Node.js test runner integration for LogTape

@logtape/testing-node provides a Node.js test runner integration for LogTape's failure log reporter. Import its test function instead of node:test when you want logs emitted by a test callback to be reported only when that callback fails.

Installation

npm  add     @logtape/testing-node  # for npm
pnpm add     @logtape/testing-node  # for pnpm
yarn add     @logtape/testing-node  # for Yarn
bun  add     @logtape/testing-node  # for Bun

Usage

import { test } from "@logtape/testing-node/autoload";
import { getLogger } from "@logtape/logtape";

test("case", async () => {
  getLogger(["my-lib"]).info("Fixture state: {state}.", {
    state: "ready",
  });

  // The info log is printed only if this callback fails.
});

The autoload entry point is the easiest setup for large suites. It configures the minimal LogTape contextLocalStorage needed by the failure log reporter when LogTape has not been configured yet. If your suite already configures LogTape, that configuration must include contextLocalStorage; otherwise, use @logtape/testing-node and manage setup explicitly.

Set LOGTAPE_TEST_MODE to on-failure, always, or never, and LOGTAPE_TEST_LOWEST_LEVEL to a LogTape level such as debug or info to configure the default reporter used by the autoload test and it exports.

Use createTest() when a suite needs custom reporter options:

import { createTest } from "@logtape/testing-node";

const test = createTest({
  lowestLevel: "debug",
  mode: "on-failure",
});

The package preserves Node.js test options and shorthand helpers such as test.only(), test.skip(), and test.todo(). It also exports a wrapped it() alias and createIt(). Other node:test helpers, including describe(), before(), after(), beforeEach(), and afterEach(), are re-exported unchanged.

Docs

The docs of this package is available at https://logtape.org/manual/testing#node-js-test-runner-integration. For the API references, see https://jsr.io/@logtape/testing-node/doc.