Add --skip-active-storage and do so automatically when --skip-active-record is used

Closes #30102

Revert part 787fe90dc0a7c5b91bb5af51f2858ea8c4676268

--skip-active-storage pass throughs `rails plugin new`

Add changelog entry about default initialization of Active Storage

20 files changed, 270 insertions, 65 deletions

diff --git a/railties/CHANGELOG.md b/railties/CHANGELOG.md
index 20603dedaf..e69a1231b1 100644
--- a/railties/CHANGELOG.md
+++ b/railties/CHANGELOG.md
@@ -1,3 +1,9 @@
+*   `rails new` and `rails plugin new` get `Active Storage` by default.
+     Add ability to skip `Active Storage` with `--skip-active-storage`
+     and do so automatically when `--skip-active-record` is used.
+
+    *bogdanvlviv*
+
 *   Gemfile for new apps: upgrade redis-rb from ~> 3.0 to 4.0.
 
     *Jeremy Daer*
diff --git a/railties/lib/rails/all.rb b/railties/lib/rails/all.rb
index e55b2e2433..f5dccd2381 100644
--- a/railties/lib/rails/all.rb
+++ b/railties/lib/rails/all.rb
@@ -4,12 +4,12 @@ require "rails"
 
 %w(
   active_record/railtie
+  active_storage/engine
   action_controller/railtie
   action_view/railtie
   action_mailer/railtie
   active_job/railtie
   action_cable/engine
-  active_storage/engine
   rails/test_unit/railtie
   sprockets/railtie
 ).each do |railtie|
diff --git a/railties/lib/rails/app_updater.rb b/railties/lib/rails/app_updater.rb
index c2436a69f9..a076d082d5 100644
--- a/railties/lib/rails/app_updater.rb
+++ b/railties/lib/rails/app_updater.rb
@@ -21,11 +21,12 @@ module Rails
       private
         def generator_options
           options = { api: !!Rails.application.config.api_only, update: true }
-          options[:skip_active_record] = !defined?(ActiveRecord::Railtie)
-          options[:skip_action_mailer] = !defined?(ActionMailer::Railtie)
-          options[:skip_action_cable]  = !defined?(ActionCable::Engine)
-          options[:skip_sprockets]     = !defined?(Sprockets::Railtie)
-          options[:skip_puma]          = !defined?(Puma)
+          options[:skip_active_record]  = !defined?(ActiveRecord::Railtie)
+          options[:skip_active_storage] = !defined?(ActiveStorage::Engine) || !defined?(ActiveRecord::Railtie)
+          options[:skip_action_mailer]  = !defined?(ActionMailer::Railtie)
+          options[:skip_action_cable]   = !defined?(ActionCable::Engine)
+          options[:skip_sprockets]      = !defined?(Sprockets::Railtie)
+          options[:skip_puma]           = !defined?(Puma)
           options
         end
     end
diff --git a/railties/lib/rails/generators/app_base.rb b/railties/lib/rails/generators/app_base.rb
index bc00adabae..2809c433f6 100644
--- a/railties/lib/rails/generators/app_base.rb
+++ b/railties/lib/rails/generators/app_base.rb
@@ -26,75 +26,78 @@ module Rails
       end
 
       def self.add_shared_options_for(name)
-        class_option :template,           type: :string, aliases: "-m",
-                                          desc: "Path to some #{name} template (can be a filesystem path or URL)"
+        class_option :template,            type: :string, aliases: "-m",
+                                           desc: "Path to some #{name} template (can be a filesystem path or URL)"
 
-        class_option :database,           type: :string, aliases: "-d", default: "sqlite3",
-                                          desc: "Preconfigure for selected database (options: #{DATABASES.join('/')})"
+        class_option :database,            type: :string, aliases: "-d", default: "sqlite3",
+                                           desc: "Preconfigure for selected database (options: #{DATABASES.join('/')})"
 
-        class_option :skip_yarn,          type: :boolean, default: false,
-                                          desc: "Don't use Yarn for managing JavaScript dependencies"
+        class_option :skip_yarn,           type: :boolean, default: false,
+                                           desc: "Don't use Yarn for managing JavaScript dependencies"
 
-        class_option :skip_gemfile,       type: :boolean, default: false,
-                                          desc: "Don't create a Gemfile"
+        class_option :skip_gemfile,        type: :boolean, default: false,
+                                           desc: "Don't create a Gemfile"
 
