diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..2c4a53c
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,40 @@
+name: CI
+on: [push, pull_request]
+jobs:
+  tests:
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby-version:
+          - "3.1"
+          - "3.2"
+          - "3.3"
+        gemfile:
+          - gemfiles/rails_7_0.gemfile
+          - gemfiles/rails_7_1.gemfile
+          - gemfiles/rails_main.gemfile
+        continue-on-error: [ false ]
+
+    name: ${{ format('Tests (Ruby {0}, {1})', matrix.ruby-version, matrix.gemfile) }}
+    runs-on: ubuntu-latest
+    continue-on-error: ${{ matrix.continue-on-error }}
+
+    env:
+      BUNDLE_GEMFILE: ${{ matrix.gemfile }}
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Remove Gemfile lock
+        run: |
+          rm -f $BUNDLE_GEMFILE.lock
+
+      - name: Install Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby-version }}
+          bundler-cache: true
+
+      - name: Run tests
+        run: |
+          bundle exec rake
diff --git a/.gitignore b/.gitignore
index 7e1052c..34600ef 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,6 @@
+/tmp/
 .byebug_history
 *.gem
+
+# Ignore Gemfile.lock files for Rails main branch.
+/gemfiles/rails_main*.gemfile.lock
diff --git a/Appraisals b/Appraisals
new file mode 100644
index 0000000..d6e6ee8
--- /dev/null
+++ b/Appraisals
@@ -0,0 +1,14 @@
+appraise "rails_7_0" do
+  gem "rails", "~> 7.0.0"
+  gem "propshaft"
+end
+
+appraise "rails_7_1" do
+  gem "rails", "~> 7.1.0"
+  gem "propshaft"
+end
+
+appraise "rails_main" do
+  gem "rails", github: "rails/rails", branch: "main"
+  gem "propshaft"
+end
diff --git a/Gemfile b/Gemfile
index 1487b97..4f13599 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,9 +4,9 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 # Specify your gem's dependencies in importmap-rails.gemspec.
 gemspec
 
-rails_version = ENV["RAILS_VERSION"] || "6.1.0"
-gem "rails", "~> #{rails_version}"
-
+gem "appraisal"
+gem "rails", "~> 6.0.0"
+gem "sprockets-rails"
 gem "sqlite3"
 
 group :test do
diff --git a/Gemfile.lock b/Gemfile.lock
index 86ed94f..6da3cae 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,162 +7,191 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    actioncable (6.1.3.1)
-      actionpack (= 6.1.3.1)
-      activesupport (= 6.1.3.1)
+    actioncable (6.0.6.1)
+      actionpack (= 6.0.6.1)
       nio4r (~> 2.0)
       websocket-driver (>= 0.6.1)
-    actionmailbox (6.1.3.1)
-      actionpack (= 6.1.3.1)
-      activejob (= 6.1.3.1)
-      activerecord (= 6.1.3.1)
-      activestorage (= 6.1.3.1)
-      activesupport (= 6.1.3.1)
+    actionmailbox (6.0.6.1)
+      actionpack (= 6.0.6.1)
+      activejob (= 6.0.6.1)
+      activerecord (= 6.0.6.1)
+      activestorage (= 6.0.6.1)
+      activesupport (= 6.0.6.1)
       mail (>= 2.7.1)
-    actionmailer (6.1.3.1)
-      actionpack (= 6.1.3.1)
-      actionview (= 6.1.3.1)
-      activejob (= 6.1.3.1)
-      activesupport (= 6.1.3.1)
+    actionmailer (6.0.6.1)
+      actionpack (= 6.0.6.1)
+      actionview (= 6.0.6.1)
+      activejob (= 6.0.6.1)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 2.0)
-    actionpack (6.1.3.1)
-      actionview (= 6.1.3.1)
-      activesupport (= 6.1.3.1)
-      rack (~> 2.0, >= 2.0.9)
+    actionpack (6.0.6.1)
+      actionview (= 6.0.6.1)
+      activesupport (= 6.0.6.1)
+      rack (~> 2.0, >= 2.0.8)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.2.0)
-    actiontext (6.1.3.1)
-      actionpack (= 6.1.3.1)
-      activerecord (= 6.1.3.1)
-      activestorage (= 6.1.3.1)
-      activesupport (= 6.1.3.1)
+    actiontext (6.0.6.1)
+      actionpack (= 6.0.6.1)
+      activerecord (= 6.0.6.1)
+      activestorage (= 6.0.6.1)
+      activesupport (= 6.0.6.1)
       nokogiri (>= 1.8.5)
-    actionview (6.1.3.1)
