Registry / testing / rollup-plugin-power-assert

rollup-plugin-power-assert

library0.2.0jsnpmunverified

Rollup and Vite plugin for power-assert, providing descriptive assertion messages through the standard Node.js assert interface. Current stable version is 0.2.0. It transforms assertion expressions (e.g., assert(ary.indexOf(zero) === two)) into detailed, labeled output showing intermediate values. The library supports both Rollup and Vite/Vitest with minimal configuration, and is part of the power-assert monorepo. Key differentiators include zero API overhead and compatibility with Vitest's assert API.

testing

npm install rollup-plugin-power-assert

github ↗package ↗

INSTALL

IMPORT

SIG · ROLLUP-PLUGIN-POWE

rollup-plugin-power-assert

testingjavascriptv0.2.0

Install

—

Import

—

Disk

—

Pass rate

0/ 6

Env Coverage0 / 6

glibc

18–22

musl

18–22

Install & Compatibility

Where this runs

tested against v? · npm install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

node 18–223 runs

build_error

glibc

node 18–223 runs

build_error

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

powerAssert

✓ import { powerAssert } from 'rollup-plugin-power-assert'

✗ import powerAssert from 'rollup-plugin-power-assert'

Must use named import; default import is not available.

powerAssert (CommonJS)

✓ const { powerAssert } = require('rollup-plugin-power-assert')

✗ const powerAssert = require('rollup-plugin-power-assert')

CommonJS requires destructuring; the module exports an object with named exports.

type definition

✓ import type { PowerAssertOptions } from 'rollup-plugin-power-assert'

TypeScript types are included; use named type import for configuration options.

Configure Vite/Vitest with the powerAssert plugin to enable descriptive assertion messages in test files.

import { defineConfig } from 'vite'; import { powerAssert } from 'rollup-plugin-power-assert'; const testPattern = 'examples/**/__tests__/**/*.test.mts'; export default defineConfig({ plugins: [ powerAssert({ include: testPattern, }), ], test: { include: testPattern, }, });

Debug

Known issues

gotchaThe plugin transforms assert() calls only; it does not transform other assertion libraries like chai or expect.

fix

Use Node.js assert module or Vitest's assert API. For other libraries, consider alternative power-assert wrappers.

affects: >=0.1.0

gotchaThe plugin requires the @power-assert/runtime package as a peer dependency. Failing to install it can result in runtime errors.

fix

Install the peer dependency: npm install --save-dev @power-assert/runtime

affects: >=0.2.0

deprecatedThe plugin may be deprecated in future versions of power-assert monorepo; check for migration notes.

fix

Monitor the repository for deprecation notices and plan migration to alternative assertion enhancement tools.

affects: >=0.1.0

Errors

Common errors & fixes

Cannot find module '@power-assert/runtime'

Missing peer dependency @power-assert/runtime

fix

npm install --save-dev @power-assert/runtime

TypeError: (0 , _rollupPluginPowerAssert.powerAssert) is not a function

Using default import instead of named import

fix

Change to: import { powerAssert } from 'rollup-plugin-power-assert'

AssertionError: assert(...) expression not transformed

The file is not included in the plugin's include pattern

fix

Ensure the file path matches the include glob pattern in the plugin options.

Upgrade

Version history

0.2.0latest on npm

Audit

Dependencies

@power-assert/runtimerequiredrequired peer dependency for runtime assertion enhancement

Agent activity

10 hits · last 30 days

node

Amazon

Anthropic

Resources

githubhttps://github.com/twada/power-assert-monorepo ↗

packagehttps://www.npmjs.com/package/rollup-plugin-power-assert ↗