mvc.perform（）のjava.lang.NullPointerExceptionを取得します。

私は春のブート時に単体テストになっています。私はサービスをテストしようとしており、そのためにMockitoを使っています。 mvc.perform（）を実行すると、null値が返されます。私はwhen（）を使用して返すものを指定しました。しかし、なぜそれが失敗するか分からない。貴重な情報を提供してください。ここでFEスニペットは、次のとおりです。ここでmvc.perform（）のjava.lang.NullPointerExceptionを取得します。

@Test 
public void testAll() throws Exception { 

    /*Mockito.when(sensorDao.findAll()).thenReturn((Iterable<Sensor>) s2); 
    assertEquals(200,expect().statusCode(200));*/ 

    Collection<Sensor>list = getEntityListStubData(); 
    when(sensorserviceimpl.findAll()).thenReturn(list); 
    when(sensorService.findAll()).thenReturn(list); 
    when(sensorDao.findAll()).thenReturn(list); 
    String uri="/sensor"; 
    //System.out.print("gfnjhkjjhhg"); 
    System.out.println("Helllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllloooooooooooooooooooooooooooooooooooooooooooo"); 
    System.out.println(MockMvcRequestBuilders.get(uri).accept(MediaType.APPLICATION_JSON)); 
    MvcResult result = mvc.perform(MockMvcRequestBuilders.get(uri).accept(MediaType.APPLICATION_JSON)).andReturn(); 
    String content = result.getResponse().getContentAsString(); 
    int status = result.getResponse().getStatus(); 
}

が出力されます。ここでは

2017-08-18 19:11:45.030 INFO 21424 --- [   main] o.s.t.c.transaction.TransactionContext : Rolled back transaction for test context [[email protected] testClass = SensorServiceStandaloneApplicationTests, testInstance = com.bny.sr.[email protected]482cd91f, testMethod = [email protected], testException = java.lang.NullPointerException, mergedContextConfiguration = [[email protected] testClass = SensorServiceStandaloneApplicationTests, locations = '{}', classes = '{class com.bny.sr.sensorservicestandalone.SensorServiceStandaloneApplication}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{eureka.client.enabled:false, org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true, server.port=0}', contextCustomizers = set[org.sp[email protected]167fdd33, org.springfr[email protected]53f65459, org.springframework.boot.test.json.DuplicateJsonObje[email protected]74650e52, org.[email protected]0, org.springframework.boot[email protected]0, org.springframework.boot.test.autocon[email protected]80503], resourceBasePath = 'src/main/webapp', contextLoader = 'org.springframework.boot.test.context.SpringBootContextLoader', parent = [null]]]. 

java.lang.NullPointerException 
    at com.bny.sr.sensorservicestandalone.SensorServiceStandaloneApplicationTests.testAll(SensorServiceStandaloneApplicationTests.java:163) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:497) 
    at org.junit.runners.model.FrameworkMethod$1.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.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) 
    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:252) 
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94) 
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) 
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) 
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) 
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) 
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) 
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) 
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) 
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363) 
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191) 
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137) 
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) 
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47) 
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242) 
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70) 

2017-08-18 19:11:45.046 INFO 21424 --- [  Thread-5] ationConfigEmbeddedWebApplicationContext : Closing org.springframework.boot[email protected]5386659f: startup date [Fri Aug 18 19:11:34 IST 2017]; root of context hierarchy 
2017-08-18 19:11:45.054 INFO 21424 --- [  Thread-5] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default' 

Process finished with exit code -1

は、デバッグ結果は次のとおりです。

Debug results

出典

2017-08-18 Saurav Rath

春ブート1.4.0ので、あなたが@WebMvcTestた意志を使用することができます自動構成MockMvc。また、@MockBeanを使用して、コントローラの依存関係をモックしてください。

@RunWith(SpringRunner.class) 
@WebMvcTest(MyController.class) 
public class MyControllerTest { 

    @Autowired 
    private MockMvc mvc; 

    @MockBean 
    private SensorDao sensorDao; 

}

出典

2017-08-18 14:27:52

あなたの答えは私にとって正しい方向を示しました。 @AutoConfigureMockMvcが私のために働いた。 MockMvcは自動設定が必要です。どうもありがとうございました。 :-) –

mvc.perform（）のjava.lang.NullPointerExceptionを取得します。

答えて

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