-        class_option :skip_git,           type: :boolean, aliases: "-G", default: false,
-                                          desc: "Skip .gitignore file"
+        class_option :skip_git,            type: :boolean, aliases: "-G", default: false,
+                                           desc: "Skip .gitignore file"
 
-        class_option :skip_keeps,         type: :boolean, default: false,
-                                          desc: "Skip source control .keep files"
+        class_option :skip_keeps,          type: :boolean, default: false,
+                                           desc: "Skip source control .keep files"
 
-        class_option :skip_action_mailer, type: :boolean, aliases: "-M",
-                                          default: false,
-                                          desc: "Skip Action Mailer files"
+        class_option :skip_action_mailer,  type: :boolean, aliases: "-M",
+                                           default: false,
+                                           desc: "Skip Action Mailer files"
 
-        class_option :skip_active_record, type: :boolean, aliases: "-O", default: false,
-                                          desc: "Skip Active Record files"
+        class_option :skip_active_record,  type: :boolean, aliases: "-O", default: false,
+                                           desc: "Skip Active Record files"
 
-        class_option :skip_puma,          type: :boolean, aliases: "-P", default: false,
-                                          desc: "Skip Puma related files"
+        class_option :skip_active_storage, type: :boolean, default: false,
+                                           desc: "Skip Active Storage files"
 
-        class_option :skip_action_cable,  type: :boolean, aliases: "-C", default: false,
-                                          desc: "Skip Action Cable files"
+        class_option :skip_puma,           type: :boolean, aliases: "-P", default: false,
+                                           desc: "Skip Puma related files"
 
-        class_option :skip_sprockets,     type: :boolean, aliases: "-S", default: false,
-                                          desc: "Skip Sprockets files"
+        class_option :skip_action_cable,   type: :boolean, aliases: "-C", default: false,
+                                           desc: "Skip Action Cable files"
 
-        class_option :skip_spring,        type: :boolean, default: false,
-                                          desc: "Don't install Spring application preloader"
+        class_option :skip_sprockets,      type: :boolean, aliases: "-S", default: false,
+                                           desc: "Skip Sprockets files"
 
-        class_option :skip_listen,        type: :boolean, default: false,
-                                          desc: "Don't generate configuration that depends on the listen gem"
+        class_option :skip_spring,         type: :boolean, default: false,
+                                           desc: "Don't install Spring application preloader"
 
-        class_option :skip_coffee,        type: :boolean, default: false,
-                                          desc: "Don't use CoffeeScript"
+        class_option :skip_listen,         type: :boolean, default: false,
+                                           desc: "Don't generate configuration that depends on the listen gem"
 
-        class_option :skip_javascript,    type: :boolean, aliases: "-J", default: false,
-                                          desc: "Skip JavaScript files"
+        class_option :skip_coffee,         type: :boolean, default: false,
+                                           desc: "Don't use CoffeeScript"
 
-        class_option :skip_turbolinks,    type: :boolean, default: false,
-                                          desc: "Skip turbolinks gem"
+        class_option :skip_javascript,     type: :boolean, aliases: "-J", default: false,
+                                           desc: "Skip JavaScript files"
 
-        class_option :skip_test,          type: :boolean, aliases: "-T", default: false,
-                                          desc: "Skip test files"
+        class_option :skip_turbolinks,     type: :boolean, default: false,
+                                           desc: "Skip turbolinks gem"
 
-        class_option :skip_system_test,   type: :boolean, default: false,
-                                          desc: "Skip system test files"
+        class_option :skip_test,           type: :boolean, aliases: "-T", default: false,
+                                           desc: "Skip test files"
 
-        class_option :dev,                type: :boolean, default: false,
-                                          desc: "Setup the #{name} with Gemfile pointing to your Rails checkout"
+        class_option :skip_system_test,    type: :boolean, default: false,
+                                           desc: "Skip system test files"
 
-        class_option :edge,               type: :boolean, default: false,
-                                          desc: "Setup the #{name} with Gemfile pointing to Rails repository"
+        class_option :dev,                 type: :boolean, default: false,
+                                           desc: "Setup the #{name} with Gemfile pointing to your Rails checkout"
 
