RSpec to Minitest

migration.md

These are the scripts that I used to migrate from RSpec to Minitest in a Rails aplication.

It is expected for the test suite to be in RSpec 3.x sintax.

1. Install rename library from Homebrew
2. Remove RSpec/TestUnit from Gemfile
3. Add minitest-rails gem
4. Rename spec forder to test
5. Add a test_helper.rb file

ENV["RAILS_ENV"] = "test"

require File.expand_path("../../config/environment", __FILE__)
require "rails/test_help"
require "minitest/rails"

# To add Capybara feature tests add `gem "minitest-rails-capybara"`
# to the test group in the Gemfile and uncomment the following:
# require "minitest/rails/capybara"

# Uncomment for awesome colorful output
# require "minitest/pride"

Dir[Rails.root.join("test/support/**/*.rb")].each { |file| require file }

module ActiveSupport
  class TestCase
    # Setup all fixtures in test/fixtures/*.yml for all tests in
    # alphabetical order.
    fixtures :all
    # Add more helper methods to be used by all tests here...
  end
end

6. Rename all spec files with

find . -name *_spec.rb -exec rename 's|_spec|_test|' {} \;

7. Change sintax to Minitest

find . -name '*_test.rb' -exec sed -ie 's/context/describe/g' {} \;
find . -name '*_test.rb' -exec sed -ie 's/stub(/stubs(/g' {} \;
find . -name '*_test.rb' -exec sed -ie 's/double/stub/g' {} \;
find . -name '*_test.rb' -exec sed -ie 's/should_receive/expects/g' {} \;
find . -name '*_test.rb' -exec sed -ie 's/and_return/returns/g' {} \;
find . -name '*_test.rb' -exec sed -ie 's/expect(//g' {} \;
find . -name '*_test.rb' -exec sed -ie 's/).to be ==/.must_equal/g' {} \;
find . -name '*_test.rb' -exec sed -ie 's/).to eq/.must_equal/g' {} \;
find . -name '*_test.rb' -exec sed -ie 's/).to be_empty/.must_be_empty/g' {} \;
find . -name '*_test.rb' -exec sed -ie 's/).to_not be_empty/.wont_be_empty/g' {} \;
find . -name '*_test.rb' -exec sed -ie 's/).to be_kind_of/.must_be_kind_of/g' {} \;
find . -name '*_test.rb' -exec sed -ie ’s/(response).to have_http_status/.must_respond_with/g’ {} \;
find . -name '*_test.rb' -exec sed -ie 's/).to redirect_to/.must_redirect_to/g' {} \;
find . -name '*_test.rb' -exec sed -ie 's/RSpec.//g' {} \;
find . -name '*_test.rb' -exec sed -ie 's/).to match/.must_match/g' {} \;

8. Integration tests name muest end with Integration Test