ModelAndView returns null SpringBootTest
ModelAndView returns null SpringBootTest
我正在尝试使用 spring boot 学习 junit 测试。
通常我不会只询问空指针异常,但现在我找不到丢失的东西。
@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = WebEnvironment.MOCK)
@ActiveProfiles("dev")
@AutoConfigureMockMvc
@WithMockUser(username = "user", password = "secret", authorities = "USER")
public class OwnersWebMVCTests {
@Autowired
private MockMvc mockMvc;
@Test
public void testOwners() throws Exception {
MockHttpServletRequestBuilder requestBuilder = MockMvcRequestBuilders.get("/owners");
ResultActions resultActions = mockMvc.perform(requestBuilder);
MvcResult mvcResult = resultActions.andReturn();
ModelAndView mav = mvcResult.getModelAndView();
MatcherAssert.assertThat(mav.getViewName(), Matchers.equalTo("owners"));
MatcherAssert.assertThat(mav.getModel().containsKey("owners"), Matchers.is(true));
}
}
ModelAndView mav = mvcResult.getModelAndView();returns null.
这是我的错误堆栈。
{
java.lang.NullPointerException
at demo.petClinic.web.OwnersWebMVCTests.testOwners(OwnersWebMVCTests.java:40)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:73)
at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:83)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
at org.junit.runners.ParentRunner.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access[=12=]0(ParentRunner.java:58)
at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:538)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:760)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:460)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:206)
}
有什么帮助谢谢
问题与控制器有关,与测试无关。
可能的问题:您的控制器未被扫描!我这样说是因为您希望拥有相同的 GET url 和视图 "owners" => 这将失败,因为它将重定向到自身。
解决:请确保controller和springboot test有相同的包名或者导入配置扫描
所有者控制器 -> src/main/java/org.test
TestOwnerController -> src/test/java/org.test
相同的包名:org.test
如果你需要有不同的包名,你可以添加到你的测试中
@ComponentScan("org.owner")
-> 其中 org.owner 是 OwnerController
的包
改进:您可以将测试方法重写为
mockMvc.perform(get("/owners"))
.andExpect(model().attributeExists("owners"))
.andExpect(view().name("view"));
还请将返回视图的名称更改为不失败:
@GetMapping(value = "/owners")
public ModelAndView getOwnersView() {
return new ModelAndView("view", Collections.singletonMap("owners", new Object()));
}
我正在尝试使用 spring boot 学习 junit 测试。 通常我不会只询问空指针异常,但现在我找不到丢失的东西。
@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = WebEnvironment.MOCK)
@ActiveProfiles("dev")
@AutoConfigureMockMvc
@WithMockUser(username = "user", password = "secret", authorities = "USER")
public class OwnersWebMVCTests {
@Autowired
private MockMvc mockMvc;
@Test
public void testOwners() throws Exception {
MockHttpServletRequestBuilder requestBuilder = MockMvcRequestBuilders.get("/owners");
ResultActions resultActions = mockMvc.perform(requestBuilder);
MvcResult mvcResult = resultActions.andReturn();
ModelAndView mav = mvcResult.getModelAndView();
MatcherAssert.assertThat(mav.getViewName(), Matchers.equalTo("owners"));
MatcherAssert.assertThat(mav.getModel().containsKey("owners"), Matchers.is(true));
}
}
ModelAndView mav = mvcResult.getModelAndView();returns null.
这是我的错误堆栈。
{
java.lang.NullPointerException
at demo.petClinic.web.OwnersWebMVCTests.testOwners(OwnersWebMVCTests.java:40)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:73)
at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:83)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
at org.junit.runners.ParentRunner.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access[=12=]0(ParentRunner.java:58)
at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:538)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:760)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:460)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:206)
}
有什么帮助谢谢
问题与控制器有关,与测试无关。
可能的问题:您的控制器未被扫描!我这样说是因为您希望拥有相同的 GET url 和视图 "owners" => 这将失败,因为它将重定向到自身。
解决:请确保controller和springboot test有相同的包名或者导入配置扫描
所有者控制器 -> src/main/java/org.test
TestOwnerController -> src/test/java/org.test
相同的包名:org.test
如果你需要有不同的包名,你可以添加到你的测试中
@ComponentScan("org.owner")
-> 其中 org.owner 是 OwnerController
的包改进:您可以将测试方法重写为
mockMvc.perform(get("/owners"))
.andExpect(model().attributeExists("owners"))
.andExpect(view().name("view"));
还请将返回视图的名称更改为不失败:
@GetMapping(value = "/owners")
public ModelAndView getOwnersView() {
return new ModelAndView("view", Collections.singletonMap("owners", new Object()));
}