Status Quo

It is currently possible to declare @DisplayName("") (or containing only white space), but this should not be permitted.

If a user explicitly declares @DisplayName, the user must provide a non-empty name.

The same applies to display name patterns supplied via @RepeatedTest and @ParameterizedTest.

Related Issues

• Introduce error handling mechanism for validation and discovery errors #242

Deliverables

• Introduce appropriate JavaDoc for DisplayName.value.
• ❌ Introduce precondition check to ensure that a user has supplied a non-empty name via @DisplayName.
  • See TODO in TestInfoParameterResolverTests.customDisplayNameThatIsEmpty()
  • Instead of using precondition checks, we can currently only log a warning. See commit f03cc6d for details.
• Ensure that the precondition check is applied to @Test, @TestFactory, and @TestTemplate methods (for repeated and parameterized tests as well).
• Ensure that all extensions or internal mechanisms that generate or return a display name return non-empty values.