Hybrid Gateway - Unit tests for httpRoute converter implementation

[alacuku]

Problem Statement

The httpRouteConverter in controller/hybridgateway/converter/http_route.go has only one test (TestHostnamesIntersection) covering ~15% of its functionality. Critical methods like Translate(), UpdateRootObjectStatus(), getHybridGatewayParents(), and the main translate() logic are completely untested.

This leaves core HTTPRoute-to-Kong translation business logic vulnerable to regressions and makes debugging difficult when issues arise.

Proposed Solution

Add comprehensive unit tests covering:

• Core methods: Translate(), GetOutputStore(), UpdateRootObjectStatus()
• Translation logic: HTTPRoute rules → Kong resources (Services, Upstreams, Targets, Routes)
• Status management: Parent acceptance, backend reference resolution, condition building
• Error scenarios: Invalid configs, missing resources, ReferenceGrant failures
• Edge cases: Cross-namespace refs, empty rules, hostname mismatches

Additional Information

Current coverage: ~15% (1 test for hostname logic only)
Target coverage: >85% with focus on business-critical translation paths

The converter is a core component that transforms Gateway API resources into Kong configuration - comprehensive testing is essential for reliability.

Acceptance Criteria

• Tests are added for this feature / enhancement
• As a user, I can rely on stable HTTPRoute translation behavior protected by comprehensive tests
• Unit test coverage for httpRouteConverter reaches >85%
• All public methods have dedicated test coverage
• Translation logic tests cover multiple HTTPRoute configurations
• Error handling and edge cases are tested
• Cross-namespace ReferenceGrant scenarios have test coverage

[mlavacca]

Punted to beta