diff -r 07239de796bb -r e756a8c72c3d cms/drupal/modules/simpletest/tests/ajax.test
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cms/drupal/modules/simpletest/tests/ajax.test	Fri Sep 08 12:04:06 2017 +0200
@@ -0,0 +1,617 @@
+<?php
+
+class AJAXTestCase extends DrupalWebTestCase {
+  function setUp() {
+    $modules = func_get_args();
+    if (isset($modules[0]) && is_array($modules[0])) {
+      $modules = $modules[0];
+    }
+    parent::setUp(array_unique(array_merge(array('ajax_test', 'ajax_forms_test'), $modules)));
+  }
+
+  /**
+   * Assert that a command with the required properties exists within the array of Ajax commands returned by the server.
+   *
+   * The Ajax framework, via the ajax_deliver() and ajax_render() functions,
+   * returns an array of commands. This array sometimes includes commands
+   * automatically provided by the framework in addition to commands returned by
+   * a particular page callback. During testing, we're usually interested that a
+   * particular command is present, and don't care whether other commands
+   * precede or follow the one we're interested in. Additionally, the command
+   * we're interested in may include additional data that we're not interested
+   * in. Therefore, this function simply asserts that one of the commands in
+   * $haystack contains all of the keys and values in $needle. Furthermore, if
+   * $needle contains a 'settings' key with an array value, we simply assert
+   * that all keys and values within that array are present in the command we're
+   * checking, and do not consider it a failure if the actual command contains
+   * additional settings that aren't part of $needle.
+   *
+   * @param $haystack
+   *   An array of Ajax commands returned by the server.
+   * @param $needle
+   *   Array of info we're expecting in one of those commands.
+   * @param $message
+   *   An assertion message.
+   */
+  protected function assertCommand($haystack, $needle, $message) {
+    $found = FALSE;
+    foreach ($haystack as $command) {
+      // If the command has additional settings that we're not testing for, do
+      // not consider that a failure.
+      if (isset($command['settings']) && is_array($command['settings']) && isset($needle['settings']) && is_array($needle['settings'])) {
+        $command['settings'] = array_intersect_key($command['settings'], $needle['settings']);
+      }
+      // If the command has additional data that we're not testing for, do not
+      // consider that a failure. Also, == instead of ===, because we don't
+      // require the key/value pairs to be in any particular order
+      // (http://www.php.net/manual/en/language.operators.array.php).
+      if (array_intersect_key($command, $needle) == $needle) {
+        $found = TRUE;
+        break;
+      }
+    }
+    $this->assertTrue($found, $message);
+  }
+}
+
+/**
+ * Tests primary Ajax framework functions.
+ */
+class AJAXFrameworkTestCase extends AJAXTestCase {
+  protected $profile = 'testing';
+
+  public static function getInfo() {
+    return array(
+      'name' => 'AJAX framework',
+      'description' => 'Performs tests on AJAX framework functions.',
+      'group' => 'AJAX',
+    );
+  }
+
+  /**
+   * Test that ajax_render() returns JavaScript settings generated during the page request.
+   *
+   * @todo Add tests to ensure that ajax_render() returns commands for new CSS
+   *   and JavaScript files to be loaded by the page. See
+   *   http://drupal.org/node/561858.
+   */
+  function testAJAXRender() {
+    $commands = $this->drupalGetAJAX('ajax-test/render');
+
+    // Verify that there is a command to load settings added with
+    // drupal_add_js().
+    $expected = array(
+      'command' => 'settings',
+      'settings' => array('basePath' => base_path(), 'ajax' => 'test'),
+    );
+    $this->assertCommand($commands, $expected, t('ajax_render() loads settings added with drupal_add_js().'));
+
+    // Verify that Ajax settings are loaded for #type 'link'.
+    $this->drupalGet('ajax-test/link');
+    $settings = $this->drupalGetSettings();
+    $this->assertEqual($settings['ajax']['ajax-link']['url'], url('filter/tips'));
+    $this->assertEqual($settings['ajax']['ajax-link']['wrapper'], 'block-system-main');
+  }
+
+  /**
+   * Test behavior of ajax_render_error().
