Dhanji R. Prasanna 21f8d5a1aa Add integration tests for CacheStats and Gemini serialization ...

Agent: hopper

Added two new integration test files:

1. cache_stats_integration_test.rs (g3-core)
   - Tests CacheStats accumulation through streaming completion flow
   - Verifies cache hit detection (cache_read_tokens > 0)
   - Tests multi-request accumulation of cache statistics
   - Verifies cache efficiency and hit rate calculations
   - Uses MockProvider to simulate provider usage data

2. gemini_serialization_test.rs (g3-providers)
   - Tests Gemini API message format conversion
   - Verifies system messages become system_instruction
   - Verifies assistant role maps to "model" (Gemini terminology)
   - Tests tool conversion to function_declarations format
   - Characterizes multi-system-message behavior (last wins)

Both test files follow blackbox/integration testing principles:
- Test observable behavior through stable surfaces
- Do not assert internal implementation details
- Include documentation of what is/is not asserted

2026-01-29 11:28:52 +11:00

8.9 KiB

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