Can't run individual test methods from IntelliJ

[jacobtabak]

For tests with method variations it seems like you can't run an individual test from IntelliJ, only all the tests in a class.

java.lang.Exception: No tests found matching Method multiple(com.squareup.burst.MethodTest) from org.junit.internal.requests.ClassRequest@2e26c3a1
at org.junit.internal.requests.FilterRequest.getRunner(FilterRequest.java:35)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:41)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:211)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:67)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)

Haven't really thought about if there's a fix or if it even matters.

[dlubarov]

Interesting. It seems when you run a single method, a Filter is applied which matches Descriptions with a unique ID of single(MethodTest). I tried changing describeChild to have it generate these "bare" unique IDs (there's a separate display name which can still show the parameters). It sort of worked, but resulted in this funny hierarchy:

I'm now sure where this hierarchy is generated, but it seems having multiple tests share the same unique ID breaks an assumption somewhere.

[dlubarov]

I looked into Parameterized a bit, since running individual Parameterized tests somehow works.

Unfortunately it looks like IntelliJ made this work using a special SelectedParameterizedRunner which has direct access to the class and method name. They skip the normal test filtering code and do it in the runner's getChildren().

Haven't quite given up though. We can override ParentRunner's filter method so maybe we can add some special logic there instead of calling filter.shouldRun.

[hustonerd]

I'm unable to run an individual test case from the latest Android Studio when I have @RunWith(BurstJUnit4::class) on the test class. (Burst v1.2.0). When I try to run an individual test case, it runs all test cases in the class instead.

When I comment out that annotation (and whichever test(s) need Burst), then I can run individual test methods again.

This was definitely observed on Android Studio 4.0.2 and 4.1. I thought I'd seen this behavior prior to Android Studio 4.0 as well, but I hadn't considered the connection to Burst so I didn't test that at the time.

This is mainly significant when I'm trying to debug test runs after refactoring a class.