+   */
+  function testAJAXRenderError() {
+    // Verify default error message.
+    $commands = $this->drupalGetAJAX('ajax-test/render-error');
+    $expected = array(
+      'command' => 'alert',
+      'text' => t('An error occurred while handling the request: The server received invalid input.'),
+    );
+    $this->assertCommand($commands, $expected, t('ajax_render_error() invokes alert command.'));
+
+    // Verify custom error message.
+    $edit = array(
+      'message' => 'Custom error message.',
+    );
+    $commands = $this->drupalGetAJAX('ajax-test/render-error', array('query' => $edit));
+    $expected = array(
+      'command' => 'alert',
+      'text' => $edit['message'],
+    );
+     $this->assertCommand($commands, $expected, t('Custom error message is output.'));
+  }
+
+  /**
+   * Test that new JavaScript and CSS files added during an AJAX request are returned.
+   */
+  function testLazyLoad() {
+    $expected = array(
+      'setting_name' => 'ajax_forms_test_lazy_load_form_submit',
+      'setting_value' => 'executed',
+      'css' => drupal_get_path('module', 'system') . '/system.admin.css',
+      'js' => drupal_get_path('module', 'system') . '/system.js',
+    );
+    // @todo D8: Add a drupal_css_defaults() helper function.
+    $expected_css_html = drupal_get_css(array($expected['css'] => array(
+      'type' => 'file',
+      'group' => CSS_DEFAULT,
+      'weight' => 0,
+      'every_page' => FALSE,
+      'media' => 'all',
+      'preprocess' => TRUE,
+      'data' => $expected['css'],
+      'browsers' => array('IE' => TRUE, '!IE' => TRUE),
+    )), TRUE);
+    $expected_js_html = drupal_get_js('header', array($expected['js'] => drupal_js_defaults($expected['js'])), TRUE);
+
+    // Get the base page.
+    $this->drupalGet('ajax_forms_test_lazy_load_form');
+    $original_settings = $this->drupalGetSettings();
+    $original_css = $original_settings['ajaxPageState']['css'];
+    $original_js = $original_settings['ajaxPageState']['js'];
+
+    // Verify that the base page doesn't have the settings and files that are to
+    // be lazy loaded as part of the next requests.
+    $this->assertTrue(!isset($original_settings[$expected['setting_name']]), t('Page originally lacks the %setting, as expected.', array('%setting' => $expected['setting_name'])));
+    $this->assertTrue(!isset($original_settings[$expected['css']]), t('Page originally lacks the %css file, as expected.', array('%css' => $expected['css'])));
+    $this->assertTrue(!isset($original_settings[$expected['js']]), t('Page originally lacks the %js file, as expected.', array('%js' => $expected['js'])));
+
+    // Submit the AJAX request without triggering files getting added.
+    $commands = $this->drupalPostAJAX(NULL, array('add_files' => FALSE), array('op' => t('Submit')));
+    $new_settings = $this->drupalGetSettings();
+
+    // Verify the setting was not added when not expected.
+    $this->assertTrue(!isset($new_settings['setting_name']), t('Page still lacks the %setting, as expected.', array('%setting' => $expected['setting_name'])));
+    // Verify a settings command does not add CSS or scripts to Drupal.settings
+    // and no command inserts the corresponding tags on the page.
+    $found_settings_command = FALSE;
+    $found_markup_command = FALSE;
+    foreach ($commands as $command) {
+      if ($command['command'] == 'settings' && (array_key_exists('css', $command['settings']['ajaxPageState']) || array_key_exists('js', $command['settings']['ajaxPageState']))) {
+        $found_settings_command = TRUE;
+      }
+      if (isset($command['data']) && ($command['data'] == $expected_js_html || $command['data'] == $expected_css_html)) {
+        $found_markup_command = TRUE;
+      }
+    }
+    $this->assertFalse($found_settings_command, t('Page state still lacks the %css and %js files, as expected.', array('%css' => $expected['css'], '%js' => $expected['js'])));
+    $this->assertFalse($found_markup_command, t('Page still lacks the %css and %js files, as expected.', array('%css' => $expected['css'], '%js' => $expected['js'])));
+
+    // Submit the AJAX request and trigger adding files.
