
+   */
+  function testMissing() {
+    // Try to delete a non-existing file
+    $this->assertTrue(file_unmanaged_delete(file_default_scheme() . '/' . $this->randomName()), 'Returns true when deleting a non-existent file.');
+  }
+
+  /**
+   * Try deleting a directory.
+   */
+  function testDirectory() {
+    // A directory to operate on.
+    $directory = $this->createDirectory();
+
+    // Try to delete a directory
+    $this->assertFalse(file_unmanaged_delete($directory), 'Could not delete the delete directory.');
+    $this->assertTrue(file_exists($directory), 'Directory has not been deleted.');
+  }
+}
+
+/**
+ * Deletion related tests on remote filesystems.
+ */
+class RemoteFileUnmanagedDeleteTest extends FileUnmanagedDeleteTest {
+  public static function getInfo() {
+    $info = parent::getInfo();
+    $info['group'] = 'File API (remote)';
+    return $info;
+  }
+
+  function setUp() {
+    parent::setUp('file_test');
+    variable_set('file_default_scheme', 'dummy-remote');
+  }
+}
+
+/**
+ * Deletion related tests.
+ */
+class FileUnmanagedDeleteRecursiveTest extends FileTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'Unmanaged recursive file delete',
+      'description' => 'Tests the unmanaged file delete recursive function.',
+      'group' => 'File API',
+    );
+  }
+
+  /**
+   * Delete a normal file.
+   */
+  function testSingleFile() {
+    // Create a file for testing
+    $filepath = file_default_scheme() . '://' . $this->randomName();
+    file_put_contents($filepath, '');
+
+    // Delete the file.
+    $this->assertTrue(file_unmanaged_delete_recursive($filepath), 'Function reported success.');
+    $this->assertFalse(file_exists($filepath), 'Test file has been deleted.');
+  }
+
+  /**
+   * Try deleting an empty directory.
+   */
+  function testEmptyDirectory() {
+    // A directory to operate on.
+    $directory = $this->createDirectory();
+
+    // Delete the directory.
+    $this->assertTrue(file_unmanaged_delete_recursive($directory), 'Function reported success.');
+    $this->assertFalse(file_exists($directory), 'Directory has been deleted.');
+  }
+
+  /**
+   * Try deleting a directory with some files.
+   */
+  function testDirectory() {
+    // A directory to operate on.
+    $directory = $this->createDirectory();
+    $filepathA = $directory . '/A';
+    $filepathB = $directory . '/B';
+    file_put_contents($filepathA, '');
+    file_put_contents($filepathB, '');
+
+    // Delete the directory.
+    $this->assertTrue(file_unmanaged_delete_recursive($directory), 'Function reported success.');
+    $this->assertFalse(file_exists($filepathA), 'Test file A has been deleted.');
+    $this->assertFalse(file_exists($filepathB), 'Test file B has been deleted.');
+    $this->assertFalse(file_exists($directory), 'Directory has been deleted.');
+  }
+
+  /**
+   * Try deleting subdirectories with some files.
+   */
+  function testSubDirectory() {
+    // A directory to operate on.
+    $directory = $this->createDirectory();
+    $subdirectory = $this->createDirectory($directory . '/sub');
+    $filepathA = $directory . '/A';
+    $filepathB = $subdirectory . '/B';
+    file_put_contents($filepathA, '');
+    file_put_contents($filepathB, '');
+
+    // Delete the directory.
+    $this->assertTrue(file_unmanaged_delete_recursive($directory), 'Function reported success.');
+    $this->assertFalse(file_exists($filepathA), 'Test file A has been deleted.');
+    $this->assertFalse(file_exists($filepathB), 'Test file B has been deleted.');
+    $this->assertFalse(file_exists($subdirectory), 'Subdirectory has been deleted.');
+    $this->assertFalse(file_exists($directory), 'Directory has been deleted.');
+  }
+}
+
+/**
+ * Deletion related tests on remote filesystems.
+ */
+class RemoteFileUnmanagedDeleteRecursiveTest extends FileUnmanagedDeleteRecursiveTest {
+  public static function getInfo() {
+    $info = parent::getInfo();
+    $info['group'] = 'File API (remote)';
+    return $info;
+  }
+
+  function setUp() {
+    parent::setUp('file_test');
+    variable_set('file_default_scheme', 'dummy-remote');
+  }
+}
+
+/**
+ * Unmanaged move related tests.
+ */
+class FileUnmanagedMoveTest extends FileTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'Unmanaged file moving',
+      'description' => 'Tests the unmanaged file move function.',
+      'group' => 'File API',
+    );
+  }
+
+  /**
+   * Move a normal file.
+   */
+  function testNormal() {
+    // Create a file for testing
+    $file = $this->createFile();
+
+    // Moving to a new name.
+    $desired_filepath = 'public://' . $this->randomName();
+    $new_filepath = file_unmanaged_move($file->uri, $desired_filepath, FILE_EXISTS_ERROR);
+    $this->assertTrue($new_filepath, 'Move was successful.');
+    $this->assertEqual($new_filepath, $desired_filepath, 'Returned expected filepath.');
+    $this->assertTrue(file_exists($new_filepath), 'File exists at the new location.');
+    $this->assertFalse(file_exists($file->uri), 'No file remains at the old location.');
+    $this->assertFilePermissions($new_filepath, variable_get('file_chmod_file', 0664));
+
+    // Moving with rename.
+    $desired_filepath = 'public://' . $this->randomName();
+    $this->assertTrue(file_exists($new_filepath), 'File exists before moving.');
+    $this->assertTrue(file_put_contents($desired_filepath, ' '), 'Created a file so a rename will have to happen.');
+    $newer_filepath = file_unmanaged_move($new_filepath, $desired_filepath, FILE_EXISTS_RENAME);
+    $this->assertTrue($newer_filepath, 'Move was successful.');
+    $this->assertNotEqual($newer_filepath, $desired_filepath, 'Returned expected filepath.');
+    $this->assertTrue(file_exists($newer_filepath), 'File exists at the new location.');
+    $this->assertFalse(file_exists($new_filepath), 'No file remains at the old location.');
+    $this->assertFilePermissions($newer_filepath, variable_get('file_chmod_file', 0664));
+
+    // TODO: test moving to a directory (rather than full directory/file path)
+    // TODO: test creating and moving normal files (rather than streams)
+  }
+
+  /**
+   * Try to move a missing file.
+   */
+  function testMissing() {
+    // Move non-existent file.
+    $new_filepath = file_unmanaged_move($this->randomName(), $this->randomName());
+    $this->assertFalse($new_filepath, 'Moving a missing file fails.');
+  }
+
+  /**
+   * Try to move a file onto itself.
+   */
+  function testOverwriteSelf() {
+    // Create a file for testing.
+    $file = $this->createFile();
+
+    // Move the file onto itself without renaming shouldn't make changes.
+    $new_filepath = file_unmanaged_move($file->uri, $file->uri, FILE_EXISTS_REPLACE);
+    $this->assertFalse($new_filepath, 'Moving onto itself without renaming fails.');
+    $this->assertTrue(file_exists($file->uri), 'File exists after moving onto itself.');
+
+    // Move the file onto itself with renaming will result in a new filename.
+    $new_filepath = file_unmanaged_move($file->uri, $file->uri, FILE_EXISTS_RENAME);
+    $this->assertTrue($new_filepath, 'Moving onto itself with renaming works.');
+    $this->assertFalse(file_exists($file->uri), 'Original file has been removed.');
+    $this->assertTrue(file_exists($new_filepath), 'File exists after moving onto itself.');
+  }
+}
+
+/**
+ * Unmanaged move related tests on remote filesystems.
+ */
+class RemoteFileUnmanagedMoveTest extends FileUnmanagedMoveTest {
+  public static function getInfo() {
+    $info = parent::getInfo();
+    $info['group'] = 'File API (remote)';
+    return $info;
+  }
+
+  function setUp() {
+    parent::setUp('file_test');
+    variable_set('file_default_scheme', 'dummy-remote');
+  }
+}
+
+/**
+ * Unmanaged copy related tests.