-      activesupport (= 6.1.3.1)
+    actionview (6.0.6.1)
+      activesupport (= 6.0.6.1)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.1, >= 1.2.0)
-    activejob (6.1.3.1)
-      activesupport (= 6.1.3.1)
+    activejob (6.0.6.1)
+      activesupport (= 6.0.6.1)
       globalid (>= 0.3.6)
-    activemodel (6.1.3.1)
-      activesupport (= 6.1.3.1)
-    activerecord (6.1.3.1)
-      activemodel (= 6.1.3.1)
-      activesupport (= 6.1.3.1)
-    activestorage (6.1.3.1)
-      actionpack (= 6.1.3.1)
-      activejob (= 6.1.3.1)
-      activerecord (= 6.1.3.1)
-      activesupport (= 6.1.3.1)
-      marcel (~> 1.0.0)
-      mini_mime (~> 1.0.2)
-    activesupport (6.1.3.1)
+    activemodel (6.0.6.1)
+      activesupport (= 6.0.6.1)
+    activerecord (6.0.6.1)
+      activemodel (= 6.0.6.1)
+      activesupport (= 6.0.6.1)
+    activestorage (6.0.6.1)
+      actionpack (= 6.0.6.1)
+      activejob (= 6.0.6.1)
+      activerecord (= 6.0.6.1)
+      marcel (~> 1.0)
+    activesupport (6.0.6.1)
       concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 1.6, < 2)
-      minitest (>= 5.1)
-      tzinfo (~> 2.0)
-      zeitwerk (~> 2.3)
-    addressable (2.8.0)
-      public_suffix (>= 2.0.2, < 5.0)
+      i18n (>= 0.7, < 2)
+      minitest (~> 5.1)
+      tzinfo (~> 1.1)
+      zeitwerk (~> 2.2, >= 2.2.2)
+    addressable (2.8.6)
+      public_suffix (>= 2.0.2, < 6.0)
+    appraisal (2.5.0)
+      bundler
+      rake
+      thor (>= 0.14.0)
     builder (3.2.4)
     byebug (11.1.3)
-    capybara (3.35.3)
+    capybara (3.39.2)
       addressable
+      matrix
       mini_mime (>= 0.1.3)
       nokogiri (~> 1.8)
       rack (>= 1.6.0)
       rack-test (>= 0.6.3)
       regexp_parser (>= 1.5, < 3.0)
       xpath (~> 3.2)
-    childprocess (3.0.0)
-    concurrent-ruby (1.1.9)
+    concurrent-ruby (1.2.2)
     crass (1.0.6)
-    erubi (1.10.0)
-    globalid (0.5.1)
+    date (3.3.4)
+    erubi (1.12.0)
+    globalid (1.1.0)
       activesupport (>= 5.0)
-    i18n (1.8.10)
+    i18n (1.14.1)
       concurrent-ruby (~> 1.0)
-    loofah (2.10.0)
+    loofah (2.22.0)
       crass (~> 1.0.2)
-      nokogiri (>= 1.5.9)
-    mail (2.7.1)
+      nokogiri (>= 1.12.0)
+    mail (2.8.1)
       mini_mime (>= 0.1.1)
-    marcel (1.0.1)
+      net-imap
+      net-pop
+      net-smtp
+    marcel (1.0.2)
+    matrix (0.4.2)
     method_source (1.0.0)
-    mini_mime (1.0.3)
-    mini_portile2 (2.8.2)
-    minitest (5.14.4)
-    nio4r (2.5.7)
-    nokogiri (1.13.6)
-      mini_portile2 (~> 2.8.0)
+    mini_mime (1.1.5)
+    minitest (5.20.0)
+    net-imap (0.4.9.1)
+      date
+      net-protocol
+    net-pop (0.1.2)
+      net-protocol
+    net-protocol (0.2.2)
+      timeout
+    net-smtp (0.4.0.1)
+      net-protocol
+    nio4r (2.7.0)
+    nokogiri (1.16.0-aarch64-linux)
       racc (~> 1.4)
-    public_suffix (4.0.6)
-    racc (1.5.2)
-    rack (2.2.3)
-    rack-test (1.1.0)
-      rack (>= 1.0, < 3)
-    rails (6.1.3.1)
-      actioncable (= 6.1.3.1)
-      actionmailbox (= 6.1.3.1)
-      actionmailer (= 6.1.3.1)
-      actionpack (= 6.1.3.1)
-      actiontext (= 6.1.3.1)
-      actionview (= 6.1.3.1)
-      activejob (= 6.1.3.1)
-      activemodel (= 6.1.3.1)
-      activerecord (= 6.1.3.1)
-      activestorage (= 6.1.3.1)
-      activesupport (= 6.1.3.1)
-      bundler (>= 1.15.0)
-      railties (= 6.1.3.1)
+    nokogiri (1.16.0-arm64-darwin)
+      racc (~> 1.4)
+    nokogiri (1.16.0-x86_64-darwin)
+      racc (~> 1.4)
+    nokogiri (1.16.0-x86_64-linux)
+      racc (~> 1.4)
+    public_suffix (5.0.4)
+    racc (1.7.3)
+    rack (2.2.8)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rails (6.0.6.1)
+      actioncable (= 6.0.6.1)
+      actionmailbox (= 6.0.6.1)
+      actionmailer (= 6.0.6.1)
+      actionpack (= 6.0.6.1)
+      actiontext (= 6.0.6.1)
+      actionview (= 6.0.6.1)
