public void HttpRetryMessageHandler_WaitAndRetryAsync_ThrowsException_If_Cancellation_Requested()
{
// Arrange
int maxReTries = 3;
var cancellationTokenSource = new CancellationTokenSource();
var httpRequestMessage = new HttpRequestMessage(HttpMethod.Get, "http://localhostTestApi.com");
var handler = new HttpRetryMessageHandler(maxReTries)
{
InnerHandler = new TestHttpMessageHandlerCancelAfterFirstTry()
{
CancellationTokenSource = cancellationTokenSource
}
};
var invoker = new HttpMessageInvoker(handler);
// Act
var exception = Assert.Catch <Exception>(() =>
{
var result = invoker.SendAsync(httpRequestMessage, cancellationTokenSource.Token).Result;
});
// Assert
Assert.IsNotNull(exception);
Assert.IsTrue(this.IsOperationCanceledException(exception));
Assert.AreEqual(((TestHttpMessageHandlerCancelAfterFirstTry)handler.InnerHandler).AttemptedTries, 1);
}
public void GetHttpClientMaxRetriesHandler_Sets_DefaultTimeOut_For_LessNumber_Of_Retries()
{
// Arrange
var handler = new HttpRetryMessageHandler(1);
var estimatedTimeOut = HttpClientHelper.TimeOutInSecs(handler.MaxRetries);
var defaultTimeOut = new HttpClient().Timeout;
// Act
var httpClient = HttpClientHelper.GetHttpClientWithMaxRetriesHandler(handler.MaxRetries);
var actualTimeOut = httpClient.Timeout.TotalSeconds;
// Assert
Assert.IsTrue(estimatedTimeOut < defaultTimeOut.TotalSeconds);
Assert.AreEqual(defaultTimeOut, httpClient.Timeout);
}
public void HttpGet_Success_In_FirstTry()
{
// Arrange
var httpRequestMessage = new HttpRequestMessage(HttpMethod.Get, "http://localhostTestApi.com");
var handler = new HttpRetryMessageHandler()
{
InnerHandler = new TestHttpRetryMessageHandlerSuccess()
};
var invoker = new HttpMessageInvoker(handler);
// Act
var result = invoker.SendAsync(httpRequestMessage, CancellationToken.None).Result;
// Assert
Assert.AreEqual(((TestHttpRetryMessageHandlerSuccess)handler.InnerHandler).AttemptedTries, 1);
}
public void GetHttpClientMaxRetriesHandler_SetsTimeOutBased_On_MaxRetries()
{
// Arrange
var handler = new HttpRetryMessageHandler(5);
double expectedTimeOut = 20 * (handler.MaxRetries + 1);
for (int reAttemptNo = 1; reAttemptNo <= handler.MaxRetries; reAttemptNo++)
{
expectedTimeOut += HttpClientHelper.ExponentialSleepDuration(reAttemptNo).TotalSeconds;
}
// Act
var httpClient = HttpClientHelper.GetHttpClientWithMaxRetriesHandler(handler.MaxRetries);
var actualTimeOut = httpClient.Timeout.TotalSeconds;
// Assert
Assert.IsTrue(actualTimeOut >= 100);
Assert.IsTrue(Math.Abs(expectedTimeOut - actualTimeOut) <= 1);
}
public void TotalTimeOutInSecs_Returns_TimeOut_Based_On_MaxRetries()
{
for (int maxRetries = 1; maxRetries <= HttpClientHelper.DefaultMaxRetries; maxRetries++)
{
// Arrange
var handler = new HttpRetryMessageHandler(maxRetries);
double expectedTimeOut = 20 * (handler.MaxRetries + 1);
for (int reAttemptNo = 1; reAttemptNo <= handler.MaxRetries; reAttemptNo++)
{
expectedTimeOut += HttpClientHelper.ExponentialSleepDuration(reAttemptNo).TotalSeconds;
}
// Act
var actualTimeOut = HttpClientHelper.TimeOutInSecs(handler.MaxRetries);
// Assert
Assert.IsTrue(Math.Abs(expectedTimeOut - actualTimeOut) <= 1);
}
}
public void HttpGet_MaxRetries_OnFailure()
{
// Arrange
int maxReTries = 2;
var httpRequestMessage = new HttpRequestMessage(HttpMethod.Get, "http://localhostTestApi.com");
var handler = new HttpRetryMessageHandler(maxReTries)
{
InnerHandler = new TestHttpRetryMessageHandlerFailure()
};
var invoker = new HttpMessageInvoker(handler);
// Act
var result = invoker.SendAsync(httpRequestMessage, CancellationToken.None).Result;
// Assert
Assert.AreEqual(((TestHttpRetryMessageHandlerFailure)handler.InnerHandler).AttemptedTries, maxReTries + 1);
}
public void GetTotalSleepDurationInSecs_Returns_SumOf_SleepTimes_Between_Each_Retry()
{
for (int maxRetries = 1; maxRetries <= HttpClientHelper.DefaultMaxRetries; maxRetries++)
{
// Arrange
var handler = new HttpRetryMessageHandler(maxRetries);
double expectedSleepTimeInSecs = 0;
for (int reAttemptNo = 1; reAttemptNo <= handler.MaxRetries; reAttemptNo++)
{
expectedSleepTimeInSecs += HttpClientHelper.ExponentialSleepDuration(reAttemptNo).TotalSeconds;
}
// Act
var actualSleepTimeInSecs = HttpClientHelper.GetTotalSleepDurationInSecs(handler.MaxRetries);
// Assert
Assert.IsTrue(Math.Abs(expectedSleepTimeInSecs - actualSleepTimeInSecs) <= 1);
}
}
