Add DoesNotMatch assertion method for string regex validation

[AnnaSasDev]

Please check the following before creating a Pull Request

• If this is a new feature or piece of functionality, have you started a discussion and gotten agreement on it?

  I havent started a discussion about it, but I think I follow the naming convention with DoesNot... like DoesNotEndWith()

• Did you write tests to ensure you code works properly?

  I didnt write a test for this, as I didnt find a link to an existing test for the original Matches assertion, but the method is a simple inversion of the original Matches assertion method.
  I would be more than happy to write some tests for it, but I dont know exactly where I would need to put them.

[thomhurst]

Thanks! Can you add some tests for positive and negative paths?

[AnnaSasDev]

Thanks! Can you add some tests for positive and negative paths?

yes absolutely! I was just unsure where to exactly place them, as to my knowledge the original .Matches() method didnt have any tests either. Do I place these in the TUnit.Assertions.UnitTests? I'll make both tests for .Matches() and .DoesNotMatch() then.

[AnnaSasDev]

Tests are running successfully locally, but had to do some #if NET logic to ensure net framework compatibility.
I tried to follow the standerds from the other tests I could find in the same project.
If I did anything wrong, please do tell me, so I can do better in the future

[AnnaSasDev]

Ah, I see Codacy has an issue on partial class, probably on the net framework flow as far as I can imagine, as the partial keyword isnt needed then.
Do I add an extra #if to resolve this, which seems a bit overly verbose for me?

[thomhurst]

Don't worry about codacy - I can sort it later.

You need to run the public API tests, which will fail, and then accept the new snapshots (instructions are here if you've not used verify: https://github.com/VerifyTests/Verify?tab=readme-ov-file#initial-verification) and then commit them

[AnnaSasDev]

Sorry, I had missed the net framework verify

[thomhurst]

Thanks!