Junit basic annotation example

Annotations for Junit testing:

1. @Test: It is used to specify the test method.

2. @BeforeClass: It is used to specify that method will be called only once, before starting all the test cases.

3. @AfterClass: It is used to specify that method will be called only once, after finishing all the test cases.

4. @Before: It is used to specify that method will be called before each test case.

5. @After: It is used to specify that method will be called after each test case.

6. @Ignore: It is used to ignore the test case.

Example:

DivisionTestCase.java

import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Ignore;
import org.junit.Test;
 
/**
 * This is test case class for basic JUnit annotation use.
 * @author javawithease
 */
public class DivisionTestCase {
 //called only once, before starting all the test cases.
 @BeforeClass
 public static void beforeClass() {
    System.out.println("In beforeClass method.");
 }
 
 //called only once, after finishing all the test cases.
 @AfterClass
 public static void  afterClass() {
  System.out.println("In afterClass method");
 }
 
 //called before each test case.
 @Before
 public void before() {
    System.out.println("In before method");
 }
 
 //called after each test case.
 @After
 public void after() {
    System.out.println("In after method");
 }
 
 //define the test case.
 @Test
 public void testCase1() {
    System.out.println("In testCase1");
 }
 
 //define the test case.
 @Test
 public void testCase2() {
    System.out.println("In testCase2");
 }
 
 //ignore the test case.It will not execute.
 @Ignore
 @Test
 public void testCase3() {
    System.out.println("In testCase3");
 }
 
}

Output:

In beforeClass method.
In before method
In testCase1
In after method
In before method
In testCase2
In after method
In afterClass method

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