+ */
+class FileUnmanagedCopyTest extends FileTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'Unmanaged file copying',
+      'description' => 'Tests the unmanaged file copy function.',
+      'group' => 'File API',
+    );
+  }
+
+  /**
+   * Copy a normal file.
+   */
+  function testNormal() {
+    // Create a file for testing
+    $file = $this->createFile();
+
+    // Copying to a new name.
+    $desired_filepath = 'public://' . $this->randomName();
+    $new_filepath = file_unmanaged_copy($file->uri, $desired_filepath, FILE_EXISTS_ERROR);
+    $this->assertTrue($new_filepath, 'Copy was successful.');
+    $this->assertEqual($new_filepath, $desired_filepath, 'Returned expected filepath.');
+    $this->assertTrue(file_exists($file->uri), 'Original file remains.');
+    $this->assertTrue(file_exists($new_filepath), 'New file exists.');
+    $this->assertFilePermissions($new_filepath, variable_get('file_chmod_file', 0664));
+
+    // Copying with rename.
+    $desired_filepath = 'public://' . $this->randomName();
+    $this->assertTrue(file_put_contents($desired_filepath, ' '), 'Created a file so a rename will have to happen.');
+    $newer_filepath = file_unmanaged_copy($file->uri, $desired_filepath, FILE_EXISTS_RENAME);
+    $this->assertTrue($newer_filepath, 'Copy was successful.');
+    $this->assertNotEqual($newer_filepath, $desired_filepath, 'Returned expected filepath.');
+    $this->assertTrue(file_exists($file->uri), 'Original file remains.');
+    $this->assertTrue(file_exists($newer_filepath), 'New file exists.');
+    $this->assertFilePermissions($newer_filepath, variable_get('file_chmod_file', 0664));
+
+    // TODO: test copying to a directory (rather than full directory/file path)
+    // TODO: test copying normal files using normal paths (rather than only streams)
+  }
+
+  /**
+   * Copy a non-existent file.
+   */
+  function testNonExistent() {
+    // Copy non-existent file
+    $desired_filepath = $this->randomName();
+    $this->assertFalse(file_exists($desired_filepath), "Randomly named file doesn't exists.");
+    $new_filepath = file_unmanaged_copy($desired_filepath, $this->randomName());
+    $this->assertFalse($new_filepath, 'Copying a missing file fails.');
+  }
+
+  /**
+   * Copy a file onto itself.
+   */
+  function testOverwriteSelf() {
+    // Create a file for testing
+    $file = $this->createFile();
+
+    // Copy the file onto itself with renaming works.
+    $new_filepath = file_unmanaged_copy($file->uri, $file->uri, FILE_EXISTS_RENAME);
+    $this->assertTrue($new_filepath, 'Copying onto itself with renaming works.');
+    $this->assertNotEqual($new_filepath, $file->uri, 'Copied file has a new name.');
+    $this->assertTrue(file_exists($file->uri), 'Original file exists after copying onto itself.');
+    $this->assertTrue(file_exists($new_filepath), 'Copied file exists after copying onto itself.');
+    $this->assertFilePermissions($new_filepath, variable_get('file_chmod_file', 0664));
+
+    // Copy the file onto itself without renaming fails.
+    $new_filepath = file_unmanaged_copy($file->uri, $file->uri, FILE_EXISTS_ERROR);
+    $this->assertFalse($new_filepath, 'Copying onto itself without renaming fails.');
+    $this->assertTrue(file_exists($file->uri), 'File exists after copying onto itself.');
+
+    // Copy the file into same directory without renaming fails.
+    $new_filepath = file_unmanaged_copy($file->uri, drupal_dirname($file->uri), FILE_EXISTS_ERROR);
+    $this->assertFalse($new_filepath, 'Copying onto itself fails.');
+    $this->assertTrue(file_exists($file->uri), 'File exists after copying onto itself.');
+
+    // Copy the file into same directory with renaming works.
+    $new_filepath = file_unmanaged_copy($file->uri, drupal_dirname($file->uri), FILE_EXISTS_RENAME);
+    $this->assertTrue($new_filepath, 'Copying into same directory works.');
+    $this->assertNotEqual($new_filepath, $file->uri, 'Copied file has a new name.');
+    $this->assertTrue(file_exists($file->uri), 'Original file exists after copying onto itself.');
+    $this->assertTrue(file_exists($new_filepath), 'Copied file exists after copying onto itself.');
+    $this->assertFilePermissions($new_filepath, variable_get('file_chmod_file', 0664));
+  }
+}
+
+/**
+ * Unmanaged copy related tests on remote filesystems.
+ */
+class RemoteFileUnmanagedCopyTest extends FileUnmanagedCopyTest {
+  public static function getInfo() {
+    $info = parent::getInfo();
+    $info['group'] = 'File API (remote)';
+    return $info;
+  }
+
+  function setUp() {
+    parent::setUp('file_test');
+    variable_set('file_default_scheme', 'dummy-remote');
+  }
+}
+
+/**
+ * Deletion related tests.
+ */
+class FileDeleteTest extends FileHookTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'File delete',
+      'description' => 'Tests the file delete function.',
+      'group' => 'File API',
+    );
+  }
+
+  /**
+   * Tries deleting a normal file (as opposed to a directory, symlink, etc).
+   */
+  function testUnused() {
+    $file = $this->createFile();
+
+    // Check that deletion removes the file and database record.
+    $this->assertTrue(is_file($file->uri), 'File exists.');
+    $this->assertIdentical(file_delete($file), TRUE, 'Delete worked.');
+    $this->assertFileHooksCalled(array('delete'));
+    $this->assertFalse(file_exists($file->uri), 'Test file has actually been deleted.');
+    $this->assertFalse(file_load($file->fid), 'File was removed from the database.');
+  }
+
+  /**
+   * Tries deleting a file that is in use.
+   */
+  function testInUse() {
+    $file = $this->createFile();
+    file_usage_add($file, 'testing', 'test', 1);
+    file_usage_add($file, 'testing', 'test', 1);
+
+    file_usage_delete($file, 'testing', 'test', 1);
+    file_delete($file);
+    $usage = file_usage_list($file);
+    $this->assertEqual($usage['testing']['test'], array(1 => 1), 'Test file is still in use.');
+    $this->assertTrue(file_exists($file->uri), 'File still exists on the disk.');
+    $this->assertTrue(file_load($file->fid), 'File still exists in the database.');
+
+    // Clear out the call to hook_file_load().
+    file_test_reset();
+
+    file_usage_delete($file, 'testing', 'test', 1);
+    file_delete($file);
+    $usage = file_usage_list($file);
+    $this->assertFileHooksCalled(array('delete'));
+    $this->assertTrue(empty($usage), 'File usage data was removed.');
+    $this->assertFalse(file_exists($file->uri), 'File has been deleted after its last usage was removed.');
+    $this->assertFalse(file_load($file->fid), 'File was removed from the database.');
+  }
+}
+
+
+/**
+ * Move related tests
+ */
+class FileMoveTest extends FileHookTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'File moving',
+      'description' => 'Tests the file move function.',
+      'group' => 'File API',
+    );
+  }
+
+  /**
+   * Move a normal file.
+   */
+  function testNormal() {
+    $contents = $this->randomName(10);
+    $source = $this->createFile(NULL, $contents);
+    $desired_filepath = 'public://' . $this->randomName();
+
+    // Clone the object so we don't have to worry about the function changing
+    // our reference copy.
+    $result = file_move(clone $source, $desired_filepath, FILE_EXISTS_ERROR);
+
+    // Check the return status and that the contents changed.
+    $this->assertTrue($result, 'File moved successfully.');
+    $this->assertFalse(file_exists($source->uri));
+    $this->assertEqual($contents, file_get_contents($result->uri), 'Contents of file correctly written.');
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('move', 'load', 'update'));
+
+    // Make sure we got the same file back.
+    $this->assertEqual($source->fid, $result->fid, format_string("Source file id's' %fid is unchanged after move.", array('%fid' => $source->fid)));
+
+    // Reload the file from the database and check that the changes were
+    // actually saved.
