feat: added strategy input APIs

[petruki]

This pull request introduces a generic Check API for strategy validation and adds a comprehensive set of convenience helpers for all supported strategy types. It also significantly expands and refines the test suite to cover the new API and all strategy types, and updates documentation to reflect these changes.

API Enhancements

• Introduced a generic Check(strategy, input) method on the Switcher type, enabling validation for any strategy type with a single entry-point.
• Added convenience helper methods: CheckValue, CheckNumeric, CheckDate, CheckTime, CheckPayload, CheckNetwork, and CheckRegex, all delegating to the generic Check method for a consistent and extensible API.
• Updated code examples in README.md to demonstrate chaining of multiple strategy checks and the new generic check API. [1] [2] [3]

Test Suite Expansion and Refactoring

• Refactored local evaluation tests in local_test.go into themed groups (e.g., value, numeric, date, time, payload, regex strategies), and added comprehensive test coverage for all strategy types and their operations using both the generic and helper APIs. [1] [2]
• Added remote evaluation tests to ensure that generic strategy inputs are correctly sent to the remote criteria endpoint.
• Added execution logger tests to verify that generic strategy checks are logged and can be retrieved by switcher.

Test Data

• Added new test snapshot files for date-based strategies (e.g., default_date_only.json) to support the new test cases.

These changes make the SDK more flexible, easier to use, and better tested across all supported feature flag strategies.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud