具有本地内部 class 的 JUnit 4 测试方法在测试用例之间不一致

Question

好的，我已尽我所能搜索但找不到任何内容。我是第一次提问所以要温柔。 :p

在一个测试用例中，我有一个测试方法来测试给定的事件侦听器方法，当它被触发时。

public class TestCaseDoingSupport {

    public TestCaseDoingSupport() {
        super();
    }
    @Test
    public void testFireEventDoingSomething() {

       class LocalDoingListener extends DoingAdapter {

                    public LocalDoingListener() {
                        super();
                    }
                    public void onStartedDoingSomething(DoingEvent event) {
                        Assert.assertEquals(DoingClass.STARTED_DOING_SOMETHING, event.getDoingStatus());
                    }
                }

                DoingListener listener = new LocalDoingListener();
                DoingSupport support = new DoingSupport(new DoingClass());
                support.addDoingListener(listener);
                support.fireStartedDoingSomething();
            }
}

我遇到的问题是：这个 exact 模式用于另外两个事件侦听器的另外两个测试用例（在同一个项目中）并且它工作得很好，但是在测试用例中，我遇到了问题（来自测试报告）java.lang.Exception: Test class should have exactly one public constructor.

我真的不明白为什么这种模式在一个测试用例中有效，但在另一个测试用例中却无效——我什至尝试去掉构造函数，但没有任何区别。有人运行解决过这个问题吗？如果有，您是如何解决的？

非常感谢。

编辑： 我尝试使方法局部 class public 的构造函数（反映在发布的代码片段中）但测试报告中的投诉相同。在命令行，gradle 报告：

com.example.testTestCaseDoingSupportLocalDoingListener > initializationError FAILED
    java.lang.Exception

下面发布了完整的堆栈跟踪。

java.lang.Exception: Test class should have exactly one public zero-argument constructor
    at org.junit.runners.BlockJUnit4ClassRunner.validateZeroArgConstructor(BlockJUnit4ClassRunner.java:147)
    at org.junit.runners.BlockJUnit4ClassRunner.validateConstructor(BlockJUnit4ClassRunner.java:124)
    at org.junit.runners.BlockJUnit4ClassRunner.collectInitializationErrors(BlockJUnit4ClassRunner.java:103)
    at org.junit.runners.ParentRunner.validate(ParentRunner.java:355)
    at org.junit.runners.ParentRunner.<init>(ParentRunner.java:76)
    at org.junit.runners.BlockJUnit4ClassRunner.<init>(BlockJUnit4ClassRunner.java:57)
    at org.junit.internal.builders.JUnit4Builder.runnerForClass(JUnit4Builder.java:10)
    at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
    at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)
    at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
    at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:26)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.runTestClass(JUnitTestClassExecuter.java:84)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.execute(JUnitTestClassExecuter.java:56)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassProcessor.processTestClass(JUnitTestClassProcessor.java:66)
    at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
    at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
    at org.gradle.messaging.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:32)
    at org.gradle.messaging.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
    at com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
    at org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:109)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
    at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
    at org.gradle.messaging.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:360)
    at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54)
    at org.gradle.internal.concurrent.StoppableExecutorImpl.run(StoppableExecutorImpl.java:40)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)

Answer 1

好的，我找到了。在我的 gradle 脚本中，我有这个

tasks.withType(Test) {
    scanForTestClasses = false
    exclude "**/*$5*.class"
}

避免将内部类视为测试类。将其编辑为 exclude "**/*$*.class" 解决了 all 内部类.

真不敢相信我之前没有看到这个...

具有本地内部 class 的 JUnit 4 测试方法在测试用例之间不一致

JUnit 4 Test Method with local inner class is inconsistent across Test Cases

java

junit

unit-testing

inner-classes

junit4