LockFunctionalTest::testLockAcquire

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

File

modules/simpletest/tests/lock.test, line 23

Code

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'), t('Lock acquired by this request.'), t('Lock'));
  $this->assertTrue(lock_acquire('system_test_lock_acquire'), t('Lock extended by this request.'), t('Lock'));
  lock_release('system_test_lock_acquire');

  // Cause another request to acquire the lock.
  $this->drupalGet('system-test/lock-acquire');
  $this->assertText($lock_acquired, t('Lock acquired by the other request.'), t('Lock'));
  // The other request has finished, thus it should have released its lock.
  $this->assertTrue(lock_acquire('system_test_lock_acquire'), t('Lock acquired by this request.'), t('Lock'));
  // This request holds the lock, so the other request cannot acquire it.
  $this->drupalGet('system-test/lock-acquire');
  $this->assertText($lock_not_acquired, t('Lock not acquired by the other request.'), t('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), t('Lock acquired by this request.'), t('Lock'));
  sleep(1);
  // The other request should break our lock.
  $this->drupalGet('system-test/lock-acquire');
  $this->assertText($lock_acquired, t('Lock acquired by the other request, breaking our lock.'), t('Lock'));
  // We cannot renew it, since the other thread took it.
  $this->assertFalse(lock_acquire('system_test_lock_acquire'), t('Lock cannot be extended by this request.'), t('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, t('Lock acquired by the other request before exit.'), t('Lock'));
  $this->assertTrue(lock_acquire('system_test_lock_exit'), t('Lock acquired by this request after the other request exits.'), t('Lock'));
}