Unit is a unit testing framework for the Java programming language that plays a big role in regression testing.
We can perform unit testing by creating test cases. The unit test cases written by the developer/tester is a source code which ensures that the program logic works as expected.
Running tests automatically helps to identify the bug in the software due to changes in the source code.
In case of high test coverage of our code allows us to continue developing features without having to perform lots of manual tests.
Sample of Junit test:
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