app_generator_test.rb

require 'abstract_unit'
require 'generators/generators_test_helper'
require 'rails/generators/rails/app/app_generator'

DEFAULT_APP_FILES = %w(
  .gitignore
  Gemfile
  Rakefile
  config.ru
  app/controllers
  app/helpers
  app/models
  app/views/layouts
  config/environments
  config/initializers
  config/locales
  db
  doc
  lib
  lib/tasks
  log
  public/images
  public/javascripts
  public/stylesheets
  script/rails
  test/fixtures
  test/functional
  test/integration
  test/performance
  test/unit
  vendor
  vendor/plugins
  tmp/sessions
  tmp/sockets
  tmp/cache
  tmp/pids
)

class AppGeneratorTest < Rails::Generators::TestCase
  include GeneratorsTestHelper
  arguments [destination_root]

  def setup
    super
    Rails::Generators::AppGenerator.instance_variable_set('@desc', nil)
    @bundle_command = File.basename(Thor::Util.ruby_command).sub(/ruby/, 'bundle')
  end

  def teardown
    super
    Rails::Generators::AppGenerator.instance_variable_set('@desc', nil)
  end

  def test_application_skeleton_is_created
    run_generator

    DEFAULT_APP_FILES.each{ |path| assert_file path }
  end

  def test_application_controller_and_layout_files
    run_generator
    assert_file "app/views/layouts/application.html.erb", /stylesheet_link_tag :all/
    assert_no_file "public/stylesheets/application.css"
  end

  def test_options_before_application_name_raises_an_error
    content = capture(:stderr){ run_generator(["--skip-activerecord", destination_root]) }
    assert_equal "Options should be given after the application name. For details run: rails --help\n", content
  end

  def test_name_collision_raises_an_error
    reserved_words = %w[application destroy plugin runner test]
    reserved_words.each do |reserved|
      content = capture(:stderr){ run_generator [File.join(destination_root, reserved)] }
      assert_equal "Invalid application name #{reserved}. Please give a name which does not match one of the reserved rails words.\n", content      
    end
  end

  def test_invalid_database_option_raises_an_error
    content = capture(:stderr){ run_generator([destination_root, "-d", "unknown"]) }
    assert_match /Invalid value for \-\-database option/, content
  end

  def test_invalid_application_name_raises_an_error
    content = capture(:stderr){ run_generator [File.join(destination_root, "43-things")] }
    assert_equal "Invalid application name 43-things. Please give a name which does not start with numbers.\n", content
  end

  def test_application_name_raises_an_error_if_name_already_used_constant
    %w{ String Hash Class Module Set Symbol }.each do |ruby_class|
      content = capture(:stderr){ run_generator [File.join(destination_root, ruby_class)] }
      assert_equal "Invalid application name #{ruby_class}, constant #{ruby_class} is already in use. Please choose another application name.\n", content
    end
  end

  def test_invalid_application_name_is_fixed
    run_generator [File.join(destination_root, "things-43")]
    assert_file "things-43/config/environment.rb", /Things43::Application\.initialize!/
    assert_file "things-43/config/application.rb", /^module Things43$/
  end

  def test_application_names_are_not_singularized
    run_generator [File.join(destination_root, "hats")]
    assert_file "hats/config/environment.rb", /Hats::Application\.initialize!/
  end

  def test_config_database_is_added_by_default
    run_generator
    assert_file "config/database.yml", /sqlite3/
    assert_file "Gemfile", /^gem\s+["']sqlite3-ruby["'],\s+:require\s+=>\s+["']sqlite3["']$/
  end

  def test_config_another_database
    run_generator([destination_root, "-d", "mysql"])
    assert_file "config/database.yml", /mysql/
    assert_file "Gemfile", /^gem\s+["']mysql["']$/
  end

  def test_config_database_is_not_added_if_skip_activerecord_is_given
    run_generator [destination_root, "--skip-activerecord"]
    assert_no_file "config/database.yml"
  end

  def test_activerecord_is_removed_from_frameworks_if_skip_activerecord_is_given
    run_generator [destination_root, "--skip-activerecord"]
    assert_file "config/application.rb", /#\s+require\s+["']active_record\/railtie["']/
  end

  def test_prototype_and_test_unit_are_added_by_default
    run_generator
    assert_file "public/javascripts/prototype.js"
    assert_file "test"
  end

  def test_prototype_and_test_unit_are_skipped_if_required
    run_generator [destination_root, "--skip-prototype", "--skip-testunit"]
    assert_no_file "public/javascripts/prototype.js"
    assert_file "public/javascripts"
    assert_no_file "test"
  end

  def test_shebang_is_added_to_rails_file
    run_generator [destination_root, "--ruby", "foo/bar/baz"]
    assert_file "script/rails", /#!foo\/bar\/baz/
  end

  def test_shebang_when_is_the_same_as_default_use_env
    run_generator [destination_root, "--ruby", Thor::Util.ruby_command]
    assert_file "script/rails", /#!\/usr\/bin\/env/
  end

