Running Integration Tests

Integration tests in VS Code are split into two categories:

1. Node.js integration tests - files ending in .integrationTest.ts under src/. These run in Electron via the same Mocha runner as unit tests.
2. Extension host tests - tests embedded in built-in extensions under extensions/ (API tests, Git tests, TypeScript tests, etc.). These launch a full VS Code instance with --extensionDevelopmentPath.

Scripts

• macOS / Linux: ./scripts/test-integration.sh [options]
• Windows: .\scripts\test-integration.bat [options]

When run without filters, both scripts execute all node.js integration tests followed by all extension host tests. The deterministic Agent Host E2E entrypoints are parallelized across isolated test processes during the node.js phase, then excluded from the remaining serial node.js run.

When run with --run or --runGlob (without --suite), only the node.js integration tests are run and the filter is applied. Extension host tests are skipped since these filters are node.js-specific.

When run with --grep alone (no --run, --runGlob, or --suite), all tests are run -- both node.js integration tests and all extension host suites -- with the grep pattern forwarded to every test runner.