Cannot get executing test method in `ParameterResolver` of `@MethodSource` factory method

[pxzxj]

Deliverables

• Get test method in ParameterResolver of parameterizedTest factory method. for example below extensionContext.getTestMethod() should return method testWithFactoryMethodWithArguments

public class MyTest {

	@RegisterExtension
	static final IntegerResolver integerResolver = new IntegerResolver();

	@ParameterizedTest
	@MethodSource("factoryMethodWithArguments")
	void testWithFactoryMethodWithArguments(String argument) {
		assertTrue(argument.startsWith("2"));
	}

	static Stream<Arguments> factoryMethodWithArguments(int quantity) {
		return Stream.of(
				arguments(quantity + " apples"),
				arguments(quantity + " lemons")
		);
	}

	static class IntegerResolver implements ParameterResolver {

		@Override
		public boolean supportsParameter(ParameterContext parameterContext,
										 ExtensionContext extensionContext) {
			return parameterContext.getParameter().getType() == int.class;
		}

		@Override
		public Object resolveParameter(ParameterContext parameterContext,
									   ExtensionContext extensionContext) {
			Optional<Method> testMethod = extensionContext.getTestMethod();
			boolean present = testMethod.isPresent();  //false
			return 2;
		}

	}
}

Related issues

• Optionally provide test-scoped ExtensionContext for test-specific callbacks in extensions #3445

[marcphilipp]

Accessing the method from the ParameterContext as mentioned below should work.

https://github.com/junit-team/junit5/blob/49e74f755d8a1c9c6a341b7220ab6f72a5c4cfa9/junit-jupiter-api/src/main/java/org/junit/jupiter/api/extension/ParameterResolver.java#L77-L79

[pxzxj]

@marcphilipp actually parameterContext.getDeclaringExecutable() return the factory method, not test method

[marcphilipp]

@pxzxj Thanks for the feedback! You're correct. This use case is not currently supported.

Team decision: Investigate whether it's feasible to support this use case.