A RuboCop extension focused on enforcing Minitest best practices and coding conventions. The library is based on the guidelines outlined in the community Minitest Style Guide.

Just install the rubocop-minitest gem

$ gem install rubocop-minitest

or if you use bundler put this in your Gemfile

gem 'rubocop-minitest', require: false

You need to tell RuboCop to load the Minitest extension. There are three ways to do this:

Put this into your .rubocop.yml.

plugins: rubocop-minitest

Alternatively, use the following array notation when specifying multiple extensions.

plugins:
  - rubocop-other-extension
  - rubocop-minitest

Now you can run rubocop and it will automatically load the RuboCop Minitest cops together with the standard cops.

$ rubocop --plugin rubocop-minitest

require 'rubocop/rake_task'

RuboCop::RakeTask.new do |task|
  task.plugins << 'rubocop-minitest'
end

All cops are located under lib/rubocop/cop/minitest, and contain examples/documentation. The documentation is published here.

In your .rubocop.yml, you may treat the Minitest cops just like any other cop. For example:

Minitest/AssertNil:
  Exclude:
    - test/my_file_to_ignore_test.rb

You can read a lot more about RuboCop Minitest in its official docs.

If you use RuboCop Minitest in your project, you can include one of these badges in your readme to let people know that your code is written following the community Minitest Style Guide.

Here are the Markdown snippets for the two badges:

[![Minitest Style Guide](https://img.shields.io/badge/code_style-rubocop-brightgreen.svg)](https://github.com/rubocop/rubocop-minitest)

[![Minitest Style Guide](https://img.shields.io/badge/code_style-community-brightgreen.svg)](https://minitest.rubystyle.guide)

Checkout the contribution guidelines.

rubocop-minitest is MIT licensed. See the accompanying file for the full text.