+    $commands = $this->drupalPostAJAX(NULL, array('add_files' => TRUE), array('op' => t('Submit')));
+    $new_settings = $this->drupalGetSettings();
+    $new_css = $new_settings['ajaxPageState']['css'];
+    $new_js = $new_settings['ajaxPageState']['js'];
+
+    // Verify the expected setting was added.
+    $this->assertIdentical($new_settings[$expected['setting_name']], $expected['setting_value'], t('Page now has the %setting.', array('%setting' => $expected['setting_name'])));
+
+    // Verify the expected CSS file was added, both to Drupal.settings, and as
+    // an AJAX command for inclusion into the HTML.
+    $this->assertEqual($new_css, $original_css + array($expected['css'] => 1), t('Page state now has the %css file.', array('%css' => $expected['css'])));
+    $this->assertCommand($commands, array('data' => $expected_css_html), t('Page now has the %css file.', array('%css' => $expected['css'])));
+
+    // Verify the expected JS file was added, both to Drupal.settings, and as
+    // an AJAX command for inclusion into the HTML. By testing for an exact HTML
+    // string containing the SCRIPT tag, we also ensure that unexpected
+    // JavaScript code, such as a jQuery.extend() that would potentially clobber
+    // rather than properly merge settings, didn't accidentally get added.
+    $this->assertEqual($new_js, $original_js + array($expected['js'] => 1), t('Page state now has the %js file.', array('%js' => $expected['js'])));
+    $this->assertCommand($commands, array('data' => $expected_js_html), t('Page now has the %js file.', array('%js' => $expected['js'])));
+  }
+
+  /**
+   * Tests that overridden CSS files are not added during lazy load.
+   */
+  function testLazyLoadOverriddenCSS() {
+    // The test theme overrides system.base.css without an implementation,
+    // thereby removing it.
+    theme_enable(array('test_theme'));
+    variable_set('theme_default', 'test_theme');
+
+    // This gets the form, and emulates an Ajax submission on it, including
+    // adding markup to the HEAD and BODY for any lazy loaded JS/CSS files.
+    $this->drupalPostAJAX('ajax_forms_test_lazy_load_form', array('add_files' => TRUE), array('op' => t('Submit')));
+
+    // Verify that the resulting HTML does not load the overridden CSS file.
+    // We add a "?" to the assertion, because Drupal.settings may include
+    // information about the file; we only really care about whether it appears
+    // in a LINK or STYLE tag, for which Drupal always adds a query string for
+    // cache control.
+    $this->assertNoText('system.base.css?', 'Ajax lazy loading does not add overridden CSS files.');
+  }
+}
+
+/**
+ * Tests Ajax framework commands.
+ */
+class AJAXCommandsTestCase extends AJAXTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'AJAX commands',
+      'description' => 'Performs tests on AJAX framework commands.',
+      'group' => 'AJAX',
+    );
+  }
+
+  /**
+   * Test the various Ajax Commands.
+   */
+  function testAJAXCommands() {
+    $form_path = 'ajax_forms_test_ajax_commands_form';
+    $web_user = $this->drupalCreateUser(array('access content'));
+    $this->drupalLogin($web_user);
+
+    $edit = array();
+
+    // Tests the 'after' command.
+    $commands = $this->drupalPostAJAX($form_path, $edit, array('op' => t("AJAX 'After': Click to put something after the div")));
+    $expected = array(
+      'command' => 'insert',
+      'method' => 'after',
+      'data' => 'This will be placed after',
+    );
+    $this->assertCommand($commands, $expected, "'after' AJAX command issued with correct data");
+
+    // Tests the 'alert' command.
