function LockFunctionalTest::testLockAcquire

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

File

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

Class

LockFunctionalTest

Tests for the lock system.

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'), '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');
}