Assert exact file output for plugins too

In a [previous commit][1], the App Generator skeleton test was updated
to verify the exact file output when generating a new application. This
commit applies the same change to the Plugin Generator.

At first, I was hesitant to add the list of dummy app files to the
`default_files` for the Plugin Generator test, however it quickly became
apparent that it was a good idea. Making this change exposed that recent
file additions to the App Generator were added to the plugin's dummy app
as well. Things like CI files, rubocop configuration, and a brakeman
command should not be created for a dummy app, and are now properly
excluded.

Similar to the App Generator commit, this change also removes tests that
are now redundant due to the skeleton test verifying the exact list of
files generated.

[1]: e5e4b80

railties/lib/rails/generators/rails/plugin/plugin_generator.rb

@@ -112,9 +112,12 @@ def test
     def generate_test_dummy(force = false)
       opts = options.transform_keys(&:to_sym).except(*DUMMY_IGNORE_OPTIONS)
       opts[:force] = force
+      opts[:skip_brakeman] = true
       opts[:skip_bundle] = true
+      opts[:skip_ci] = true
       opts[:skip_git] = true
       opts[:skip_hotwire] = true
+      opts[:skip_rubocop] = true
       opts[:dummy_app] = true
 
       invoke Rails::Generators::AppGenerator,
@@ -144,7 +147,7 @@ def test_dummy_sprocket_assets
     def test_dummy_clean
       inside dummy_path do
         remove_file ".ruby-version"
-        remove_file "db/seeds.rb"
+        remove_dir "db"
         remove_file "Gemfile"
         remove_file "lib/tasks"
         remove_file "public/robots.txt"

railties/test/generators/plugin_generator_test.rb

@@ -7,19 +7,70 @@
 require "rails/engine/updater"
 
 DEFAULT_PLUGIN_FILES = %w(
+  .git
   .gitignore
   Gemfile
-  Rakefile
+  MIT-LICENSE
   README.md
+  Rakefile
+  bin/test
   bukkits.gemspec
-  MIT-LICENSE
-  lib
   lib/bukkits.rb
-  lib/tasks/bukkits_tasks.rake
+  lib/bukkits/railtie.rb
   lib/bukkits/version.rb
+  lib/tasks/bukkits_tasks.rake
   test/bukkits_test.rb
+  test/dummy/Rakefile
+  test/dummy/app/assets/images/.keep
+  test/dummy/app/assets/stylesheets/application.css
+  test/dummy/app/channels/application_cable/channel.rb
+  test/dummy/app/channels/application_cable/connection.rb
+  test/dummy/app/controllers/application_controller.rb
+  test/dummy/app/controllers/concerns/.keep
+  test/dummy/app/helpers/application_helper.rb
+  test/dummy/app/jobs/application_job.rb
+  test/dummy/app/mailers/application_mailer.rb
+  test/dummy/app/models/application_record.rb
+  test/dummy/app/models/concerns/.keep
+  test/dummy/app/views/layouts/application.html.erb
+  test/dummy/app/views/layouts/mailer.html.erb
+  test/dummy/app/views/layouts/mailer.text.erb
+  test/dummy/app/views/pwa/manifest.json.erb
+  test/dummy/app/views/pwa/service-worker.js
+  test/dummy/bin/rails
+  test/dummy/bin/rake
+  test/dummy/bin/setup
+  test/dummy/config.ru
+  test/dummy/config/application.rb
+  test/dummy/config/boot.rb
+  test/dummy/config/cable.yml
+  test/dummy/config/database.yml
+  test/dummy/config/environment.rb
+  test/dummy/config/environments/development.rb
+  test/dummy/config/environments/production.rb
+  test/dummy/config/environments/test.rb
+  test/dummy/config/initializers/content_security_policy.rb
+  test/dummy/config/initializers/enable_yjit.rb
+  test/dummy/config/initializers/filter_parameter_logging.rb
+  test/dummy/config/initializers/inflections.rb
+  test/dummy/config/initializers/permissions_policy.rb
+  test/dummy/config/locales/en.yml
+  test/dummy/config/puma.rb
+  test/dummy/config/routes.rb
+  test/dummy/config/storage.yml
+  test/dummy/lib/assets/.keep
+  test/dummy/log/.keep
+  test/dummy/public/404.html
+  test/dummy/public/422.html
+  test/dummy/public/426.html
+  test/dummy/public/500.html
+  test/dummy/public/icon.png
+  test/dummy/public/icon.svg
+  test/dummy/storage/.keep
+  test/dummy/tmp/.keep
+  test/dummy/tmp/pids/.keep
+  test/dummy/tmp/storage/.keep
   test/test_helper.rb
-  test/dummy
 )
 
 class PluginGeneratorTest < Rails::Generators::TestCase
@@ -68,8 +119,6 @@ def test_correct_file_in_lib_folder_of_camelcase_plugin_name
   def test_generating_without_options
     run_generator
     assert_file "README.md", /Bukkits/
-    assert_no_file "config/routes.rb"
-    assert_no_file "app/assets/config/bukkits_manifest.js"
     assert_file "test/test_helper.rb" do |content|
       assert_match(/require_relative.+test\/dummy\/config\/environment/, content)
       assert_match(/ActiveRecord::Migrator\.migrations_paths.+test\/dummy\/db\/migrate/, content)
@@ -83,13 +132,6 @@ def test_generating_without_options
       assert_match(/class BukkitsTest < ActiveSupport::TestCase/, content)
       assert_match(/assert Bukkits::VERSION/, content)
     end
-    assert_file "bin/test"
-    assert_no_file "bin/rails"
-  end
-
-  def test_initializes_git_repo
-    run_generator
-    assert_directory ".git"
   end
 
   def test_initializes_git_repo_with_main_branch_without_user_default
@@ -176,12 +218,6 @@ def test_generating_adds_dummy_app_rake_tasks_without_unit_test_files
     assert_file "bin/rails", /APP_PATH/
   end
 
-  def test_generating_adds_dummy_app_without_javascript_and_assets_deps
-    run_generator
-
-    assert_file "test/dummy/app/assets/stylesheets/application.css"
-  end
-
   def test_ensure_that_plugin_options_are_not_passed_to_app_generator
     FileUtils.cd(fixtures_root)
     assert_no_match(/It works from file!.*It works_from_file/, run_generator([destination_root, "-m", "lib/template.rb"]))
@@ -608,24 +644,6 @@ def test_ensure_that_gitignore_can_be_generated_from_a_template_for_dummy_path
     end
   end
 
-  def test_unnecessary_files_are_not_generated_in_dummy_application
-    run_generator
-    assert_no_file "test/dummy/.gitignore"
-    assert_no_file "test/dummy/.ruby-version"
-    assert_no_file "test/dummy/db/seeds.rb"
-    assert_no_file "test/dummy/Gemfile"
-    assert_no_file "test/dummy/public/robots.txt"
-    assert_no_file "test/dummy/README.md"
-    assert_no_file "test/dummy/config/master.key"
-    assert_no_file "test/dummy/config/credentials.yml.enc"
-    assert_no_file "test/dummy/Dockerfile"
-    assert_no_file "test/dummy/.dockerignore"
-    assert_no_directory "test/dummy/lib/tasks"
-    assert_no_directory "test/dummy/test"
-    assert_no_directory "test/dummy/vendor"
-    assert_no_directory "test/dummy/.git"
-  end
-
   def test_skipping_test_files
     run_generator [destination_root, "--skip-test"]
     assert_no_directory "test"