+    $commands = $this->drupalPostAJAX($form_path, $edit, array('op' => t("AJAX 'Alert': Click to alert")));
+    $expected = array(
+      'command' => 'alert',
+      'text' => 'Alert',
+    );
+    $this->assertCommand($commands, $expected, "'alert' AJAX Command issued with correct text");
+
+    // Tests the 'append' command.
+    $commands = $this->drupalPostAJAX($form_path, $edit, array('op' => t("AJAX 'Append': Click to append something")));
+    $expected = array(
+      'command' => 'insert',
+      'method' => 'append',
+      'data' => 'Appended text',
+    );
+    $this->assertCommand($commands, $expected, "'append' AJAX command issued with correct data");
+
+    // Tests the 'before' command.
+    $commands = $this->drupalPostAJAX($form_path, $edit, array('op' => t("AJAX 'before': Click to put something before the div")));
+    $expected = array(
+      'command' => 'insert',
+      'method' => 'before',
+      'data' => 'Before text',
+    );
+    $this->assertCommand($commands, $expected, "'before' AJAX command issued with correct data");
+
+    // Tests the 'changed' command.
+    $commands = $this->drupalPostAJAX($form_path, $edit, array('op' => t("AJAX changed: Click to mark div changed.")));
+    $expected = array(
+      'command' => 'changed',
+      'selector' => '#changed_div',
+    );
+    $this->assertCommand($commands, $expected, "'changed' AJAX command issued with correct selector");
+
+    // Tests the 'changed' command using the second argument.
+    $commands = $this->drupalPostAJAX($form_path, $edit, array('op' => t("AJAX changed: Click to mark div changed with asterisk.")));
+    $expected = array(
+      'command' => 'changed',
+      'selector' => '#changed_div',
+      'asterisk' => '#changed_div_mark_this',
+    );
+    $this->assertCommand($commands, $expected, "'changed' AJAX command (with asterisk) issued with correct selector");
+
+    // Tests the 'css' command.
+    $commands = $this->drupalPostAJAX($form_path, $edit, array('op' => t("Set the '#box' div to be blue.")));
+    $expected = array(
+      'command' => 'css',
+      'selector' => '#css_div',
+      'argument' => array('background-color' => 'blue'),
+    );
+    $this->assertCommand($commands, $expected, "'css' AJAX command issued with correct selector");
+
+    // Tests the 'data' command.
+    $commands = $this->drupalPostAJAX($form_path, $edit, array('op' => t("AJAX data command: Issue command.")));
+    $expected = array(
+      'command' => 'data',
+      'name' => 'testkey',
+      'value' => 'testvalue',
+    );
+    $this->assertCommand($commands, $expected, "'data' AJAX command issued with correct key and value");
+
+    // Tests the 'invoke' command.
+    $commands = $this->drupalPostAJAX($form_path, $edit, array('op' => t("AJAX invoke command: Invoke addClass() method.")));
+    $expected = array(
+      'command' => 'invoke',
+      'method' => 'addClass',
+      'arguments' => array('error'),
+    );
+    $this->assertCommand($commands, $expected, "'invoke' AJAX command issued with correct method and argument");
+
+    // Tests the 'html' command.
+    $commands = $this->drupalPostAJAX($form_path, $edit, array('op' => t("AJAX html: Replace the HTML in a selector.")));
+    $expected = array(
+      'command' => 'insert',
+      'method' => 'html',
+      'data' => 'replacement text',
+    );
+    $this->assertCommand($commands, $expected, "'html' AJAX command issued with correct data");
+
+    // Tests the 'insert' command.
+    $commands = $this->drupalPostAJAX($form_path, $edit, array('op' => t("AJAX insert: Let client insert based on #ajax['method'].")));
+    $expected = array(
+      'command' => 'insert',
+      'data' => 'insert replacement text',
+    );
+    $this->assertCommand($commands, $expected, "'insert' AJAX command issued with correct data");
+
+    // Tests the 'prepend' command.