+    $loaded_file = file_load($result->fid, TRUE);
+    $this->assertTrue($loaded_file, 'File can be loaded from the database.');
+    $this->assertFileUnchanged($result, $loaded_file);
+  }
+
+  /**
+   * Test renaming when moving onto a file that already exists.
+   */
+  function testExistingRename() {
+    // Setup a file to overwrite.
+    $contents = $this->randomName(10);
+    $source = $this->createFile(NULL, $contents);
+    $target = $this->createFile();
+    $this->assertDifferentFile($source, $target);
+
+    // Clone the object so we don't have to worry about the function changing
+    // our reference copy.
+    $result = file_move(clone $source, $target->uri, FILE_EXISTS_RENAME);
+
+    // Check the return status and that the contents changed.
+    $this->assertTrue($result, 'File moved successfully.');
+    $this->assertFalse(file_exists($source->uri));
+    $this->assertEqual($contents, file_get_contents($result->uri), 'Contents of file correctly written.');
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('move', 'load', 'update'));
+
+    // Compare the returned value to what made it into the database.
+    $this->assertFileUnchanged($result, file_load($result->fid, TRUE));
+    // The target file should not have been altered.
+    $this->assertFileUnchanged($target, file_load($target->fid, TRUE));
+    // Make sure we end up with two distinct files afterwards.
+    $this->assertDifferentFile($target, $result);
+
+    // Compare the source and results.
+    $loaded_source = file_load($source->fid, TRUE);
+    $this->assertEqual($loaded_source->fid, $result->fid, "Returned file's id matches the source.");
+    $this->assertNotEqual($loaded_source->uri, $source->uri, 'Returned file path has changed from the original.');
+  }
+
+  /**
+   * Test replacement when moving onto a file that already exists.
+   */
+  function testExistingReplace() {
+    // Setup a file to overwrite.
+    $contents = $this->randomName(10);
+    $source = $this->createFile(NULL, $contents);
+    $target = $this->createFile();
+    $this->assertDifferentFile($source, $target);
+
+    // Clone the object so we don't have to worry about the function changing
+    // our reference copy.
+    $result = file_move(clone $source, $target->uri, FILE_EXISTS_REPLACE);
+
+    // Look at the results.
+    $this->assertEqual($contents, file_get_contents($result->uri), 'Contents of file were overwritten.');
+    $this->assertFalse(file_exists($source->uri));
+    $this->assertTrue($result, 'File moved successfully.');
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('move', 'update', 'delete', 'load'));
+
+    // Reload the file from the database and check that the changes were
+    // actually saved.
+    $loaded_result = file_load($result->fid, TRUE);
+    $this->assertFileUnchanged($result, $loaded_result);
+    // Check that target was re-used.
+    $this->assertSameFile($target, $loaded_result);
+    // Source and result should be totally different.
+    $this->assertDifferentFile($source, $loaded_result);
+  }
+
+  /**
+   * Test replacement when moving onto itself.
+   */
+  function testExistingReplaceSelf() {
+    // Setup a file to overwrite.
+    $contents = $this->randomName(10);
+    $source = $this->createFile(NULL, $contents);
+
+    // Copy the file over itself. Clone the object so we don't have to worry
+    // about the function changing our reference copy.
+    $result = file_move(clone $source, $source->uri, FILE_EXISTS_REPLACE);
+    $this->assertFalse($result, 'File move failed.');
+    $this->assertEqual($contents, file_get_contents($source->uri), 'Contents of file were not altered.');
+
+    // Check that no hooks were called while failing.
+    $this->assertFileHooksCalled(array());
+
+    // Load the file from the database and make sure it is identical to what
+    // was returned.
+    $this->assertFileUnchanged($source, file_load($source->fid, TRUE));
+  }
+
+  /**
+   * Test that moving onto an existing file fails when FILE_EXISTS_ERROR is
+   * specified.
+   */
+  function testExistingError() {
+    $contents = $this->randomName(10);
+    $source = $this->createFile();
+    $target = $this->createFile(NULL, $contents);
+    $this->assertDifferentFile($source, $target);
+
+    // Clone the object so we don't have to worry about the function changing
+    // our reference copy.
+    $result = file_move(clone $source, $target->uri, FILE_EXISTS_ERROR);
+
+    // Check the return status and that the contents did not change.
+    $this->assertFalse($result, 'File move failed.');
+    $this->assertTrue(file_exists($source->uri));
+    $this->assertEqual($contents, file_get_contents($target->uri), 'Contents of file were not altered.');
+
+    // Check that no hooks were called while failing.
+    $this->assertFileHooksCalled(array());
+
+    // Load the file from the database and make sure it is identical to what
+    // was returned.
+    $this->assertFileUnchanged($source, file_load($source->fid, TRUE));
+    $this->assertFileUnchanged($target, file_load($target->fid, TRUE));
+  }
+}
+
+
+/**
+ * Copy related tests.
+ */
+class FileCopyTest extends FileHookTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'File copying',
+      'description' => 'Tests the file copy function.',
+      'group' => 'File API',
+    );
+  }
+
+  /**
+   * Test file copying in the normal, base case.
+   */
+  function testNormal() {
+    $contents = $this->randomName(10);
+    $source = $this->createFile(NULL, $contents);
+    $desired_uri = 'public://' . $this->randomName();
+
+    // Clone the object so we don't have to worry about the function changing
+    // our reference copy.
+    $result = file_copy(clone $source, $desired_uri, FILE_EXISTS_ERROR);
+
+    // Check the return status and that the contents changed.
+    $this->assertTrue($result, 'File copied successfully.');
+    $this->assertEqual($contents, file_get_contents($result->uri), 'Contents of file were copied correctly.');
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('copy', 'insert'));
+
+    $this->assertDifferentFile($source, $result);
+    $this->assertEqual($result->uri, $desired_uri, 'The copied file object has the desired filepath.');
+    $this->assertTrue(file_exists($source->uri), 'The original file still exists.');
+    $this->assertTrue(file_exists($result->uri), 'The copied file exists.');
+
+    // Reload the file from the database and check that the changes were
+    // actually saved.
+    $this->assertFileUnchanged($result, file_load($result->fid, TRUE));
+  }
+
+  /**
+   * Test renaming when copying over a file that already exists.
+   */
+  function testExistingRename() {
+    // Setup a file to overwrite.
+    $contents = $this->randomName(10);
+    $source = $this->createFile(NULL, $contents);
+    $target = $this->createFile();
+    $this->assertDifferentFile($source, $target);
+
+    // Clone the object so we don't have to worry about the function changing
+    // our reference copy.
+    $result = file_copy(clone $source, $target->uri, FILE_EXISTS_RENAME);
+
+    // Check the return status and that the contents changed.
+    $this->assertTrue($result, 'File copied successfully.');
+    $this->assertEqual($contents, file_get_contents($result->uri), 'Contents of file were copied correctly.');
+    $this->assertNotEqual($result->uri, $source->uri, 'Returned file path has changed from the original.');
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('copy', 'insert'));
+
+    // Load all the affected files to check the changes that actually made it
+    // to the database.
+    $loaded_source = file_load($source->fid, TRUE);
+    $loaded_target = file_load($target->fid, TRUE);
+    $loaded_result = file_load($result->fid, TRUE);
+
+    // Verify that the source file wasn't changed.
+    $this->assertFileUnchanged($source, $loaded_source);
+
+    // Verify that what was returned is what's in the database.
+    $this->assertFileUnchanged($result, $loaded_result);
+
+    // Make sure we end up with three distinct files afterwards.
+    $this->assertDifferentFile($loaded_source, $loaded_target);
+    $this->assertDifferentFile($loaded_target, $loaded_result);
+    $this->assertDifferentFile($loaded_source, $loaded_result);
+  }
+
+  /**
+   * Test replacement when copying over a file that already exists.
+   */
+  function testExistingReplace() {
+    // Setup a file to overwrite.