-        class_option :rc,                 type: :string, default: nil,
-                                          desc: "Path to file containing extra configuration options for rails command"
+        class_option :edge,                type: :boolean, default: false,
+                                           desc: "Setup the #{name} with Gemfile pointing to Rails repository"
 
-        class_option :no_rc,              type: :boolean, default: false,
-                                          desc: "Skip loading of extra configuration options from .railsrc file"
+        class_option :rc,                  type: :string, default: nil,
+                                           desc: "Path to file containing extra configuration options for rails command"
 
-        class_option :help,               type: :boolean, aliases: "-h", group: :rails,
-                                          desc: "Show this help message and quit"
+        class_option :no_rc,               type: :boolean, default: false,
+                                           desc: "Skip loading of extra configuration options from .railsrc file"
+
+        class_option :help,                type: :boolean, aliases: "-h", group: :rails,
+                                           desc: "Show this help message and quit"
       end
 
       def initialize(*args)
@@ -193,11 +196,29 @@ module Rails
       end
 
       def include_all_railties? # :doc:
-        options.values_at(:skip_active_record, :skip_action_mailer, :skip_test, :skip_sprockets, :skip_action_cable).none?
+        [
+          options.values_at(
+            :skip_active_record,
+            :skip_action_mailer,
+            :skip_test,
+            :skip_sprockets,
+            :skip_action_cable
+          ),
+          skip_active_storage?
+        ].flatten.none?
       end
 
       def comment_if(value) # :doc:
-        options[value] ? "# " : ""
+        question = "#{value}?"
+
+        comment =
+          if respond_to?(question, true)
+            send(question)
+          else
+            options[value]
+          end
+
+        comment ? "# " : ""
       end
 
       def keeps? # :doc:
@@ -208,6 +229,10 @@ module Rails
         !options[:skip_active_record] && options[:database] == "sqlite3"
       end
 
+      def skip_active_storage? # :doc:
+        options[:skip_active_storage] || options[:skip_active_record]
+      end
+
       class GemfileEntry < Struct.new(:name, :version, :comment, :options, :commented_out)
         def initialize(name, version, comment, options = {}, commented_out = false)
           super
diff --git a/railties/lib/rails/generators/rails/app/app_generator.rb b/railties/lib/rails/generators/rails/app/app_generator.rb
index 46954f64b5..15c5b973ca 100644
--- a/railties/lib/rails/generators/rails/app/app_generator.rb
+++ b/railties/lib/rails/generators/rails/app/app_generator.rb
@@ -114,7 +114,7 @@ module Rails
         template "cable.yml" unless options[:skip_action_cable]
         template "puma.rb"   unless options[:skip_puma]
         template "spring.rb" if spring_install?
-        template "storage.yml"
+        template "storage.yml" unless skip_active_storage?
 
         directory "environments"
         directory "initializers"
@@ -139,7 +139,7 @@ module Rails
         template "config/cable.yml"
       end
 
-      if !active_storage_config_exist
+      if !skip_active_storage? && !active_storage_config_exist
         template "config/storage.yml"
       end
 
@@ -355,6 +355,10 @@ module Rails
         build(:system_test) if depends_on_system_test?
       end
 
+      def create_storage_files
+        build(:storage) unless skip_active_storage?
+      end
+
       def create_tmp_files
         build(:tmp)
       end
diff --git a/railties/lib/rails/generators/rails/app/templates/Gemfile b/railties/lib/rails/generators/rails/app/templates/Gemfile
index 95e8be96b6..ee9db83ca2 100644
--- a/railties/lib/rails/generators/rails/app/templates/Gemfile
+++ b/railties/lib/rails/generators/rails/app/templates/Gemfile
@@ -20,9 +20,10 @@ ruby <%= "'#{RUBY_VERSION}'" -%>
 
 # Use ActiveModel has_secure_password
 # gem 'bcrypt', '~> 3.1.7'
-
+<% unless skip_active_storage? -%>
 # Use ActiveStorage variant
 # gem 'mini_magick', '~> 4.8'
+<% end -%>
 
