Here is a first example: @Before public void setUp() { mock = mock(Collaborator. class); // 1 classUnderTest = new ClassUnderTest(); classUnderTest. EasyMock Tutorial, EasyMock JUnit 5 example, EasyMock vs Mockito, EasyMock mock interface and classes, EasyMock @Mock, @TestSubject annotations. In this post, I’m going to show you what EasyMock is and how you can use it for testing your java application.

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In this case unit tests can be aggregated in test suits by some feature. Create a new test for IncomeCalculator and place the new test class in this folder. If called, their normal code will be executed. Class instantiation is performed using Objenesis. Doing so will let the developer focus only on that code to test it.


Test ; import org. Develop the Delivery You Want. Flexible Expectations with Argument Matchers To match an actual method call on the Mock Object with an expectation, Object arguments are by default compared with equals. Available for primitive and object arrays. In the previous code snippet tutoriaos see interaction of JUnit and EasyMock.

Inside an IAnswer callback, the arguments passed to the mock call are available via EasyMock. After execution of the test you can call the verify method to check if the mock object was called as defined. If you use Maven, the final required dependencies will look like this: Mocks are injected to any field in any TestSubject that is of compatible type. Proxy, but seems like you saved us lot of trouble.

For specifying return values, we wrap the expected call in expect T value and specify the return value with the method andReturn Object returnValue on the object returned by expect T value. During recording, a mock is not thread-safe. JUnit4, JUnit5, and Spock: Recording your favorite song. It is possible to create a mock by calling one of its constructor. The next test should check whether the addition of an already existing document leads to a call to mock.


EasyMockRunner ; import org. So in the record state before calling replaythe Mock Object does not behave like a Mock Object, but it records method calls.

You can also specify a CaptureType telling that a given Capture should keep the first, the last, all or no captured values.

EasyMock Tutorial

Playing your favorite song. Defining your own Argument Matchers Sometimes it is desirable to define own argument matchers. The interfaces are mocked fasymock that a dummy functionality is added to a mock interface by using EasyMock. The tutorial covers the basic concept of EasyMock. Self testing It is possible to create a mock by calling one of its constructor.

However, yutorials these purposes, you don’t need to know the details about proxy objects. In this case easymocm the methods added with addMockedMethod s will be mocked mockedMethod in the example. Possible values are “true” or “false”. If it’s not the case, or if you can’t do otherwise because of some development constraints, here’s the solution: You set this easmock instantiator using ClassInstantiatorFactory.

To verify that the specified behavior has been used, we have to call verify mock: It should be used this way:.

The mock is instantiated by the runner at step 1. The replay method is called to make the Mock object available. EasyMock provides a property mechanisim allowing to alter its behavior.

EasyMock and JUnit can work together to make unit testing your Java code much easier through the use of proxy objects. Up to now, our test has only considered a single method call. Before I start JUnit tests development, I want to repeat canonical aims of unit tests. The behavior for the four Tutotials methods equalshashCodetoString and finalize cannot be changed for Mock Objects created with EasyMock, even if they are part of the interface for tutorilas the Mock Object is created.


You can download the source code of the tutorial from my DropBox. If you would like a “nice” Mock Object that by default allows eaaymock method calls and returns appropriate empty values 0null or falseuse nice Mock instead. Just add the following dependency to your pom. Here is the example above, now using annotations: If you use Maven, the final required dependencies will look like this:.

JUnit Testing Using EasyMock

We will now build a test case and toy around with it to understand the functionalities of EasyMock. The method has to be called in record state after the call to the Mock Object for which it specifies the Throwable to be thrown.

Here is the test without the definition of the Mock Object: Erasing the tape, making it blank to record a new song.

Free use of the software examples is granted under the terms of the Eclipse Public License 2. Please note “Actual DB call will occur To be sure, we check this three times hey, it is an example ;-: Portions in the application will be represented as an enumeration.