+    $contents = $this->randomName(10);
+    $source = $this->createFile(NULL, $contents);
+    $target = $this->createFile();
+    $this->assertDifferentFile($source, $target);
+
+    // Clone the object so we don't have to worry about the function changing
+    // our reference copy.
+    $result = file_copy(clone $source, $target->uri, FILE_EXISTS_REPLACE);
+
+    // Check the return status and that the contents changed.
+    $this->assertTrue($result, 'File copied successfully.');
+    $this->assertEqual($contents, file_get_contents($result->uri), 'Contents of file were overwritten.');
+    $this->assertDifferentFile($source, $result);
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('load', 'copy', 'update'));
+
+    // Load all the affected files to check the changes that actually made it
+    // to the database.
+    $loaded_source = file_load($source->fid, TRUE);
+    $loaded_target = file_load($target->fid, TRUE);
+    $loaded_result = file_load($result->fid, TRUE);
+
+    // Verify that the source file wasn't changed.
+    $this->assertFileUnchanged($source, $loaded_source);
+
+    // Verify that what was returned is what's in the database.
+    $this->assertFileUnchanged($result, $loaded_result);
+
+    // Target file was reused for the result.
+    $this->assertFileUnchanged($loaded_target, $loaded_result);
+  }
+
+  /**
+   * Test that copying over an existing file fails when FILE_EXISTS_ERROR is
+   * specified.
+   */
+  function testExistingError() {
+    $contents = $this->randomName(10);
+    $source = $this->createFile();
+    $target = $this->createFile(NULL, $contents);
+    $this->assertDifferentFile($source, $target);
+
+    // Clone the object so we don't have to worry about the function changing
+    // our reference copy.
+    $result = file_copy(clone $source, $target->uri, FILE_EXISTS_ERROR);
+
+    // Check the return status and that the contents were not changed.
+    $this->assertFalse($result, 'File copy failed.');
+    $this->assertEqual($contents, file_get_contents($target->uri), 'Contents of file were not altered.');
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array());
+
+    $this->assertFileUnchanged($source, file_load($source->fid, TRUE));
+    $this->assertFileUnchanged($target, file_load($target->fid, TRUE));
+  }
+}
+
+
+/**
+ * Tests the file_load() function.
+ */
+class FileLoadTest extends FileHookTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'File loading',
+      'description' => 'Tests the file_load() function.',
+      'group' => 'File API',
+    );
+  }
+
+  /**
+   * Try to load a non-existent file by fid.
+   */
+  function testLoadMissingFid() {
+    $this->assertFalse(file_load(-1), "Try to load an invalid fid fails.");
+    $this->assertFileHooksCalled(array());
+  }
+
+  /**
+   * Try to load a non-existent file by URI.
+   */
+  function testLoadMissingFilepath() {
+    $files = file_load_multiple(array(), array('uri' => 'foobar://misc/druplicon.png'));
+    $this->assertFalse(reset($files), "Try to load a file that doesn't exist in the database fails.");
+    $this->assertFileHooksCalled(array());
+  }
+
+  /**
+   * Try to load a non-existent file by status.
+   */
+  function testLoadInvalidStatus() {
+    $files = file_load_multiple(array(), array('status' => -99));
+    $this->assertFalse(reset($files), "Trying to load a file with an invalid status fails.");
+    $this->assertFileHooksCalled(array());
+  }
+
+  /**
+   * Load a single file and ensure that the correct values are returned.
+   */
+  function testSingleValues() {
+    // Create a new file object from scratch so we know the values.
+    $file = $this->createFile('druplicon.txt', NULL, 'public');
+
+    $by_fid_file = file_load($file->fid);
+    $this->assertFileHookCalled('load');
+    $this->assertTrue(is_object($by_fid_file), 'file_load() returned an object.');
+    $this->assertEqual($by_fid_file->fid, $file->fid, 'Loading by fid got the same fid.', 'File');
+    $this->assertEqual($by_fid_file->uri, $file->uri, 'Loading by fid got the correct filepath.', 'File');
+    $this->assertEqual($by_fid_file->filename, $file->filename, 'Loading by fid got the correct filename.', 'File');
+    $this->assertEqual($by_fid_file->filemime, $file->filemime, 'Loading by fid got the correct MIME type.', 'File');
+    $this->assertEqual($by_fid_file->status, $file->status, 'Loading by fid got the correct status.', 'File');
+    $this->assertTrue($by_fid_file->file_test['loaded'], 'file_test_file_load() was able to modify the file during load.');
+  }
+
+  /**
+   * This will test loading file data from the database.
+   */
+  function testMultiple() {
+    // Create a new file object.
+    $file = $this->createFile('druplicon.txt', NULL, 'public');
+
+    // Load by path.
+    file_test_reset();
+    $by_path_files = file_load_multiple(array(), array('uri' => $file->uri));
+    $this->assertFileHookCalled('load');
+    $this->assertEqual(1, count($by_path_files), 'file_load_multiple() returned an array of the correct size.');
+    $by_path_file = reset($by_path_files);
+    $this->assertTrue($by_path_file->file_test['loaded'], 'file_test_file_load() was able to modify the file during load.');
+    $this->assertEqual($by_path_file->fid, $file->fid, 'Loading by filepath got the correct fid.', 'File');
+
+    // Load by fid.
+    file_test_reset();
+    $by_fid_files = file_load_multiple(array($file->fid), array());
+    $this->assertFileHookCalled('load');
+    $this->assertEqual(1, count($by_fid_files), 'file_load_multiple() returned an array of the correct size.');
+    $by_fid_file = reset($by_fid_files);
+    $this->assertTrue($by_fid_file->file_test['loaded'], 'file_test_file_load() was able to modify the file during load.');
+    $this->assertEqual($by_fid_file->uri, $file->uri, 'Loading by fid got the correct filepath.', 'File');
+  }
+}
+
+/**
+ * Tests the file_save() function.
+ */
+class FileSaveTest extends FileHookTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'File saving',
+      'description' => 'Tests the file_save() function.',
+      'group' => 'File API',
+    );
+  }
+
+  function testFileSave() {
+    // Create a new file object.
+    $file = array(
+      'uid' => 1,
+      'filename' => 'druplicon.txt',
+      'uri' => 'public://druplicon.txt',
+      'filemime' => 'text/plain',
+      'timestamp' => 1,
+      'status' => FILE_STATUS_PERMANENT,
+    );
+    $file = (object) $file;
+    file_put_contents($file->uri, 'hello world');
+
+    // Save it, inserting a new record.
+    $saved_file = file_save($file);
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('insert'));
+
+    $this->assertNotNull($saved_file, 'Saving the file should give us back a file object.', 'File');
+    $this->assertTrue($saved_file->fid > 0, 'A new file ID is set when saving a new file to the database.', 'File');
+    $loaded_file = db_query('SELECT * FROM {file_managed} f WHERE f.fid = :fid', array(':fid' => $saved_file->fid))->fetch(PDO::FETCH_OBJ);
+    $this->assertNotNull($loaded_file, 'Record exists in the database.');
+    $this->assertEqual($loaded_file->status, $file->status, 'Status was saved correctly.');
+    $this->assertEqual($saved_file->filesize, filesize($file->uri), 'File size was set correctly.', 'File');
+    $this->assertTrue($saved_file->timestamp > 1, 'File size was set correctly.', 'File');
+
+
+    // Resave the file, updating the existing record.
+    file_test_reset();
+    $saved_file->status = 7;
+    $resaved_file = file_save($saved_file);
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('load', 'update'));
+
+    $this->assertEqual($resaved_file->fid, $saved_file->fid, 'The file ID of an existing file is not changed when updating the database.', 'File');
+    $this->assertTrue($resaved_file->timestamp >= $saved_file->timestamp, "Timestamp didn't go backwards.", 'File');
+    $loaded_file = db_query('SELECT * FROM {file_managed} f WHERE f.fid = :fid', array(':fid' => $saved_file->fid))->fetch(PDO::FETCH_OBJ);
+    $this->assertNotNull($loaded_file, 'Record still exists in the database.', 'File');
+    $this->assertEqual($loaded_file->status, $saved_file->status, 'Status was saved correctly.');
+
+    // Try to insert a second file with the same name apart from case insensitivity
+    // to ensure the 'uri' index allows for filenames with different cases.