+      activejob (= 6.0.6.1)
+      activemodel (= 6.0.6.1)
+      activerecord (= 6.0.6.1)
+      activestorage (= 6.0.6.1)
+      activesupport (= 6.0.6.1)
+      bundler (>= 1.3.0)
+      railties (= 6.0.6.1)
       sprockets-rails (>= 2.0.0)
-    rails-dom-testing (2.0.3)
-      activesupport (>= 4.2.0)
+    rails-dom-testing (2.2.0)
+      activesupport (>= 5.0.0)
+      minitest
       nokogiri (>= 1.6)
-    rails-html-sanitizer (1.3.0)
-      loofah (~> 2.3)
-    railties (6.1.3.1)
-      actionpack (= 6.1.3.1)
-      activesupport (= 6.1.3.1)
+    rails-html-sanitizer (1.6.0)
+      loofah (~> 2.21)
+      nokogiri (~> 1.14)
+    railties (6.0.6.1)
+      actionpack (= 6.0.6.1)
+      activesupport (= 6.0.6.1)
       method_source
       rake (>= 0.8.7)
-      thor (~> 1.0)
-    rake (13.0.6)
-    regexp_parser (2.1.1)
-    rexml (3.2.5)
+      thor (>= 0.20.3, < 2.0)
+    rake (13.1.0)
+    regexp_parser (2.9.0)
+    rexml (3.2.6)
     rubyzip (2.3.2)
-    selenium-webdriver (3.142.7)
-      childprocess (>= 0.5, < 4.0)
-      rubyzip (>= 1.2.2)
-    sprockets (4.0.2)
+    selenium-webdriver (4.10.0)
+      rexml (~> 3.2, >= 3.2.5)
+      rubyzip (>= 1.2.2, < 3.0)
+      websocket (~> 1.0)
+    sprockets (4.2.1)
       concurrent-ruby (~> 1.0)
-      rack (> 1, < 3)
-    sprockets-rails (3.2.2)
-      actionpack (>= 4.0)
-      activesupport (>= 4.0)
+      rack (>= 2.2.4, < 4)
+    sprockets-rails (3.4.2)
+      actionpack (>= 5.2)
+      activesupport (>= 5.2)
       sprockets (>= 3.0.0)
-    sqlite3 (1.4.2)
-    stimulus-rails (0.3.8)
-      rails (>= 6.0.0)
-    thor (1.1.0)
-    turbo-rails (0.7.4)
-      rails (>= 6.0.0)
-    tzinfo (2.0.4)
-      concurrent-ruby (~> 1.0)
-    webdrivers (4.6.0)
+    sqlite3 (1.7.0-aarch64-linux)
+    sqlite3 (1.7.0-arm64-darwin)
+    sqlite3 (1.7.0-x86_64-darwin)
+    sqlite3 (1.7.0-x86_64-linux)
+    stimulus-rails (1.3.3)
+      railties (>= 6.0.0)
+    thor (1.3.0)
+    thread_safe (0.3.6)
+    timeout (0.4.1)
+    turbo-rails (1.5.0)
+      actionpack (>= 6.0.0)
+      activejob (>= 6.0.0)
+      railties (>= 6.0.0)
+    tzinfo (1.2.11)
+      thread_safe (~> 0.1)
+    webdrivers (5.3.1)
       nokogiri (~> 1.6)
       rubyzip (>= 1.3.0)
-      selenium-webdriver (>= 3.0, < 4.0)
-    websocket-driver (0.7.5)
+      selenium-webdriver (~> 4.0, < 4.11)
+    websocket (1.2.10)
+    websocket-driver (0.7.6)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
     xpath (3.2.0)
       nokogiri (~> 1.8)
-    zeitwerk (2.4.2)
+    zeitwerk (2.6.12)
 
 PLATFORMS
   aarch64-linux
@@ -174,12 +203,14 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
+  appraisal
   byebug
   capybara
   jsbundling-rails!
-  rails (~> 6.1.0)
+  rails (~> 6.0.0)
   rexml
   selenium-webdriver
+  sprockets-rails
   sqlite3
   stimulus-rails
   turbo-rails
diff --git a/Rakefile b/Rakefile
new file mode 100644
index 0000000..793ce06
--- /dev/null
+++ b/Rakefile
@@ -0,0 +1,10 @@
+require "bundler/setup"
+require "bundler/gem_tasks"
+require "rake/testtask"
+
+Rake::TestTask.new(:test) do |t|
+  t.libs << "test"
+  t.pattern = "test/**/*_test.rb"
+end
+
+task default: :test
diff --git a/gemfiles/rails_7_0.gemfile b/gemfiles/rails_7_0.gemfile
new file mode 100644
index 0000000..7c6a756
--- /dev/null
+++ b/gemfiles/rails_7_0.gemfile
@@ -0,0 +1,21 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal"
+gem "rails", "~> 7.0.0"
+gem "sprockets-rails"
+gem "sqlite3"
+gem "propshaft"
+
+group :test do
+  gem "turbo-rails"
+  gem "stimulus-rails"
+  gem "byebug"
+  gem "rexml"
+  gem "capybara"
+  gem "selenium-webdriver"
+  gem "webdrivers"
+end
+
+gemspec path: "../"
diff --git a/gemfiles/rails_7_0.gemfile.lock b/gemfiles/rails_7_0.gemfile.lock
new file mode 100644
index 0000000..d75e0ea
--- /dev/null
+++ b/gemfiles/rails_7_0.gemfile.lock
@@ -0,0 +1,220 @@
+PATH
+  remote: ..
