Running all MiniTest Tests with SimpleCov

.gitignore

test/coverage/

Rakefile

require 'rake/testtask'

Rake::TestTask.new do |t|
  t.pattern = "test/**/*_test.rb"     # This expects your tests to be inside a test subfolder
end                                   # and end with '_test.rb`
                                      # Run all your test files from the terminal with "rake test"

test_helper.rb

require 'simplecov'            # These two lines must go first
SimpleCov.start

require 'minitest/autorun'     # Sets up minitest
                               # You could require other shared gems here, too

your_class.rb

class YourClass      # Nothing special/unusual here
end

your_test.rb

require_relative 'test_helper'   # require test_helper first
require_relative 'your_class'    # require whatever class(es) you're testing

class YourClassTest < Minitest::Test
  def test_it_does_stuff         # write your tests like normal
    assert_equal 100, 100
  end
end