JUnit Interview Questions and Answers
Junit is a unit testing framework and is an open source helping in test-driven development. It is used to write and run the Java programs’ test cases. Junit interview questions are one of the topics which take the students’ mind, and they search for the answers to it. There are several factors and the parameters increasing the use of JUnit framework. It also acts as a relationship-builder between development and testing process and is used for testing the application without any use of the server.
Advantages
- Increases stability and productivity of the program code
- Reduces the debugging time
- Decreases the chances of errors
- Provides a text-based command line
- Consists of Swing-based and AWT-based graphical testing for reporting the process
Most Frequently Asked JUnit Interview Questions
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.
JWebUnit is one of the extensions of JUnit and is a Java-based testing framework for web applications. It offers high-level API of Java used for the navigation of the web applications in addition to the set of assertions for the verification of the authenticity of the application. The main function of JWebUnit is wrapping the existing frameworks for testing with a simple and unified testing interface to check for the credibility of the web applications.
Development History
This open source framework was developed by Erich Gamma and Kent Beck. Look for the best Junit interview questions