+  specs:
+    jsbundling-rails (1.2.2)
+      railties (>= 6.0.0)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    actioncable (7.0.8)
+      actionpack (= 7.0.8)
+      activesupport (= 7.0.8)
+      nio4r (~> 2.0)
+      websocket-driver (>= 0.6.1)
+    actionmailbox (7.0.8)
+      actionpack (= 7.0.8)
+      activejob (= 7.0.8)
+      activerecord (= 7.0.8)
+      activestorage (= 7.0.8)
+      activesupport (= 7.0.8)
+      mail (>= 2.7.1)
+      net-imap
+      net-pop
+      net-smtp
+    actionmailer (7.0.8)
+      actionpack (= 7.0.8)
+      actionview (= 7.0.8)
+      activejob (= 7.0.8)
+      activesupport (= 7.0.8)
+      mail (~> 2.5, >= 2.5.4)
+      net-imap
+      net-pop
+      net-smtp
+      rails-dom-testing (~> 2.0)
+    actionpack (7.0.8)
+      actionview (= 7.0.8)
+      activesupport (= 7.0.8)
+      rack (~> 2.0, >= 2.2.4)
+      rack-test (>= 0.6.3)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.0, >= 1.2.0)
+    actiontext (7.0.8)
+      actionpack (= 7.0.8)
+      activerecord (= 7.0.8)
+      activestorage (= 7.0.8)
+      activesupport (= 7.0.8)
+      globalid (>= 0.6.0)
+      nokogiri (>= 1.8.5)
+    actionview (7.0.8)
+      activesupport (= 7.0.8)
+      builder (~> 3.1)
+      erubi (~> 1.4)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.1, >= 1.2.0)
+    activejob (7.0.8)
+      activesupport (= 7.0.8)
+      globalid (>= 0.3.6)
+    activemodel (7.0.8)
+      activesupport (= 7.0.8)
+    activerecord (7.0.8)
+      activemodel (= 7.0.8)
+      activesupport (= 7.0.8)
+    activestorage (7.0.8)
+      actionpack (= 7.0.8)
+      activejob (= 7.0.8)
+      activerecord (= 7.0.8)
+      activesupport (= 7.0.8)
+      marcel (~> 1.0)
+      mini_mime (>= 1.1.0)
+    activesupport (7.0.8)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
+    addressable (2.8.6)
+      public_suffix (>= 2.0.2, < 6.0)
+    appraisal (2.5.0)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    builder (3.2.4)
+    byebug (11.1.3)
+    capybara (3.39.2)
+      addressable
+      matrix
+      mini_mime (>= 0.1.3)
+      nokogiri (~> 1.8)
+      rack (>= 1.6.0)
+      rack-test (>= 0.6.3)
+      regexp_parser (>= 1.5, < 3.0)
+      xpath (~> 3.2)
+    concurrent-ruby (1.2.2)
+    crass (1.0.6)
+    date (3.3.4)
+    erubi (1.12.0)
+    globalid (1.2.1)
+      activesupport (>= 6.1)
+    i18n (1.14.1)
+      concurrent-ruby (~> 1.0)
+    loofah (2.22.0)
+      crass (~> 1.0.2)
+      nokogiri (>= 1.12.0)
+    mail (2.8.1)
+      mini_mime (>= 0.1.1)
+      net-imap
+      net-pop
+      net-smtp
+    marcel (1.0.2)
+    matrix (0.4.2)
+    method_source (1.0.0)
+    mini_mime (1.1.5)
+    minitest (5.21.1)
+    net-imap (0.4.9.1)
+      date
+      net-protocol
+    net-pop (0.1.2)
+      net-protocol
+    net-protocol (0.2.2)
+      timeout
+    net-smtp (0.4.0.1)
+      net-protocol
+    nio4r (2.7.0)
+    nokogiri (1.16.0-x86_64-linux)
+      racc (~> 1.4)
+    propshaft (0.8.0)
+      actionpack (>= 7.0.0)
+      activesupport (>= 7.0.0)
+      rack
+      railties (>= 7.0.0)
+    public_suffix (5.0.4)
+    racc (1.7.3)
+    rack (2.2.8)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rails (7.0.8)
+      actioncable (= 7.0.8)
+      actionmailbox (= 7.0.8)
+      actionmailer (= 7.0.8)
+      actionpack (= 7.0.8)
+      actiontext (= 7.0.8)
+      actionview (= 7.0.8)
+      activejob (= 7.0.8)
+      activemodel (= 7.0.8)
+      activerecord (= 7.0.8)
+      activestorage (= 7.0.8)
+      activesupport (= 7.0.8)
+      bundler (>= 1.15.0)
+      railties (= 7.0.8)
+    rails-dom-testing (2.2.0)
+      activesupport (>= 5.0.0)
+      minitest
+      nokogiri (>= 1.6)
+    rails-html-sanitizer (1.6.0)
+      loofah (~> 2.21)
+      nokogiri (~> 1.14)
+    railties (7.0.8)
+      actionpack (= 7.0.8)
+      activesupport (= 7.0.8)
+      method_source
+      rake (>= 12.2)
+      thor (~> 1.0)
+      zeitwerk (~> 2.5)
+    rake (13.1.0)
+    regexp_parser (2.9.0)
+    rexml (3.2.6)
+    rubyzip (2.3.2)
+    selenium-webdriver (4.10.0)
+      rexml (~> 3.2, >= 3.2.5)
+      rubyzip (>= 1.2.2, < 3.0)
+      websocket (~> 1.0)
+    sprockets (4.2.1)
+      concurrent-ruby (~> 1.0)
+      rack (>= 2.2.4, < 4)
+    sprockets-rails (3.4.2)
+      actionpack (>= 5.2)
+      activesupport (>= 5.2)
+      sprockets (>= 3.0.0)
+    sqlite3 (1.7.0-x86_64-linux)
+    stimulus-rails (1.3.3)
+      railties (>= 6.0.0)
+    thor (1.3.0)
+    timeout (0.4.1)
+    turbo-rails (1.5.0)
+      actionpack (>= 6.0.0)
+      activejob (>= 6.0.0)
+      railties (>= 6.0.0)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
+    webdrivers (5.3.1)
+      nokogiri (~> 1.6)
+      rubyzip (>= 1.3.0)
+      selenium-webdriver (~> 4.0, < 4.11)
+    websocket (1.2.10)
+    websocket-driver (0.7.6)
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.5)
+    xpath (3.2.0)
+      nokogiri (~> 1.8)
+    zeitwerk (2.6.12)
+
+PLATFORMS
+  x86_64-linux
+
+DEPENDENCIES
+  appraisal
+  byebug
+  capybara
+  jsbundling-rails!
