<?php

/**

 * Tests for the lock system.

 */

class LockFunctionalTest extends DrupalWebTestCase {

  public static function getInfo() {

    return array(

      'name' => 'Locking framework tests',

      'description' => 'Confirm locking works between two separate requests.',

      'group' => 'System',

    );

  }

  function setUp() {

    parent::setUp('system_test');

  }

  /**

   * Confirm that we can acquire and release locks in two parallel requests.

   */

  function testLockAcquire() {

    $lock_acquired = 'TRUE: Lock successfully acquired in system_test_lock_acquire()';

    $lock_not_acquired = 'FALSE: Lock not acquired in system_test_lock_acquire()';

    $this->assertTrue(lock_acquire('system_test_lock_acquire'), 'Lock acquired by this request.', 'Lock');

    $this->assertTrue(lock_acquire('system_test_lock_acquire'), 'Lock extended by this request.', 'Lock');

    lock_release('system_test_lock_acquire');

    // Cause another request to acquire the lock.

    $this->drupalGet('system-test/lock-acquire');

    $this->assertText($lock_acquired, 'Lock acquired by the other request.', 'Lock');

    // The other request has finished, thus it should have released its lock.

    $this->assertTrue(lock_acquire('system_test_lock_acquire'), 'Lock acquired by this request.', 'Lock');

    // This request holds the lock, so the other request cannot acquire it.

    $this->drupalGet('system-test/lock-acquire');

    $this->assertText($lock_not_acquired, 'Lock not acquired by the other request.', 'Lock');

    lock_release('system_test_lock_acquire');

    // Try a very short timeout and lock breaking.

    $this->assertTrue(lock_acquire('system_test_lock_acquire', 0.5), 'Lock acquired by this request.', 'Lock');

    sleep(1);

    // The other request should break our lock.

    $this->drupalGet('system-test/lock-acquire');

    $this->assertText($lock_acquired, 'Lock acquired by the other request, breaking our lock.', 'Lock');

    // We cannot renew it, since the other thread took it.

    $this->assertFalse(lock_acquire('system_test_lock_acquire'), 'Lock cannot be extended by this request.', 'Lock');

    // Check the shut-down function.

    $lock_acquired_exit = 'TRUE: Lock successfully acquired in system_test_lock_exit()';

    $lock_not_acquired_exit = 'FALSE: Lock not acquired in system_test_lock_exit()';

    $this->drupalGet('system-test/lock-exit');

    $this->assertText($lock_acquired_exit, 'Lock acquired by the other request before exit.', 'Lock');

    $this->assertTrue(lock_acquire('system_test_lock_exit'), 'Lock acquired by this request after the other request exits.', 'Lock');

  }

}