Change return type to `Stream<? extends TestTemplateInvocationContext>`

[sormuras]

junit5/junit-jupiter-api/src/main/java/org/junit/jupiter/api/extension/TestTemplateInvocationContextProvider.java

Line 87 in f5b78f6

Stream<TestTemplateInvocationContext> provideTestTemplateInvocationContexts(ExtensionContext context);

Michael wrote:

I mean I tried to do Stream.generate(() -> new MyInvocationContext()).limit(/*number*/)
This does not work.
but Stream.generate(() -> new MyInvocationContext()).limit(/*number*/).map(e -> e) works...

[sormuras]

Question is, can we change the return type without breaking existing code?

[marcphilipp]

According to https://wiki.eclipse.org/Evolving_Java-based_APIs_2#Evolving_API_interfaces_-_API_methods that would break binary compatibility. We should have declared the method like that initially, though.