Please explain JUnit extensions?

1.	Please explain JUnit extensions?
Answer» There are four extensions of Junit- XML Unit MockObject Cactus JWebUnit XML Unit- It offers a SET of supporting classes, a single JUnit extension class, XMLTestCase allowing the assertions to be made about the VALIDITY of a piece of XML, individual nodes in an XML piece which DOM Traversal exposes and many more. MockObject- This extension is used for the simulation of the behavior of the real and complex objects which are useful in the INCORPORATION of the unit test. Cactus- For lowering the cost of writing the tests and the server-side code, the simple test framework is used. It extends the JUnit and executes an in-CONTAINER strategy which results in the execution of testing inside a container. Cactus Integration Modules and Cactus Framework are the important components of Cactus. JWebUnit- This extension has a simple and unified testing interface wrapping the existing frameworks such as Selenium, and HtmUnit. Navigation of the web applications is done with a set of assertions by this high-level Java API.

Answer»

There are four extensions of Junit-

XML Unit- It offers a SET of supporting classes, a single JUnit extension class, XMLTestCase allowing the assertions to be made about the VALIDITY of a piece of XML, individual nodes in an XML piece which DOM Traversal exposes and many more.
MockObject- This extension is used for the simulation of the behavior of the real and complex objects which are useful in the INCORPORATION of the unit test.
Cactus- For lowering the cost of writing the tests and the server-side code, the simple test framework is used. It extends the JUnit and executes an in-CONTAINER strategy which results in the execution of testing inside a container. Cactus Integration Modules and Cactus Framework are the important components of Cactus.
JWebUnit- This extension has a simple and unified testing interface wrapping the existing frameworks such as Selenium, and HtmUnit. Navigation of the web applications is done with a set of assertions by this high-level Java API.

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