Description

Makes Spring integration tests use AbstractsValueProvider (i.e. use instances of sub type where abstract types are expected).

How to test

Manual tests

Generate integration tests for OwnerController.processCreationForm(@Valid Owner owner, BindingResult result) in spring-petclinic project using PetClinicApplication configuration. There should be tests that use non-null values for BindingResult.

Self-check list

• I've set the proper labels for my PR (at least, for category and component).
• PR title and description are clear and intelligible.
• I've added enough comments to my code, particularly in hard-to-understand areas.
• The functionality I've repaired, changed or added is covered with automated tests.
• Manual tests have been provided optionally.
• The documentation for the functionality I've been working on is up-to-date.