test: Adding tests for LDContextBuilder

[ActuallyConnor]

Requirements

• I have added test coverage for new or changed functionality
• I have followed the repository's pull request submission guidelines
• I have validated my changes against all supported platform versions

Related issues

N/A

Describe the solution you've provided

Improve test coverage and test directly LDContextBuilder.php

Describe alternatives you've considered
This class was tested indirectly previously but contained logic that would benefit from testing directly.

Additional context

N/A

[keelerm84]

Thank you for your interest and in taking the time to contribute!

This class was tested indirectly previously but contained logic that would benefit from testing directly.

I'm not sure which tests you are referring to. If you look at LDContextTest.php, most of the tests interact with the context builder (via LDContext::builder). As a result, I think several of the tests in this PR are redundant with what we currently have.

However, there are a couple of tests which I think we did miss. If you want to move those tests into that file, I would be happy to include those contributions. I've tried to note which ones to keep and which to save.

LMK if you have any questions!

[ActuallyConnor]

@keelerm84 I've applied the requested changes to this PR

[keelerm84]

Thank you for addressing this feedback, and once again, thank you for taking the time to contribute to this project!