 # Use Capistrano for deployment
 # gem 'capistrano-rails', group: :development
diff --git a/railties/lib/rails/generators/rails/app/templates/app/assets/javascripts/application.js.tt b/railties/lib/rails/generators/rails/app/templates/app/assets/javascripts/application.js.tt
index 62fd04f113..5183bcd256 100644
--- a/railties/lib/rails/generators/rails/app/templates/app/assets/javascripts/application.js.tt
+++ b/railties/lib/rails/generators/rails/app/templates/app/assets/javascripts/application.js.tt
@@ -12,7 +12,9 @@
 //
 <% unless options[:skip_javascript] -%>
 //= require rails-ujs
+<% unless skip_active_storage? -%>
 //= require activestorage
+<% end -%>
 <% unless options[:skip_turbolinks] -%>
 //= require turbolinks
 <% end -%>
diff --git a/railties/lib/rails/generators/rails/app/templates/config/application.rb b/railties/lib/rails/generators/rails/app/templates/config/application.rb
index dde09edb94..9e03e86771 100644
--- a/railties/lib/rails/generators/rails/app/templates/config/application.rb
+++ b/railties/lib/rails/generators/rails/app/templates/config/application.rb
@@ -8,10 +8,10 @@ require "rails"
 require "active_model/railtie"
 require "active_job/railtie"
 <%= comment_if :skip_active_record %>require "active_record/railtie"
+<%= comment_if :skip_active_storage %>require "active_storage/engine"
 require "action_controller/railtie"
 <%= comment_if :skip_action_mailer %>require "action_mailer/railtie"
 require "action_view/railtie"
-require "active_storage/engine"
 <%= comment_if :skip_action_cable %>require "action_cable/engine"
 <%= comment_if :skip_sprockets %>require "sprockets/railtie"
 <%= comment_if :skip_test %>require "rails/test_unit/railtie"
diff --git a/railties/lib/rails/generators/rails/app/templates/config/environments/development.rb.tt b/railties/lib/rails/generators/rails/app/templates/config/environments/development.rb.tt
index 98689cc30d..2746aedd6f 100644
--- a/railties/lib/rails/generators/rails/app/templates/config/environments/development.rb.tt
+++ b/railties/lib/rails/generators/rails/app/templates/config/environments/development.rb.tt
@@ -27,8 +27,10 @@ Rails.application.configure do
     config.cache_store = :null_store
   end
 
+  <%- unless skip_active_storage? -%>
   # Store uploaded files on the local file system (see config/storage.yml for options)
   config.active_storage.service = :local
+  <%- end -%>
   <%- unless options.skip_action_mailer? -%>
 
   # Don't care if the mailer can't send.
diff --git a/railties/lib/rails/generators/rails/app/templates/config/environments/production.rb.tt b/railties/lib/rails/generators/rails/app/templates/config/environments/production.rb.tt
index 2e0b555f6f..4c0f36db98 100644
--- a/railties/lib/rails/generators/rails/app/templates/config/environments/production.rb.tt
+++ b/railties/lib/rails/generators/rails/app/templates/config/environments/production.rb.tt
@@ -44,9 +44,11 @@ Rails.application.configure do
   # config.action_dispatch.x_sendfile_header = 'X-Sendfile' # for Apache
   # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for NGINX
 
+  <%- unless skip_active_storage? -%>
   # Store uploaded files on the local file system (see config/storage.yml for options)
   config.active_storage.service = :local
 
+  <%- end -%>
   <%- unless options[:skip_action_cable] -%>
   # Mount Action Cable outside main process or domain
   # config.action_cable.mount_path = nil
diff --git a/railties/lib/rails/generators/rails/app/templates/config/environments/test.rb.tt b/railties/lib/rails/generators/rails/app/templates/config/environments/test.rb.tt
index a53978bc6e..a19f490d91 100644
--- a/railties/lib/rails/generators/rails/app/templates/config/environments/test.rb.tt
+++ b/railties/lib/rails/generators/rails/app/templates/config/environments/test.rb.tt
@@ -28,8 +28,11 @@ Rails.application.configure do
   # Disable request forgery protection in test environment.
   config.action_controller.allow_forgery_protection = false
 
+  <%- unless skip_active_storage? -%>
   # Store uploaded files on the local file system in a temporary directory
   config.active_storage.service = :test
+
+  <%- end -%>
   <%- unless options.skip_action_mailer? -%>
   config.action_mailer.perform_caching = false
 
diff --git a/railties/lib/rails/generators/rails/app/templates/gitignore b/railties/lib/rails/generators/rails/app/templates/gitignore
index 83a7b211aa..bd6b34346a 100644
--- a/railties/lib/rails/generators/rails/app/templates/gitignore
+++ b/railties/lib/rails/generators/rails/app/templates/gitignore
@@ -21,8 +21,10 @@
 !/tmp/.keep
 <% end -%>
 