+    $commands = $this->drupalPostAJAX($form_path, $edit, array('op' => t("AJAX 'prepend': Click to prepend something")));
+    $expected = array(
+      'command' => 'insert',
+      'method' => 'prepend',
+      'data' => 'prepended text',
+    );
+    $this->assertCommand($commands, $expected, "'prepend' AJAX command issued with correct data");
+
+    // Tests the 'remove' command.
+    $commands = $this->drupalPostAJAX($form_path, $edit, array('op' => t("AJAX 'remove': Click to remove text")));
+    $expected = array(
+      'command' => 'remove',
+      'selector' => '#remove_text',
+    );
+    $this->assertCommand($commands, $expected, "'remove' AJAX command issued with correct command and selector");
+
+    // Tests the 'restripe' command.
+    $commands = $this->drupalPostAJAX($form_path, $edit, array('op' => t("AJAX 'restripe' command")));
+    $expected = array(
+      'command' => 'restripe',
+      'selector' => '#restripe_table',
+    );
+    $this->assertCommand($commands, $expected, "'restripe' AJAX command issued with correct selector");
+
+    // Tests the 'settings' command.
+    $commands = $this->drupalPostAJAX($form_path, $edit, array('op' => t("AJAX 'settings' command")));
+    $expected = array(
+      'command' => 'settings',
+      'settings' => array('ajax_forms_test' => array('foo' => 42)),
+    );
+    $this->assertCommand($commands, $expected, "'settings' AJAX command issued with correct data");
+
+    // Tests the 'add_css' command.
+    $commands = $this->drupalPostAJAX($form_path, $edit, array('op' => t("AJAX 'add_css' command")));
+    $expected = array(
+      'command' => 'add_css',
+      'data' => 'my/file.css',
+    );
+    $this->assertCommand($commands, $expected, "'add_css' AJAX command issued with correct data");
+  }
+}
+
+/**
+ * Test that $form_state['values'] is properly delivered to $ajax['callback'].
+ */
+class AJAXFormValuesTestCase extends AJAXTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'AJAX command form values',
+      'description' => 'Tests that form values are properly delivered to AJAX callbacks.',
+      'group' => 'AJAX',
+    );
+  }
+
+  function setUp() {
+    parent::setUp();
+
+    $this->web_user = $this->drupalCreateUser(array('access content'));
+    $this->drupalLogin($this->web_user);
+  }
+
+  /**
+   * Create a simple form, then POST to system/ajax to change to it.
+   */
+  function testSimpleAJAXFormValue() {
+    // Verify form values of a select element.
+    foreach (array('red', 'green', 'blue') as $item) {
+      $edit = array(
+        'select' => $item,
+      );
+      $commands = $this->drupalPostAJAX('ajax_forms_test_get_form', $edit, 'select');
+      $expected = array(
+        'command' => 'data',
+        'value' => $item,
+      );
+      $this->assertCommand($commands, $expected, "verification of AJAX form values from a selectbox issued with a correct value");
+    }
+
+    // Verify form values of a checkbox element.
+    foreach (array(FALSE, TRUE) as $item) {
+      $edit = array(
+        'checkbox' => $item,
+      );
+      $commands = $this->drupalPostAJAX('ajax_forms_test_get_form', $edit, 'checkbox');
+      $expected = array(
+        'command' => 'data',
+        'value' => (int) $item,
+      );
+      $this->assertCommand($commands, $expected, "verification of AJAX form values from a checkbox issued with a correct value");
+    }
+  }
+}
+
+/**
+ * Tests that Ajax-enabled forms work when multiple instances of the same form are on a page.
+ */
+class AJAXMultiFormTestCase extends AJAXTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'AJAX multi form',
+      'description' => 'Tests that AJAX-enabled forms work when multiple instances of the same form are on a page.',
+      'group' => 'AJAX',
+    );
+  }
+
+  function setUp() {
+    parent::setUp(array('form_test'));
+
+    // Create a multi-valued field for 'page' nodes to use for Ajax testing.
