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.

Author: Nele Gagar
Country: Belize
Language: English (Spanish)
Genre: Education
Published (Last): 21 June 2017
Pages: 351
PDF File Size: 2.8 Mb
ePub File Size: 20.86 Mb
ISBN: 446-6-83094-202-4
Downloads: 47617
Price: Free* [*Free Regsitration Required]
Uploader: Gagore

We were about to implement our own Mocking based on reflect. Test ; import org. Constants are available in the EasyMock class.

Download the free trial.

tutoria,s The following description demonstrates the usage of EasyMock. A first attempt may look like: Unexpected method call documentAdded “New Document”: However, this only works if the method logThrowable in the example usage accepts Throwable s, and does not require something more specific like a RuntimeException.

A class mock can also be serialized. In the previous code snippet you see interaction of JUnit and EasyMock.

Online training

If a document is added on the tuforials under test, we expect a call to mock. Set behavior for a mock or for a concrete method which is required for the testing of object under the test.

If more than one mock can be assigned to the same field then this is considered an error. I’m just using a String for the sake of this example. Please note “Actual DB call will occur Creating Return Values or Exceptions Sometimes we would like our mock object to return a value or throw an easykock that is created at the time of the actual call. It can also be painful if the interface has many methods. The method has to be called easymoco record state after the call to the Mock Object for which it specifies the Throwable to be thrown.


The next test should check whether the addition of an already existing document leads to a call to mock. Join the DZone community and get the full member experience. Sometimes you may need to mock only some methods of a class and keep the normal behavior of others.

JUnit & EasyMock tutorial with a code examples

Doing so will let the developer focus only on that code to test it. The tutorial covers the basic concept of EasyMock. For this purpose you can use the EasyMock testing framework.

Using Easy Mock and JUnit 4. In case of failure, you can replace the tutorias instantiator with: The implementation is straightforward:. To define the new argument matcher, we implement the interface org. Mock ; import org. Null always return false.

To specify that the exact same instance is needed for this call, we use the method same that is statically imported from the Easyock class: You can set back the default one with setDefaultInstantiator.

Not only is it well crafted and easy to use. During partial mocking, if your method under test is calling some private methods, you will need to test them as well since you cannot mock them. Adv Java Practice Tests.


It is possible to create a mock by calling one of its constructor. EasyMock provides a default behavior for Object’s methods equals, hashCode, toString, finalize. To relax the expected call counts, there are additional methods that may be used instead of times int count:.

Which is what you try to avoid by using EasyMock. Finally, the type of dasymock concrete class tutorixls be checked statically against the mock type. To avoid the repetition of mock. See the original article here. Available for all numeric primitive types and Comparable. A more real-time example would be where the code has to interact with the payment gateway. Verification A first verification There is one error that we have not handled rasymock far: Unchecked exceptions that is, RuntimeExceptionError and all their subclasses can be thrown from every method.

Easy Mock Tutorial

Available for float and double. If it’s not the case, or if you can’t do otherwise because of some development constraints, here’s the solution:. Private methods cannot be mocked.

To match an actual method call on the Mock Object with an expectation, Object arguments are by default compared with equals. Oren Gross, Mercury Interactive. So you want to keep the normal behavior of the tested method and mock the others.

Ok, in the previous paragraph I showed you the example of several simple JUnit tests.