テンプレートによるEasyMockTestのシンプル化

/**
 * mock template
 * @author Jomper
 *
 */
public abstract class MockTemplate {
	private Object[] mocks;

	@Before
	public void setUp() throws Exception{
		mockFields(getClass(), this);
		expectAll();
	}

	@Test
	public void test() {
		replay(mocks);
		process();
		verify(mocks);
	}

	/**
	 * reflect itself get annotate fields that dynamic assigned to mock objects
	 * @param clazz
	 * @param test
	 * @throws Exception
	 */
	private void mockFields(Class<?> clazz, Object test) throws Exception {
		List<Object> _mocks = new ArrayList<Object>();
		for (Field field : clazz.getDeclaredFields()) {
			if (field.getAnnotation(Mock.class) != null) {
				try {
					field.setAccessible(true);
					Object o = createMock(field.getType());
					field.set(test, o);
					_mocks.add(o);
				} catch (IllegalArgumentException e) {
					throw new Exception(e.getMessage(),e);
				}
			}
		}
		mocks = _mocks.toArray();
	}

	public abstract void process();

	public abstract void expectAll();
}

/**
 * Response interface
 * @author Jomper
 *
 */
public interface Response {
	/**
	 * request handler
	 * @param request
	 * @return result
	 */
	public Object getResult(Request request);
}

/**
 * Request interface
 * @author Jomper
 *
 */
public interface Request {
	/**
	 * set request content
	 * @param o
	 */
	public void setRequest(Object o);
}

/**
 * Service sample
 * @author Jomper
 * 
 */
public class Service {
	/**
	 * you can do something before get result
	 * initial response result and filter special characters from request content
	 * @param request
	 * @param response
	 * @return
	 */
	public Object execute(Request request, Response response) {
		//TODO something before get result
		return response.getResult(request);
	}
}

/**
 * service test
 * @author Jomper
 *
 */
public class ServiceTest extends MockTemplate {
	@Mock private Request request;
	@Mock private Response response;
	private Service service;
	
	@Before
	public void before() throws Exception{
		service = new Service();
	}

	public void expectAll() throws Exception{
		request.setRequest("a cup of tea");
		request.setRequest("coffee");
		expect(response.getResult(request)).andReturn("Sorry").andReturn("OK");
	}

	/**
	 * if request.setRequest("a cup of tea"),response.getResult(request) return "Sorry"
	 * else return "OK"
	 */
	public void process() throws Exception{
		request.setRequest("a cup of tea");
		assertTrue("Sorry".equals(service.execute(request, response)));
		
		request.setRequest("coffee");
		assertTrue("OK".equals(service.execute(request, response)));
	}
}