Thanks @Vikash !

For testing i believe the spring-security-test package should help. Found some resources that could help you -

1. Maven library - https://mvnrepository.com/artifact/org.springframework.security/spring-security-test/5.7.1

2. Test examples - https://docs.spring.io/spring-security/site/docs/5.2.x/reference/html/test.html

You'll have to explore the library further to test the response header scenario specifically.

Regards,

Boudhayan Dev