gemini-suggestions, tests-fail

Gemfile

@@ -1,10 +1,24 @@
+# frozen_string_literal: true
+
 source 'https://rubygems.org'
 
-gem 'sinatra', '~> 3.0'
-gem 'puma', '~> 6.0'
 gem 'json', '~> 2.6'
+gem 'puma', '~> 6.0'
+gem 'sinatra', '~> 3.0'
 gem 'yaml', '~> 0.2'
 
 group :development do
   gem 'rerun'
 end
+
+group :development, :test do
+  gem 'rack-test' # For HTTP integration tests
+  # Choose one testing framework:
+  gem 'minitest' # Uncomment this line if you prefer Minitest
+  gem 'rspec' # Uncomment this line if you prefer RSpec
+
+  gem 'rubocop'
+  gem 'rubocop-minitest'
+  gem 'rubocop-performance'
+  gem 'rubocop-rspec'
+end