+    $file = (object) array(
+      'uid' => 1,
+      'filename' => 'DRUPLICON.txt',
+      'uri' => 'public://DRUPLICON.txt',
+      'filemime' => 'text/plain',
+      'timestamp' => 1,
+      'status' => FILE_STATUS_PERMANENT,
+    );
+    file_put_contents($file->uri, 'hello world');
+    file_save($file);
+  }
+}
+
+/**
+ * Tests file usage functions.
+ */
+class FileUsageTest extends FileTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'File usage',
+      'description' => 'Tests the file usage functions.',
+      'group' => 'File',
+    );
+  }
+
+  /**
+   * Tests file_usage_list().
+   */
+  function testGetUsage() {
+    $file = $this->createFile();
+    db_insert('file_usage')
+      ->fields(array(
+        'fid' => $file->fid,
+        'module' => 'testing',
+        'type' => 'foo',
+        'id' => 1,
+        'count' => 1
+      ))
+      ->execute();
+    db_insert('file_usage')
+      ->fields(array(
+        'fid' => $file->fid,
+        'module' => 'testing',
+        'type' => 'bar',
+        'id' => 2,
+        'count' => 2
+      ))
+      ->execute();
+
+    $usage = file_usage_list($file);
+
+    $this->assertEqual(count($usage['testing']), 2, 'Returned the correct number of items.');
+    $this->assertTrue(isset($usage['testing']['foo'][1]), 'Returned the correct id.');
+    $this->assertTrue(isset($usage['testing']['bar'][2]), 'Returned the correct id.');
+    $this->assertEqual($usage['testing']['foo'][1], 1, 'Returned the correct count.');
+    $this->assertEqual($usage['testing']['bar'][2], 2, 'Returned the correct count.');
+  }
+
+  /**
+   * Tests file_usage_add().
+   */
+  function testAddUsage() {
+    $file = $this->createFile();
+    file_usage_add($file, 'testing', 'foo', 1);
+    // Add the file twice to ensure that the count is incremented rather than
+    // creating additional records.
+    file_usage_add($file, 'testing', 'bar', 2);
+    file_usage_add($file, 'testing', 'bar', 2);
+
+    $usage = db_select('file_usage', 'f')
+      ->fields('f')
+      ->condition('f.fid', $file->fid)
+      ->execute()
+      ->fetchAllAssoc('id');
+    $this->assertEqual(count($usage), 2, 'Created two records');
+    $this->assertEqual($usage[1]->module, 'testing', 'Correct module');
+    $this->assertEqual($usage[2]->module, 'testing', 'Correct module');
+    $this->assertEqual($usage[1]->type, 'foo', 'Correct type');
+    $this->assertEqual($usage[2]->type, 'bar', 'Correct type');
+    $this->assertEqual($usage[1]->count, 1, 'Correct count');
+    $this->assertEqual($usage[2]->count, 2, 'Correct count');
+  }
+
+  /**
+   * Tests file_usage_delete().
+   */
+  function testRemoveUsage() {
+    $file = $this->createFile();
+    db_insert('file_usage')
+      ->fields(array(
+        'fid' => $file->fid,
+        'module' => 'testing',
+        'type' => 'bar',
+        'id' => 2,
+        'count' => 3,
+      ))
+      ->execute();
+
+    // Normal decrement.
+    file_usage_delete($file, 'testing', 'bar', 2);
+    $count = db_select('file_usage', 'f')
+      ->fields('f', array('count'))
+      ->condition('f.fid', $file->fid)
+      ->execute()
+      ->fetchField();
+    $this->assertEqual(2, $count, 'The count was decremented correctly.');
+
+    // Multiple decrement and removal.
+    file_usage_delete($file, 'testing', 'bar', 2, 2);
+    $count = db_select('file_usage', 'f')
+      ->fields('f', array('count'))
+      ->condition('f.fid', $file->fid)
+      ->execute()
+      ->fetchField();
+    $this->assertIdentical(FALSE, $count, 'The count was removed entirely when empty.');
+
+    // Non-existent decrement.
+    file_usage_delete($file, 'testing', 'bar', 2);
+    $count = db_select('file_usage', 'f')
+      ->fields('f', array('count'))
+      ->condition('f.fid', $file->fid)
+      ->execute()
+      ->fetchField();
+    $this->assertIdentical(FALSE, $count, 'Decrementing non-exist record complete.');
+  }
+}
+
+/**
+ * Tests the file_validate() function..
+ */
+class FileValidateTest extends FileHookTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'File validate',
+      'description' => 'Tests the file_validate() function.',
+      'group' => 'File API',
+    );
+  }
+
+  /**
+   * Test that the validators passed into are checked.
+   */
+  function testCallerValidation() {
+    $file = $this->createFile();
+
+    // Empty validators.
+    $this->assertEqual(file_validate($file, array()), array(), 'Validating an empty array works successfully.');
+    $this->assertFileHooksCalled(array('validate'));
+
+    // Use the file_test.module's test validator to ensure that passing tests
+    // return correctly.
+    file_test_reset();
+    file_test_set_return('validate', array());
+    $passing = array('file_test_validator' => array(array()));
+    $this->assertEqual(file_validate($file, $passing), array(), 'Validating passes.');
+    $this->assertFileHooksCalled(array('validate'));
+
+    // Now test for failures in validators passed in and by hook_validate.
+    file_test_reset();
+    file_test_set_return('validate', array('Epic fail'));
+    $failing = array('file_test_validator' => array(array('Failed', 'Badly')));
+    $this->assertEqual(file_validate($file, $failing), array('Failed', 'Badly', 'Epic fail'), 'Validating returns errors.');
+    $this->assertFileHooksCalled(array('validate'));
+  }
+}
+
+/**
+ *  Tests the file_save_data() function.
+ */
+class FileSaveDataTest extends FileHookTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'File save data',
+      'description' => 'Tests the file save data function.',
+      'group' => 'File API',
+    );
+  }
+
+  /**
+   * Test the file_save_data() function when no filename is provided.
+   */
+  function testWithoutFilename() {
+    $contents = $this->randomName(8);
+
+    $result = file_save_data($contents);
+    $this->assertTrue($result, 'Unnamed file saved correctly.');
+
+    $this->assertEqual(file_default_scheme(), file_uri_scheme($result->uri), "File was placed in Drupal's files directory.");
+    $this->assertEqual($result->filename, drupal_basename($result->uri), "Filename was set to the file's basename.");
+    $this->assertEqual($contents, file_get_contents($result->uri), 'Contents of the file are correct.');
+    $this->assertEqual($result->filemime, 'application/octet-stream', 'A MIME type was set.');
+    $this->assertEqual($result->status, FILE_STATUS_PERMANENT, "The file's status was set to permanent.");
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('insert'));
+
+    // Verify that what was returned is what's in the database.
+    $this->assertFileUnchanged($result, file_load($result->fid, TRUE));
+  }
+
+  /**
+   * Test the file_save_data() function when a filename is provided.
+   */
+  function testWithFilename() {
+    $contents = $this->randomName(8);
+
+    // Using filename with non-latin characters.
+    $filename = 'Текстовый файл.txt';
+
+    $result = file_save_data($contents, 'public://' . $filename);
+    $this->assertTrue($result, 'Unnamed file saved correctly.');
+
+    $this->assertEqual('public', file_uri_scheme($result->uri), "File was placed in Drupal's files directory.");
+    $this->assertEqual($filename, drupal_basename($result->uri), 'File was named correctly.');
+    $this->assertEqual($contents, file_get_contents($result->uri), 'Contents of the file are correct.');
+    $this->assertEqual($result->filemime, 'text/plain', 'A MIME type was set.');
+    $this->assertEqual($result->status, FILE_STATUS_PERMANENT, "The file's status was set to permanent.");
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('insert'));
+
+    // Verify that what was returned is what's in the database.
