public async Task RespectsMaxDelay()
{
var responseClassifier = new MockResponseClassifier(retriableCodes: new [] { 500 });
var policy = new ExponentialRetryPolicyMock(maxRetries: 6, delay: TimeSpan.FromSeconds(1), maxDelay: TimeSpan.FromSeconds(5));
var mockTransport = new MockTransport();
var task = SendRequest(mockTransport, policy, responseClassifier);
var expectedDelaysInSeconds = new int[] { 1, 2, 4, 5, 5, 5 };
await mockTransport.RequestGate.Cycle(new MockResponse(500));
for (int i = 0; i < 6; i++)
{
var delay = await policy.DelayGate.Cycle();
AssertExponentialDelay(TimeSpan.FromSeconds(expectedDelaysInSeconds[i]), delay);
await mockTransport.RequestGate.Cycle(new MockResponse(500));
}
var response = await task.TimeoutAfterDefault();
Assert.AreEqual(500, response.Status);
}
public async Task MsHeadersArePreferredOverRetryAfter(string headerName)
{
var responseClassifier = new MockResponseClassifier(retriableCodes: new[] { 500 });
(HttpPipelinePolicy policy, AsyncGate <TimeSpan, object> gate) = CreateRetryPolicy(maxRetries: 3);
var mockTransport = new MockTransport();
Task <Response> task = SendGetRequest(mockTransport, policy, responseClassifier);
MockResponse mockResponse = new MockResponse(500);
mockResponse.AddHeader(new HttpHeader("Retry-After", "1"));
mockResponse.AddHeader(new HttpHeader(headerName, "120000"));
await mockTransport.RequestGate.Cycle(mockResponse);
TimeSpan retryDelay = await gate.Cycle();
await mockTransport.RequestGate.Cycle(new MockResponse(501));
Response response = await task.TimeoutAfterDefault();
Assert.AreEqual(TimeSpan.FromMilliseconds(120000), retryDelay);
Assert.AreEqual(501, response.Status);
}
public async Task RespectsRetryAfterHeaderWithDate()
{
var responseClassifier = new MockResponseClassifier(retriableCodes: new[] { 500 });
(HttpPipelinePolicy policy, AsyncGate <TimeSpan, object> gate) = CreateRetryPolicy(maxRetries: 3);
var mockTransport = new MockTransport();
Task <Response> task = SendGetRequest(mockTransport, policy, responseClassifier);
MockResponse mockResponse = new MockResponse(500);
// Use large value to avoid time based flakiness
mockResponse.AddHeader(new HttpHeader("Retry-After", DateTimeOffset.Now.AddHours(5).ToString("R")));
await mockTransport.RequestGate.Cycle(mockResponse);
TimeSpan retryDelay = await gate.Cycle();
await mockTransport.RequestGate.Cycle(new MockResponse(501));
Response response = await task.TimeoutAfterDefault();
Assert.Less(TimeSpan.FromHours(4), retryDelay);
Assert.AreEqual(501, response.Status);
}