Minitest Rails setup

Gemfile

group :test, :development do
  gem 'minitest-rails'
end

group :test do
  gem "minitest-rails-capybara"
end

minitest_helper.rb

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

require "minitest/autorun"
require "minitest/spec"
require "minitest/rails"
require "minitest/rails/capybara"
require "minitest/pride"
require "minitest_let"

class MiniTest::Rails::ActiveSupport::TestCase
  # Setup all fixtures in test/fixtures/*.(yml|csv) for all tests in alphabetical order.
  fixtures :all

  # Add more helper methods to be used by all tests here...
end

# Do you want all existing Rails tests to use MiniTest::Rails?
# Comment out the following and either:
# A) Change the require on the existing tests to `require "minitest_helper"`
# B) Require this file's code in test_helper.rb

MiniTest::Rails.override_testunit!

minitest_let.rb

require 'minitest/spec'
require 'minitest/autorun'


module Helpers
  module Let
    def let(name, &blk)      
      define_method name do
        @let_assigments ||= {}
        @let_assigments[name] ||= send(:"original_#{name}")
      end
      define_method "original_#{name}", &blk
    end
  end
end

class MiniTest::Unit::TestCase
  extend Helpers::Let
end

test_helper.rb

require "minitest_helper"