Setup () and teardown () methods in JUnit Testing

The setup and teardown methods have been used for JUnit tests over the past few days. They can be understood simply in this way. Setup mainly implements initialization before the test, teardown mainly achieves garbage collection after testing.

Note that every test method in junit3 will execute them, instead of executing them once in a class, junit4 uses annotations to implement a class only once. Let's take a look at the test below.Code:

Jar:

Http://search.maven.org/#search%7Cgav%7C1%7Cg%3A%22junit%22%20AND%20a%3A%22junit%22

 

Junit3.8.1Version:

Import JUnit. framework. testcase; public class junittest extends testcase {@ overrideprotected void setup () throws exception {system. out. println ("set some prerequisites");} @ overrideprotected void teardown () throws exception {system. out. println ("release some resources");} public void testsomething1 () {system. out. println ("execution unit test testsomething1");} public void testsomething2 () {system. out. println ("execution unit test testsomething2 ");}}
 

Execution result:

Set some prerequisites

Execute unit test testsomething1

Release some resources

Set some prerequisites

Execute unit test testsomething2

Release some resources

 

Junit4.4Version:

Import Org. JUnit. afterclass; import Org. JUnit. beforeclass; import Org. JUnit. test; public class junittest4 {@ beforeclasspublic static void setupbeforeclass () throws exception {system. out. println ("set some prerequisites");} @ afterclasspublic static void teardownafterclass () throws exception {system. out. println ("release some resources") ;}@ testpublic void test1 () {system. out. println ("execution unit test test1") ;}@ testpublic void Test2 () {system. out. println ("execution unit test Test2 ");}}
 

Execution result:

Set some prerequisites

Execute unit test test1

Execute unit test Test2

Release some resources