feat: Add optional CancellationToken parameter to SetProviderAsync

[kylejuliandev]

This PR

Add an optional CancellationToken parameter to the SetProviderAsync(FeatureProvider) and SetProviderAsync(string, FeatureProvider) methods so cancellations can be delivered to the Provider initialization method.

Related Issues

Fixes #637

Notes

Follow-up Tasks

How to test

[gemini-code-assist]

Summary of Changes

Hello @kylejuliandev, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the OpenFeature API by introducing an optional CancellationToken parameter to the SetProviderAsync methods. This allows callers to propagate cancellation requests to the underlying feature provider's initialization process, providing better control over asynchronous operations and improving responsiveness in scenarios where provider setup might be long-running or needs to be aborted.

Highlights

• CancellationToken Support: Added an optional CancellationToken parameter to both SetProviderAsync overloads, allowing for the cancellation of provider initialization processes.
• API Modification: The SetProviderAsync(FeatureProvider) and SetProviderAsync(string, FeatureProvider) methods in src/OpenFeature/Api.cs now accept an optional CancellationToken.
• Test Coverage: A new test case, OpenFeature_Should_Initialize_Provider_WithCancellationToken, has been added to test/OpenFeature.Tests/OpenFeatureTests.cs to validate the correct propagation and usage of the CancellationToken during provider initialization.

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[gemini-code-assist]

Code Review

This pull request introduces an optional CancellationToken to the SetProviderAsync methods, enabling cancellation of provider initializations. The changes are well-implemented, propagating the token through the repository to the provider. My review includes a suggestion to restore a helpful XML documentation comment that appears to have been removed accidentally, and a recommendation to add a test case to verify the cancellation behavior, which will enhance the robustness of the test suite.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.25%. Comparing base (10a43c9) to head (071fe22).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #638   +/-   ##
=======================================
  Coverage   90.25%   90.25%           
=======================================
  Files          79       79           
  Lines        3284     3284           
  Branches      384      384           
=======================================
  Hits         2964     2964           
  Misses        251      251           
  Partials       69       69           

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