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This post is focused on Junit - Testing Framework. Let Start from an introduction
What is Junit?
It is an open-source testing framework for java programmers. The java programmer can create test cases and test his/her own code .Erich Gamma and Kent Beck initially develop it. It is an instance of xUnit architecture. As the name implies, it is used for Unit Testing of a small chunk of code.
What is Unit Testing?
Before discussing Junit testing in detail, it is imperative to understand what is Unit Testing?
Unit Testing is used to verify a small set of code by creating a path, function or a method. The term “unit” exist earlier than the object-oriented concepts. It is basically a natural abstraction of an object oriented system i.e. a Java class or object (its instantiated form).
Types of unit testing
There are two ways to perform unit testing: 1) manual testing 2) automated testing.
1. Manual Testing
If you execute the test cases manually without any tool support, it is known as manual testing. It is time consuming and less reliable.
2. Automated Testing
If you execute the test cases by tool support, it is known as automated testing. It is fast and more reliable.
JUnit Annotations
JUnit offers following annotations to write tests.
@Before : The annotated method will be run before each test method in the test class.
@After : The annotated method will be run after each test method in the test class.
@BeforeClass : The annotated method will be run before all test methods in the test class. This method must be static.
@AfterClass : The annotated method will be run after all test methods in the test class. This method must be static.
@Test : It is used to mark a method as junit test
@Ignore : It is used to disable or ignore a test class or method from test suite.
@FixMethodOrder : This class allows the user to choose the order of execution of the methods within a test class.
@Rule : Annotates fields that reference rules or methods that return a rule.
@ClassRule : Annotates static fields that reference rules or methods that return them.
This is the basic of Junit.
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