KNOX-3097 Add more redirect.whitelist Test Cases for KNOXSSO

[lmccay]

What changes were proposed in this pull request?

Additional unit tests for KNOXSSO and redirect whitelist handling.
These tests are currently in the WebSSOResourceTest class for some reason.
We should move them to a new RegexUtilsTest at some point.

How was this patch tested?

With the new and existing tests.

[lmccay]

Inadvertently included other changes.

[smolnar82]

My two cents:

• the description suggest tests in the KNOXSSOUT service but those tests are added in the test cases for KNOXSSO (WebSSOutResourceTest vs WebSSOResourceTest)
• these tests - within WebSSOResourceTest - are actually testing RegexUtils. I wonder if it was better to have those test cases in a new RegExUtilsTest class 💡

[moresandeep]

My two cents:

• the description suggest tests in the KNOXSSOUT service but those tests are added in the test cases for KNOXSSO (WebSSOutResourceTest vs WebSSOResourceTest)
• these tests - within WebSSOResourceTest - are actually testing RegexUtils. I wonder if it was better to have those test cases in a new RegExUtilsTest class 💡

I think so too, i don't see a test for RegexUtils class, so perhaps create a new one and add these tests to it?

[lmccay]

Ahh, very true on the WEBSSOUT point. I'll see if I can change that.
I just tracked down where the RegexUtils tests were already and added on there.
We can move them all in a follow on patch, I think.