chore: add more tests to survey manager

[mattinannt]

This pull request introduces changes to the SurveyManager class and its test coverage in the FormbricksSDK. The key updates include modifying access levels for methods, refactoring helper methods, and adding comprehensive test cases to improve code reliability and maintainability.

Changes to SurveyManager:

• Updated method access levels from private to internal for refreshEnvironmentAfter, shouldDisplayBasedOnPercentage, and getLanguageCode to allow broader access within the module. [1] [2] [3]
• Refactored helper methods by moving them from private extension SurveyManager to extension SurveyManager, making them accessible as part of the main class extension.

Test Coverage Enhancements:

• Added a new test case, testSurveyManagerEdgeCases, in FormbricksSDKTests to cover edge scenarios for SurveyManager. This includes testing:
  • shouldDisplayBasedOnPercentage for various input values.
  • Handling of corrupt UserDefaults data.
  • Timer-based refresh functionality.
  • Comprehensive coverage of getLanguageCode with different language configurations.

[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