https://github.com/spring-projects/spring-security-oauth/tree/master/tests

@WithMockUser
    username, roles, authorities
@WithSecurityContext
org.springframework.security.test.context.support.WithSecurityContextTestExecutionListener;
@TestExecutionListeners({WithSecurityContextTestExecutionListener.class, ...})

2023
https://www.baeldung.com/spring-oauth-testing-access-control
    https://github.com/eugenp/tutorials/tree/master/spring-security-modules/spring-security-oauth2-testing
2021
SpringDeveloper - Test-Driven Security 0:00 of 22:25
    https://www.youtube.com/watch?v=TytSz7u1xQ8
2019
https://medium.com/@mark.hoogenboom/testing-a-spring-boot-application-secured-by-oauth-e40d1e9a6f60