Fixed NPE for unknown request in FilterChainProxy

[ronodhirSoumik]

Fixes #18157

[ngocnhan-tran1996]

We don’t need to check for null because this.method.name() will return a String type and String#equals(null) will return false, so the test passes without any changes.

[ronodhirSoumik]

but this fixes the NPE case - ig that is our expectation of getting false for invalid

[ngocnhan-tran1996]

this.method.name().equals(request.getMethod()) will return false if request.getMethod() == null and won’t throw an NPE unless request is null or method is null. The test passes without any changes.

[ronodhirSoumik]

oh got it - thanks for the explanation

[rwinch]

Thank you for your submission @ronodhirSoumik

As pointed out, the test will pass without changes to the code. Additionally, the issue you are linking to is caused by ConcurrentHashMap not supporting a null key (which is of type ServletContext) and is unrelated to the method being null.

I think that the test would still provide value by ensuring that we do not get a NullPointerException later. If you would modify the PR to just have the test and update the PR subject, I can merge it.