JUnit에서 메소드가 정적이어야한다는 충돌이 발생하고 충돌이 발생하면 충돌하면 안됩니다.

Question

두 가지를 테스트하고 teardown을하는 JUnit에서 간단한 예제 테스트를하려고합니다. 내가 이것을 실행하려고하면

import org.junit.*; 

public class TestFoobar { 
    @Test 
    public void testOneThing() { 
     // Code that tests one thing 
    } 

    @Test 
    public void testAnotherThing() { 
     // Code that tests another thing 
    } 

    @AfterClass 
    @Test 
    public void tearDownClass() throws Exception { 
     // Code executed after the last test method 
    } 
} 

, 그것은 tearDownClass 정적이어야 말하는 충돌이 :

이

$ javac TestFoobar.java -cp junit-4.8.2.jar 
$ java -cp junit-4.8.2.jar:. org.junit.runner.JUnitCore TestFoobar 
JUnit version 4.8.2 
.E 
Time: 0.01 
There was 1 failure: 
1) initializationError(TestFoobar) 
java.lang.Exception: Method tearDownClass() should be static 
    at org.junit.runners.model.FrameworkMethod.validatePublicVoid(FrameworkMethod.java:83) 
    at org.junit.runners.model.FrameworkMethod.validatePublicVoidNoArg(FrameworkMethod.java:66) 
    at org.junit.runners.ParentRunner.validatePublicVoidNoArgMethods(ParentRunner.java:122) 
    at org.junit.runners.ParentRunner.collectInitializationErrors(ParentRunner.java:104) 
    at org.junit.runners.BlockJUnit4ClassRunner.collectInitializationErrors(BlockJUnit4ClassRunner.java:119) 
    at org.junit.runners.ParentRunner.validate(ParentRunner.java:269) 
    at org.junit.runners.ParentRunner.<init>(ParentRunner.java:66) 
    at org.junit.runners.BlockJUnit4ClassRunner.<init>(BlockJUnit4ClassRunner.java:58) 
    at org.junit.internal.builders.JUnit4Builder.runnerForClass(JUnit4Builder.java:13) 
    at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57) 
    at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:29) 
    at org.junit.runner.Computer.getRunner(Computer.java:38) 
    at org.junit.runner.Computer$1.runnerForClass(Computer.java:29) 
    at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57) 
    at org.junit.runners.model.RunnerBuilder.runners(RunnerBuilder.java:93) 
    at org.junit.runners.model.RunnerBuilder.runners(RunnerBuilder.java:84) 
    at org.junit.runners.Suite.<init>(Suite.java:79) 
    at org.junit.runner.Computer.getSuite(Computer.java:26) 
    at org.junit.runner.Request.classes(Request.java:69) 
    at org.junit.runner.JUnitCore.run(JUnitCore.java:117) 
    at org.junit.runner.JUnitCore.runMain(JUnitCore.java:98) 
    at org.junit.runner.JUnitCore.runMainAndExit(JUnitCore.java:53) 
    at org.junit.runner.JUnitCore.main(JUnitCore.java:45) 

FAILURES!!! 
Tests run: 1, Failures: 1 

그래서 내가 정적에 tearDownClass을 변경할 수 있지만 지금은 정적 안 말한다 :

$ javac TestFoobar.java -cp junit-4.8.2.jar 
$ java -cp junit-4.8.2.jar:. org.junit.runner.JUnitCore TestFoobar 
JUnit version 4.8.2 
.E 
Time: 0.01 
There was 1 failure: 
1) initializationError(TestFoobar) 
java.lang.Exception: Method tearDownClass() should not be static 
    at org.junit.runners.model.FrameworkMethod.validatePublicVoid(FrameworkMethod.java:83) 
    at org.junit.runners.model.FrameworkMethod.validatePublicVoidNoArg(FrameworkMethod.java:66) 
    at org.junit.runners.ParentRunner.validatePublicVoidNoArgMethods(ParentRunner.java:122) 
    at org.junit.runners.BlockJUnit4ClassRunner.validateTestMethods(BlockJUnit4ClassRunner.java:200) 
    at org.junit.runners.BlockJUnit4ClassRunner.validateInstanceMethods(BlockJUnit4ClassRunner.java:174) 
    at org.junit.runners.BlockJUnit4ClassRunner.collectInitializationErrors(BlockJUnit4ClassRunner.java:122) 
    at org.junit.runners.ParentRunner.validate(ParentRunner.java:269) 
    at org.junit.runners.ParentRunner.<init>(ParentRunner.java:66) 
    at org.junit.runners.BlockJUnit4ClassRunner.<init>(BlockJUnit4ClassRunner.java:58) 
    at org.junit.internal.builders.JUnit4Builder.runnerForClass(JUnit4Builder.java:13) 
    at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57) 
    at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:29) 
    at org.junit.runner.Computer.getRunner(Computer.java:38) 
    at org.junit.runner.Computer$1.runnerForClass(Computer.java:29) 
    at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57) 
    at org.junit.runners.model.RunnerBuilder.runners(RunnerBuilder.java:93) 
    at org.junit.runners.model.RunnerBuilder.runners(RunnerBuilder.java:84) 
    at org.junit.runners.Suite.<init>(Suite.java:79) 
    at org.junit.runner.Computer.getSuite(Computer.java:26) 
    at org.junit.runner.Request.classes(Request.java:69) 
    at org.junit.runner.JUnitCore.run(JUnitCore.java:117) 
    at org.junit.runner.JUnitCore.runMain(JUnitCore.java:98) 
    at org.junit.runner.JUnitCore.runMainAndExit(JUnitCore.java:53) 
    at org.junit.runner.JUnitCore.main(JUnitCore.java:45) 

FAILURES!!! 
Tests run: 1, Failures: 1 

왜?

Answer 1

관련없는 주석이 있습니다. 방법 자체는 분해를 수행하기 위해 정적이어야

@AfterClass 
public static void tearDownClass() throws Exception { 
    // Code executed after the last test method 
} 

것을 그 자체는하지는 @Test 같아야 것이되어야한다.