+  propshaft
+  rails (~> 7.0.0)
+  rexml
+  selenium-webdriver
+  sprockets-rails
+  sqlite3
+  stimulus-rails
+  turbo-rails
+  webdrivers
+
+BUNDLED WITH
+   2.3.8
diff --git a/gemfiles/rails_7_1.gemfile b/gemfiles/rails_7_1.gemfile
new file mode 100644
index 0000000..44414bb
--- /dev/null
+++ b/gemfiles/rails_7_1.gemfile
@@ -0,0 +1,21 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal"
+gem "rails", "~> 7.1.0"
+gem "sprockets-rails"
+gem "sqlite3"
+gem "propshaft"
+
+group :test do
+  gem "turbo-rails"
+  gem "stimulus-rails"
+  gem "byebug"
+  gem "rexml"
+  gem "capybara"
+  gem "selenium-webdriver"
+  gem "webdrivers"
+end
+
+gemspec path: "../"
diff --git a/gemfiles/rails_7_1.gemfile.lock b/gemfiles/rails_7_1.gemfile.lock
new file mode 100644
index 0000000..79fd262
--- /dev/null
+++ b/gemfiles/rails_7_1.gemfile.lock
@@ -0,0 +1,253 @@
+PATH
+  remote: ..
+  specs:
+    jsbundling-rails (1.2.2)
+      railties (>= 6.0.0)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    actioncable (7.1.2)
+      actionpack (= 7.1.2)
+      activesupport (= 7.1.2)
+      nio4r (~> 2.0)
+      websocket-driver (>= 0.6.1)
+      zeitwerk (~> 2.6)
+    actionmailbox (7.1.2)
+      actionpack (= 7.1.2)
+      activejob (= 7.1.2)
+      activerecord (= 7.1.2)
+      activestorage (= 7.1.2)
+      activesupport (= 7.1.2)
+      mail (>= 2.7.1)
+      net-imap
+      net-pop
+      net-smtp
+    actionmailer (7.1.2)
+      actionpack (= 7.1.2)
+      actionview (= 7.1.2)
+      activejob (= 7.1.2)
+      activesupport (= 7.1.2)
+      mail (~> 2.5, >= 2.5.4)
+      net-imap
+      net-pop
+      net-smtp
+      rails-dom-testing (~> 2.2)
+    actionpack (7.1.2)
+      actionview (= 7.1.2)
+      activesupport (= 7.1.2)
+      nokogiri (>= 1.8.5)
+      racc
+      rack (>= 2.2.4)
+      rack-session (>= 1.0.1)
+      rack-test (>= 0.6.3)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+    actiontext (7.1.2)
+      actionpack (= 7.1.2)
+      activerecord (= 7.1.2)
+      activestorage (= 7.1.2)
+      activesupport (= 7.1.2)
+      globalid (>= 0.6.0)
+      nokogiri (>= 1.8.5)
+    actionview (7.1.2)
+      activesupport (= 7.1.2)
+      builder (~> 3.1)
+      erubi (~> 1.11)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+    activejob (7.1.2)
+      activesupport (= 7.1.2)
+      globalid (>= 0.3.6)
+    activemodel (7.1.2)
+      activesupport (= 7.1.2)
+    activerecord (7.1.2)
+      activemodel (= 7.1.2)
+      activesupport (= 7.1.2)
+      timeout (>= 0.4.0)
+    activestorage (7.1.2)
+      actionpack (= 7.1.2)
+      activejob (= 7.1.2)
+      activerecord (= 7.1.2)
+      activesupport (= 7.1.2)
+      marcel (~> 1.0)
+    activesupport (7.1.2)
+      base64
+      bigdecimal
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      connection_pool (>= 2.2.5)
+      drb
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      mutex_m
+      tzinfo (~> 2.0)
+    addressable (2.8.6)
+      public_suffix (>= 2.0.2, < 6.0)
+    appraisal (2.5.0)
+      bundler
+      rake
+      thor (>= 0.14.0)
+    base64 (0.2.0)
+    bigdecimal (3.1.5)
+    builder (3.2.4)
+    byebug (11.1.3)
+    capybara (3.39.2)
+      addressable
+      matrix
+      mini_mime (>= 0.1.3)
+      nokogiri (~> 1.8)
+      rack (>= 1.6.0)
+      rack-test (>= 0.6.3)
+      regexp_parser (>= 1.5, < 3.0)
+      xpath (~> 3.2)
+    concurrent-ruby (1.2.2)
+    connection_pool (2.4.1)
+    crass (1.0.6)
+    date (3.3.4)
+    drb (2.2.0)
+      ruby2_keywords
+    erubi (1.12.0)
+    globalid (1.2.1)
+      activesupport (>= 6.1)
+    i18n (1.14.1)
+      concurrent-ruby (~> 1.0)
+    io-console (0.7.1)
+    irb (1.11.1)
+      rdoc
+      reline (>= 0.4.2)
+    loofah (2.22.0)
+      crass (~> 1.0.2)
+      nokogiri (>= 1.12.0)
+    mail (2.8.1)
+      mini_mime (>= 0.1.1)
+      net-imap
+      net-pop
+      net-smtp
+    marcel (1.0.2)
+    matrix (0.4.2)
+    mini_mime (1.1.5)
+    minitest (5.21.1)
+    mutex_m (0.2.0)
+    net-imap (0.4.9.1)
+      date
+      net-protocol
+    net-pop (0.1.2)
+      net-protocol
+    net-protocol (0.2.2)
+      timeout
+    net-smtp (0.4.0.1)
+      net-protocol
+    nio4r (2.7.0)
+    nokogiri (1.16.0-x86_64-linux)
+      racc (~> 1.4)
+    propshaft (0.8.0)
+      actionpack (>= 7.0.0)
+      activesupport (>= 7.0.0)
+      rack
+      railties (>= 7.0.0)
+    psych (5.1.2)
+      stringio
+    public_suffix (5.0.4)
+    racc (1.7.3)
+    rack (3.0.8)
+    rack-session (2.0.0)
+      rack (>= 3.0.0)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rackup (2.1.0)
