Tomek Kaczanowski is a technical team leader from Krakow, Poland. He has a strong interest in code quality, testing and automation - preferably all three together. Combining technical with soft skills, he also ventures into the realms of mentoring, teaching, lecturing and article writing, not to mention preaching sermons to the unconverted in the hope of redeeming them (or at least their code)! He hates doing things manually, and is allergic to empty src/test/java directories.
Practical Unit Testing With Junit And Mockito Pdf
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Testing is an important part of the software development process as it helps in resolving bugs before the software goes to production. Unit testing is a type of testing that tests individual entities at a time. JUnit is an open-source, Java-based and one of the most popular unit testing frameworks and is supported by most popular IDEs like Eclipse, IntelliJ etc. It is used to write and run unit tests by providing annotations for identifying the test methods and expected results. This framework allows writing codes faster, increases the quality of the source code and helps in identifying bugs in the source code at a very early stage.
JUnit is an open-source, Java-based unit testing framework that plays a crucial role in achieving the culture of TDD (Test Driven Development). The TDD culture lays strong emphasis on setting up the test data for testing a logic that would be implemented once the testing is successful. JUnit helps to increase the software stability as it helps in identifying the bug in the code logic at an early stage without requiring the software to go to production. This helps in reducing the time required to debug any issues later on.
JUnit is used more often by developers for implementing unit test cases for the functionalities they have developed. However, these days testers also use this framework for performing unit testing of the applications.
@RunWith annotation lets us run the JUnit tests with other custom JUnit Runners like SpringJUnit4ClassRunner, MockitoJUnitRunner etc. We can also do parameterized testing in JUnit by making use of @RunWith(Parameterized.class).
Mocking is the process of creating and using mock objects that simulates the behaviour of real objects and is used to isolate the behaviour of the module under test from its external dependencies or services. These are particularly useful in unit testing and help in making unit test cases repeatable and predictable. Mocking is required in the following cases:
Writing Unit Test Cases has various advantages like design testability, code testability, enhances code maintainability and helps developers enforce object-oriented principles that aids to avoid code smells like long methods, large conditions, long classes etc. It helps to identify any existing logic flaw in the application. Due to these reasons, it has become important for developers to know how to unit test the functionalities developed by them. JUnit is one such popular framework that has robust support for unit testing. 2ff7e9595c
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