rails--rails/railties/test/generators/helper_generator_test.rb

require 'abstract_unit'
require 'generators/generators_test_helper'
require 'generators/rails/helper/helper_generator'
require 'generators/test_unit/helper/helper_generator'

ObjectHelper = Class.new
AnotherObjectHelperTest = Class.new

class HelperGeneratorTest < GeneratorsTestCase

  def test_helper_skeleton_is_created
    run_generator
    assert_file "app/helpers/admin_helper.rb", /module AdminHelper/
  end

  def test_invokes_default_test_framework
    run_generator
    assert_file "test/unit/helpers/admin_helper_test.rb", /class AdminHelperTest < ActionView::TestCase/
  end

  def test_logs_if_the_test_framework_cannot_be_found
    content = run_generator ["admin", "--test-framework=unknown"]
    assert_match /Could not find and invoke 'unknown:generators:helper'/, content
  end

  def test_check_class_collision
    content = capture(:stderr){ run_generator ["object"] }
    assert_match /The name 'ObjectHelper' is either already used in your application or reserved/, content
  end

  def test_check_class_collision_on_tests
    content = capture(:stderr){ run_generator ["another_object"] }
    assert_match /The name 'AnotherObjectHelperTest' is either already used in your application or reserved/, content
  end

  protected

    def run_generator(args=["admin"])
      silence(:stdout) { Rails::Generators::HelperGenerator.start args, :root => destination_root }
    end

end