Does Junit reinitialize the class with each test method invocation?

Question

When i run the below code, both test cases come true:

import static junit.framework.Assert.assertEquals;

import org.junit.Test;

public class MyTest{
    pr         


        

Answer 1

New Instance of MyTest for each test method

For each test method a new instance of MyTest will be created this is the behavior of Junit.

So in your case for both methods the variable count will have value 1, and thus the value of count++ will be 2 for both the test methods and hence the test cases pass.

public class MyTest{
   public MyTest(){
      // called n times
      System.out.println("Constructor called for MyTest");
   }

   @Before //called n times
   public void setUp(){
      System.out.println("Before called for MyTest");
   }

   //n test methods
}

If you execute the code above with 2 test methods:

Output will be:

Constructor called for MyTest
Before called for MyTest
//test execution
Constructor called for MyTest
Before called for MyTest