Unit and integration test suites validating GeminiLanguageModel protocol conformance, streaming response generation, transcript translation, error mapping, and backend integration.

Quick Start

# Run all unit tests (fast, ~0.04s, skips integration tests)
swift test --skip Integration

# Run all tests in this target (including integration tests)
swift test --filter GeminiLanguageModelTests

Test Suites

Suite / File	Scope	Strategy
`GeminiLanguageModelTests.swift`	Protocol conformance, single/multi-turn responses, streaming, tool calling	Unit (`MockHTTPURLProtocol`)
`GenerationSchema+GeminiTests.swift`	JSON Schema encoding and property ordering conversion	Unit (pure transformation)
`GeminiRequestTranslatorTests.swift`	Request, generation config, tool declarations, and tool mode mapping	Unit (pure transformation)
`GeminiTranscriptTranslatorTests.swift`	Apple `Transcript` <-> Gemini payload mapping (tools, reasoning, prompts)	Unit (pure transformation)
`GeminiErrorMapperTests.swift`	HTTP and API error mapping to `LanguageModelError`	Unit (exhaustive mapping)
`IntegrationTestingBackendTests.swift`	Endpoint resolution and credential discovery	Unit / Infrastructure
`IntegrationTests/`	End-to-end Gemini and Firebase AI Logic integration tests	Integration (see `IntegrationTests/README.md`)

Testing Architecture

This target separates tests into two distinct tiers:

Unit Tests (Default):
- Use MockHTTPURLProtocol for deterministic, zero-network, sub-second execution.
- Run cleanly in offline, CI, and local development environments without any credentials or background daemons.
Integration Tests (IntegrationTests/):
- Tagged with .tags(.integration) and gated by .requireIntegrationTestingBackend.
- Exercise endpoints on Google Cloud and Firebase using configured credentials.
- Isolated in the IntegrationTests/ subfolder so unit test runs are never slowed down by network timeouts or external dependencies.

Tip

For details on configuring credentials and parameterizing integration tests, see the Integration Tests Guide.