[Test] public void ToStringVerification([Values(true, false)] bool isFair)
 {
     _lock = new ReentrantLock(isFair);
     StringAssert.Contains("Unlocked", _lock.ToString());
     using (_lock.Lock())
     {
         StringAssert.Contains("Locked by thread", _lock.ToString());
     }
     StringAssert.Contains("Unlocked", _lock.ToString());
 }