Java JUnit 崩溃说方法应该是静态的，然后崩溃说它不应该？
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时间：2020-08-13 08:35:40 来源:igfitidea点击:
JUnit crashes saying method should be static, then crashes saying it shouldn't?
提问by Dog
I'm trying to make a simple example test in JUnit that tests two things, then does teardown.
我正在尝试在 JUnit 中进行一个简单的示例测试，它测试两件事，然后进行拆卸。
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
}
}
When I try to run this, it crashes saying tearDownClasshas to be static:
当我尝试运行它时，它崩溃说tearDownClass必须是静态的：
$ 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.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
So I change tearDownClassto static, but now it says it should not be static:
所以我tearDownClass改为静态，但现在它说它不应该是静态的：
$ 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.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
Why?
为什么？
采纳答案by nanofarad
You have extraneous annotations. it should be:
你有多余的注释。它应该是：
@AfterClass
public static void tearDownClass() throws Exception {
// Code executed after the last test method
}
That method itself should be static in order to perform the teardown, and itself should notbe a @Test.
为了执行拆卸，该方法本身应该是静态的，并且它本身不应该是@Test.
