# Testing signals — n8n-io/n8n

> Canonical page: https://codevetter.com/unpack/n8n/testing-signals

# Testing signals — n8n-io/n8n

Scanned commit 1a370b965c1fe438dfa58f371a01080eb9cca776 (2026-09-22). Generated by codevetter codevetter 1.12.0 on 2026-09-22.

Unit/integration tests are Vitest, orchestrated by a workspace glob over every package's vitest.config; packages/cli alone has ~286 integration test files plus unit/migration suites runnable against SQLite or Postgres (incl. testcontainers). nodes-base tests live per-node and via JSON workflow harnesses. Playwright covers e2e UI, API, container, performance and benchmark projects under packages/testing/playwright. CI (ci-master.yml) builds, unit-tests on Node 24/26, lints, runs CodSpeed benchmarks, and verifies single-instance npm packaging; Stryker mutation testing is wired via the 'mutate' script.
- Vitest workspace at repo root collects every packages/**/vitest.config.*; ~6368 *.test.ts files exist across the repo. — [vitest.workspace.ts](https://github.com/n8n-io/n8n/blob/1a370b965c1fe438dfa58f371a01080eb9cca776/vitest.workspace.ts)
- packages/cli test scripts run vitest with DB_TYPE=sqlite by default; separate configs (vitest.config.integration.ts, vitest.config.migration.ts, *.testcontainers.ts) target integration and migration suites; test:postgres variants set DB_TYPE=postgresdb. — [packages/cli/package.json#L27-47](https://github.com/n8n-io/n8n/blob/1a370b965c1fe438dfa58f371a01080eb9cca776/packages/cli/package.json#L27-L47) [packages/cli/test/integration](https://github.com/n8n-io/n8n/blob/1a370b965c1fe438dfa58f371a01080eb9cca776/packages/cli/test/integration)
- Test layout in packages/cli/test: unit/, integration/, migration/, shared/, plus global-setup.ts and setup-testcontainers.ts helpers. — [packages/cli/test/global-setup.ts](https://github.com/n8n-io/n8n/blob/1a370b965c1fe438dfa58f371a01080eb9cca776/packages/cli/test/global-setup.ts) [packages/cli/test/setup-testcontainers.ts](https://github.com/n8n-io/n8n/blob/1a370b965c1fe438dfa58f371a01080eb9cca776/packages/cli/test/setup-testcontainers.ts)
- nodes-base keeps per-node tests in <Node>/test/ or __tests__ dirs plus a top-level test/ folder with JSON workflow harness tests (NodeTestHarness) and nock-based HTTP mocking. — [packages/nodes-base/test](https://github.com/n8n-io/n8n/blob/1a370b965c1fe438dfa58f371a01080eb9cca776/packages/nodes-base/test) [packages/nodes-base/nodes/Webhook/test/description.test.ts](https://github.com/n8n-io/n8n/blob/1a370b965c1fe438dfa58f371a01080eb9cca776/packages/nodes-base/nodes/Webhook/test/description.test.ts) [packages/nodes-base/AGENTS.md](https://github.com/n8n-io/n8n/blob/1a370b965c1fe438dfa58f371a01080eb9cca776/packages/nodes-base/AGENTS.md)
- Playwright suite lives in packages/testing/playwright with playwright.config.ts + playwright-projects.ts; tests/e2e, tests/framework, infrastructure/benchmark and performance projects; currents.config.ts indicates Currents reporting. — [packages/testing/playwright/playwright.config.ts](https://github.com/n8n-io/n8n/blob/1a370b965c1fe438dfa58f371a01080eb9cca776/packages/testing/playwright/playwright.config.ts) [packages/testing/playwright/tests/e2e](https://github.com/n8n-io/n8n/blob/1a370b965c1fe438dfa58f371a01080eb9cca776/packages/testing/playwright/tests/e2e) [packages/testing/playwright/currents.config.ts](https://github.com/n8n-io/n8n/blob/1a370b965c1fe438dfa58f371a01080eb9cca776/packages/testing/playwright/currents.config.ts)
- CI on master (ci-master.yml): build-github job, unit-test reusable workflow on Node 24.18.1 and 26.5.1 with coverage on 24, lint reusable workflow, CodSpeed performance benchmarks post-merge, and verify-single-instance-npm packaging check. — [.github/workflows/ci-master.yml](https://github.com/n8n-io/n8n/blob/1a370b965c1fe438dfa58f371a01080eb9cca776/.github/workflows/ci-master.yml)
- Mutation testing is available via Stryker: @stryker-mutator/core + vitest-runner in devDeps and 'pnpm mutate'/'mutate:diff' scripts. — [package.json#L71-72](https://github.com/n8n-io/n8n/blob/1a370b965c1fe438dfa58f371a01080eb9cca776/package.json#L71-L72) [package.json#L101-102](https://github.com/n8n-io/n8n/blob/1a370b965c1fe438dfa58f371a01080eb9cca776/package.json#L101-L102)
- Core engine has dedicated unit tests: workflow-execute.test.ts, routing-node.test.ts, active-workflow-triggers.test.ts under packages/core/src/execution-engine/__tests__. — [packages/core/src/execution-engine/__tests__/workflow-execute.test.ts](https://github.com/n8n-io/n8n/blob/1a370b965c1fe438dfa58f371a01080eb9cca776/packages/core/src/execution-engine/__tests__/workflow-execute.test.ts)
- Encryption upgrades/rotations have dedicated Playwright suites exposed via root scripts test:encryption:upgrade and test:encryption:rotation. — [package.json#L82-83](https://github.com/n8n-io/n8n/blob/1a370b965c1fe438dfa58f371a01080eb9cca776/package.json#L82-L83)
- Coverage is collected through @vitest/coverage-v8 and codecov.yml; Codecov token is threaded through ci-master build env. — [packages/cli/package.json#L125](https://github.com/n8n-io/n8n/blob/1a370b965c1fe438dfa58f371a01080eb9cca776/packages/cli/package.json#L125) [codecov.yml](https://github.com/n8n-io/n8n/blob/1a370b965c1fe438dfa58f371a01080eb9cca776/codecov.yml) [.github/workflows/ci-master.yml](https://github.com/n8n-io/n8n/blob/1a370b965c1fe438dfa58f371a01080eb9cca776/.github/workflows/ci-master.yml)

Every claim links to its cited files at the pinned commit. Citations identify source evidence; they do not establish runtime correctness. Independent CodeVetter scan — not reviewed by upstream maintainers.

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