Eclipse run single test

[takacsot]

In Eclipse it is possible to select a single test method and execute only that one. But this functionality is not working with HierarchicalContextRunner. Always have initialzationError:

java.lang.Exception: The inner class ep.pericles.mrs.meeting.SaveCommentTest$Inserting$Update is not static.
at org.junit.runners.BlockJUnit4ClassRunner.validateNoNonStaticInnerClass(BlockJUnit4ClassRunner.java:113)
at org.junit.runners.BlockJUnit4ClassRunner.collectInitializationErrors(BlockJUnit4ClassRunner.java:102)
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.junit.internal.requests.FilterRequest.getRunner(FilterRequest.java:31)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.<init>(JUnit4TestReference.java:33)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestMethodReference.<init>(JUnit4TestMethodReference.java:25)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:54)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:452)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

It is clear that in Eclipse not the runner is used for execution test.But Is there any trick to resolve it?

Running a single test is useful when debugging code. Most of the time one test class has many test method which is working on the same production method. But when I am interested in a single scenario the noise of other executions (e.g.they are hitting the same breakpoint.....) are frustrating.

[bechte]

Unfortunately, there is no way to solve this issue with JUnit version 4.11. I proposed a new feature to the JUnit core in version 4.12, which is almost ready to release (see release notes or pull request junit-team/junit4#817). With this feature in place, the runner will also be supported to execute single tests out-of-the-box.

I will also release a version 4.12.0 for the context-runner to align the version numbers. But this release will have no changes in it. Therefore, please try to use the JUnit 4.12 beta with the 4.11.x release of the runner if you like.

All the best.

[takacsot]

Using JUnit 4.12-SNAPSHOT I just got a different error message:

java.lang.NoClassDefFoundError: org/junit/internal/runners/rules/RuleFieldValidator
at de.bechte.junit.runners.validation.RuleValidator.<clinit>(RuleValidator.java:14)
at de.bechte.junit.runners.context.HierarchicalContextRunner.getValidator(HierarchicalContextRunner.java:79)
at de.bechte.junit.runners.context.HierarchicalContextRunner.validate(HierarchicalContextRunner.java:64)
at de.bechte.junit.runners.context.HierarchicalContextRunner.<init>(HierarchicalContextRunner.java:58)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:104)
at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:86)
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:33)
at org.junit.internal.requests.FilterRequest.getRunner(FilterRequest.java:36)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.<init>(JUnit4TestReference.java:33)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestMethodReference.<init>(JUnit4TestMethodReference.java:25)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:54)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:452)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.ClassNotFoundException: org.junit.internal.runners.rules.RuleFieldValidator
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
... 23 more

[bechte]

Okay. This is a broken dependency. The 4.12 release of JUnit will be available soon and I will release a new version of the runner as well. Then we can try again.

In the meantime, I will provide a beta for you to test this thing again. Probably in the beginning of the next week. Is that okay with you?

[bechte]

I just released a 4.12.0-beta-1 version of the hierarchical context runner, that reflects the internal code changes of JUnit and works smoothly together.

You can get it right away from https://oss.sonatype.org/#nexus-search;quick~de.bechte directly or wait until it was published and synced to maven central.

Could you please verify the issue with this version and report your findings?

Thanks in advance.

[bechte]

I tested the feature with the new version and could no longer reproduce the issue. Please verify and close this issue.

[takacsot]

Now it is able to run subset of tests (all test method into an internal class) but not running a single test method only

Example:

public class Outer{
....
   public class Example{
      @Test pubic void t1(){}
      @Test pubic void t2(){}
      @Test pubic void t3(){}
   }
...
}

When selecting t1 to run I found all t1, t2, and t3 running.

[bechte]

You are right about that. Unfortunately, the tools do not yet support the execution of a single method within a inner class. Probably because JUnit never allowed inner classes to contain valid tests. I'm sorry that I cannot help you out with this.