unit test polly retry c#

I should add another retry around the retrieval of the access token, handle more cases in the switch statement, in short, this simple API is becoming an unmaintainable mess. C# Polly WaitAndRetry policy for function retry, Unit test Polly - Check whether the retry policy is triggered on timeout / error. Therefore, the call to Random.Next() has to be locked. The signatures use the TEST_CLASS and TEST_METHOD macros, which make the methods discoverable from the Test Explorer window. I also wasnt sure on the value of using async when its just a log, so I switched it out. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. In your test code, inject an equivalent policy that doesn't do any waiting, eg Retry (3) // etc Extract static SystemClock to interface If somebody changes the configuration, the test provides regression value by failing. I offer this variant in case you just want the shortest possible test of the functionality declared in a method like .SetWaitAndRetryPolicy1(). Here's an example from an blockchain challenge I had to do, I execute 4 calls in a row, so if the InjectionRate is 0.25 one of the 4 calls would trigger a Polly policy: You can unit test this by mocking out the HttpClient and setting up your own test version of the WaitAndRetryAsync policy. But the next problem arises: the API is going to be protected with OAuth so we have to get an access token from another endpoint and provide a bearer token to be able to retrieve products. Build Resilient HTTP Clients in C# on .NET 6 With Polly About GitHub Wiki SEE, a search engine enabler for GitHub Wikis In Test Explorer, choose Run All, or select the specific tests you want to run. using AutoFixture . Where can I find a clear diagram of the SPECK algorithm? Polly policies all fulfil execution interfaces (ISyncPolicy, ISyncPolicy, IAsyncPolicy and IAsyncPolicy). Have a question about this project? c# - Polly retry unit test - Stack Overflow The code is simple, it hardly needs further explanation. How do you unit test LoggerMessage.Define() in .NET Core 3.1 with Moq? Do all the tests need adjusting? Adding Polly retry policy to a mocked HttpClient? When you use code like this in a production environment you will quickly find out that there is a need of exception handling. Thanks for your suggestions. In your production code, inject the real policy you want to use. We do not want to loose any order because this will directly result in money loss. Lets try and create a unit test to test the behavior of the circuit breaker. By clicking Sign up for GitHub, you agree to our terms of service and To test that the retry policy is invoked, you could make the test setup configure a fake/mock ILog implementation, and (for example) assert that the expected call .Error ("Delaying for {delay}ms, .") in your onRetry delegate is made on the fake logger. There are no ads in this search engine enabler service. I cannot retrieve the HttpClient that has been configured with the Polly polly. Lets say I created a micro service to create orders. To add a new test project to an existing solution. When you retry with a delay, it means you think the the transient error will go away by itself after a short period of time. It will retry for a number of time when receiving any exception. Implement the retry delay calculation that makes the most sense in your situation.

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