public async Task GetValueAsync_ReturnsExpectedValue()
        {
            SingletonLock value = (SingletonLock)(await _valueProvider.GetValueAsync());

            Assert.Equal(_lockId, value.Id);
            Assert.Equal(TestInstanceId, value.FunctionId);
        }
        public async Task ToInvokeString_ReturnsExpectedValue()
        {
            SingletonManager       singletonManager   = new SingletonManager(null, null, null, null, null, new FixedHostIdProvider(TestHostId));
            SingletonAttribute     attribute          = new SingletonAttribute();
            SingletonValueProvider localValueProvider = new SingletonValueProvider(_method, attribute.ScopeId, TestInstanceId, attribute, singletonManager);
            SingletonLock          singletonLock      = (SingletonLock)(await localValueProvider.GetValueAsync());

            Assert.Equal("ScopeId: (null)", localValueProvider.ToInvokeString());

            attribute          = new SingletonAttribute(@"{Region}\{Zone}");
            localValueProvider = new SingletonValueProvider(_method, @"Central\3", TestInstanceId, attribute, singletonManager);
            singletonLock      = (SingletonLock)(await localValueProvider.GetValueAsync());
            Assert.Equal(@"ScopeId: Central\3", localValueProvider.ToInvokeString());
        }
        public async Task SingletonWatcher_GetStatus_ReturnsExpectedValue()
        {
            Mock <SingletonManager> mockSingletonManager = new Mock <SingletonManager>(MockBehavior.Strict, null, null, null, null, null, new FixedHostIdProvider(TestHostId), null);

            mockSingletonManager.Setup(p => p.GetLockOwnerAsync(_attribute, _lockId, CancellationToken.None)).ReturnsAsync("someotherguy");
            SingletonValueProvider localValueProvider = new SingletonValueProvider(_method, _attribute.ScopeId, TestInstanceId, _attribute, mockSingletonManager.Object);
            SingletonLock          localSingletonLock = (SingletonLock)(await localValueProvider.GetValueAsync());

            // set start time before _minimumWaitForFirstOwnerCheck in SingletonValueProvider
            DateTime startTime   = DateTime.UtcNow - TimeSpan.FromSeconds(11);
            DateTime endTime     = DateTime.UtcNow + TimeSpan.FromSeconds(2);
            DateTime releaseTime = endTime + TimeSpan.FromSeconds(1);

            // before lock is called
            SingletonValueProvider.SingletonWatcher watcher = (SingletonValueProvider.SingletonWatcher)localValueProvider.Watcher;
            SingletonParameterLog log = (SingletonParameterLog)watcher.GetStatus();

            Assert.Null(log.LockOwner);
            Assert.False(log.LockAcquired);
            Assert.Null(log.LockDuration);
            Assert.Null(log.TimeToAcquireLock);

            // in the process of locking
            localSingletonLock.AcquireStartTime = startTime;
            log = (SingletonParameterLog)watcher.GetStatus();
            Assert.Equal("someotherguy", log.LockOwner);
            Assert.False(log.LockAcquired);
            Assert.Null(log.LockDuration);
            Assert.NotNull(log.TimeToAcquireLock);

            // lock acquired but not released
            localSingletonLock.AcquireEndTime = endTime;
            log = (SingletonParameterLog)watcher.GetStatus();
            Assert.Null(log.LockOwner);
            Assert.True(log.LockAcquired);
            Assert.NotNull(log.LockDuration);
            Assert.Equal(endTime - startTime, log.TimeToAcquireLock);

            // lock released
            localSingletonLock.ReleaseTime = releaseTime;
            log = (SingletonParameterLog)watcher.GetStatus();
            Assert.Null(log.LockOwner);
            Assert.True(log.LockAcquired);
            Assert.Equal(releaseTime - endTime, log.LockDuration);
            Assert.Equal(endTime - startTime, log.TimeToAcquireLock);
        }