+    $field_name = 'field_ajax_test';
+    $field = array(
+      'field_name' => $field_name,
+      'type' => 'text',
+      'cardinality' => FIELD_CARDINALITY_UNLIMITED,
+    );
+    field_create_field($field);
+    $instance = array(
+      'field_name' => $field_name,
+      'entity_type' => 'node',
+      'bundle' => 'page',
+    );
+    field_create_instance($instance);
+
+    // Login a user who can create 'page' nodes.
+    $this->web_user = $this->drupalCreateUser(array('create page content'));
+    $this->drupalLogin($this->web_user);
+  }
+
+  /**
+   * Test that a page with the 'page_node_form' included twice works correctly.
+   */
+  function testMultiForm() {
+    // HTML IDs for elements within the field are potentially modified with
+    // each Ajax submission, but these variables are stable and help target the
+    // desired elements.
+    $field_name = 'field_ajax_test';
+    $field_xpaths = array(
+      'page-node-form' => '//form[@id="page-node-form"]//div[contains(@class, "field-name-field-ajax-test")]',
+      'page-node-form--2' => '//form[@id="page-node-form--2"]//div[contains(@class, "field-name-field-ajax-test")]',
+    );
+    $button_name = $field_name . '_add_more';
+    $button_value = t('Add another item');
+    $button_xpath_suffix = '//input[@name="' . $button_name . '"]';
+    $field_items_xpath_suffix = '//input[@type="text"]';
+
+    // Ensure the initial page contains both node forms and the correct number
+    // of field items and "add more" button for the multi-valued field within
+    // each form.
+    $this->drupalGet('form-test/two-instances-of-same-form');
+    foreach ($field_xpaths as $form_html_id => $field_xpath) {
+      $this->assert(count($this->xpath($field_xpath . $field_items_xpath_suffix)) == 1, t('Found the correct number of field items on the initial page.'));
+      $this->assertFieldByXPath($field_xpath . $button_xpath_suffix, NULL, t('Found the "add more" button on the initial page.'));
+    }
+    $this->assertNoDuplicateIds(t('Initial page contains unique IDs'), 'Other');
+
+    // Submit the "add more" button of each form twice. After each corresponding
+    // page update, ensure the same as above.
+    foreach ($field_xpaths as $form_html_id => $field_xpath) {
+      for ($i = 0; $i < 2; $i++) {
+        $this->drupalPostAJAX(NULL, array(), array($button_name => $button_value), 'system/ajax', array(), array(), $form_html_id);
+        $this->assert(count($this->xpath($field_xpath . $field_items_xpath_suffix)) == $i+2, t('Found the correct number of field items after an AJAX submission.'));
+        $this->assertFieldByXPath($field_xpath . $button_xpath_suffix, NULL, t('Found the "add more" button after an AJAX submission.'));
+        $this->assertNoDuplicateIds(t('Updated page contains unique IDs'), 'Other');
+      }
+    }
+  }
+}
+
+/**
+ * Test Ajax forms when page caching for anonymous users is turned on.
+ */
+class AJAXFormPageCacheTestCase extends AJAXTestCase {
+  protected $profile = 'testing';
+
+  public static function getInfo() {
+    return array(
+      'name' => 'AJAX forms on cached pages',
+      'description' => 'Tests that AJAX forms work properly for anonymous users on cached pages.',
+      'group' => 'AJAX',
+    );
+  }
+
+  public function setUp() {
+    parent::setUp();
+
+    variable_set('cache', TRUE);
+  }
+
+  /**
+   * Return the build id of the current form.
+   */
+  protected function getFormBuildId() {
+    $build_id_fields = $this->xpath('//input[@name="form_build_id"]');
+    $this->assertEqual(count($build_id_fields), 1, 'One form build id field on the page');
+    return (string) $build_id_fields[0]['value'];
+  }
+
+  /**
+   * Create a simple form, then POST to system/ajax to change to it.
