java.lang.AssertionError:junit Spring MVC Controller时未设置内容类型？

我正在使用JUnit来测试我的Spring MVC控制器.下面是我的方法,它返回一个index.jsp页面并Hello World在屏幕上显示 -

@RequestMapping(value = "index", method = RequestMethod.GET)
public HashMap handleRequest() {
    HashMap model = new HashMap();

    String name = "Hello World";
    model.put("greeting", name);

    return model;
}

以下是我对上述方法的JUnit测试:

public class ControllerTest {

    private MockMvc mockMvc;

    @Before
    public void setup() throws Exception {
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        viewResolver.setPrefix("/WEB-INF/views/");
        viewResolver.setSuffix(".jsp");

        this.mockMvc = standaloneSetup(new Controller()).setViewResolvers(viewResolver).build();
    }

    @Test
    public void test01_Index() throws Exception {

    mockMvc.perform(get("/index")).andExpect(status().isOk()).andExpect(content().contentType("application/json"))
        .andExpect(jsonPath("$.greeting").value("Hello World"));

    }
}

当我调试它时,junit上面运行正常但是当我运行junit时run as junit,它给了我这个错误 -

MockMvc : Circular view path [view]: would dispatch back to the current handler URL [/view] again

所以为了解决这个问题,我遵循了本教程,之后我得到了这个例外 -

java.lang.AssertionError: Content type not set
    at org.springframework.test.util.AssertionErrors.fail(AssertionErrors.java:39)
    at org.springframework.test.util.AssertionErrors.assertTrue(AssertionErrors.java:72)
    at org.springframework.test.web.servlet.result.ContentResultMatchers$1.match(ContentResultMatchers.java:75)
    at org.springframework.test.web.servlet.MockMvc$1.andExpect(MockMvc.java:141)
    at com.ebay.personalization.bullseye.zookeeper.test.ZookeeperControllerTest.test01_Index(ZookeeperControllerTest.java:32)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:76)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:602)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

我在这做错了什么？在.jsp页面上显示Hello World..

我在这里跟进我之前的问题