Guardfile

# A sample Guardfile
# More info at https://github.com/guard/guard#readme

## Uncomment and set this to only include directories you want to watch
# directories %w(app lib config test spec features) \
#  .select{|d| Dir.exist?(d) ? d : UI.warning("Directory #{d} does not exist")}

## Note: if you are using the `directories` clause above and you are not
## watching the project directory ('.'), then you will want to move
## the Guardfile to a watched dir and symlink it back, e.g.
#
#  $ mkdir config
#  $ mv Guardfile config/
#  $ ln -s config/Guardfile .
#
# and, you'll have to watch "config/Guardfile" instead of "Guardfile"

guard :minitest, spring: "bin/rails test", all_on_start: false do
  # with Minitest::Unit
  watch(%r{^test/(.*)\/?_test\.rb$})
  watch(%r{^test/(.*)\/?test_(.*)\.rb$})
  watch(%r{^lib/(.*/)?([^/]+)\.rb$})     { |m| "test/#{m[1]}test_#{m[2]}.rb" }
  watch(%r{^test/test_helper\.rb$})      { 'test' }
  watch(%r{^app/models/(.*?)\.rb$}) do |matches|
    "test/models/#{matches[1]}_test.rb"
  end
  watch(%r{^app/controllers/(.*?)_controller\.rb$}) do |matches|
    resource_tests(matches[1])
  end
  watch(%r{^app/views/([^/]*?)/.*\.html\.erb$}) do |matches|
    ["test/controllers/#{matches[1]}_controller_test.rb"] +
    integration_tests(matches[1])
  end
  watch(%r{^app/helpers/(.*?)_helper\.rb$}) do |matches|
    integration_tests(matches[1])
  end
    
  # Returns the integration tests corresponding to the given resource.
  def integration_tests(resource = :all)
    if resource == :all
      Dir["test/integration/*"]
    else
      Dir["test/integration/#{resource}_*.rb"]
    end
  end
  
  # Returns the controller tests corresponding to the given resource.
  def controller_test(resource)
    "test/controllers/#{resource}_controller_test.rb"
  end
  
  # Returns all tests for the given resource.
  def resource_tests(resource)
    integration_tests(resource) << controller_test(resource)
  end
end