Hello EasyMock

Main Learning's

• Download and install EasyMock
• Use EasyMock in Eclipse
• Create a EasyMock based Unit Test
• Compile and run the EasyMock based Unit Test

Versions used:

• Eclipse SDK 3.2.2
• JDKversion 1.5.0_12
• EasyMock 2.3

Assumptions:

 

 

The JDK is properly installed

You are familiar with Eclipse IDE fro Java

Tutorial Steps:

1. Go to http://www.easymock.org/Downloads.html
   1. 
2. Download a stable version of EasyMock – e.g easymock2.3
3. Extract easymock2.3.zip to a folder – e.g C:\Program Files\easymock  
4. Open Eclipse for Java IDE
5. Create a new project (name it helloEasyMock)
   1. 
   2. Click on Finish
6. Create a ITranslator interface
   1. 
   2. Make sure ITranslator interface has the following code
   3. package org.helloopensource.greetings;

       

      public interface ITranslator {

          public abstract String translate(String fromLanguage, String toLanguage, String word);

       

      }

       

       

7. Create a Greeting class
   1. 
   2. Make sure Greeting class has the following code
   3. package org.helloopensource.greetings;

       

      public class Greeting {

          private ITranslator translator;

          public Greeting(ITranslator translator) {

              this.translator = translator;

          }

       

          public String sayHello(String language, String name) {

              return translator.translate("English", language, "Hello") + " " + name;

          }

      }

8. Add the easymock.jar to the build path
   1. 
   2. Click on add external JARs
   3. Select the easymock.jar files (e.g C:\Program Files\easymock\easymock2.3\easymock.jar) 
9. Create a new Unit Test (new / Unit Test)
   1. 
   2. Click on finish
   3. Make sure JUnit library is added to the build path
   4. Add the following code for the GreetingTest code:
   5. package org.helloopensource.greetings;

       

      import static org.easymock.EasyMock.createMock;

      import static org.easymock.EasyMock.expect;

      import static org.easymock.EasyMock.replay;

      import static org.easymock.EasyMock.verify;

      import junit.framework.TestCase;

       

      public class GreetingTest extends TestCase {

          public void testGreetingInAnotherLanguage() throws Exception {

              ITranslator mockTranslator = createMock(ITranslator.class);

              Greeting greeting = new Greeting(mockTranslator);

              expect(mockTranslator.translate("English", "Hindi", "Hello")).andReturn("Namaste");

              replay(mockTranslator);

              assertEquals("Namaste Paulo", greeting.sayHello("Hindi", "Paulo"));

              verify(mockTranslator);

          }    

      } 

10. Run GreetingTest Unit Test
    1.