Extend rails functional test case with asserts for missing translations.

translation_missing_asserts.rb

# Extend functional test case with asserts for missing translations.
# These asserts are automatically included on +assert_response+ and
# +should_respond_with+.

class ActionController::TestCase
  def assert_no_missing_translations
    assert(@response.body !~ %r{ class=.*translation_missing.*?(>|&gt;)(.+?)(<|&lt;\\?)/span},
           "missing translation in body: #{$2.inspect}")
    assert(@response.body !~ /^translation missing: (.*)$/,
           "missing translation in body: #{$1.inspect}")
    assert(flash.values.join("\n") !~ /^translation missing: (.*)$/,
           "missing translation in flash: #{$1.inspect}")
  end

  def assert_response_with_no_missing_translations(*args)
    assert_response_without_no_missing_translations(*args)
    assert_no_missing_translations
  end

  alias_method_chain :assert_response, :no_missing_translations

  if defined?(Shoulda)
    def self.should_not_miss_translations
      should "not miss translations" do
        assert_no_missing_translations
      end
    end

    class << self
      def should_respond_with_with_no_missing_translations(*args)
        should_respond_with_without_no_missing_translations(*args)
        should_not_miss_translations
      end
    
      alias_method_chain :should_respond_with, :no_missing_translations
    end
  end
end if RAILS_ENV == "test"