mocha

@dotcom-tool-kit/mocha

Tool Kit plugin to run Mocha

Installation & Usage

With Tool Kit already set up, install this plugin as a dev dependency:

npm install --save-dev @dotcom-tool-kit/mocha

And add it to your repo's .toolkitrc.yml:

plugins:
  - '@dotcom-tool-kit/mocha'

Options

Key	Description	Default value
files	A file path glob to Mocha tests	'test/**/*.js'
configPath	Path to the Mocha config file	use Mocha's own config resolution

Tasks

Task	Description	Preconfigured hook
Mocha	runs mocha to execute tests	test:local, test:ci

Tips

Resolving test hook conflicts

A common use case is to configure test:local and test:ci in your .toolkitrc.yml to run the Eslint task then the relevant Mocha task:

hooks:
  test:local:
    - Eslint
    - Mocha
  test:ci:
    - Eslint
    - Mocha

Reporting code coverage

If you want to test the coverage of your code (i.e., how many lines of your code are executed by your unit tests) you can use the Istanbul tool that integrates with Mocha. To use Istanbul, install the command line interface, nyc, by running

npm install --save-dev nyc

and then adding a new script to your package.json that just runs the Tool Kit test:local hook (which should in turn run your Mocha tests) with the nyc command prepended to it:

{
  "scripts": {
    "test": "dotcom-tool-kit test:local",
    "coverage": "nyc npm run test"
  }
}