JUnit's TestFactory not supported with Kotlin lambdas

[atetzner]

With issue #234 the support for JUnit's @TestFactory annotation in conjunction with a Kotlin lambda has been implemented. Unfortunately, this seems to be broken as exactly the test that is mentioned in this issue does not work any more: It fails with

java.lang.RuntimeException: Could not find Junit/TestNg TestCase you are running, supported frameworks: Junit3, Junit4, Junit5, TestNg
	at org.approvaltests.namer.AttributeStackSelector.selectElement(AttributeStackSelector.java:69)
	at com.spun.util.tests.TestUtils.getCurrentFileForMethod(TestUtils.java:181)
	at com.spun.util.tests.TestUtils.getCurrentFileForMethod(TestUtils.java:174)
	at org.approvaltests.namer.StackTraceNamer.<init>(StackTraceNamer.java:17)
	at org.approvaltests.Approvals$1.load(Approvals.java:46)
	at org.approvaltests.Approvals$1.load(Approvals.java:43)
	at org.approvaltests.Approvals.createApprovalNamer(Approvals.java:278)
	at com.spun.util.ArrayUtils.getOrElse(ArrayUtils.java:309)
	at org.approvaltests.core.Options$FileOptions.getNamer(Options.java:120)
	at org.approvaltests.Approvals.verify(Approvals.java:196)
	at org.approvaltests.Approvals.verify(Approvals.java:55)
	at org.approvaltests.Approvals.verify(Approvals.java:64)
	at org.approvaltests.Approvals.verify(Approvals.java:59)
	at org.example.ApprovalTest.test_factory$lambda$1$lambda$0(AppTest.kt:19)

It would be great to have this supported (fixed?) as this would reduce the amount of tests that only differ in slight details.

If it helps, I can provide a sample project with a test.

Don't know if it is relevant, but issue #171 that should add general support for @TestFactory annotation (?) is still open. The mentioned workaround in the last comment to add @Testable annotation does at least here not work.

[ScottBob]

Wow! This was a hard one to figure out! It turns out this actually works, but there are two things you need to do. We wrote some documentation here.