public void BadNetwork(string mockUrl, string detectionUrl)
        {
            mMockClient.SetResponse(mockUrl, new MockHttpResponse {
                StatusCode = HttpStatusCode.GatewayTimeout
            });

            Assert.Throws(typeof(AggregateException), () =>
            {
                mDetector.DetectImagesAsync(new Uri($"{BaseUrl}{detectionUrl}")).Wait();
            });
            Assert.Equal(expected: ImageDetectorState.BadNetwork, actual: mDetector.State);

            Thread.Sleep(4);
            mDetector.CheckStateAsync().Wait();
            Assert.Equal(expected: ImageDetectorState.Good, actual: mDetector.State);
        }