Add unit tests

[BertVM52]

Hi,

I've taken the time to add some unit tests. Since I use this package for B2C authentication, most tests that were written test this functionality. I believe it's a good starting point for people to add more tests.

The tests use a MockHandler that returns fake openIdConfig, keys, and tokens. This lets us test the package's code without having to worry about external connections. (See Fakers/ and Helper/)

Overview:

• AccessTokenTest: correctly create and serialize AccessToken
• AzureResourceOwnerTest: correctly create resource owner
• AzureTest:

  • test openIdConfig handling

  • throw RuntimeException when client id is invalid

  • throw RuntimeException when token is expired

  • throw RuntimeException when token is from future

  • throw RuntimeException when issuer is invalid

  • test getBaseAuthorizationUrl

  • test getLogoutUrl

  • test validateAccessToken: ISSUE -> validateAccessToken causes UnexpectedValueException : "kid" invalid, unable to lookup correct key in JWT.php:448. Not sure if this is a bug. This function doesn't seem to be used anywhere else. The same error is thrown when I call validateAccessToken in my personal project.

  • throw exception for invalid keys: ISSUE -> code only catches JWT_Exception but this class does not exist and also does not catch other exceptions

  • throw exception for invalid token

  • test getGrant

[hajekj]

Awesome! Thanks so much for this!

[BertVM52]

Thanks for the merge! Any idea when the next package release might be?
(would mostly be for #184, for which i'm using a patch now)