3
我有以下測試代碼。使用Moq測試多線程情況會引發奇怪的錯誤
for (int z = 0; z < 1000; z++)
{
....
const int threads = 5;
CountdownEvent ce = new CountdownEvent(threads);
for (int i = 0; i < threads; i++)
{
ThreadPool.QueueUserWorkItem(delegate
{
checkerMock.GetCurrentlyReleasedVersion();
ce.Signal();
});
}
ce.Wait();
mock = Mock.Get(checkerMock);
mock.Verify(a => a.GetCurrentlyReleasedVersion(), Times.Exactly(threads), string.Format("on try {0} failed", z + 1));
}
有時候,測試幾次運行良好。但它永遠不會全部運行1,000
。
有時它拋出以下錯誤:以下錯誤
System.NullReferenceException: Object reference not set to an instance of an object.
at Moq.MethodCall.Matches(ICallContext call)
at System.Linq.Enumerable.WhereListIterator`1.MoveNext()
at System.Linq.Enumerable.Count(IEnumerable`1 source)
at Moq.Mock.VerifyCalls(Interceptor targetInterceptor, MethodCall expected, Expression expression, Times times)
at Moq.Mock.Verify(Mock mock, Expression`1 expression, Times times, String failMessage)
at Moq.Mock`1.Verify(Expression`1 expression, Times times, String failMessage)
等次:
Moq.MockException: on try 14 failed
Expected invocation on the mock exactly 5 times, but was 4 times: a => a.GetCurrentlyReleasedVersion()
No setups configured.
我相信這是與起訂量的問題。或者它是我的代碼的問題?
如果我等待5次倒計時事件,應該調用5次,而不是4次。而且第一個錯誤是生病的。
或者是Moq在這種情況下根本不是線程安全嗎?
編輯:這只是測試的一部分,應該不是問題,我已經刪除了我實際測試的內容,並留下了產生錯誤的內容。
我認爲你需要在這裏提供更多的代碼。你的checkerMock設置在哪裏? –
+1。我遇到了同樣的*間歇性問題。就我而言,這也是一個涉及多線程的場景 – danielpops
+1然後問題Daniel =) –