top-n-test

Smoke tests for the top-100 most popular npm packages. Each package has a hand-written test that exercises the library the way a real developer would use it. The suite can run against multiple runtimes (Node.js, EdgeJS, WASIX EdgeJS) to verify compatibility.

Updating the package list

The top-100 list is based on npm last-year downloads and is locked by default. To refresh it:

node scripts/fetch-top-packages.js --count=100 --candidate-limit=500 --allow-update

Without --allow-update, the script refuses to overwrite the locked top-packages.json.

Running tests

Three runners are available via -r / --runner:

Runner	Command	Env vars
Node.js	node runner.js -r node --all	—
EdgeJS	node runner.js -r edgejs --all	EDGEJS_BIN (default: edgejs)
WASIX EdgeJS	node runner.js -r wasix_edgejs --all	see below

The wasix_edgejs runner uses wasmer-dev to run tests inside the EdgeJS WASIX runtime. Configurable env vars:

Env var	Default	Description
WASMER_BIN	wasmer-dev	Path to the Wasmer binary
EDGEJS_PACKAGE	wasmer/edgejs	Wasmer package to run
WASMER_REGISTRY	wasmer.io	Wasmer registry URL

Run a single package

node runner.js -r node chalk

Skip specific packages

node runner.js -r node --all --skip ws,express

Continue past failures

By default the runner stops on the first failure. To run everything:

node runner.js -r node --all --no-fail-fast

List available packages

node runner.js --list