+    $this->assertFileUnchanged($result, file_load($result->fid, TRUE));
+  }
+
+  /**
+   * Test file_save_data() when renaming around an existing file.
+   */
+  function testExistingRename() {
+    // Setup a file to overwrite.
+    $existing = $this->createFile();
+    $contents = $this->randomName(8);
+
+    $result = file_save_data($contents, $existing->uri, FILE_EXISTS_RENAME);
+    $this->assertTrue($result, 'File saved successfully.');
+
+    $this->assertEqual('public', file_uri_scheme($result->uri), "File was placed in Drupal's files directory.");
+    $this->assertEqual($result->filename, $existing->filename, 'Filename was set to the basename of the source, rather than that of the renamed file.');
+    $this->assertEqual($contents, file_get_contents($result->uri), 'Contents of the file are correct.');
+    $this->assertEqual($result->filemime, 'application/octet-stream', 'A MIME type was set.');
+    $this->assertEqual($result->status, FILE_STATUS_PERMANENT, "The file's status was set to permanent.");
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('insert'));
+
+    // Ensure that the existing file wasn't overwritten.
+    $this->assertDifferentFile($existing, $result);
+    $this->assertFileUnchanged($existing, file_load($existing->fid, TRUE));
+
+    // Verify that was returned is what's in the database.
+    $this->assertFileUnchanged($result, file_load($result->fid, TRUE));
+  }
+
+  /**
+   * Test file_save_data() when replacing an existing file.
+   */
+  function testExistingReplace() {
+    // Setup a file to overwrite.
+    $existing = $this->createFile();
+    $contents = $this->randomName(8);
+
+    $result = file_save_data($contents, $existing->uri, FILE_EXISTS_REPLACE);
+    $this->assertTrue($result, 'File saved successfully.');
+
+    $this->assertEqual('public', file_uri_scheme($result->uri), "File was placed in Drupal's files directory.");
+    $this->assertEqual($result->filename, $existing->filename, 'Filename was set to the basename of the existing file, rather than preserving the original name.');
+    $this->assertEqual($contents, file_get_contents($result->uri), 'Contents of the file are correct.');
+    $this->assertEqual($result->filemime, 'application/octet-stream', 'A MIME type was set.');
+    $this->assertEqual($result->status, FILE_STATUS_PERMANENT, "The file's status was set to permanent.");
+
+    // Check that the correct hooks were called.
+    $this->assertFileHooksCalled(array('load', 'update'));
+
+    // Verify that the existing file was re-used.
+    $this->assertSameFile($existing, $result);
+
+    // Verify that what was returned is what's in the database.
+    $this->assertFileUnchanged($result, file_load($result->fid, TRUE));
+  }
+
+  /**
+   * Test that file_save_data() fails overwriting an existing file.
+   */
+  function testExistingError() {
+    $contents = $this->randomName(8);
+    $existing = $this->createFile(NULL, $contents);
+
+    // Check the overwrite error.
+    $result = file_save_data('asdf', $existing->uri, FILE_EXISTS_ERROR);
+    $this->assertFalse($result, 'Overwriting a file fails when FILE_EXISTS_ERROR is specified.');
+    $this->assertEqual($contents, file_get_contents($existing->uri), 'Contents of existing file were unchanged.');
+
+    // Check that no hooks were called while failing.
+    $this->assertFileHooksCalled(array());
+
+    // Ensure that the existing file wasn't overwritten.
+    $this->assertFileUnchanged($existing, file_load($existing->fid, TRUE));
+  }
+}
+
+/**
+ * Tests for download/file transfer functions.
+ */
+class FileDownloadTest extends FileTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'File download',
+      'description' => 'Tests for file download/transfer functions.',
+      'group' => 'File API',
+    );
+  }
+
+  function setUp() {
+    parent::setUp('file_test');
+    // Clear out any hook calls.
+    file_test_reset();
+  }
+
+  /**
+   * Test the public file transfer system.
+   */
+  function testPublicFileTransfer() {
+    // Test generating an URL to a created file.
+    $file = $this->createFile();
+    $url = file_create_url($file->uri);
+    // URLs can't contain characters outside the ASCII set so $filename has to be
+    // encoded.
+    $filename = $GLOBALS['base_url'] . '/' . file_stream_wrapper_get_instance_by_scheme('public')->getDirectoryPath() . '/' . rawurlencode($file->filename);
+    $this->assertEqual($filename, $url, 'Correctly generated a URL for a created file.');
+    $this->drupalHead($url);
+    $this->assertResponse(200, 'Confirmed that the generated URL is correct by downloading the created file.');
+
+    // Test generating an URL to a shipped file (i.e. a file that is part of
+    // Drupal core, a module or a theme, for example a JavaScript file).
+    $filepath = 'misc/jquery.js';
+    $url = file_create_url($filepath);
+    $this->assertEqual($GLOBALS['base_url'] . '/' . $filepath, $url, 'Correctly generated a URL for a shipped file.');
+    $this->drupalHead($url);
+    $this->assertResponse(200, 'Confirmed that the generated URL is correct by downloading the shipped file.');
+  }
+
+  /**
+   * Test the private file transfer system.
+   */
+  function testPrivateFileTransfer() {
+    // Set file downloads to private so handler functions get called.
+
+    // Create a file.
+    $contents = $this->randomName(8);
+    $file = $this->createFile(NULL, $contents, 'private');
+    $url  = file_create_url($file->uri);
+
+    // Set file_test access header to allow the download.
+    file_test_set_return('download', array('x-foo' => 'Bar'));
+    $this->drupalGet($url);
+    $headers = $this->drupalGetHeaders();
+    $this->assertEqual($headers['x-foo'], 'Bar', 'Found header set by file_test module on private download.');
+    $this->assertResponse(200, 'Correctly allowed access to a file when file_test provides headers.');
+
+    // Test that the file transferred correctly.
+    $this->assertEqual($contents, $this->content, 'Contents of the file are correct.');
+
+    // Deny access to all downloads via a -1 header.
+    file_test_set_return('download', -1);
+    $this->drupalHead($url);
+    $this->assertResponse(403, 'Correctly denied access to a file when file_test sets the header to -1.');
+
+    // Try non-existent file.
+    $url = file_create_url('private://' . $this->randomName());
+    $this->drupalHead($url);
+    $this->assertResponse(404, 'Correctly returned 404 response for a non-existent file.');
+  }
+
+  /**
+   * Test file_create_url().
+   */
+  function testFileCreateUrl() {
+    global $base_url;
+
+    // Tilde (~) is excluded from this test because it is encoded by
+    // rawurlencode() in PHP 5.2 but not in PHP 5.3, as per RFC 3986.
+    // @see http://www.php.net/manual/en/function.rawurlencode.php#86506
+    $basename = " -._!$'\"()*@[]?&+%#,;=:\n\x00" . // "Special" ASCII characters.
+      "%23%25%26%2B%2F%3F" . // Characters that look like a percent-escaped string.
+      "éøïвβ中國書۞"; // Characters from various non-ASCII alphabets.
+    $basename_encoded = '%20-._%21%24%27%22%28%29%2A%40%5B%5D%3F%26%2B%25%23%2C%3B%3D%3A__' .
+      '%2523%2525%2526%252B%252F%253F' .
+      '%C3%A9%C3%B8%C3%AF%D0%B2%CE%B2%E4%B8%AD%E5%9C%8B%E6%9B%B8%DB%9E';
+
+    $this->checkUrl('public', '', $basename, $base_url . '/' . file_stream_wrapper_get_instance_by_scheme('public')->getDirectoryPath() . '/' . $basename_encoded);
+    $this->checkUrl('private', '', $basename, $base_url . '/system/files/' . $basename_encoded);
+    $this->checkUrl('private', '', $basename, $base_url . '/?q=system/files/' . $basename_encoded, '0');
+  }
+
+  /**
+   * Download a file from the URL generated by file_create_url().