+      rack (>= 3)
+      webrick (~> 1.8)
+    rails (7.1.2)
+      actioncable (= 7.1.2)
+      actionmailbox (= 7.1.2)
+      actionmailer (= 7.1.2)
+      actionpack (= 7.1.2)
+      actiontext (= 7.1.2)
+      actionview (= 7.1.2)
+      activejob (= 7.1.2)
+      activemodel (= 7.1.2)
+      activerecord (= 7.1.2)
+      activestorage (= 7.1.2)
+      activesupport (= 7.1.2)
+      bundler (>= 1.15.0)
+      railties (= 7.1.2)
+    rails-dom-testing (2.2.0)
+      activesupport (>= 5.0.0)
+      minitest
+      nokogiri (>= 1.6)
+    rails-html-sanitizer (1.6.0)
+      loofah (~> 2.21)
+      nokogiri (~> 1.14)
+    railties (7.1.2)
+      actionpack (= 7.1.2)
+      activesupport (= 7.1.2)
+      irb
+      rackup (>= 1.0.0)
+      rake (>= 12.2)
+      thor (~> 1.0, >= 1.2.2)
+      zeitwerk (~> 2.6)
+    rake (13.1.0)
+    rdoc (6.6.2)
+      psych (>= 4.0.0)
+    regexp_parser (2.9.0)
+    reline (0.4.2)
+      io-console (~> 0.5)
+    rexml (3.2.6)
+    ruby2_keywords (0.0.5)
+    rubyzip (2.3.2)
+    selenium-webdriver (4.10.0)
+      rexml (~> 3.2, >= 3.2.5)
+      rubyzip (>= 1.2.2, < 3.0)
+      websocket (~> 1.0)
+    sprockets (4.2.1)
+      concurrent-ruby (~> 1.0)
+      rack (>= 2.2.4, < 4)
+    sprockets-rails (3.4.2)
+      actionpack (>= 5.2)
+      activesupport (>= 5.2)
+      sprockets (>= 3.0.0)
+    sqlite3 (1.7.0-x86_64-linux)
+    stimulus-rails (1.3.3)
+      railties (>= 6.0.0)
+    stringio (3.1.0)
+    thor (1.3.0)
+    timeout (0.4.1)
+    turbo-rails (1.5.0)
+      actionpack (>= 6.0.0)
+      activejob (>= 6.0.0)
+      railties (>= 6.0.0)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
+    webdrivers (5.3.1)
+      nokogiri (~> 1.6)
+      rubyzip (>= 1.3.0)
+      selenium-webdriver (~> 4.0, < 4.11)
+    webrick (1.8.1)
+    websocket (1.2.10)
+    websocket-driver (0.7.6)
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.5)
+    xpath (3.2.0)
+      nokogiri (~> 1.8)
+    zeitwerk (2.6.12)
+
+PLATFORMS
+  x86_64-linux
+
+DEPENDENCIES
+  appraisal
+  byebug
+  capybara
+  jsbundling-rails!
+  propshaft
+  rails (~> 7.1.0)
+  rexml
+  selenium-webdriver
+  sprockets-rails
+  sqlite3
+  stimulus-rails
+  turbo-rails
+  webdrivers
+
+BUNDLED WITH
+   2.3.8
diff --git a/gemfiles/rails_main.gemfile b/gemfiles/rails_main.gemfile
new file mode 100644
index 0000000..faf99e7
--- /dev/null
+++ b/gemfiles/rails_main.gemfile
@@ -0,0 +1,21 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal"
+gem "rails", branch: "main", git: "https://github.com/rails/rails.git"
+gem "sprockets-rails"
+gem "sqlite3"
+gem "propshaft"
+
+group :test do
+  gem "turbo-rails"
+  gem "stimulus-rails"
+  gem "byebug"
+  gem "rexml"
+  gem "capybara"
+  gem "selenium-webdriver"
+  gem "webdrivers"
+end
+
+gemspec path: "../"
diff --git a/test/bun_installer_test.rb b/test/bun_installer_test.rb
new file mode 100644
index 0000000..cbb506c
--- /dev/null
+++ b/test/bun_installer_test.rb
@@ -0,0 +1,55 @@
+require "test_helper"
+require_relative "shared_installer_tests"
+
+class BunInstallerTest < ActiveSupport::TestCase
+  include RailsAppHelpers
+  include SharedInstallerTests
+
+  test "bun installer with pre-existing files" do
+    with_new_rails_app do
+      File.write(".gitattributes", "# pre-existing\n", mode: "a+")
+      File.write("Procfile.dev", "pre: existing\n", mode: "a+")
+
+      run_installer
+
+      File.read(".gitattributes").tap do |gitattributes|
+        assert_match "# pre-existing", gitattributes
+        assert_match "*.lockb diff=lockb", gitattributes
+      end
+
+      File.read("Procfile.dev").tap do |procfile|
+        assert_match "pre: existing", procfile
+        assert_match "js: bun run build --watch", procfile
+      end
+
+      JSON.load_file("package.json").tap do |package_json|
+        assert_equal "bun bun.config.js", package_json["scripts"]["build"]
+      end
+    end
+  end
+
+  test "bun installer without pre-existing files" do
+    with_new_rails_app do
+      FileUtils.rm_rf(".gitattributes")
+      FileUtils.rm_rf("Procfile.dev")
+
+      out, _err = run_installer
+
+      File.read(".gitattributes").tap do |gitattributes|
+        assert_match "*.lockb diff=lockb", gitattributes
+      end
+
+      File.read("Procfile.dev").tap do |procfile|
+        assert_match "js: bun run build --watch", procfile
+      end
+
+      assert_match "STUBBED gem install foreman", out
+    end
+  end
+
+  private
+    def run_installer
+      stub_bins("gem")
+      run_command("bin/rails", "javascript:install:bun")
+    end
+end
