1 files changed, 181 insertions, 0 deletions
diff --git a/railties/test/generators/api_app_generator_test.rb b/railties/test/generators/api_app_generator_test.rb
new file mode 100644
index 0000000000..4b9878187b
--- /dev/null
+++ b/railties/test/generators/api_app_generator_test.rb
@@ -0,0 +1,181 @@
+# frozen_string_literal: true
+
+require "generators/generators_test_helper"
+require "rails/generators/rails/app/app_generator"
+
+class ApiAppGeneratorTest < Rails::Generators::TestCase
+  include GeneratorsTestHelper
+  tests Rails::Generators::AppGenerator
+
+  arguments [destination_root, "--api"]
+
+  def setup
+    Rails.application = TestApp::Application
+    super
+
+    Kernel.silence_warnings do
+      Thor::Base.shell.attr_accessor :always_force
+      @shell = Thor::Base.shell.new
+      @shell.always_force = true
+    end
+  end
+
+  def teardown
+    super
+    Rails.application = TestApp::Application.instance
+  end
+
+  def test_skeleton_is_created
+    run_generator
+
+    default_files.each { |path| assert_file path }
+    skipped_files.each { |path| assert_no_file path }
+  end
+
+  def test_api_modified_files
+    run_generator
+
+    assert_file ".gitignore" do |content|
+      assert_no_match(/\/public\/assets/, content)
+    end
+
+    assert_file "Gemfile" do |content|
+      assert_no_match(/gem 'sass-rails'/, content)
+      assert_no_match(/gem 'web-console'/, content)
+      assert_no_match(/gem 'capybara'/, content)
+      assert_no_match(/gem 'selenium-webdriver'/, content)
+      assert_match(/# gem 'jbuilder'/, content)
+      assert_match(/# gem 'rack-cors'/, content)
+    end
+
+    assert_file "config/application.rb", /config\.api_only = true/
+    assert_file "app/controllers/application_controller.rb", /ActionController::API/
+  end
+
+  def test_generator_if_skip_action_cable_is_given
+    run_generator [destination_root, "--api", "--skip-action-cable"]
+    assert_file "config/application.rb", /#\s+require\s+["']action_cable\/engine["']/
+    assert_no_file "config/cable.yml"
+    assert_no_file "app/channels"
+    assert_file "Gemfile" do |content|
+      assert_no_match(/redis/, content)
+    end
+  end
+
+  def test_generator_if_skip_action_mailer_is_given
+    run_generator [destination_root, "--api", "--skip-action-mailer"]
+    assert_file "config/application.rb", /#\s+require\s+["']action_mailer\/railtie["']/
+    assert_file "config/environments/development.rb" do |content|
+      assert_no_match(/config\.action_mailer/, content)
+    end
+    assert_file "config/environments/test.rb" do |content|
+      assert_no_match(/config\.action_mailer/, content)
+    end
+    assert_file "config/environments/production.rb" do |content|
+      assert_no_match(/config\.action_mailer/, content)
+    end
+    assert_no_directory "app/mailers"
+    assert_no_directory "test/mailers"
+    assert_no_directory "app/views"
+  end
+
+  def test_app_update_does_not_generate_unnecessary_config_files
+    run_generator
+
+    generator = Rails::Generators::AppGenerator.new ["rails"],
+      { api: true, update: true }, { destination_root: destination_root, shell: @shell }
+    quietly { generator.send(:update_config_files) }
+
+    assert_no_file "config/initializers/cookies_serializer.rb"
+    assert_no_file "config/initializers/assets.rb"
+    assert_no_file "config/initializers/content_security_policy.rb"
+  end
+
+  def test_app_update_does_not_generate_unnecessary_bin_files
+    run_generator
+
+    generator = Rails::Generators::AppGenerator.new ["rails"],
+      { api: true, update: true }, { destination_root: destination_root, shell: @shell }
+    quietly { generator.send(:update_bin_files) }
+
+    assert_no_file "bin/yarn"
+  end
+
+  private
+
+    def default_files
+      %w(.gitignore
+        .ruby-version
+        README.md
+        Gemfile
+        Rakefile
+        config.ru
+        app/channels
+        app/controllers
+        app/mailers
+        app/models
+        app/views/layouts
+        app/views/layouts/mailer.html.erb
+        app/views/layouts/mailer.text.erb
+        bin/rails
+        bin/rake
+        bin/setup
+        bin/update
+        config/application.rb
+        config/boot.rb
+        config/cable.yml
+        config/environment.rb
+        config/environments
+        config/environments/development.rb
+        config/environments/production.rb
+        config/environments/test.rb
+        config/initializers
+        config/initializers/application_controller_renderer.rb
+        config/initializers/backtrace_silencers.rb
+        config/initializers/cors.rb
+        config/initializers/filter_parameter_logging.rb
+        config/initializers/inflections.rb
+        config/initializers/mime_types.rb
+        config/initializers/wrap_parameters.rb
+        config/locales
+        config/locales/en.yml
+        config/puma.rb
+        config/routes.rb
+        config/credentials.yml.enc
+        config/spring.rb
+        config/storage.yml
+        db
+        db/seeds.rb
+        lib
+        lib/tasks
+        log
+        test/fixtures
+        test/controllers
+        test/integration
+        test/models
+        tmp
+        vendor
+      )
+    end
+
+    def skipped_files
+      %w(app/assets
+         app/helpers
+         app/views/layouts/application.html.erb
+         bin/yarn
+         config/initializers/assets.rb
+         config/initializers/cookies_serializer.rb
+         config/initializers/content_security_policy.rb
+         lib/assets
+         test/helpers
+         tmp/cache/assets
+         public/404.html
+         public/422.html
+         public/500.html
+         public/apple-touch-icon-precomposed.png
+         public/apple-touch-icon.png
+         public/favicon.ico
+         package.json
+      )
+    end
+end