Junit和EasyMock Servlet测试

Question

我在测试Servlet时遇到了一个问题。Bouncer是一个Servlet，带有简单的方法doPost和init，被我重写了。但是当我运行该代码时，我得到了异常

@Before
        public void Before() throws IOException, ServletException,
                InstantiationException, IllegalAccessException,
                IllegalArgumentException, InvocationTargetException,
                NoSuchMethodException, SecurityException, ClassNotFoundException {
            encoder = EasyMock.createMock(Encoder.class);
            EasyMock.expect(encoder.encode("password")).andReturn("asdf");
            EasyMock.expect(encoder.encode("nic")).andReturn("asss");
            EasyMock.expect(encoder.encode("Password")).andReturn("ass");
            EasyMock.replay(encoder);
            db = EasyMock.createMock(UserDataBase.class);
            db.connect();
            EasyMock.expect(db.isConnected()).andReturn(true);
            EasyMock.expect(db.getUserByLoginAndPassword("login", "asss"))
                    .andReturn(null);
            EasyMock.expect(db.getUserByLoginAndPassword("login", "asdf"))
                    .andReturn(new User("Rafal", "Machnik"));
            EasyMock.expect(db.getUserByLoginAndPassword("fake", "asdf"))
                    .andReturn(null);
            EasyMock.expect(db.getUserByLoginAndPassword("login", "ass"))
                    .andReturn(null);
            EasyMock.replay(db);

            lsf = EasyMock.createMock(LoginServiceFactory.class);
            EasyMock.expect(lsf.getEncoder()).andReturn(encoder).anyTimes();
            EasyMock.expect(lsf.getUserDataBase()).andReturn(db).anyTimes();
            EasyMock.replay(lsf);

            config = EasyMock.createMock(ServletConfig.class);
            EasyMock.expect(config.getInitParameter("LoginServiceFactory"))
                    .andReturn("pl.to.cw4.LoginServiceFactory");
            EasyMock.replay(config);

            request = EasyMock.createMock(HttpServletRequest.class);
            EasyMock.expect(request.getParameter("login")).andReturn("login")
                    .anyTimes();
            EasyMock.expect(request.getParameter("password")).andReturn("password")
                    .anyTimes();
            EasyMock.replay(request);

            pageSource = new StringWriter();

            response = EasyMock.createMock(HttpServletResponse.class);
            EasyMock.expect(response.getWriter())
                    .andReturn(new PrintWriter(pageSource)).anyTimes();
            EasyMock.replay(response);

            bouncer = new Bouncer(lsf);

            bouncer.init(config);

        }

        @Test
        public void bouncerTest() throws ServletException, IOException {
            bouncer.service(request, response);
            assertNotNull(pageSource.toString());

        }

java.lang.AssertionError:意外的方法调用getMethod()：在org.easymock.internal.MockInvocationHandler.invoke(MockInvocationHandler.java:32)...

如果有人知道如何修复它，我将不胜感激。

Answer 1

该错误表明easymock在模拟对象中遇到了调用getMethod()的方法。逐行调试程序，并为模拟对象添加一个expect调用。

如果不是模拟对象，则不必在expect中添加方法调用，但应将模拟对象中的所有调用添加到测试方法中。

getMethod()是在服务中调用的，由于您模拟的是HttpServletRequest，因此还需要模拟HttpServletRequest上的所有方法调用

Answer 2

service()方法根据请求调用getMethod()，以确定它是否必须调用doGet()、doPost()或其他servlet方法。因为您没有在模拟请求中存根这个对getMethod()的调用，所以EasyMock会抛出这个异常。

既然service()是您想要测试的方法，那么为什么不直接调用doPost()，而是调用它呢？