Add SimpleCov

.gitignore

@@ -26,6 +26,7 @@
 # application specific
 database.yml
 examples.txt
+coverage
 
 /public/packs
 /public/packs-test

Gemfile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source 'https://rubygems.org'
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
@@ -33,16 +35,20 @@ gem 'jquery-rails'
 
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
-  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
+  gem 'byebug', platforms: %i[mri mingw x64_mingw]
+  gem 'factory_bot_rails'
   gem 'rspec-rails'
   gem 'shoulda-matchers'
-  gem 'factory_bot_rails'
+end
+
+group :test do
+  gem 'simplecov', require: false
 end
 
 group :development do
   # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
-  gem 'web-console', '>= 3.3.0'
   gem 'listen', '>= 3.0.5', '< 3.2'
+  gem 'web-console', '>= 3.3.0'
   # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
   gem 'spring'
   gem 'spring-watcher-listen', '~> 2.0.0'

Gemfile.lock

@@ -70,6 +70,7 @@ GEM
     concurrent-ruby (1.1.6)
     crass (1.0.6)
     diff-lcs (1.3)
+    docile (1.3.2)
     erubi (1.9.0)
     execjs (2.7.0)
     factory_bot (5.1.2)
@@ -177,6 +178,10 @@ GEM
       tilt
     shoulda-matchers (4.3.0)
       activesupport (>= 4.2.0)
+    simplecov (0.18.5)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+    simplecov-html (0.12.2)
     spring (2.1.0)
     spring-watcher-listen (2.0.1)
       listen (>= 2.7, < 4.0)
@@ -227,6 +232,7 @@ DEPENDENCIES
   rspec-rails
   sass-rails (>= 6)
   shoulda-matchers
+  simplecov
   spring
   spring-watcher-listen (~> 2.0.0)
   turbolinks (~> 5)

spec/rails_helper.rb

@@ -1,9 +1,17 @@
+# frozen_string_literal: true
+
 # This file is copied to spec/ when you run 'rails generate rspec:install'
+
+require 'simplecov'
+SimpleCov.start 'rails'
+
 require 'spec_helper'
 ENV['RAILS_ENV'] ||= 'test'
 require File.expand_path('../config/environment', __dir__)
 # Prevent database truncation if the environment is production
-abort('The Rails environment is running in production mode!') if Rails.env.production?
+if Rails.env.production?
+  abort('The Rails environment is running in production mode!')
+end
 require 'rspec/rails'
 # Add additional requires below this line. Rails is not loaded until this point!
 require 'support/factory_bot'
@@ -69,4 +77,4 @@
     with.test_framework :rspec
     with.library :rails
   end
-end
+end