Borp is a typescript-aware test runner for node:test. It also support code coverage via c8.

Borp is self-hosted, i.e. Borp runs its own tests.

npm i borp --save-dev

borp --coverage

# with check coverage active
borp --coverage --check-coverage --lines 95

# with a node_modules located reporter
borp --reporter foo

# with a node_modules located reporter writing to stderr
borp --reporter foo:stderr

# with a local custom reporter
borp --reporter ./lib/some-reporter.mjs

Borp will automatically run all tests files matching *.test.{js|ts}.

.
├── src
│   ├── lib
│   │   └── math.ts
│   └── test
│       └── math.test.ts
└── tsconfig.json

As an example, consider having a src/lib/math.ts file

export function math (x: number, y: number): number {
  return x + y
}

and a src/test/math.test.ts file:

import { test } from 'node:test'
import { math } from '../lib/math.js'
import { strictEqual } from 'node:assert'

test('math', () => {
  strictEqual(math(1, 2), 3)
})

and the following tsconfig.json:

{
  "$schema": "https://json.schemastore.org/tsconfig",
  "compilerOptions": {
    "outDir": "dist",
    "sourceMap": true,
    "target": "ES2022",
    "module": "NodeNext",
    "moduleResolution": "NodeNext",
    "esModuleInterop": true,
    "strict": true,
    "resolveJsonModule": true,
    "removeComments": true,
    "newLine": "lf",
    "noUnusedLocals": true,
    "noFallthroughCasesInSwitch": true,
    "isolatedModules": true,
    "forceConsistentCasingInFileNames": true,
    "skipLibCheck": true,
    "lib": [
      "ESNext"
    ],
    "incremental": true
  }
}

Note the use of incremental: true, which speed up compilation massively.

• --concurrency or -c, to set the number of concurrent tests. Defaults to the number of available CPUs minus one.
• --coverage or -C, enables code coverage
• --only or -o, only run node:test with the only option set
• --watch or -w, re-run tests on changes
• --timeout or -t, timeouts the tests after a given time; default is 30000 ms
• --no-timeout, disables the timeout
• --coverage-exclude or -X, a list of comma-separated patterns to exclude from the coverage report. All tests files are ignored by default.
• --ignore or -i, ignore a glob pattern, and not look for tests there
• --expose-gc, exposes the gc() function to tests
• --pattern or -p, run tests matching the given glob pattern
• --reporter or -r, set up a reporter, use a colon to set a file destination. Reporter may either be a module name resolvable by standard node_modules resolution, or a path to a script relative to the process working directory (must be an ESM script). Default: spec.
• --no-typescript or -T, disable automatic TypeScript compilation if tsconfig.json is found.
• --post-compile or -P, the path to a file that will be executed after each typescript compilation.
• --check-coverage, enables c8 check coverage; default is false

• --lines, set the lines threshold when check coverage is active; default is 100
• --functions, set the functions threshold when check coverage is active; default is 100
• --statements, set the statements threshold when check coverage is active; default is 100
• --branches, set the branches threshold when check coverage is active; default is 100

Here are the available reporters:

• gh: emits ::error workflow commands for GitHub Actions to show inlined errors. Enabled by default when running on GHA.
• tap: outputs the test results in the TAP format.
• spec: outputs the test results in a human-readable format.
• dot: outputs the test results in a compact format, where each passing test is represented by a ., and each failing test is represented by a X.
• junit: outputs test results in a jUnit XML format

MIT