  def test_template_from_dir_pwd
    FileUtils.cd(Rails.root)
    assert_match /It works from file!/, run_generator([destination_root, "-m", "lib/template.rb"])
  end

  def test_template_raises_an_error_with_invalid_path
    content = capture(:stderr){ run_generator([destination_root, "-m", "non/existant/path"]) }
    assert_match /The template \[.*\] could not be loaded/, content
    assert_match /non\/existant\/path/, content
  end

  def test_template_is_executed_when_supplied
    path = "http://gist.github.com/103208.txt"
    template = %{ say "It works!" }
    template.instance_eval "def read; self; end" # Make the string respond to read

    generator([destination_root], :template => path).expects(:open).with(path, 'Accept' => 'application/x-thor-template').returns(template)
    assert_match /It works!/, silence(:stdout){ generator.invoke }
  end

  def test_usage_read_from_file
    File.expects(:read).returns("USAGE FROM FILE")
    assert_equal "USAGE FROM FILE", Rails::Generators::AppGenerator.desc
  end

  def test_default_usage
    File.expects(:exist?).returns(false)
    assert_match /Create rails files for app generator/, Rails::Generators::AppGenerator.desc
  end

  def test_default_namespace
    assert_match "rails:app", Rails::Generators::AppGenerator.namespace
  end

  def test_file_is_added_for_backwards_compatibility
    action :file, 'lib/test_file.rb', 'heres test data'
    assert_file 'lib/test_file.rb', 'heres test data'
  end

  def test_dev_option
    generator([destination_root], :dev => true).expects(:run).with("#{@bundle_command} install")
    silence(:stdout){ generator.invoke }
    rails_path = File.expand_path('../../..', Rails.root)
    assert_file 'Gemfile', /^gem\s+["']rails["'],\s+:path\s+=>\s+["']#{Regexp.escape(rails_path)}["']$/
  end

  def test_edge_option
    generator([destination_root], :edge => true).expects(:run).with("#{@bundle_command} install")
    silence(:stdout){ generator.invoke }
    assert_file 'Gemfile', /^gem\s+["']rails["'],\s+:git\s+=>\s+["']#{Regexp.escape("git://github.com/rails/rails.git")}["']$/
  end

protected

  def action(*args, &block)
    silence(:stdout){ generator.send(*args, &block) }
  end

end

class CustomAppGeneratorTest < Rails::Generators::TestCase
  include GeneratorsTestHelper
  tests Rails::Generators::AppGenerator

  arguments [destination_root]

  def setup
    super
    Rails::Generators::AppGenerator.instance_variable_set('@desc', nil)
    @bundle_command = File.basename(Thor::Util.ruby_command).sub(/ruby/, 'bundle')
  end

  def teardown
    super
    Rails::Generators::AppGenerator.instance_variable_set('@desc', nil)
    Object.class_eval { remove_const :AppBuilder if const_defined?(:AppBuilder) }
  end

  def test_builder_option_with_empty_app_builder
    FileUtils.cd(Rails.root)
    run_generator([destination_root, "-b", "#{Rails.root}/lib/empty_builder.rb"])
    DEFAULT_APP_FILES.each{ |path| assert_no_file path }
  end

  def test_builder_option_with_simple_app_builder
    FileUtils.cd(Rails.root)
    run_generator([destination_root, "-b", "#{Rails.root}/lib/simple_builder.rb"])
    (DEFAULT_APP_FILES - ['config.ru']).each{ |path| assert_no_file path }
    assert_file "config.ru", %[run proc { |env| [200, { "Content-Type" => "text/html" }, ["Hello World"]] }]
  end

  def test_builder_option_with_relative_path
    here = File.expand_path(File.dirname(__FILE__))
    FileUtils.cd(here)
    run_generator([destination_root, "-b", "../fixtures/lib/simple_builder.rb"])
    (DEFAULT_APP_FILES - ['config.ru']).each{ |path| assert_no_file path }
    assert_file "config.ru", %[run proc { |env| [200, { "Content-Type" => "text/html" }, ["Hello World"]] }]
  end

  def test_builder_option_with_tweak_app_builder
    FileUtils.cd(Rails.root)
    run_generator([destination_root, "-b", "#{Rails.root}/lib/tweak_builder.rb"])
    DEFAULT_APP_FILES.each{ |path| assert_file path }
    assert_file "config.ru", %[run proc { |env| [200, { "Content-Type" => "text/html" }, ["Hello World"]] }]
  end

  def test_builder_option_with_http
    path = "http://gist.github.com/103208.txt"
    template = "class AppBuilder; end"
    template.instance_eval "def read; self; end" # Make the string respond to read

    generator([destination_root], :builder => path).expects(:open).with(path, 'Accept' => 'application/x-thor-template').returns(template)
    capture(:stdout) { generator.invoke }

    DEFAULT_APP_FILES.each{ |path| assert_no_file path }
  end

protected

  def action(*args, &block)
    silence(:stdout){ generator.send(*args, &block) }
  end
end