Spring integrated JUnit for unit testing and common exception resolution

Spring-test Dependency Packages

<!--spring-test -<!--https://mvnrepository.com/artifact/org.springframework/spring-test -<Dependency> 　　 <groupId>Org.springframework</groupId> 　　 <Artifactid>Spring-test</Artifactid> 　　 <version>4.3.7.RELEASE</version></Dependency>

1. Simple Unit Test

 Packagecom.ssm.test;Importjava.util.List;ImportJava.util.Map;Importorg.junit.Test;ImportOrg.junit.runner.RunWith;Importorg.springframework.beans.factory.annotation.Autowired;Importorg.springframework.test.context.ContextConfiguration;ImportOrg.springframework.test.context.junit4.SpringJUnit4ClassRunner;ImportCom.ssm.dao.UserMngDao;/**  * @authorWangxiangyu * @date: July 18, 2017 2:24:50 * Class Description: Spring unit Test * 1, Import spring-test Unit Test jar Package * 2, @ContextConfiguration (Loca tions={"Classpath:applicationContext.xml"}) specifies the location of the spring configuration file * 3, @RunWith (Springjunit4classrunner.class) Using Spring Unit Test * 3, directly autowired the components to be used*/@RunWith (Springjunit4classrunner.class) @ContextConfiguration (Locations={"Classpath:applicationContext.xml"}) Public classmappertest {@Autowired Usermngdao Usermngdao; @Test Public voidtest1 () {List<Map> users =Usermngdao.findall ();  for(Map user:users) {String staffname=NULL==user.get ("Staffname")? "": User.get ("Staffname"). toString ();        System.out.println (Staffname); }            }}

2. Analog front-end request Unit test

 Packagecom.atguigu.crud.test;Importjava.util.List;ImportOrg.junit.Before;Importorg.junit.Test;ImportOrg.junit.runner.RunWith;Importorg.springframework.beans.factory.annotation.Autowired;Importorg.springframework.mock.web.MockHttpServletRequest;Importorg.springframework.test.context.ContextConfiguration;ImportOrg.springframework.test.context.junit4.SpringJUnit4ClassRunner;Importorg.springframework.test.context.web.WebAppConfiguration;ImportORG.SPRINGFRAMEWORK.TEST.WEB.SERVLET.MOCKMVC;ImportOrg.springframework.test.web.servlet.MvcResult;Importorg.springframework.test.web.servlet.request.MockMvcRequestBuilders;Importorg.springframework.test.web.servlet.setup.MockMvcBuilders;ImportOrg.springframework.web.context.WebApplicationContext;ImportCom.atguigu.crud.bean.Employee;ImportCom.github.pagehelper.PageInfo;/*** Use the test request function provided by the Spring Test module to test the correctness of the curd request * SPRING4 Test requires servlet3.0 support *@authorLfy **/@RunWith (Springjunit4classrunner.class) @WebAppConfiguration @contextconfiguration (Locations= {"Classpath:applicationContext.xml", "File:src/main/webapp/web-inf/dispatcherservlet-servlet.xml" }) Public classMvctest {//the IOC passed into the SPRINGMVC@Autowired Webapplicationcontext context; //virtual MVC request, gets to the processing result. Mockmvc Mockmvc; @Before Public voidInitmokcmvc () {MOCKMVC=Mockmvcbuilders.webappcontextsetup (context). build (); } @Test Public voidTestpage ()throwsException {//The impersonation request gets the return valueMvcresult result = Mockmvc.perform (Mockmvcrequestbuilders.get ("/emps"). Param ("pn", "5") . Andreturn (); //after the request succeeds, there will be pageinfo in the request domain; we can remove the PageInfo for verification.Mockhttpservletrequest request =result.getrequest (); PageInfo Pi= (PageInfo) request.getattribute ("PageInfo"); System.out.println ("Current page number:" +pi.getpagenum ()); System.out.println ("Total page number:" +pi.getpages ()); System.out.println ("Total Records:" +pi.gettotal ()); System.out.println ("Page numbers that need to be displayed continuously in the pages"); int[] Nums =pi.getnavigatepagenums ();  for(inti:nums) {System.out.print (" "+i); }                //Get Employee Datalist<employee> list =pi.getlist ();  for(Employee employee:list) {System.out.println ("ID:" +employee.getempid () + "==>name:" +employee.getempname ()); }            }}

3. JUnit Common anomalies and solutions

Abnormal:
java.lang.IllegalStateException:Failed to load ApplicationContext

Workaround:
The java1.8 version only supports spring4.0 or more. So there are two ways to solve the problem: 1) Change the sping version to 4.0 or more, 2) lower the JDK. Here I choose to lower the JDK and run it again.

Abnormal:
Java.lang.noclassdeffounderror:org/junit/runners/model/multiplefailureexception

Workaround:
There is no multiplefailureexception class, it may be because your version is too low, please replace the latest version.

Abnormal:
Java.lang.Exception:No tests found matching [{Exactmatcher:fdisplayname=test_sayhello4]

Workaround:
Spring-test version is incompatible with the JUnit version, you can try several more versions.

Spring integrated JUnit for unit testing and common exception resolution