diff --git a/test/esbuild_installer_test.rb b/test/esbuild_installer_test.rb
new file mode 100644
index 0000000..f8d24c5
--- /dev/null
+++ b/test/esbuild_installer_test.rb
@@ -0,0 +1,28 @@
+require "test_helper"
+require_relative "shared_installer_tests"
+
+class EsbuildInstallerTest < ActiveSupport::TestCase
+  include RailsAppHelpers
+  include SharedInstallerTests
+
+  test "esbuild installer" do
+    with_new_rails_app do
+      out, _err = run_installer
+
+      File.read("Procfile.dev").tap do |procfile|
+        assert_match "js: yarn build --watch", procfile
+      end
+
+      assert_match "STUBBED gem install foreman", out
+      assert_match "STUBBED yarn add esbuild", out
+      assert_match %r{STUBBED npm (?:set-script build |pkg set scripts.build=)esbuild app/javascript/\*\.\*}, out
+      assert_match "STUBBED yarn build", out
+    end
+  end
+
+  private
+    def run_installer
+      stub_bins("gem", "yarn", "npm")
+      run_command("bin/rails", "javascript:install:esbuild")
+    end
+end
diff --git a/test/rollup_installer_test.rb b/test/rollup_installer_test.rb
new file mode 100644
index 0000000..d75bb49
--- /dev/null
+++ b/test/rollup_installer_test.rb
@@ -0,0 +1,31 @@
+require "test_helper"
+require_relative "shared_installer_tests"
+
+class RollupInstallerTest < ActiveSupport::TestCase
+  include RailsAppHelpers
+  include SharedInstallerTests
+
+  test "rollup installer" do
+    with_new_rails_app do
+      out, _err = run_installer
+
+      File.read("Procfile.dev").tap do |procfile|
+        assert_match "js: yarn build --watch", procfile
+      end
+
+      assert_match "STUBBED gem install foreman", out
+
+      assert File.exist?("rollup.config.js")
+
+      assert_match "STUBBED yarn add rollup", out
+      assert_match %r{STUBBED npm (?:set-script build |pkg set scripts.build=)rollup .*rollup.config.js}, out
+      assert_match "STUBBED yarn build", out
+    end
+  end
+
+  private
+    def run_installer
+      stub_bins("gem", "yarn", "npm")
+      run_command("bin/rails", "javascript:install:rollup")
+    end
+end
diff --git a/test/shared_installer_tests.rb b/test/shared_installer_tests.rb
new file mode 100644
index 0000000..4ceb687
--- /dev/null
+++ b/test/shared_installer_tests.rb
@@ -0,0 +1,99 @@
+require "json"
+
+module SharedInstallerTests
+  extend ActiveSupport::Concern
+
+  included do
+    test "basic installation with pre-existing files" do
+      with_new_rails_app do
+        File.write(".gitignore", "# pre-existing\n", mode: "a+")
+        File.write("package.json", %({ "name": "pre-existing" }\n))
+        File.write("Procfile.dev", "pre: existing\n", mode: "a+")
+        FileUtils.mkdir("app/javascript")
+        File.write("app/javascript/application.js", "// pre-existing\n", mode: "a+")
+
+        run_installer
+
+        File.read("bin/dev").tap do |bin_dev|
+          assert_equal File.read("#{__dir__}/../lib/install/dev"), bin_dev
+          assert_equal 0700, File.stat("bin/dev").mode & 0700
+        end
+
+        assert_equal 0, File.size("app/assets/builds/.keep")
+
+        File.read("app/views/layouts/application.html.erb").tap do |layout|
+          assert_match %(<%= javascript_include_tag "application", "data-turbo-track": "reload", type: "module" %>), layout[%r{<head.*</head>}m]
+        end
+
+        File.read(".gitignore").tap do |gitignore|
+          assert_match "# pre-existing", gitignore
+          assert_match "/app/assets/builds/*\n!/app/assets/builds/.keep", gitignore
+          assert_match "/node_modules", gitignore
+        end
+
+        JSON.load_file("package.json").tap do |package_json|
+          assert_equal "pre-existing", package_json["name"]
+        end
+
+        File.read("Procfile.dev").tap do |procfile|
+          assert_match "pre: existing", procfile
+          assert_match %r{^js: }, procfile
+        end
+
+        File.read("app/javascript/application.js").tap do |js_entrypoint|
+          assert_match "// pre-existing", js_entrypoint
+        end
+      end
+    end
+
+    test "basic installation without pre-existing files" do
+      with_new_rails_app do
+        FileUtils.rm("app/views/layouts/application.html.erb")
+        FileUtils.rm(".gitignore")
+        FileUtils.rm_rf("package.json")
+        FileUtils.rm_rf("Procfile.dev")
+        FileUtils.rm_rf("app/javascript/application.js")
+
+        out, _err = run_installer
+
+        assert_not File.exist?("app/views/layouts/application.html.erb")
+        assert_match "Add <%= javascript_include_tag", out
+
+        assert_not File.exist?(".gitignore")
