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e2e End to End testing

Testing the integrity of React components by publishing in a private registry

E2E and Verdaccio

Some projects organize packages in multi-packages repositories or monorepos. E2E testing is a topic that usually is only relevant for User Interfaces, but from a Node.js perspective, publishing packages also need to be tested.

import { Tweet } from 'react-twitter-widgets'

<Tweet tweetId="951427674844680192" options={{
  dnt: true,
  align: 'center'
}} />

Such approach has been really hard to achieve considering:

  • Populate canary packages on public services seems not to be a good idea
  • Some self-hosted OSS registries are too heavy
  • Offline environments (private networks)

Verdaccio is a lightweight registry with zero-configuration that fits perfectly in any E2E + CI workflow.

Implementation

There is no a silver bullet yet, each implementation seems to be specific for each project, you can check some of them in the following thread clicking here.

Example using Bash

This is the most simple example using Verdaccio in a bash script (extracted from create-react-app).

#!/bin/sh

set -e

local_registry="http://0.0.0.0:4873"

# start local registry
tmp_registry_log=`mktemp`
sh -c "mkdir -p $HOME/.config/verdaccio"
sh -c "cp --verbose /config.yaml $HOME/.config/verdaccio/config.yaml"
sh -c "nohup verdaccio --config $HOME/.config/verdaccio/config.yaml &>$tmp_registry_log &"
# wait for `verdaccio` to boot
grep -q 'http address' <(tail -f $tmp_registry_log)
# login so we can publish packages
sh -c "npm-auth-to-token -u test -p test -e test@test.com -r $local_registry"
# Run nmp command
sh -c "npm --registry $local_registry publish"

Who is using it for E2E?