JUnit
JUnit Annotations Tutorial with Example
What is JUnit Annotations? JUNIT ANNOTATIONS is a special form of syntactic meta-data that can be...
Installing Junit is a 6 part process. It is explained in detailed below-
JUnit is a Testing framework used to test Java based application. So before installing JUnit, you need to configure or verify java development kit (JDK) in your machine.
Click this tutorial to download and install Java
Step 1) Visit https://junit.org/junit4/ and click Download and Install
Step 2) Click junit.jar
Step 3) In the central repository you are shown all versions of Junit that can be downloaded. Usually, you will select the latest version. Click on jar link to download Junit version 4.12 as shown below
Step 4) Visit https://github.com/junit-team/junit4/wiki/Download-and-Install again. Click hamcrest-core.jar
Step 5) Download the Jar
For JUnit installation, you need JUnit jars, and you can download the desired version of JUnit jar file from JUnit official youbsite http://www.junit.org
Here is the jars list:
Step 1) You need to set JUNIT_HOME environment variable to point out the base location where you have placed JUnit Jars.
For example, if you have created a JUnit folder in c: drive and placed jars there, then for environment settings you need to open control panel ->advanced ->environment variable.
When you click on new button in environment variables, it will open another window
Step 2) A "New System Variable" window will open:
When you click on OK, it will create a new system variable with the given name and value. Which you can verify in environment variable window as shown in step 1 image.
Step 3) After creating JUNIT_HOME, create another variable with the name CLASSPATH. Again go to Environment Variables and follow the below steps.
Step 4) In this step, point out JUNIT_HOME to JUnit.jar which is placed in JUnit folder as given below:
Step 5) Once you click on the 'OK' button, you can verify that a new environment variable named "CLASSPATH" can be seen under system variable. See below
Step 1) Right click on project:
Step 2) In this step,
After adding a JUnit.jar file, click on 'OK' button to close java build path window.
In order to verify JUnit jar file in eclipse, you need to follow below-mentioned steps:
Step 2) Java build path window will appear as shown below.
In that window, go to Libraries tab to see all jar files. In jar file tree view, you need to look for the jar file name which is starting with JUnit.
Once you expand JUnit libraries, you can see java libraries as shown below:
Now you are ready to use JUnit with eclipse.
You can create a simple JUnit test to verify JUnit setup. See below test class:
Step 1) Create a java class named TestJUnit.java and provide a simple assert statement.
package guru99.junit; import org.junit.Test; import static org.junit.Assert.assertEquals; public class TestJunit { @Test public void testSetup() { String str= "I am done with Junit setup"; assertEquals("I am done with Junit setup",str); } }
Step 2) Create a Test Runner class to execute above test.
package guru99.junit; import org.junit.runner.JUnitCore; import org.junit.runner.Result; import org.junit.runner.notification.Failure; public class TestRunner { public static void main(String[] args) { Result result = JUnitCore.runClasses(TestJunit.class); for (Failure failure : result.getFailures()) { System.out.println(failure.toString()); } System.out.println("Result=="+result.wasSuccessful()); } }
Step 3) To execute the test, follow below steps:
Step 4) Here is the output or result for your test. If it is successfully executed, it will show a green check mark in front of it.
Click to download the above code for your testing purposes.
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