+
+        JSON.load_file("package.json").tap do |package_json|
+          assert_includes package_json, "name"
+        end
+
+        File.read("Procfile.dev").tap do |procfile|
+          assert_match %r{^js: }, procfile
+        end
+
+        assert File.exist?("app/javascript/application.js")
+      end
+    end
+
+    test "basic installation with Sprockets" do
+      with_new_rails_app(*("--asset-pipeline=sprockets" if Rails::VERSION::MAJOR >= 7)) do
+        File.write("app/assets/config/manifest.js", "// pre-existing\n", mode: "a+")
+
+        run_installer
+
+        File.read("app/assets/config/manifest.js").tap do |sprockets_manifest|
+          assert_match "// pre-existing", sprockets_manifest
+          assert_match "//= link_tree ../builds", sprockets_manifest
+        end
+      end
+    end
+
+    if Rails::VERSION::MAJOR == 7
+      test "basic installation with Propshaft" do
+        with_new_rails_app("--asset-pipeline=propshaft") do
+          run_installer
+
+          assert_not File.exist?("app/assets/config/manifest.js")
+        end
+      end
+    end
+  end
+end
diff --git a/test/test_helper.rb b/test/test_helper.rb
new file mode 100644
index 0000000..a235e65
--- /dev/null
+++ b/test/test_helper.rb
@@ -0,0 +1,71 @@
+# Configure Rails Environment
+ENV["RAILS_ENV"] = "test"
+
+require "fileutils"
+require "rails"
+require "rails/test_help"
+
+module RailsAppHelpers
+  def self.included(base)
+    base.include ActiveSupport::Testing::Isolation
+  end
+
+  private
+    def create_new_rails_app(app_dir, *cli_options)
+      require "rails/generators/rails/app/app_generator"
+      Rails::Generators::AppGenerator.start([app_dir, "--skip-bundle", "--skip-bootsnap", "--quiet", cli_options].flatten)
+
+      Dir.chdir(app_dir) do
+        gemfile = File.read("Gemfile")
+
+        gemfile.gsub!(/^gem ["']jsbundling-rails["'].*/, "")
+        gemfile << %(gem "jsbundling-rails", path: #{File.expand_path("..", __dir__).inspect}\n)
+
+        if Rails::VERSION::PRE == "alpha"
+          gemfile.gsub!(/^gem ["']rails["'].*/, "")
+          gemfile << %(gem "rails", path: #{Gem.loaded_specs["rails"].full_gem_path.inspect}\n)
+        end
+
+        File.write("Gemfile", gemfile)
+
+        run_command("bundle", "install")
+      end
+    end
+
+    def with_new_rails_app(*cli_options, &block)
+      require "digest/sha1"
+      variant = [RUBY_VERSION, Gem.loaded_specs["rails"].full_gem_path, cli_options.flatten.sort]
+      app_name = "app_#{Digest::SHA1.hexdigest(variant.to_s)}"
+      cache_dir = "#{__dir__}/../tmp"
+      FileUtils.mkdir_p(cache_dir)
+
+      Dir.mktmpdir do |tmpdir|
+        if Dir.exist?("#{cache_dir}/#{app_name}")
+          FileUtils.cp_r("#{cache_dir}/#{app_name}", tmpdir)
+        else
+          create_new_rails_app("#{tmpdir}/#{app_name}", *cli_options)
+          FileUtils.cp_r("#{tmpdir}/#{app_name}", cache_dir) # Cache app for future runs.
+        end
+
+        Dir.chdir("#{tmpdir}/#{app_name}", &block)
+      end
+    end
+
+    def stub_bins(*names)
+      names.each do |name|
+        File.write("bin/#{name}", <<~BASH)
+          #!/usr/bin/env bash
+          echo STUBBED #{name} "$@"
+        BASH
+
+        FileUtils.chmod(0755, "bin/#{name}")
+      end
+    end
+
+    def run_command(*command)
+      Bundler.with_unbundled_env do
+        env = { "PATH" => "bin:#{ENV["PATH"]}" }
+        capture_subprocess_io { system(env, *command, exception: true) }
+      end
+    end
+end
diff --git a/test/webpack_installer_test.rb b/test/webpack_installer_test.rb
new file mode 100644
index 0000000..cd51f9e
--- /dev/null
+++ b/test/webpack_installer_test.rb
@@ -0,0 +1,31 @@
+require "test_helper"
+require_relative "shared_installer_tests"
+
+class WebpackInstallerTest < ActiveSupport::TestCase
+  include RailsAppHelpers
+  include SharedInstallerTests
+
+  test "webpack installer" do
+    with_new_rails_app do
+      out, _err = run_installer
+
+      File.read("Procfile.dev").tap do |procfile|
+        assert_match "js: yarn build --watch", procfile
+      end
+
+      assert_match "STUBBED gem install foreman", out
+
+      assert File.exist?("webpack.config.js")
+
+      assert_match "STUBBED yarn add webpack", out
+      assert_match %r{STUBBED npm (?:set-script build |pkg set scripts.build=)webpack --config webpack.config.js}, out
+      assert_match "STUBBED yarn build", out
+    end
+  end
+
+  private
+    def run_installer
+      stub_bins("gem", "yarn", "npm")
+      run_command("bin/rails", "javascript:install:webpack")
+    end
+end