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');
}