test(flag): Add support for targeting.feature to flagd e2e tests

[kylejuliandev]

This PR

Adds support for the targeting.feature in the InProcess and Rpc resolver E2E tests. This ensures the provider can handle EvaluationContext and targeting keys when resolving feature flags.

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[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 significantly enhances the end-to-end testing capabilities for the flagd provider by integrating tests for the targeting.feature specification. The changes ensure that the provider can accurately process and utilize EvaluationContext data, including nested properties and explicit targeting keys, during feature flag resolution. This improves the robustness and reliability of the flag evaluation process, particularly for complex targeting scenarios.

Highlights

• Enhanced E2E Test Coverage: Adds comprehensive end-to-end test support for the targeting.feature specification, ensuring the flagd provider correctly handles EvaluationContext and targeting keys.
• Context Handling Improvements: The ContextSteps.cs file has been updated to support setting integer values in the evaluation context, handling nested context properties, and explicitly setting a targeting key.
• Evaluation Context Initialization: Refactored flag evaluation logic in FlagSteps.cs to ensure the EvaluationContext is properly initialized and built from an EvaluationContextBuilder before being used in flag resolution calls.
• State Management Update: The State.cs utility class now stores the EvaluationContext as an EvaluationContextBuilder instead of a final EvaluationContext object, allowing for incremental context building.
• Project File Updates: The .csproj files for both InProcess and Rpc E2E tests have been modified to include the new targeting.feature file, integrating it into the test suite.

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[gemini-code-assist]

Code Review

This pull request adds support for targeting.feature to the E2E tests, which involves changes to how the EvaluationContext is constructed and used across test steps. The changes are logical and well-implemented. My review includes suggestions to refactor some duplicated code in ContextSteps.cs by using the null-coalescing assignment operator, which will improve conciseness and maintainability. Overall, this is a good addition to the test suite.