Note that we have to call MockitoAnnotations.initMocks(this) before test methods to get it initialized by the Mockito framework. We can use ArgumentCaptor argumentCaptor In this article, well cover multiple mock interfaces, listening invocations, matchers, and argument captors, and see firsthand how Mockito makes your tests. But you can also manually initialize the ArgumentCaptor without the Captor annotation: ArgumentCaptor argumentCaptor ArgumentCaptor.forClass (Xxx.class) Or, if you just need to avoid the UnnecessaryStubbingExceptions, you can add MockitoSettings.So instead of initializing field level ArgumentCaptor as:ĪrgumentCaptor argumentCaptor = ArgumentCaptor.forClass(String.class) Indeed, the Captor annotation only works when you enable the MockitoExtension. For Pet 1, we mock the DAO method to return null, a blank () String value for Pet 2, and JavaScript codes for Pet 3. Mockito ArgumentCaptor Example Mockito can use annotation to create argument captor at field level. We will mock the DAO method three times with different arguments to give us various string values in our test method. ArgumentCaptor provides an API to test the calculated value. Argument captors enable us to inspect fake values directly. Sometimes we build an object in test code and send it to a mocked dependent method without returning it. If you have multiple arguments to capture then you have to call getAllValues() to get the list of arguments. ArgumentCaptor validates stubbed method arguments. If the verified method was called multiple times then getValue() the method will return the latest captured value. GetValue() the method can be used when we have captured a single argument. We can usually create ArgumentCaptor an instance for any given class, then we use its capture() method to use with verify() methods.įinally, we can get arguments from getValue() and getAllValues() methods.
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