Document supported @Transactional attributes in the TestContext framework

[sbrannen]

Overview

The Spring TestContext framework has traditionally not supported attributes in @Transactional for test-managed transactions. Exceptions to the rule include support for a PlatformTransactionManager qualifier and the NOT_SUPPORTED propagation behavior.

Although it is possible to declare other @Transactional attributes for test-managed transactions, these are silently ignored, which can lead to potential confusion.

Related Issues

• Support rollbackFor attribute of @Transactional in the TestContext framework #23138

Deliverables

• Document supported @Transactional attributes in the TestContext framework.