DockerComposeRule doesn't work as @Rule

[nickmelis]

DockerComposeRule doesn't work as @Rule

[joelea]

DCR is definitely intended to be usable with the @Rule annotation. I'd also expect there to be some clues in the initialization error.

• Does your stacktrace from the exception have a cause?
• How are you running the tests? Gradle? Maven? IntelliJ? Eclipse?

Thanks
Joe

[nickmelis]

• No cause or anything meaningful whatsoever
• Running tests inside Eclipse

I can take a screenshot if that is of any help

[joelea]

A screenshot would be helpful, thanks!

[nickmelis]

Actually I finally managed to get a meaningful message from Eclipse saying:

org.junit.internal.runners.rules.ValidationError: The @Rule 'docker' must not be static or it must be annotated with @ClassRule.
	at org.junit.internal.runners.rules.RuleMemberValidator$MemberMustBeNonStaticOrAlsoClassRule.validate(RuleMemberValidator.java:183)
	at org.junit.internal.runners.rules.RuleMemberValidator.validateMember(RuleMemberValidator.java:99)
	at org.junit.internal.runners.rules.RuleMemberValidator.validate(RuleMemberValidator.java:93)
	at org.junit.runners.BlockJUnit4ClassRunner.validateFields(BlockJUnit4ClassRunner.java:196)
	at org.junit.runners.BlockJUnit4ClassRunner.collectInitializationErrors(BlockJUnit4ClassRunner.java:129)
	at org.junit.runners.ParentRunner.validate(ParentRunner.java:416)
	at org.junit.runners.ParentRunner.<init>(ParentRunner.java:84)
	at org.junit.runners.BlockJUnit4ClassRunner.<init>(BlockJUnit4ClassRunner.java:65)
	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:33)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createUnfilteredTest(JUnit4TestLoader.java:84)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:70)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:43)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:444)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

which is pretty self explanatory. We should be able to close this down unless anyone has any objections.

[joelea]

Thanks! Hope everything works out for you.