+<% unless skip_active_storage? -%>
 # Ignore uploaded files in development
 /storage/*
+<% end -%>
 
 <% unless options.skip_yarn? -%>
 /node_modules
diff --git a/railties/lib/rails/generators/rails/plugin/plugin_generator.rb b/railties/lib/rails/generators/rails/plugin/plugin_generator.rb
index d9ca4712d0..bc2dcf008e 100644
--- a/railties/lib/rails/generators/rails/plugin/plugin_generator.rb
+++ b/railties/lib/rails/generators/rails/plugin/plugin_generator.rb
@@ -87,7 +87,7 @@ task default: :test
     end
 
     PASSTHROUGH_OPTIONS = [
-      :skip_active_record, :skip_action_mailer, :skip_javascript, :skip_action_cable, :skip_sprockets, :database,
+      :skip_active_record, :skip_active_storage, :skip_action_mailer, :skip_javascript, :skip_action_cable, :skip_sprockets, :database,
       :javascript, :skip_yarn, :api, :quiet, :pretend, :skip
     ]
 
diff --git a/railties/lib/rails/generators/rails/plugin/templates/gitignore b/railties/lib/rails/generators/rails/plugin/templates/gitignore
index e15863d860..7a68da5c4b 100644
--- a/railties/lib/rails/generators/rails/plugin/templates/gitignore
+++ b/railties/lib/rails/generators/rails/plugin/templates/gitignore
@@ -11,5 +11,8 @@ pkg/
 <%= dummy_path %>/node_modules/
 <%= dummy_path %>/yarn-error.log
 <% end -%>
+<% unless skip_active_storage? -%>
+<%= dummy_path %>/storage/
+<% end -%>
 <%= dummy_path %>/tmp/
 <% end -%>
diff --git a/railties/lib/rails/generators/rails/plugin/templates/rails/application.rb b/railties/lib/rails/generators/rails/plugin/templates/rails/application.rb
index 47b56ae3df..06ffe2f1ed 100644
--- a/railties/lib/rails/generators/rails/plugin/templates/rails/application.rb
+++ b/railties/lib/rails/generators/rails/plugin/templates/rails/application.rb
@@ -8,10 +8,10 @@ require "rails"
 require "active_model/railtie"
 require "active_job/railtie"
 <%= comment_if :skip_active_record %>require "active_record/railtie"
+<%= comment_if :skip_active_storage %>require "active_storage/engine"
 require "action_controller/railtie"
 <%= comment_if :skip_action_mailer %>require "action_mailer/railtie"
 require "action_view/railtie"
-require "active_storage/engine"
 <%= comment_if :skip_action_cable %>require "action_cable/engine"
 <%= comment_if :skip_sprockets %>require "sprockets/railtie"
 <%= comment_if :skip_test %>require "rails/test_unit/railtie"
diff --git a/railties/lib/rails/generators/rails/plugin/templates/rails/javascripts.js b/railties/lib/rails/generators/rails/plugin/templates/rails/javascripts.js
index e54c6461cc..f3d80c87f5 100644
--- a/railties/lib/rails/generators/rails/plugin/templates/rails/javascripts.js
+++ b/railties/lib/rails/generators/rails/plugin/templates/rails/javascripts.js
@@ -10,4 +10,7 @@
 // Read Sprockets README (https://github.com/rails/sprockets#sprockets-directives) for details
 // about supported directives.
 //
+<% unless skip_active_storage? -%>
+//= require activestorage
+<% end -%>
 //= require_tree .
diff --git a/railties/test/generators/app_generator_test.rb b/railties/test/generators/app_generator_test.rb
index 160ad1a928..0e2988952b 100644
--- a/railties/test/generators/app_generator_test.rb
+++ b/railties/test/generators/app_generator_test.rb
@@ -75,6 +75,7 @@ DEFAULT_APP_FILES = %w(
   log
   package.json
   public
+  storage
   test/application_system_test_case.rb
   test/test_helper.rb
   test/fixtures
@@ -89,6 +90,7 @@ DEFAULT_APP_FILES = %w(
   tmp
   tmp/cache
   tmp/cache/assets
+  tmp/storage
 )
 
 class AppGeneratorTest < Rails::Generators::TestCase
@@ -296,6 +298,65 @@ class AppGeneratorTest < Rails::Generators::TestCase
     end
   end
 