+   *
+   * Create a file with the specified scheme, directory and filename; check that
+   * the URL generated by file_create_url() for the specified file equals the
+   * specified URL; fetch the URL and then compare the contents to the file.
+   *
+   * @param $scheme
+   *   A scheme, e.g. "public"
+   * @param $directory
+   *   A directory, possibly ""
+   * @param $filename
+   *   A filename
+   * @param $expected_url
+   *   The expected URL
+   * @param $clean_url
+   *   The value of the clean_url setting
+   */
+  private function checkUrl($scheme, $directory, $filename, $expected_url, $clean_url = '1') {
+    variable_set('clean_url', $clean_url);
+
+    // Convert $filename to a valid filename, i.e. strip characters not
+    // supported by the filesystem, and create the file in the specified
+    // directory.
+    $filepath = file_create_filename($filename, $directory);
+    $directory_uri = $scheme . '://' . dirname($filepath);
+    file_prepare_directory($directory_uri, FILE_CREATE_DIRECTORY);
+    $file = $this->createFile($filepath, NULL, $scheme);
+
+    $url = file_create_url($file->uri);
+    $this->assertEqual($url, $expected_url, 'Generated URL matches expected URL.');
+
+    if ($scheme == 'private') {
+      // Tell the implementation of hook_file_download() in file_test.module
+      // that this file may be downloaded.
+      file_test_set_return('download', array('x-foo' => 'Bar'));
+    }
+
+    $this->drupalGet($url);
+    if ($this->assertResponse(200) == 'pass') {
+      $this->assertRaw(file_get_contents($file->uri), 'Contents of the file are correct.');
+    }
+
+    file_delete($file);
+  }
+}
+
+/**
+ * Tests for file URL rewriting.
+ */
+class FileURLRewritingTest extends FileTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'File URL rewriting',
+      'description' => 'Tests for file URL rewriting.',
+      'group' => 'File',
+    );
+  }
+
+  function setUp() {
+    parent::setUp('file_test');
+  }
+
+  /**
+   * Test the generating of rewritten shipped file URLs.
+   */
+  function testShippedFileURL()  {
+    // Test generating an URL to a shipped file (i.e. a file that is part of
+    // Drupal core, a module or a theme, for example a JavaScript file).
+
+    // Test alteration of file URLs to use a CDN.
+    variable_set('file_test_hook_file_url_alter', 'cdn');
+    $filepath = 'misc/jquery.js';
+    $url = file_create_url($filepath);
+    $this->assertEqual(FILE_URL_TEST_CDN_1 . '/' . $filepath, $url, 'Correctly generated a CDN URL for a shipped file.');
+    $filepath = 'misc/favicon.ico';
+    $url = file_create_url($filepath);
+    $this->assertEqual(FILE_URL_TEST_CDN_2 . '/' . $filepath, $url, 'Correctly generated a CDN URL for a shipped file.');
+
+    // Test alteration of file URLs to use root-relative URLs.
+    variable_set('file_test_hook_file_url_alter', 'root-relative');
+    $filepath = 'misc/jquery.js';
+    $url = file_create_url($filepath);
+    $this->assertEqual(base_path() . '/' . $filepath, $url, 'Correctly generated a root-relative URL for a shipped file.');
+    $filepath = 'misc/favicon.ico';
+    $url = file_create_url($filepath);
+    $this->assertEqual(base_path() . '/' . $filepath, $url, 'Correctly generated a root-relative URL for a shipped file.');
+
+    // Test alteration of file URLs to use protocol-relative URLs.
+    variable_set('file_test_hook_file_url_alter', 'protocol-relative');
+    $filepath = 'misc/jquery.js';
+    $url = file_create_url($filepath);
+    $this->assertEqual('/' . base_path() . '/' . $filepath, $url, 'Correctly generated a protocol-relative URL for a shipped file.');
+    $filepath = 'misc/favicon.ico';
+    $url = file_create_url($filepath);
+    $this->assertEqual('/' . base_path() . '/' . $filepath, $url, 'Correctly generated a protocol-relative URL for a shipped file.');
+  }
+
+  /**
+   * Test the generating of rewritten public created file URLs.
+   */
+  function testPublicCreatedFileURL() {
+    // Test generating an URL to a created file.
+
+    // Test alteration of file URLs to use a CDN.
+    variable_set('file_test_hook_file_url_alter', 'cdn');
+    $file = $this->createFile();
+    $url = file_create_url($file->uri);
+    $public_directory_path = file_stream_wrapper_get_instance_by_scheme('public')->getDirectoryPath();
+    $this->assertEqual(FILE_URL_TEST_CDN_2 . '/' . $public_directory_path . '/' . $file->filename, $url, 'Correctly generated a CDN URL for a created file.');
+
+    // Test alteration of file URLs to use root-relative URLs.
+    variable_set('file_test_hook_file_url_alter', 'root-relative');
+    $file = $this->createFile();
+    $url = file_create_url($file->uri);
+    $this->assertEqual(base_path() . '/' . $public_directory_path . '/' . $file->filename, $url, 'Correctly generated a root-relative URL for a created file.');
+
+    // Test alteration of file URLs to use a protocol-relative URLs.
+    variable_set('file_test_hook_file_url_alter', 'protocol-relative');
+    $file = $this->createFile();
+    $url = file_create_url($file->uri);
+    $this->assertEqual('/' . base_path() . '/' . $public_directory_path . '/' . $file->filename, $url, 'Correctly generated a protocol-relative URL for a created file.');
+  }
+}
+
+/**
+ * Tests for file_munge_filename() and file_unmunge_filename().
+ */
+class FileNameMungingTest extends FileTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'File naming',
+      'description' => 'Test filename munging and unmunging.',
+      'group' => 'File API',
+    );
+  }
+
+  function setUp() {
+    parent::setUp();
+    $this->bad_extension = 'php';
+    $this->name = $this->randomName() . '.' . $this->bad_extension . '.txt';
+    $this->name_with_uc_ext = $this->randomName() . '.' . strtoupper($this->bad_extension) . '.txt';
+  }
+
+  /**
+   * Create a file and munge/unmunge the name.
+   */
+  function testMunging() {
+    // Disable insecure uploads.
+    variable_set('allow_insecure_uploads', 0);
+    $munged_name = file_munge_filename($this->name, '', TRUE);
+    $messages = drupal_get_messages();
+    $this->assertTrue(in_array(t('For security reasons, your upload has been renamed to %filename.', array('%filename' => $munged_name)), $messages['status']), 'Alert properly set when a file is renamed.');
+    $this->assertNotEqual($munged_name, $this->name, format_string('The new filename (%munged) has been modified from the original (%original)', array('%munged' => $munged_name, '%original' => $this->name)));
+  }
+
+  /**
+   * Tests munging with a null byte in the filename.
+   */
+  function testMungeNullByte() {
+    $prefix = $this->randomName();
+    $filename = $prefix . '.' . $this->bad_extension . "\0.txt";
+    $this->assertEqual(file_munge_filename($filename, ''), $prefix . '.' . $this->bad_extension . '_.txt', 'A filename with a null byte is correctly munged to remove the null byte.');
+  }
+
+  /**
+   * If the allow_insecure_uploads variable evaluates to true, the file should
+   * come out untouched, no matter how evil the filename.
+   */
+  function testMungeIgnoreInsecure() {
+    variable_set('allow_insecure_uploads', 1);
+    $munged_name = file_munge_filename($this->name, '');
+    $this->assertIdentical($munged_name, $this->name, format_string('The original filename (%original) matches the munged filename (%munged) when insecure uploads are enabled.', array('%munged' => $munged_name, '%original' => $this->name)));
+  }
+
+  /**
+   * White listed extensions are ignored by file_munge_filename().
+   */
+  function testMungeIgnoreWhitelisted() {
+    // Declare our extension as whitelisted. The declared extensions should
+    // be case insensitive so test using one with a different case.
+    $munged_name = file_munge_filename($this->name_with_uc_ext, $this->bad_extension);
+    $this->assertIdentical($munged_name, $this->name_with_uc_ext, format_string('The new filename (%munged) matches the original (%original) once the extension has been whitelisted.', array('%munged' => $munged_name, '%original' => $this->name_with_uc_ext)));
+    // The allowed extensions should also be normalized.
