Running Selenium Scripts Using Junit

Hi All,

 Today i will be posting about use of Junit test framework and how to configure it with Selenium and run the test cases through it.
This post will be only for the beginners of Selenium/WebDriver/Junit. For the experts, any comments will be appreciated and will help us all in a constructive way.

Ok Lets start. Junit is unit test framework which can be used to run a java program in a particular way. Mainly designed for Developers and can be extended to use for functional testing when configured or used with Selenium like tool. So the bottom line is, Junit can run a java program which is designed as like a junit test case.

Any java program runs by the main method. junit runs by the @Test annotation. Annotation is a mechanism to tell junt runner that this is test case and run it. There are many such annotations present in junit to perform many operations. 

You need latest Junit jars to configured in the build path, if you are using selenium then Junit jars are already bundled with the Selenium Server jars.

Lets code now-:

package core.come.TestScripts;

import org.junit.Test;


public class TestJunit {
   
    @Test
    public void RunMyJunit(){
        System.out.println("Running Junit Test Case");
    }

}
 
When you run this, in the console, "Running Junit Test Case" will be printed. You can there is no Main method as it not a java application file but it is a junit test case program.

Junit runner checks for the @Test annotation and run the method which is associated with it. For those who want to use with Selenium, @Test method should contain the actual test case which you want to execute. You can have multiple number of @Test methods in a junit test case program.

Ok now let us see some other important annotations. See the below code

package core.come.TestScripts;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;


public class TestJunit {
   
    @Before
    public void RunBeforeTest(){
        System.out.println("Running this method before Test Method");
    }
   
    @Test
    public void RunMyJunit(){
        System.out.println("Running Junit Test Case");
    }
   
    @After
    public void RunAfterTest(){
        System.out.println("Running this method after Test Method");
    }

}

Console Output will be -:
Running this method before Test
Running Junit Test Case
Running this method after Test





Two new annotations added, @Before and @After to the above script. As it is name suggested @Before method will run before each @Test and @After will run after each @Test. That means if @Test method is more than one in the junit test case, then @Before and @After will be called for @Test method.




Consider a situation in Selenium, where you want to automate a web application having a login page, some pages to validate and then logout. For every page validation

You have to do a separated login and logout for every page validation in the application. It is the same as a manual tester do the task.
In that scenario, you need to take the help of @Before and @After. Create two methods login(userName,Pwd) and logout() and have it with @Before and @After annotation. 

Now run the junit test case, for each @Test method, the login and logout will be called. It is easy,isnt it?

So this is a very simple and descriptive explanation about using/running Junit test case. There are many such annotations present in junit using those you can perform many operations.

Here is a link to junit annotations, Do a self study, and will post some other complex annotations as well.

Please do not forget to leave a comment/suggestion so that We can all leverage from that.

Be tuned!!
Thanks!!