+  def test_active_storage_mini_magick_gem
+    run_generator
+    assert_file "Gemfile", /^# gem 'mini_magick'/
+  end
+
+  def test_app_update_does_not_generate_active_storage_contents_when_skip_active_storage_is_given
+    app_root = File.join(destination_root, "myapp")
+    run_generator [app_root, "--skip-active-storage"]
+
+    FileUtils.cd(app_root) do
+      quietly { system("bin/rails app:update") }
+    end
+
+    assert_file "#{app_root}/config/environments/development.rb" do |content|
+      assert_no_match(/config\.active_storage/, content)
+    end
+
+    assert_file "#{app_root}/config/environments/production.rb" do |content|
+      assert_no_match(/config\.active_storage/, content)
+    end
+
+    assert_file "#{app_root}/config/environments/test.rb" do |content|
+      assert_no_match(/config\.active_storage/, content)
+    end
+
+    assert_no_file "#{app_root}/config/storage.yml"
+
+    assert_file "#{app_root}/Gemfile" do |content|
+      assert_no_match(/gem 'mini_magick'/, content)
+    end
+  end
+
+  def test_app_update_does_not_generate_active_storage_contents_when_skip_active_record_is_given
+    app_root = File.join(destination_root, "myapp")
+    run_generator [app_root, "--skip-active-record"]
+
+    FileUtils.cd(app_root) do
+      quietly { system("bin/rails app:update") }
+    end
+
+    assert_file "#{app_root}/config/environments/development.rb" do |content|
+      assert_no_match(/config\.active_storage/, content)
+    end
+
+    assert_file "#{app_root}/config/environments/production.rb" do |content|
+      assert_no_match(/config\.active_storage/, content)
+    end
+
+    assert_file "#{app_root}/config/environments/test.rb" do |content|
+      assert_no_match(/config\.active_storage/, content)
+    end
+
+    assert_no_file "#{app_root}/config/storage.yml"
+
+    assert_file "#{app_root}/Gemfile" do |content|
+      assert_no_match(/gem 'mini_magick'/, content)
+    end
+  end
+
   def test_application_names_are_not_singularized
     run_generator [File.join(destination_root, "hats")]
     assert_file "hats/config/environment.rb", /Rails\.application\.initialize!/
diff --git a/railties/test/generators/plugin_generator_test.rb b/railties/test/generators/plugin_generator_test.rb
index 38130ceb68..06d223e26d 100644
--- a/railties/test/generators/plugin_generator_test.rb
+++ b/railties/test/generators/plugin_generator_test.rb
@@ -230,7 +230,7 @@ class PluginGeneratorTest < Rails::Generators::TestCase
   end
 
   def test_ensure_that_tests_work
-    run_generator
+    run_generator [destination_root, "--skip-active-storage"]
     FileUtils.cd destination_root
     quietly { system "bundle install" }
     assert_match(/1 runs, 1 assertions, 0 failures, 0 errors/, `bin/test 2>&1`)
@@ -240,8 +240,7 @@ class PluginGeneratorTest < Rails::Generators::TestCase
     run_generator [destination_root, "--full", "--skip_active_record"]
     FileUtils.cd destination_root
     quietly { system "bundle install" }
-    # FIXME: Active Storage will provoke a test error without ActiveRecord (fix by allowing to skip active storage)
-    assert_match(/1 runs, 0 assertions, 0 failures, 1 errors/, `bundle exec rake test 2>&1`)
+    assert_match(/1 runs, 1 assertions, 0 failures, 0 errors/, `bundle exec rake test 2>&1`)
   end
 
   def test_ensure_that_migration_tasks_work_with_mountable_option
diff --git a/railties/test/generators/plugin_test_runner_test.rb b/railties/test/generators/plugin_test_runner_test.rb
index 89c3f1e496..48a3bcadcd 100644
--- a/railties/test/generators/plugin_test_runner_test.rb
+++ b/railties/test/generators/plugin_test_runner_test.rb
@@ -7,7 +7,7 @@ class PluginTestRunnerTest < ActiveSupport::TestCase
 
