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

require 'generators/generators_test_helper'
require 'rails/generators/rails/mailer/mailer_generator'

class MailerGeneratorTest < Rails::Generators::TestCase
  include GeneratorsTestHelper
  arguments %w(notifier foo bar)

  def test_mailer_skeleton_is_created
    run_generator
    assert_file "app/mailers/notifier.rb" do |mailer|
      assert_match /class Notifier < ActionMailer::Base/, mailer
      assert_match /default :from => "from@example.com"/, mailer
    end
  end

  def test_mailer_with_i18n_helper
    run_generator
    assert_file "app/mailers/notifier.rb" do |mailer|
      assert_match /en\.actionmailer\.notifier\.foo\.subject/, mailer
      assert_match /en\.actionmailer\.notifier\.bar\.subject/, mailer
    end
  end

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

  def test_invokes_default_test_framework
    run_generator
    assert_file "test/functional/notifier_test.rb" do |test|
      assert_match /class NotifierTest < ActionMailer::TestCase/, test
      assert_match /test "foo"/, test
      assert_match /test "bar"/, test
    end
  end

  def test_invokes_default_template_engine
    run_generator
    assert_file "app/views/notifier/foo.text.erb" do |view|
      assert_match %r(app/views/notifier/foo\.text\.erb), view
      assert_match /<%= @greeting %>/, view
    end

    assert_file "app/views/notifier/bar.text.erb" do |view|
      assert_match %r(app/views/notifier/bar\.text\.erb), view
      assert_match /<%= @greeting %>/, view
    end
  end

  def test_invokes_default_template_engine_even_with_no_action
    run_generator ["notifier"]
    assert_file "app/views/notifier"
  end

  def test_logs_if_the_template_engine_cannot_be_found
    content = run_generator ["notifier", "foo", "bar", "--template-engine=haml"]
    assert_match /haml \[not found\]/, content
  end

  def test_actions_are_turned_into_methods
    run_generator

    assert_file "app/mailers/notifier.rb" do |mailer|
      assert_instance_method :foo, mailer do |foo|
        assert_match /mail :to => "to@example.org"/, foo
        assert_match /@greeting = "Hi"/, foo
      end

      assert_instance_method :bar, mailer do |bar|
        assert_match /mail :to => "to@example.org"/, bar
        assert_match /@greeting = "Hi"/, bar
      end
    end

  end
end