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Rosetta E2E Tests

This folder contains E2E tests for each provider supported by the rosetta-ai package. These tests use real provider libraries to ensure translations work correctly in practice.

Setup

cd examples
pnpm install

Running Tests

# Run all E2E tests
pnpm test

No rebuild needed! The tests import directly from the source code (../src), so you can edit the library and immediately run tests without rebuilding.

Test Files

GenAI (genai.test.ts)

Tests the core GenAI format with hardcoded messages. Since GenAI is the intermediate format, this validates:

  • Identity translation (GenAI → GenAI)
  • Auto-inference of GenAI provider
  • Translation to Promptl
  • Tool calls
  • Reasoning parts
  • String input convenience
  • Round-trip translations

Promptl (promptl.test.ts)

Uses the promptl-ai package to test real library output:

  • Simple conversations compiled from PromptL syntax
  • Auto-inference of Promptl provider
  • Dynamic prompts with variables
  • Legacy toolArguments field (backwards compatibility)
  • New args field
  • Legacy tool message format (toolName/toolId at message level)
  • New tool-result content format
  • Reasoning and redacted-reasoning content
  • toolCalls array in assistant messages
  • Round-trip translations with extended types
  • System message extraction

OpenAI Completions (openai_completions.test.ts)

Note: The OpenAI Completions provider is not yet fully implemented. Contains placeholder tests that will be enabled once the provider is complete.

Auto-Inference Testing

Each test suite includes tests for the auto-inference feature. When you pass messages to translate() without specifying the from option, Rosetta automatically detects the provider format:

// Explicit provider specification
const result = translate(messages, { from: Provider.GenAI });

// Auto-inference (Rosetta detects the provider automatically)
const autoResult = translate(messages);

Configuration

The vitest.config.ts is configured to:

  1. Import rosetta-ai from source (../src/index.ts)
  2. Support the $package alias for internal imports
  3. Run all *.test.ts files

This allows rapid development: edit source → run tests → see results immediately.