@DisplayNameGeneration is not discovered on runtime enclosing type for @Nested test class

[sbrannen]

Overview

@DisplayNameGeneration is currently discovered on the current test, a superclass, or the enclosing class in which a Nested test class is declared. However, the runtime type of an enclosing instance is not always the class in which a @Nested test class is declared.

Example

The examples here are copies of those in #4130 except that @IndicativeSentencesGeneration has been moved from AbstractBaseTests to ScenarioOneTests.

abstract class AbstractBaseTests {

	@Nested
	class NestedTests {

		@Test
		void test() {
		}
	}
}

@IndicativeSentencesGeneration
class ScenarioOneTests extends AbstractBaseTests {
}

Actual Behavior

When running ScenarioOneTests, we currently see the following display names, since @IndicativeSentencesGeneration is not honored (i.e., the @DisplayNameGeneration(IndicativeSentences.class) meta-annotation is not discovered).

• ScenarioOneTests
  • NestedTests
    • test()

Expected Behavior

When running ScenarioOneTests, we would expect the following display names before #4130 is resolved.

• ScenarioOneTests
  • AbstractBaseTests, NestedTests
    • AbstractBaseTests, NestedTests, test()

When running ScenarioOneTests, we would expect the following display names after #4130 is resolved.

• ScenarioOneTests
  • ScenarioOneTests, NestedTests
    • ScenarioOneTests, NestedTests, test()

Related Issues

• DisplayNameGenerator cannot access runtime enclosing type for @Nested test class #4130

Deliverables

• Determine if it is possible to support this use case
• If it is possible, ensure that @DisplayNameGeneration is discovered on the runtime enclosing type for a @Nested test class.

[marcphilipp]

Team decision: Investigate feasibility after #4130 has been addressed.