+    $munged_name = file_munge_filename($this->name, strtoupper($this->bad_extension));
+    $this->assertIdentical($munged_name, $this->name, format_string('The new filename (%munged) matches the original (%original) also when the whitelisted extension is in uppercase.', array('%munged' => $munged_name, '%original' => $this->name)));
+  }
+
+  /**
+   * Ensure that unmunge gets your name back.
+   */
+  function testUnMunge() {
+    $munged_name = file_munge_filename($this->name, '', FALSE);
+    $unmunged_name = file_unmunge_filename($munged_name);
+    $this->assertIdentical($unmunged_name, $this->name, format_string('The unmunged (%unmunged) filename matches the original (%original)', array('%unmunged' => $unmunged_name, '%original' => $this->name)));
+  }
+}
+
+/**
+ * Tests for file_get_mimetype().
+ */
+class FileMimeTypeTest extends DrupalWebTestCase {
+  function setUp() {
+    parent::setUp('file_test');
+  }
+
+  public static function getInfo() {
+    return array(
+      'name' => 'File mimetypes',
+      'description' => 'Test filename mimetype detection.',
+      'group' => 'File API',
+    );
+  }
+
+  /**
+   * Test mapping of mimetypes from filenames.
+   */
+  public function testFileMimeTypeDetection() {
+    $prefix = 'public://';
+
+    $test_case = array(
+      'test.jar' => 'application/java-archive',
+      'test.jpeg' => 'image/jpeg',
+      'test.JPEG' => 'image/jpeg',
+      'test.jpg' => 'image/jpeg',
+      'test.jar.jpg' => 'image/jpeg',
+      'test.jpg.jar' => 'application/java-archive',
+      'test.pcf.Z' => 'application/x-font',
+      'pcf.z' => 'application/octet-stream',
+      'jar' => 'application/octet-stream',
+      'some.junk' => 'application/octet-stream',
+      'foo.file_test_1' => 'madeup/file_test_1',
+      'foo.file_test_2' => 'madeup/file_test_2',
+      'foo.doc' => 'madeup/doc',
+      'test.ogg' => 'audio/ogg',
+    );
+
+    // Test using default mappings.
+    foreach ($test_case as $input => $expected) {
+      // Test stream [URI].
+      $output = file_get_mimetype($prefix . $input);
+      $this->assertIdentical($output, $expected, format_string('Mimetype for %input is %output (expected: %expected).', array('%input' => $input, '%output' => $output, '%expected' => $expected)));
+
+      // Test normal path equivalent
+      $output = file_get_mimetype($input);
+      $this->assertIdentical($output, $expected, format_string('Mimetype (using default mappings) for %input is %output (expected: %expected).', array('%input' => $input, '%output' => $output, '%expected' => $expected)));
+    }
+
+    // Now test passing in the map.
+    $mapping = array(
+      'mimetypes' => array(
+        0 => 'application/java-archive',
+        1 => 'image/jpeg',
+      ),
+      'extensions' => array(
+         'jar' => 0,
+         'jpg' => 1,
+      )
+    );
+
+    $test_case = array(
+      'test.jar' => 'application/java-archive',
+      'test.jpeg' => 'application/octet-stream',
+      'test.jpg' => 'image/jpeg',
+      'test.jar.jpg' => 'image/jpeg',
+      'test.jpg.jar' => 'application/java-archive',
+      'test.pcf.z' => 'application/octet-stream',
+      'pcf.z' => 'application/octet-stream',
+      'jar' => 'application/octet-stream',
+      'some.junk' => 'application/octet-stream',
+      'foo.file_test_1' => 'application/octet-stream',
+      'foo.file_test_2' => 'application/octet-stream',
+      'foo.doc' => 'application/octet-stream',
+      'test.ogg' => 'application/octet-stream',
+    );
+
+    foreach ($test_case as $input => $expected) {
+      $output = file_get_mimetype($input, $mapping);
+      $this->assertIdentical($output, $expected, format_string('Mimetype (using passed-in mappings) for %input is %output (expected: %expected).', array('%input' => $input, '%output' => $output, '%expected' => $expected)));
+    }
+  }
+}
+
+/**
+ * Tests stream wrapper functions.
+ */
+class StreamWrapperTest extends DrupalWebTestCase {
+
+  protected $scheme = 'dummy';
+  protected $classname = 'DrupalDummyStreamWrapper';
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Stream wrappers',
+      'description' => 'Tests stream wrapper functions.',
+      'group' => 'File API',
+    );
+  }
+
+  function setUp() {
+    parent::setUp('file_test');
+    drupal_static_reset('file_get_stream_wrappers');
+  }
+
+  function tearDown() {
+    parent::tearDown();
+    stream_wrapper_unregister($this->scheme);
+  }
+
+  /**
+   * Test the getClassName() function.
+   */
+  function testGetClassName() {
+    // Check the dummy scheme.
+    $this->assertEqual($this->classname, file_stream_wrapper_get_class($this->scheme), 'Got correct class name for dummy scheme.');
+    // Check core's scheme.
+    $this->assertEqual('DrupalPublicStreamWrapper', file_stream_wrapper_get_class('public'), 'Got correct class name for public scheme.');
+  }
+
+  /**
+   * Test the file_stream_wrapper_get_instance_by_scheme() function.
+   */
+  function testGetInstanceByScheme() {
+    $instance = file_stream_wrapper_get_instance_by_scheme($this->scheme);
+    $this->assertEqual($this->classname, get_class($instance), 'Got correct class type for dummy scheme.');
+
+    $instance = file_stream_wrapper_get_instance_by_scheme('public');
+    $this->assertEqual('DrupalPublicStreamWrapper', get_class($instance), 'Got correct class type for public scheme.');
+  }
+
+  /**
+   * Test the URI and target functions.
+   */
+  function testUriFunctions() {
+    $instance = file_stream_wrapper_get_instance_by_uri($this->scheme . '://foo');
+    $this->assertEqual($this->classname, get_class($instance), 'Got correct class type for dummy URI.');
+
+    $instance = file_stream_wrapper_get_instance_by_uri('public://foo');
+    $this->assertEqual('DrupalPublicStreamWrapper', get_class($instance), 'Got correct class type for public URI.');
+
+    // Test file_uri_target().
+    $this->assertEqual(file_uri_target('public://foo/bar.txt'), 'foo/bar.txt', 'Got a valid stream target from public://foo/bar.txt.');
+    $this->assertFalse(file_uri_target('foo/bar.txt'), 'foo/bar.txt is not a valid stream.');
+
+    // Test file_build_uri() and DrupalLocalStreamWrapper::getDirectoryPath().
+    $this->assertEqual(file_build_uri('foo/bar.txt'), 'public://foo/bar.txt', 'Expected scheme was added.');
+    $this->assertEqual(file_stream_wrapper_get_instance_by_scheme('public')->getDirectoryPath(), variable_get('file_public_path'), 'Expected default directory path was returned.');
+    $this->assertEqual(file_stream_wrapper_get_instance_by_scheme('temporary')->getDirectoryPath(), variable_get('file_temporary_path'), 'Expected temporary directory path was returned.');
+
+    variable_set('file_default_scheme', 'private');
+    $this->assertEqual(file_build_uri('foo/bar.txt'), 'private://foo/bar.txt', 'Got a valid URI from foo/bar.txt.');
+  }
+
+  /**
+   * Test the scheme functions.
+   */
+  function testGetValidStreamScheme() {
+    $this->assertEqual('foo', file_uri_scheme('foo://pork//chops'), 'Got the correct scheme from foo://asdf');
+    $this->assertTrue(file_stream_wrapper_valid_scheme(file_uri_scheme('public://asdf')), 'Got a valid stream scheme from public://asdf');
+    $this->assertFalse(file_stream_wrapper_valid_scheme(file_uri_scheme('foo://asdf')), 'Did not get a valid stream scheme from foo://asdf');
+  }
+}