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Andrew Heard 6c78295b70 fix(ai): handle Transcript.Entry.data in GLM (#16890 )

The Xcode 27.2 SDK (FoundationModels 2.1) adds a `Transcript.Entry.data`
case, which triggers a "switch must be exhaustive" warning in
`GeminiTranscriptTranslator`. Handle the new case by throwing
`unsupportedTranscriptContent`, gated with `canImport(FoundationModels,
_version: 2.1)` so only the one case is conditionally compiled and
Xcode 27.0 and 27.1 continue to build.

Add a unit test for the new case. It requires macOS 27.2 or later at
runtime, so it is skipped on earlier OS versions.

Add a `unit-tests` job to the GeminiLanguageModel workflow that runs
`swift test --skip IntegrationTests` on Xcode 27.0 and 27.2, as well as
on Xcode 26.6 (macOS 26) and Xcode 26.2 (macOS 15). The FoundationModels
code is compiled out on Xcode 26, so those jobs verify that the package
still builds and its remaining tests pass with older toolchains.

Update the test READMEs to use `--skip IntegrationTests`, since
`--skip Integration` also skips the `IntegrationTestingBackendTests`
unit tests.

2026-10-13 16:05:41 -04:00

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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 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.

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GeminiLanguageModel Tests

Quick Start

Test Suites

Testing Architecture

2.5 KiB

Raw Permalink Blame History