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Replace `#if canImport(FoundationModels, _version: 2.1)` with `#if compiler(>=6.4.2)` around the `Transcript.Entry.data` case in `GeminiTranscriptTranslator` and its test. Xcode 27.2 beta 3 bumped the Swift compiler to 6.4.2, so the condition no longer depends on the underscored `_version` parameter of `canImport`. Earlier Xcode 27.2 betas report Swift 6.4 and skip the case, which is acceptable since beta 3 supersedes them.
GeminiLanguageModel Tests
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 IntegrationTests
# 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
MockHTTPURLProtocolfor deterministic, zero-network, sub-second execution. - Run cleanly in offline, CI, and local development environments without any credentials or background daemons.
- Use
-
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.
- Tagged with
Tip
For details on configuring credentials and parameterizing integration tests, see the Integration Tests Guide.