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NSubstitute–Checking received calls

Although I prefer stubbing over mocking as much as possible, sometimes it is unavoidable to check the behavior of your test objects. It is a tradeoff to make between rewriting the application logic to make it easier testable or using some mocking magic.

In NSubstitute, the stubbing library of my choice, you can use the Received() or DidNotReceive() extension methods:

var calculator=Substitute.For<ICalculator>();
calculator.Add(1, 2);
// Check received with second arg of 2 and any first arg:
calculator.Received().Add(Arg.Any<int>(), 2);
view raw nsubstitute.cs hosted with ❤ by GitHub

More information: https://nsubstitute.github.io/help/received-calls/

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