   def setup
     @destination_root = Dir.mktmpdir("bukkits")
-    Dir.chdir(@destination_root) { `bundle exec rails plugin new bukkits --skip-bundle` }
+    Dir.chdir(@destination_root) { `bundle exec rails plugin new bukkits --skip-bundle --skip-active-storage` }
     plugin_file "test/dummy/db/schema.rb", ""
   end
 
diff --git a/railties/test/generators/shared_generator_tests.rb b/railties/test/generators/shared_generator_tests.rb
index 654d16de65..cd86dd662f 100644
--- a/railties/test/generators/shared_generator_tests.rb
+++ b/railties/test/generators/shared_generator_tests.rb
@@ -189,6 +189,97 @@ module SharedGeneratorTests
     end
   end
 
+  def test_generator_for_active_storage
+    run_generator
+
+    assert_file "#{application_path}/app/assets/javascripts/application.js" do |content|
+      assert_match(/^\/\/= require activestorage/, content)
+    end
+
+    assert_file "#{application_path}/config/environments/development.rb" do |content|
+      assert_match(/config\.active_storage/, content)
+    end
+
+    assert_file "#{application_path}/config/environments/production.rb" do |content|
+      assert_match(/config\.active_storage/, content)
+    end
+
+    assert_file "#{application_path}/config/environments/test.rb" do |content|
+      assert_match(/config\.active_storage/, content)
+    end
+
+    assert_file "#{application_path}/config/storage.yml"
+    assert_directory "#{application_path}/db/migrate"
+    assert_directory "#{application_path}/storage"
+    assert_directory "#{application_path}/tmp/storage"
+
+    assert_file ".gitignore" do |content|
+      assert_match(/\/storage\//, content)
+    end
+  end
+
+  def test_generator_if_skip_active_storage_is_given
+    run_generator [destination_root, "--skip-active-storage"]
+
+    assert_file "#{application_path}/config/application.rb", /#\s+require\s+["']active_storage\/engine["']/
+
+    assert_file "#{application_path}/app/assets/javascripts/application.js" do |content|
+      assert_no_match(/^\/\/= require activestorage/, content)
+    end
+
+    assert_file "#{application_path}/config/environments/development.rb" do |content|
+      assert_no_match(/config\.active_storage/, content)
+    end
+
+    assert_file "#{application_path}/config/environments/production.rb" do |content|
+      assert_no_match(/config\.active_storage/, content)
+    end
+
+    assert_file "#{application_path}/config/environments/test.rb" do |content|
+      assert_no_match(/config\.active_storage/, content)
+    end
+
+    assert_no_file "#{application_path}/config/storage.yml"
+    assert_no_directory "#{application_path}/db/migrate"
+    assert_no_directory "#{application_path}/storage"
+    assert_no_directory "#{application_path}/tmp/storage"
+
+    assert_file ".gitignore" do |content|
+      assert_no_match(/\/storage\//, content)
+    end
+  end
+
+  def test_generator_does_not_generate_active_storage_contents_if_skip_active_record_is_given
+    run_generator [destination_root, "--skip-active-record"]
+
+    assert_file "#{application_path}/config/application.rb", /#\s+require\s+["']active_storage\/engine["']/
+
+    assert_file "#{application_path}/app/assets/javascripts/application.js" do |content|
+      assert_no_match(/^\/\/= require activestorage/, content)
+    end
+
+    assert_file "#{application_path}/config/environments/development.rb" do |content|
+      assert_no_match(/config\.active_storage/, content)
+    end
+
+    assert_file "#{application_path}/config/environments/production.rb" do |content|
+      assert_no_match(/config\.active_storage/, content)
+    end
+
+    assert_file "#{application_path}/config/environments/test.rb" do |content|
+      assert_no_match(/config\.active_storage/, content)
+    end
+
+    assert_no_file "#{application_path}/config/storage.yml"
+    assert_no_directory "#{application_path}/db/migrate"
+    assert_no_directory "#{application_path}/storage"
+    assert_no_directory "#{application_path}/tmp/storage"
+
+    assert_file ".gitignore" do |content|
+      assert_no_match(/\/storage\//, content)
+    end
+  end
+
   def test_generator_if_skip_action_mailer_is_given
     run_generator [destination_root, "--skip-action-mailer"]
     assert_file "#{application_path}/config/application.rb", /#\s+require\s+["']action_mailer\/railtie["']/