This action installs volta by:

• downloading and caching volta (adding it to your $PATH)
• optionally downloading and caching a version of node - npm by version spec and add to PATH

See action.yml

Basic (when the project's package.json has a volta property with node and/or yarn versions pinned):

steps:
- uses: actions/checkout@v1
- uses: rwjblue/setup-volta@v1
- run: npm install
- run: npm test

Manually specifying node and/or yarn versions (e.g. to test a project without volta in package.json):

steps:
- uses: actions/checkout@v1
- uses: rwjblue/setup-volta@v1
  with:
    node-version: 10.x
    yarn-version: 1.19.1

- run: yarn install
- run: yarn test

Setting up a matrix of node versions:

strategy:
  matrix:
    node-version: ['^8.12', '10', '12']

steps:
- uses: actions/checkout@v1
- uses: rwjblue/setup-volta@v1
  with:
    node-version: ${{ matrix.node-version }}

- run: npm install
- run: npm test

The scripts and documentation in this project are released under the MIT License