+   */
+  public function testSimpleAJAXFormValue() {
+    $this->drupalGet('ajax_forms_test_get_form');
+    $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'MISS', 'Page was not cached.');
+    $build_id_initial = $this->getFormBuildId();
+
+    $edit = array('select' => 'green');
+    $commands = $this->drupalPostAJAX(NULL, $edit, 'select');
+    $build_id_first_ajax = $this->getFormBuildId();
+    $this->assertNotEqual($build_id_initial, $build_id_first_ajax, 'Build id is changed in the simpletest-DOM on first AJAX submission');
+    $expected = array(
+      'command' => 'updateBuildId',
+      'old' => $build_id_initial,
+      'new' => $build_id_first_ajax,
+    );
+    $this->assertCommand($commands, $expected, 'Build id change command issued on first AJAX submission');
+
+    $edit = array('select' => 'red');
+    $commands = $this->drupalPostAJAX(NULL, $edit, 'select');
+    $build_id_second_ajax = $this->getFormBuildId();
+    $this->assertEqual($build_id_first_ajax, $build_id_second_ajax, 'Build id remains the same on subsequent AJAX submissions');
+
+    // Repeat the test sequence but this time with a page loaded from the cache.
+    $this->drupalGet('ajax_forms_test_get_form');
+    $this->assertEqual($this->drupalGetHeader('X-Drupal-Cache'), 'HIT', 'Page was cached.');
+    $build_id_from_cache_initial = $this->getFormBuildId();
+    $this->assertEqual($build_id_initial, $build_id_from_cache_initial, 'Build id is the same as on the first request');
+
+    $edit = array('select' => 'green');
+    $commands = $this->drupalPostAJAX(NULL, $edit, 'select');
+    $build_id_from_cache_first_ajax = $this->getFormBuildId();
+    $this->assertNotEqual($build_id_from_cache_initial, $build_id_from_cache_first_ajax, 'Build id is changed in the simpletest-DOM on first AJAX submission');
+    $this->assertNotEqual($build_id_first_ajax, $build_id_from_cache_first_ajax, 'Build id from first user is not reused');
+    $expected = array(
+      'command' => 'updateBuildId',
+      'old' => $build_id_from_cache_initial,
+      'new' => $build_id_from_cache_first_ajax,
+    );
+    $this->assertCommand($commands, $expected, 'Build id change command issued on first AJAX submission');
+
+    $edit = array('select' => 'red');
+    $commands = $this->drupalPostAJAX(NULL, $edit, 'select');
+    $build_id_from_cache_second_ajax = $this->getFormBuildId();
+    $this->assertEqual($build_id_from_cache_first_ajax, $build_id_from_cache_second_ajax, 'Build id remains the same on subsequent AJAX submissions');
+  }
+}
+
+
+/**
+ * Miscellaneous Ajax tests using ajax_test module.
+ */
+class AJAXElementValidation extends AJAXTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'Miscellaneous AJAX tests',
+      'description' => 'Various tests of AJAX behavior',
+      'group' => 'AJAX',
+    );
+  }
+
+  /**
+   * Try to post an Ajax change to a form that has a validated element.
+   *
+   * The drivertext field is Ajax-enabled. An additional field is not, but
+   * is set to be a required field. In this test the required field is not
+   * filled in, and we want to see if the activation of the "drivertext"
+   * Ajax-enabled field fails due to the required field being empty.
+   */
+  function testAJAXElementValidation() {
+    $web_user = $this->drupalCreateUser();
+    $edit = array('drivertext' => t('some dumb text'));
+
+    // Post with 'drivertext' as the triggering element.
+    $post_result = $this->drupalPostAJAX('ajax_validation_test', $edit, 'drivertext');
+    // Look for a validation failure in the resultant JSON.
+    $this->assertNoText(t('Error message'), "No error message in resultant JSON");
+    $this->assertText('ajax_forms_test_validation_form_callback invoked', 'The correct callback was invoked');
+  }
+}