lock.test

<?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');
    }

}