We will have an example to demonstrate how to run JUnit using ANT. Follow the steps given below.

Step 1: Download Apache Ant

Download Apache Ant based on the operating system you are working on.

Step 2: Set Ant Environment

Set the ANT_HOME environment variable to point to the base directory location, where the ANT libraries are stored on your machine. Let us assume the Ant libraries are stored in the folder apache-ant-1.8.4.

Append Ant compiler location to the System Path as follows −

Step 3: Download JUnit Archive

Download a JUnit Archive that suits your operating system.

Step 4: Create Project Structure

• Create a folder TestJunitWithAnt in C:>JUNIT_WORKSPACE.

• Create a folder src in C:>JUNIT_WORKSPACE>TestJunitWithAnt.

• Create a folder test in C:>JUNIT_WORKSPACE>TestJunitWithAnt.

• Create a folder lib in C:>JUNIT_WORKSPACE>TestJunitWithAnt.

• Create MessageUtil class in C:>JUNIT_WORKSPACE>TestJunitWithAnt> srcfolder.

/*
* This class prints the given message on console.
*/

public class MessageUtil {

   private String message;

   //Constructor
   //@param message to be printed
   public MessageUtil(String message){
      this.message = message; 
   }

   // prints the message
   public String printMessage(){
      System.out.println(message);
      return message;
   }   

   // add "Hi!" to the message
   public String salutationMessage(){
      message = "Hi!" + message;
      System.out.println(message);
      return message;
   }   
}  	

Create TestMessageUtil class in the folder C:>JUNIT_WORKSPACE>TestJunitWithAnt>src.

import org.junit.Test;
import org.junit.Ignore;
import static org.junit.Assert.assertEquals;

public class TestMessageUtil {

   String message = "Robert";	
   MessageUtil messageUtil = new MessageUtil(message);
   
   @Test
   public void testPrintMessage() {	
      System.out.println("Inside testPrintMessage()");     
      assertEquals(message,messageUtil.printMessage());
   }

   @Test
   public void testSalutationMessage() {
      System.out.println("Inside testSalutationMessage()");
      message = "Hi!" + "Robert";
      assertEquals(message,messageUtil.salutationMessage());
   }
}

Copy junit-4.10.jar onto the folder C:>JUNIT_WORKSPACE>TestJunitWithAnt>lib.

Create ANT Build.xml

We”ll be using <junit> task in Ant to execute our JUnit test cases.

<project name = "JunitTest" default = "test" basedir = ".">
   <property name = "testdir" location = "test" />
   <property name = "srcdir" location = "src" />
   <property name = "full-compile" value = "true" />
	
   <path id = "classpath.base"/>
	
   <path id = "classpath.test">
      <pathelement location = "lib/junit-4.10.jar" />
      <pathelement location = "${testdir}" />
      <pathelement location = "${srcdir}" />
      <path refid = "classpath.base" />
   </path>
	
   <target name = "clean" >
      <delete verbose = "${full-compile}">
         <fileset dir = "${testdir}" includes = "**/*.class" />
      </delete>
   </target>
	
   <target name = "compile" depends = "clean">
      <javac srcdir = "${srcdir}" destdir = "${testdir}" 
         verbose = "${full-compile}">
         <classpath refid = "classpath.test"/>
      </javac>
   </target>
	
   <target name = "test" depends = "compile">
      <junit>
         <classpath refid = "classpath.test" />
         <formatter type = "brief" usefile = "false" />
         <test name = "TestMessageUtil" />
      </junit>
   </target>
	
</project>

Run the following Ant command.

C:JUNIT_WORKSPACETestJunitWithAnt>ant

Verify the output.

Buildfile: C:JUNIT_WORKSPACETestJunitWithAntbuild.xml

clean:  

compile:  
   [javac] Compiling 2 source files to C:JUNIT_WORKSPACETestJunitWithAnttest
   [javac] [parsing started C:JUNIT_WORKSPACETestJunitWithAntsrc
      MessageUtil.java]
   [javac] [parsing completed 18ms]
   [javac] [parsing started C:JUNIT_WORKSPACETestJunitWithAntsrc
      TestMessageUtil.java]
   [javac] [parsing completed 2ms]
   [javac] [search path for source files: C:JUNIT_WORKSPACE
      TestJunitWithAntsrc]    
   [javac] [loading javalangObject.class(javalang:Object.class)]
   [javac] [loading javalangString.class(javalang:String.class)]
   [javac] [loading orgjunitTest.class(orgjunit:Test.class)]
   [javac] [loading orgjunitIgnore.class(orgjunit:Ignore.class)]
   [javac] [loading orgjunitAssert.class(orgjunit:Assert.class)]
   [javac] [loading javalangannotationRetention.class
      (javalangannotation:Retention.class)]
   [javac] [loading javalangannotationRetentionPolicy.class
      (javalangannotation:RetentionPolicy.class)]
   [javac] [loading javalangannotationTarget.class
      (javalangannotation:Target.class)]
   [javac] [loading javalangannotationElementType.class
      (javalangannotation:ElementType.class)]
   [javac] [loading javalangannotationAnnotation.class
      (javalangannotation:Annotation.class)]
   [javac] [checking MessageUtil]
   [javac] [loading javalangSystem.class(javalang:System.class)]
   [javac] [loading javaioPrintStream.class(javaio:PrintStream.class)]
   [javac] [loading javaioFilterOutputStream.class
      (javaio:FilterOutputStream.class)]
   [javac] [loading javaioOutputStream.class(javaio:OutputStream.class)]
   [javac] [loading javalangStringBuilder.class
      (javalang:StringBuilder.class)]
   [javac] [loading javalangAbstractStringBuilder.class
      (javalang:AbstractStringBuilder.class)]
   [javac] [loading javalangCharSequence.class(javalang:CharSequence.class)]
   [javac] [loading javaioSerializable.class(javaio:Serializable.class)]
   [javac] [loading javalangComparable.class(javalang:Comparable.class)]
   [javac] [loading javalangStringBuffer.class(javalang:StringBuffer.class)]
   [javac] [wrote C:JUNIT_WORKSPACETestJunitWithAnttestMessageUtil.class]
   [javac] [checking TestMessageUtil]
   [javac] [wrote C:JUNIT_WORKSPACETestJunitWithAnttestTestMessageUtil.class]
   [javac] [total 281ms]

test:
    [junit] Testsuite: TestMessageUtil
    [junit] Tests run: 2, Failures: 0, Errors: 0, Time elapsed: 0.008 sec
    [junit]
    [junit] ------------- Standard Output ---------------
    [junit] Inside testPrintMessage()
    [junit] Robert
    [junit] Inside testSalutationMessage()
    [junit] Hi!Robert
    [junit] ------------- ---------------- ---------------

BUILD SUCCESSFUL
Total time: 0 seconds