Create executable bug report Rails application

This template draws inspiration from Rails' [bug report templates][]. [bug report templates]: https://edgeguides.rubyonrails.org/contributing_to_ruby_on_rails.html#create-an-executable-test-case
hotwired · Mar 15, 2024 · 457a487 · 457a487
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diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
@@ -29,6 +29,9 @@ jobs:
           rubygems: latest
           bundler-cache: true
 
+      - name: Run Bug Template Tests
+        run: ruby bug_report_template.rb || ruby bug_report_template.rb
+
       - name: Run tests
         id: test
         run: bundle exec rake TESTOPT=-vdc

diff --git a/README.md b/README.md
@@ -156,6 +156,14 @@ The [`Turbo::Broadcastable::TestHelper`](./lib/turbo/broadcastable/test_helper.r
 
 Run the tests with `./bin/test`.
 
+## Contributing
+
+Having a way to reproduce your issue will help people confirm, investigate, and ultimately fix your issue. You can do this by providing an executable test case. To make this process easier, we have prepared an [executable bug report Rails application](./bug_report_template.rb) for you to use as a starting point.
+
+This template includes the boilerplate code to set up a System Test case. Copy the content of the template into a `.rb` file and make the necessary changes to demonstrate the issue. You can execute it by running `ruby the_file.rb` in your terminal. If all goes well, you should see your test case failing.
+
+You can then share your executable test case as a gist or paste the content into the issue description.
+
 ## License
 
 Turbo is released under the [MIT License](https://opensource.org/licenses/MIT).
diff --git a/bug_report_template.rb b/bug_report_template.rb
@@ -0,0 +1,114 @@
+require "bundler/inline"
+
+gemfile(true) do
+  source "https://rubygems.org"
+
+  git_source(:github) { |repo| "https://github.com/#{repo}.git" }
+
+  gem "rails"
+  gem "propshaft"
+  gem "puma"
+  gem "sqlite3"
+  gem "turbo-rails"
+
+  gem "capybara"
+  gem "cuprite", "~> 0.9", require: "capybara/cuprite"
+end
+
+ENV["DATABASE_URL"] = "sqlite3::memory:"
+ENV["RAILS_ENV"] = "test"
+
+require "active_record/railtie"
+# require "active_storage/engine"
+require "action_controller/railtie"
+require "action_view/railtie"
+# require "action_mailer/railtie"
+# require "active_job/railtie"
+require "action_cable/engine"
+# require "action_mailbox/engine"
+# require "action_text/engine"
+require "rails/test_unit/railtie"
+
+class App < Rails::Application
+  config.load_defaults Rails::VERSION::STRING.to_f
+
+  config.root = __dir__
+  config.hosts << "example.org"
+  config.eager_load = false
+  config.session_store :cookie_store, key: "cookie_store_key"
+  config.secret_key_base = "secret_key_base"
+  config.consider_all_requests_local = true
+  config.action_cable.cable = {"adapter" => "async"}
+  config.turbo.draw_routes = false
+
+  Rails.logger = config.logger = Logger.new($stdout)
+
+  routes.append do
+    root to: "application#index"
+  end
+end
+
+Rails.application.initialize!
+
+ActiveRecord::Schema.define do
+  create_table :messages, force: true do |t|
+    t.text :body, null: false
+  end
+end
+
+class Message < ActiveRecord::Base
+end
+
+class ApplicationController < ActionController::Base
+  include Rails.application.routes.url_helpers
+
+  class_attribute :template, default: DATA.read
+
+  def index
+    render inline: template, formats: :html
+  end
+end
+
+class ApplicationSystemTestCase < ActionDispatch::SystemTestCase
+  driven_by :cuprite, using: :chrome, screen_size: [1400, 1400], options: { js_errors: true }
+end
+
+Capybara.configure do |config|
+  config.server = :puma, {Silent: true}
+  config.default_normalize_ws = true
+end
+
+require "rails/test_help"
+
+class TurboSystemTest < ApplicationSystemTestCase
+  test "reproduces bug" do
+    visit root_path
+
+    assert_text "Loaded with Turbo"
+  end
+end
+
+__END__
+
+<!DOCTYPE html>
+<html>
+  <head>
+    <%= csrf_meta_tags %>
+
+    <script type="importmap">
+      {
+        "imports": {
+          "@hotwired/turbo-rails": "<%= asset_path("turbo.js") %>"
+        }
+      }
+    </script>
+
+    <script type="module">
+      import "@hotwired/turbo-rails"
+
+      addEventListener("turbo:load", () => document.body.innerHTML = "Loaded with Turbo")
+    </script>
+  </head>
+
+  <body>Loaded without Turbo</body>
+</html>