public function unlock()
 {
     if ($this->lockValue) {
         $this->backend->deleteIfKeyHasValue($this->lockKey, $this->lockValue);
         $this->lockValue = null;
     }
 }
 public function test_deleteIfKeyHasValue_ShouldNotWork_IfValueIsDifferent()
 {
     $this->redis->setIfNotExists($this->key, 'test', 60);
     $success = $this->redis->deleteIfKeyHasValue($this->key, 'test2');
     $this->assertFalse($success);
 }