@lg-tools/test

Shared test config & scripts for LeafyGreen repositories.

Usage

It's best not to use this as a standalone package, but use it as part of @lg-tools/cli instead.

To run tests using the shared config, use the lg cli:

> lg test

Options

To see all options for this command run:

> lg test --help

Extending & overriding the shared config

To extend/override the shared config (located in @lg-tools/test/config), create a jest.config.js file at the root of the repository, and extend the default config with the code below:

// ./jest.config.js
const jestConfig = require('@lg-tools/test/config/js.config.js');

module.exports = {
  ...jestConfig,
  // extend your jest config here
};

You can also pass a --config option to the test command:

> lg test --config ./path/to/config

Testing in React 17

In CI we test our components using React 17.

To do this manually, first run the init script in order to install the specific testing dependencies needed for React 17. (yarn init17 from the repo root)

> yarn init17

Next, run your tests with the --react17 flag. This ensures that the tests are run with specific Jest config for React 17.

> yarn test --react17

To go back to the default version of React you'll need to clear your packages and re-build:

> yarn clean:modules && yarn run init