class LockTest

class LockTest extends KernelTestBase {
    
    /**
     * Database lock backend to test.
     *
     * @var \Drupal\Core\Lock\DatabaseLockBackend
     */
    protected $lock;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->lock = new DatabaseLockBackend($this->container
            ->get('database'));
    }
    
    /**
     * Tests backend release functionality.
     */
    public function testBackendLockRelease() {
        $success = $this->lock
            ->acquire('lock_a');
        $this->assertTrue($success, 'Could acquire first lock.');
        // This function is not part of the backend, but the default database
        // backend implement it, we can here use it safely.
        $is_free = $this->lock
            ->lockMayBeAvailable('lock_a');
        $this->assertFalse($is_free, 'First lock is unavailable.');
        $this->lock
            ->release('lock_a');
        $is_free = $this->lock
            ->lockMayBeAvailable('lock_a');
        $this->assertTrue($is_free, 'First lock has been released.');
        $success = $this->lock
            ->acquire('lock_b');
        $this->assertTrue($success, 'Could acquire second lock.');
        $success = $this->lock
            ->acquire('lock_b');
        $this->assertTrue($success, 'Could acquire second lock a second time within the same request.');
        $this->lock
            ->release('lock_b');
        // Test acquiring and releasing a lock with a long key (over 255 chars).
        $long_key = 'long_key:BZoMiSf9IIPULsJ98po18TxJ6T4usd3MZrLE0d3qMgG6iAgDlOi1G3oMap7zI5df84l7LtJBg4bOj6XvpO6vDRmP5h5QbA0Bj9rVFiPIPAIQZ9qFvJqTALiK1OR3GpOkWQ4vgEA4LkY0UfznrWBeuK7IWZfv1um6DLosnVXd1z1cJjvbEUqYGJj92rwHfhYihLm8IO9t3P2gAvEkH5Mhc8GBoiTsIDnP01Te1kxGFHO3RuvJIxPnHmZtSdBggmuVN7x9';
        $success = $this->lock
            ->acquire($long_key);
        $this->assertTrue($success, 'Could acquire long key lock.');
        // This function is not part of the backend, but the default database
        // backend implement it, we can here use it safely.
        $is_free = $this->lock
            ->lockMayBeAvailable($long_key);
        $this->assertFalse($is_free, 'Long key lock is unavailable.');
        $this->lock
            ->release($long_key);
        $is_free = $this->lock
            ->lockMayBeAvailable($long_key);
        $this->assertTrue($is_free, 'Long key lock has been released.');
    }
    
    /**
     * Tests backend release functionality.
     */
    public function testBackendLockReleaseAll() {
        $success = $this->lock
            ->acquire('lock_a');
        $this->assertTrue($success, 'Could acquire first lock.');
        $success = $this->lock
            ->acquire('lock_b');
        $this->assertTrue($success, 'Could acquire second lock.');
        $this->lock
            ->releaseAll();
        $is_free = $this->lock
            ->lockMayBeAvailable('lock_a');
        $this->assertTrue($is_free, 'First lock has been released.');
        $is_free = $this->lock
            ->lockMayBeAvailable('lock_b');
        $this->assertTrue($is_free, 'Second lock has been released.');
    }

}