Testing Spring Boot REST json result - spring

Question

I have some problem with checking json result
UserControllerTest class
package com.serwis.controller;
import com.serwis.PraktykiApplication;
import com.serwis.model.User;
import com.serwis.repository.UserRepository;
import org.hamcrest.Matchers;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mockito;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.SpringApplicationConfiguration;
import org.springframework.boot.test.TestRestTemplate;
import org.springframework.boot.test.WebIntegrationTest;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.web.client.RestTemplate;
import static org.hamcrest.Matchers.is;
import static org.junit.Assert.*;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
import static org.springframework.test.web.servlet.setup.MockMvcBuilders.standaloneSetup;
#RunWith(SpringJUnit4ClassRunner.class)
#SpringApplicationConfiguration(PraktykiApplication.class)
#WebIntegrationTest
public class UserControllerTests {
#Autowired
private UserRepository userRepository;
User user;
private MockMvc mockMvc;
#Before
public void setUp(){
user = new User("login1","password","email");
userRepository.deleteAll();
userRepository.save(user);
this.mockMvc = standaloneSetup(new UserController()).build();
}
#Test
public void createUser() throws Exception {
this.mockMvc.perform(get("/user/findall/").accept(MediaType.parseMediaType("application/json;charset=UTF-8")))
.andExpect(status().isOk())
.andExpect(content().contentType("application/json;charset=UTF-8"))
.andExpect(jsonPath("$.login", is("login1")));
System.out.println(userRepository.findAll());
}
}
User class
package com.serwis.model;
import javax.persistence.*;
import java.util.Arrays;
import java.util.Set;
#Entity
#Table(name="User")
public class User {
#Id
#GeneratedValue(strategy= GenerationType.AUTO)
#Column(name="id")
private long id;
#Column(name="login")
private String login;
#Column(name="password")
private String password;
#Column(name="email")
private String email;
#Column(name="avatar")
private byte[] avatar;
public User(){}
public User(String login, String password, String email) {
this.login = login;
this.password = password;
this.email = email;
}
#Override
public String toString() {
return "User{" +
"id=" + id +
", login='" + login + '\'' +
", password='" + password + '\'' +
", email='" + email + '\'' +
", avatar=" + Arrays.toString(avatar) +
'}';
}
public long getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getLogin() {
return login;
}
public void setLogin(String login) {
this.login = login;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public byte[] getAvatar() {
return avatar;
}
public void setAvatar(byte[] avatar) {
this.avatar = avatar;
}
}
UserRepository class
package com.serwis.repository;
import com.serwis.model.User;
import org.springframework.data.repository.CrudRepository;
import org.springframework.transaction.annotation.Transactional;
#Transactional
public interface UserRepository extends CrudRepository<User, Long>{
}
userController class
package com.serwis.controller;
import com.serwis.model.User;
import com.serwis.repository.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
/**
* Created by Jodanpotasu on 2016-07-24.
*/
#Controller
public class UserController {
#Autowired
private UserRepository userRepository;
#RequestMapping("/user/create")
#ResponseBody
public String create(String email, String login, String password) {
String userId = "";
try {
User user = new User(email, login, password);
userRepository.save(user);
userId = String.valueOf(user.getId());
} catch (Exception ex) {
return "Error creating the user: " + ex.toString();
}
return "User succesfully created with id = " + userId;
}
#RequestMapping("/user/findall/")
#ResponseBody
public Iterable<User> findAll() {
return userRepository.findAll();
}
#RequestMapping("/user/delete")
#ResponseBody
public String delete(long id) {
User deleted = userRepository.findOne(id);
userRepository.delete(id);
return "USER DELETED: " + deleted;
}
#RequestMapping("/user/update")
#ResponseBody
public String update(long id, String login, String password, String email) {
User beforeUpdate = userRepository.findOne(id);
User afterUpdate = userRepository.findOne(id);
afterUpdate.setLogin(login);
afterUpdate.setEmail(email);
afterUpdate.setPassword(password);
return "BEFORE UPDATE: \n" + beforeUpdate + " <br> AFTER UPDATE: " + afterUpdate;
}
}
it should be like
[{"id":1,"login":"login1","password":"password","email":"email","avatar":null}]
But i still have error output
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.NullPointerException
and that is full output
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.NullPointerException
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:979)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:858)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843)
at org.springframework.test.web.servlet.TestDispatcherServlet.service(TestDispatcherServlet.java:65)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
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:155)
at com.serwis.controller.UserControllerTests.createUser(UserControllerTests.java:56)
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.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:254)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89)
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:193)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:117)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:253)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:84)
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 com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: java.lang.NullPointerException
at com.serwis.controller.UserController.findAll(UserController.java:37)
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:136)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:832)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:743)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:961)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:895)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967)
... 43 more
Spring boot version: 1.3.6 is there another better way to test json?

Answer 1

Here is my working class
#RunWith(SpringJUnit4ClassRunner.class)
#SpringApplicationConfiguration(PraktykiApplication.class)
#WebIntegrationTest
public class UserControllerTests {
#Autowired
private UserRepository userRepository;
User user;
private MockMvc mockMvc;
#Autowired
UserController userController;
#Before
public void setUp(){
user = new User("login1","password","email");
userRepository.deleteAll();
userRepository.save(user);
this.mockMvc = standaloneSetup(userController).build();
}
#Test
public void createUser() throws Exception {
this.mockMvc.perform(get("/user/findall/").accept(MediaType.parseMediaType("application/json;charset=UTF-8")))
.andExpect(status().isOk())
.andExpect(content().contentType("application/json;charset=UTF-8"))
.andExpect(jsonPath("$[0].login", is("login1")));
System.out.println(userRepository.findAll());
}
}
it seems that spring boot did not see
this.mockMvc = standaloneSetup(new UserController()).build();