我正在尝试使用 JUnit 为以下 Controller 代码编写一个测试用例。 但我收到 500 strip 有空指针异常的代码。 (当我在Postman上测试这个时,它可以正常工作,没有任何异常。)我认为validEmp的HttpServeleRequest请求可能会导致testGetMethod出现这个空指针异常。任何人都可以告诉我这里做错了什么以及如何解决这个问题吗?谢谢您的帮助:D
登录服务
public ReturnParam validEmp(HttpServletRequest request, String locale, String empKey, String accessToken) throws Exception {
ReturnParam rp = new ReturnParam();
rp.setFail("not available");
return rp;
}
登录 Controller
@RequestMapping(value = "/valid", method = RequestMethod.GET, produces = "application/json; charset=UTF-8")
public @ResponseBody ReturnParam validEmp(HttpServletRequest request,
@RequestParam(value = "locale", required = true) String locale,
@RequestParam(value = "empKey", required = true) String empKey,
@RequestParam(value = "accessToken", required = true) String accessToken) throws Exception {
return service.validEmp(request, locale, empKey, accessToken);
}
登录 Controller 测试
public MockMvc mockMvc;
private MediaType contentType = new MediaType(MediaType.APPLICATION_JSON.getType(),
MediaType.APPLICATION_JSON.getSubtype(), Charset.forName("utf8"));
public void testGetMethod(String url, String locale, String empKey, String acessToken) throws Exception {
mockMvc.perform(get(url).param("locale", locale).param("empKey",empKey).param("accessToken", acessToken))
.andDo(print())
.andExpect(status().isOk());
}
控制台
java.lang.NullPointerException
at com.isu.ifm.hr.control.LoginController.validEmp(LoginController.java:69)
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:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:776)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:705)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
at org.springframework.test.web.servlet.TestDispatcherServlet.service(TestDispatcherServlet.java:65)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.springframework.mock.web.MockFilterChain$ServletFilterProxy.doFilter(MockFilterChain.java:167)
at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:134)
at org.springframework.test.web.servlet.MockMvc.perform(MockMvc.java:144)
at com.isu.ifm.HttpMethodUnitTest.testGetMethod(HttpMethodUnitTest.java:21)
at com.isu.ifm.testcase.LoginControllerTest.TestCaseMain(LoginControllerTest.java:38)
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:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
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:73)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:82)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:73)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:224)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:83)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:68)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:163)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:89)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:541)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:763)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:463)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:209)
MockHttpServletRequest:
HTTP Method = GET
Request URI = /certificate/valid
Parameters = {locale=[ko_KR], empKey=[ISU_ST@18017], accessToken=[]}
Headers = {}
Handler:
Type = com.isu.ifm.hr.control.LoginController
Method = public com.pb.common.vo.ReturnParam com.isu.ifm.hr.control.LoginController.validEmp(javax.servlet.http.HttpServletRequest,java.lang.String,java.lang.String,java.lang.String) throws java.lang.Exception
Async:
Async started = false
Async result = null
Resolved Exception:
Type = java.lang.NullPointerException
ModelAndView:
View name = jsonView
View = null
Attribute = status
value = FAIL
Attribute = message
value = null
FlashMap:
MockHttpServletResponse:
Status = 500
Error message = null
Headers = {}
Content type = null
Body =
Forwarded URL = jsonView
Redirected URL = null
Cookies = []
INFO : org.springframework.context.support.GenericApplicationContext - Closing org.springframework.context.support.GenericApplicationContext@5abca1e0: startup date [Thu Nov 01 16:46:45 KST 2018]; root of context hierarchy
INFO : org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor - Shutting down ExecutorService 'taskExecutor'
最佳答案
您需要在 LoginController 中模拟您的 LoginService。尝试将这样的代码添加到 LoginControllerTest 中。
@Mock
private LoginService loginService;
@InjectMocks
private LoginController loginController;
@Before
public void init(){
MockitoAnnotations.initMocks(this);
mockMvc = MockMvcBuilders
.standaloneSetup(loginController)
.build();
}
关于使用 jUnit 测试 RESTful Api 时出现 java.lang.NullPointerException,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53098508/