Unit Testing for the Controllor SpringBoot Java

Question

Need to do Unit Testing for the Controller part of the project but have got the error. Believe ModelAndVIew part cause the issue, even though I have mocked it and returned ModelAndView as it is return type of method. However, it does not work. Do not have any issue with Pom.xml, therefore, did not add it. ProjectController:

package com.bsptech.itcommunity.controller;

import com.bsptech.itcommunity.entity.Itproject;
import com.bsptech.itcommunity.service.inter.EmployeeProfileServiceInter;
import com.bsptech.itcommunity.service.inter.ItProjectServiceInter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.ModelAndView;

import java.util.List;

@Controller
@RequestMapping(value = "/projects")
public class ProjectController {

    @Autowired
    private ItProjectServiceInter itProjectServiceInter;

    @Autowired
    private EmployeeProfileServiceInter employeeProfileServiceInter;

    @RequestMapping(method = RequestMethod.GET, path = "/{projectId}")
    public ModelAndView detail(@PathVariable("projectId") Integer projectId, ModelAndView modelAndView) {
        Itproject itproject = itProjectServiceInter.findById(projectId);
       modelAndView.addObject("itproject", itproject);
        modelAndView.setViewName("project/details");
        return modelAndView;
    }

    @GetMapping
    public ModelAndView index(ModelAndView modelAndView) {
        List<Itproject> projectList = itProjectServiceInter.findAll();
        modelAndView.addObject("projectList", projectList);
        modelAndView.setViewName("project/index");
        return modelAndView;
    }

    @RequestMapping(value = "/join", method = RequestMethod.POST)
    public String joinTeam(@RequestParam("projectId") Integer projectId){

        int result= employeeProfileServiceInter.joinProject(projectId);
        if(result==2)
            return "redirect:/projects/"+projectId+"?alreadyjoined";
        else if(result==1)
            return "redirect:/projects/"+projectId+"?joinsuccess";
        else if(result==3)
            return "redirect:/projects/"+projectId+"?alreadysent";
        else
            return "redirect:/projects?error";
    }
}

ProjectControllerTest

@WebMvcTest(ProjectController.class)
@SpringBootTest
public class ProjectControllerTest {

    @Autowired
    MockMvc mockMvc;

    @MockBean
    private ItProjectServiceInter itProjectServiceInter;

    @MockBean
    private EmployeeProfileServiceInter employeeProfileServiceInter;

    @Mock
    ModelAndView modelAndView;

    @Test
    public void detail() throws Exception {
      OngoingStubbing resultItProject =  when(itProjectServiceInter.findById(1)).thenReturn(new Itproject(1));
        when(modelAndView.addObject(resultItProject)).thenReturn(new ModelAndView("project/details"));
        RequestBuilder request = MockMvcRequestBuilders.get("/{projectId}").accept(MediaType.APPLICATION_JSON);
        MvcResult result = mockMvc
                .perform(request)
                .andExpect(status().isOk())
                .andExpect(content().json("project/details"))
                .andReturn();
    }


}

Error Which I have found it: 
java.lang.NullPointerException
  at com.bsp.tech.it.community.controller.ProjectControllerTest.detail(ProjectControllerTest.java:44)
  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: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.runners.ParentRunner.runLeaf(ParentRunner.java:325)
  at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
  at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
  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$2.evaluate(ParentRunner.java:268)
  at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
  at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
  at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
  at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
  at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
  at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)

When I am using

@RunWith(SpringRunner.class)
@WebMvcTest(ProjectController.class)
public class ProjectControllerTest {

Getting an initialization error:

java.lang.IllegalStateException: Unable to find a @SpringBootConfiguration, you need to use @ContextConfiguration or @SpringBootTest(classes=...) with your test

at org.springframework.util.Assert.state(Assert.java:73) at org.springframework.boot.test.context.SpringBootTestContextBootstrapper.getOrFindConfigurationClasses(SpringBootTestContextBootstrapper.java:233) at org.springframework.boot.test.context.SpringBootTestContextBootstrapper.processMergedContextConfiguration(SpringBootTestContextBootstrapper.java:149) at org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTestContextBootstrapper.processMergedContextConfiguration(WebMvcTestContextBootstrapper.java:36) at org.springframework.test.context.support.AbstractTestContextBootstrapper.buildMergedContextConfiguration(AbstractTestContextBootstrapper.java:395) at org.springframework.test.context.support.AbstractTestContextBootstrapper.buildDefaultMergedContextConfiguration(AbstractTestContextBootstrapper.java:312) at org.springframework.test.context.support.AbstractTestContextBootstrapper.buildMergedContextConfiguration(AbstractTestContextBootstrapper.java:265) at org.springframework.test.context.support.AbstractTestContextBootstrapper.buildTestContext(AbstractTestContextBootstrapper.java:108) at org.springframework.boot.test.context.SpringBootTestContextBootstrapper.buildTestContext(SpringBootTestContextBootstrapper.java:98) at org.springframework.test.context.TestContextManager.(TestContextManager.java:139) at org.springframework.test.context.TestContextManager.(TestContextManager.java:124) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTestContextManager(SpringJUnit4ClassRunner.java:151) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.(SpringJUnit4ClassRunner.java:142) at org.springframework.test.context.junit4.SpringRunner.(SpringRunner.java:49) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:104) at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:86) at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59) at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26) at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59) at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:33) at org.junit.internal.requests.FilterRequest.getRunner(FilterRequest.java:36) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:49) at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33) at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230) at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)

And In the pom.xml Using this dependency:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
</dependency>

If you want to test a controller then @WebMvcTest is what you need, don't combine it with @SpringBootTest as that is intended for full integration tests. You use one or the other, not both. The second error probably indicates that the package of your test is not correct as no class annotated with @SpringBootAnnotation can be found by the test code. In which package is your test class? — Gimby

Mark Bramnik Mark Bramnik · Accepted Answer · 2020-02-17T10:00:18

You don't need to use both @WebMvcTest and @SpringBootTest.

Try:

@RunWith(SpringRunner.class)
@WebMvcTest(ProjectController.class)
public class ProjectControllerTest {
...
}

Unit Testing for the Controllor SpringBoot Java

1 Answers