public function ApdqcLockFunctionalTest::testLockAcquire in Asynchronous Prefetch Database Query Cache 7

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

File

./apdqc.test, line 365

Tests for the Asynchronous Prefetch Database Query Cache module.

Class

ApdqcLockFunctionalTest

Tests for the lock system.

Code

public function testLockAcquire() {
  module_load_include('apdqc.lock.db.inc', 'apdqc');
  $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()';
  $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');
}