Springboot (5)---Unit test, global exception

Unit tests, Global exceptions

One, unit test1. Basic version

1, the introduction of relevant dependencies

<!--springboot Program Test dependent, if it is automatically created project default add -<Dependency><groupId>Org.springframework.boot</groupId><Artifactid>Spring-boot-starter-test</Artifactid><Scope>Test</Scope></Dependency>

2: Key Note:@RunWith @SpringBootTest

Importjunit.framework.TestCase;ImportOrg.junit.After;ImportOrg.junit.Before;Importorg.junit.Test;ImportOrg.junit.runner.RunWith;Importorg.springframework.boot.test.context.SpringBootTest;ImportOrg.springframework.test.context.junit4.SpringRunner; @RunWith (Springrunner.class)//The ground floor with JUnit Springjunit4classrunner@SpringBootTest(Classes={springbootstudyapplication.class})//start the entire Springboot project Public classSpringboottestdemo { @Test  Public voidTestone () {System.out.println ("Test Hello 1"); Testcase.assertequals (1, 1); } @Test  Public voidTesttwo () {System.out.println ("Test Hello 2"); Testcase.assertequals (1, 1); } @Before  Public voidTestbefore () {System.out.println ("Before"); } @After  Public voidTestafter () {System.out.println ("After"); }    }

Output Result:

2.MOCKMVC

Use of the Mockmvc class and simulated HTTP request combat

TestController

Import org.springframework.web.bind.annotation.RequestMapping; Import Org.springframework.web.bind.annotation.RestController; @RestController  Public class TestController {        @RequestMapping ("/vq/test")    public  String  gettest () {                return"I am the Test return value";    }}

Mockmvctestdemo

Importorg.junit.Test;ImportOrg.junit.runner.RunWith;Importorg.springframework.beans.factory.annotation.Autowired;ImportORG.SPRINGFRAMEWORK.BOOT.TEST.AUTOCONFIGURE.WEB.SERVLET.AUTOCONFIGUREMOCKMVC;Importorg.springframework.boot.test.context.SpringBootTest;ImportOrg.springframework.test.context.junit4.SpringRunner;ImportORG.SPRINGFRAMEWORK.TEST.WEB.SERVLET.MOCKMVC;ImportOrg.springframework.test.web.servlet.MvcResult;Importorg.springframework.test.web.servlet.request.MockMvcRequestBuilders;Importorg.springframework.test.web.servlet.result.MockMvcResultMatchers;/*** Function Description: Test MOCKMVC class **/@RunWith (Springrunner.class)//The ground floor with JUnit Springjunit4classrunner@SpringBootTest (classes={springbootstudyapplication.class})//start the entire Springboot project@AutoConfigureMockMvc Public classMockmvctestdemo {@AutowiredPrivateMockmvc Mockmvc; @Test Public voidApitest ()throwsException {mvcresult Mvcresult= Mockmvc.perform (Mockmvcrequestbuilders.get ("/vq/test") ).        Andexpect (Mockmvcresultmatchers.status (). IsOk ()). Andreturn (); intStatus =mvcresult.getresponse (). GetStatus ();            SYSTEM.OUT.PRINTLN (status); }}

Result: 200 status code returned

Summary, Key notes:

@RunWith (Springrunner.class)  Lower layer with JUnit  springjunit4classrunner@SpringBootTest(Classes={springbootstudyapplication.class})// Start the entire Springboot project

Second, configure global exceptions

First, it is unfriendly to springboot the exception.

Example

@RequestMapping (value = "/api/v1/test_ext")        Public Object Index () {        int i= 1/0;         return New New Date ());    }

page

1. Configuring Global Exceptions

ImportJava.util.HashMap;ImportJava.util.Map;Importjavax.servlet.http.HttpServletRequest;ImportOrg.slf4j.Logger;Importorg.slf4j.LoggerFactory;ImportOrg.springframework.web.bind.annotation.ExceptionHandler;ImportOrg.springframework.web.bind.annotation.RestControllerAdvice; //Add global exception annotations @RestControllerAdvice  Public classCustomexthandler {Private Static FinalLogger LOG = Loggerfactory.getlogger (Customexthandler.class); //captures global exceptions and handles all unknown exceptions   @ExceptionHandler(Value=exception.class)    //@ResponseBodyObject handleexception (Exception e,httpservletrequest request) {Log.error ("URL {}, msg {}", Request.getrequesturl (), E.getmessage ()); Map<string, object> map =NewHashmap<>(); Map.put ("Code", 100); Map.put ("MSG", E.getmessage ()); Map.put ("url", Request.getrequesturl ()); returnmap; }    }

look at the page:

Key notes:

@RestControllerAdvice  //Global annotations

@ExceptionHandler(Value=exception.class) //Catch different exceptions, where catch is Exception exception, you can also specify other exceptions

2. Custom Exceptions

In Java, you can customize exceptions. Here are some things to keep in mind when writing your own exception classes.

• All exceptions must be subclasses of Throwable .
• If you want to write an inspection exception class, you need to inherit the Exception class.
• If you want to write a run-time exception class, you need to inherit the RuntimeException class.

1. Custom myexception exceptions

/*** Function Description: Custom Exception class **/ Public classMyExceptionextendsRuntimeException {Private Static Final LongSerialversionuid = 1L;  Publicmyexception (string code, String msg) { This. Code =Code;  This. msg =msg; }    PrivateString Code; PrivateString msg;  PublicString GetCode () {returnCode; }     Public voidSetcode (String code) { This. Code =Code; }     PublicString getmsg () {returnmsg; }     Public voidsetmsg (String msg) { This. msg =msg; }}

Controller class

     /**     * Function Description: Simulate custom exception     *    /@RequestMapping ("/api/v1/myext")      Public Object Myexc () {        //throws an exception        directly  throw the new myexception ("499", "my Ext exception ");        }

Page

Think too much, do too little, the middle of the gap is trouble. Want to have no trouble, either don't think, or do more. Captain "7"

Springboot (5)---Unit test, global exception