Stubbing void methods so that they throw exceptions
In this recipe, we will stub a void method. It doesn't return a value, so it throws an exception.
Getting ready
We'll reuse the example from the previous recipe, but let's take a fast look at it again. We have a system under test that combines two classes: a PersonDataUpdator class that delegates work to TaxFactorService. The latter is a nice example of violating the single responsibility principle (S from SOLID; refer to Chapter 2, Creating Mocks, for more details) and it does too much, it calculates a mean value of tax factors (in our case, it's fixed) and then it updates the person's information via a web service. In this scenario, we will verify how our system works when an exception related ...
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