client_test.rb

require 'test_helper'

class TestClient < CheddarTest
  def test_that_it_authenticates
    client = Factory.create(:client)
    assert_equal Client.authenticate(client.client_id, client.client_secret), client
    refute_equal Client.authenticate(client.client_id, client.client_id), client
  end
end

Gemfile

group :test do
  gem 'miniskirt', require: false
  gem 'faker'
  gem 'minitest'
  gem 'minitest-wscolor'
  gem 'rack-test', require: false
  gem 'mocha', require: false
  gem 'capybara', require: false
  # gem 'show_me_the_cookies'
  gem 'simplecov', require: false
  gem 'm', require: false
end

test_helper.rb

require 'simplecov'
SimpleCov.start 'rails'

ENV['RAILS_ENV'] = 'test'
require File.expand_path('../../config/environment', __FILE__)

require 'rubygems'
gem 'minitest'
require 'minitest/autorun'
require 'action_controller/test_case'

require 'miniskirt'
require 'capybara/rails'
require 'mocha'

# Support files
Dir["#{File.expand_path(File.dirname(__FILE__))}/support/*.rb"].each do |file|
  require file
end

class CheddarTest < MiniTest::Unit::TestCase
  include ActiveSupport::Testing::SetupAndTeardown
  include Rails.application.routes.url_helpers
  include MailerMacros
end