<dependency>  
	<groupId>junit</groupId>  
	<artifactId>junit</artifactId>  
	<version>4.8</version>  
	<scope>test</scope>  
</dependency> 

mvn eclipse:eclipse

[INFO] Scanning for projects...
[INFO] Searching repository for plugin with prefix: 'eclipse'.
[INFO] ------------------------------------------------------------------------
[INFO] Building dev-et-tests
[INFO]    task-segment: [eclipse:eclipse]
[INFO] ------------------------------------------------------------------------
[INFO] Preparing eclipse:eclipse
[INFO] No goals needed for project - skipping
[INFO] [eclipse:eclipse {execution: default-cli}]
[INFO] Using Eclipse Workspace: null
[INFO] Adding default classpath container: org.eclipse.jdt.launching.JRE_CONTAINER
[INFO] File D:\javadev\article\developpez.com\dev-et-tests\.project already exists.
       Additional settings will be preserved, run mvn eclipse:clean if you want old settings to be removed.
[INFO] Wrote Eclipse project for "dev-et-tests" to D:\javadev\article\developpez.com\dev-et-tests.
[INFO]
       Sources for some artifacts are not available.
       Please run the same goal with the -DdownloadSources=true parameter in order to check remote repositories for sources.
       List of artifacts without a source archive:
         o junit:junit:4.8.1

       Javadoc for some artifacts is not available.
       Please run the same goal with the -DdownloadJavadocs=true parameter in order to check remote repositories for javadoc.
       List of artifacts without a javadoc archive:
         o junit:junit:4.8.1

[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESSFUL
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2 seconds
[INFO] Finished at: Tue Dec 28 20:17:12 CET 2010
[INFO] Final Memory: 8M/21M
[INFO] ------------------------------------------------------------------------

public interface Calculette {
	int add(int a, int b);
	int multiply(int a, int b);
}

import junit.framework.Assert;

import org.junit.Test;

public class CalculetteTestCase {
	private Calculette calculette;

	@Test
	public void testAdd() {
		final int a = 2;
		final int b = 3;

		int result = calculette.add(a, b);

		Assert.assertEquals(5, result);
	}

	@Test
	public void testMultiply() {
		final int a = 2;
		final int b = 3;

		int result = calculette.multiply(a, b);

		Assert.assertEquals(6, result);
	}
}

public class DefaultCalculette implements Calculette {

	@Override
	public int add(int a, int b) {
		return a + b;
	}

	@Override
	public int multiply(int a, int b) {
		return a * b;
	}
}	

public class CalculetteTestCase {

	private Calculette calculette;

	@Before
	public void setUp() {
		calculette = new DefaultCalculette();
	}