add SimpleCov

Author: AlexStavrianos

.gitignore

@@ -32,3 +32,4 @@
 
 # Ignore master key for decrypting credentials and more.
 /config/master.key
+coverage/

Gemfile

@@ -57,6 +57,7 @@ group :development do
 end
 
 group :test do
+  gem 'simplecov', require: false
   # Use system testing [https://guides.rubyonrails.org/testing.html#system-testing]
   gem "capybara"
   gem "selenium-webdriver"

Gemfile.lock

@@ -102,6 +102,7 @@ GEM
     debug (1.10.0)
       irb (~> 1.10)
       reline (>= 0.3.8)
+    docile (1.4.1)
     dotenv (3.1.8)
     drb (2.2.3)
     ed25519 (1.4.0)
@@ -288,6 +289,12 @@ GEM
       rexml (~> 3.2, >= 3.2.5)
       rubyzip (>= 1.2.2, < 3.0)
       websocket (~> 1.0)
+    simplecov (0.22.0)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+    simplecov-html (0.13.1)
+    simplecov_json_formatter (0.1.4)
     solid_cable (3.0.8)
       actioncable (>= 7.2)
       activejob (>= 7.2)
@@ -373,6 +380,7 @@ DEPENDENCIES
   rails (~> 8.0.2)
   rubocop-rails-omakase
   selenium-webdriver
+  simplecov
   solid_cable
   solid_cache
   solid_queue

test/test_helper.rb

@@ -1,3 +1,13 @@
+require "simplecov"
+
+SimpleCov.start "rails" do
+  use_merging true
+  merge_timeout 3600
+  enable_coverage :branch
+  add_filter "/test/"
+  add_filter "/config/"
+end
+
 ENV["RAILS_ENV"] ||= "test"
 require_relative "../config/environment"
 require "rails/test_help"
@@ -7,6 +17,13 @@ module ActiveSupport
   class TestCase
     # Run tests in parallel with specified workers
     parallelize(workers: :number_of_processors)
+    parallelize_setup do |worker|
+      SimpleCov.command_name "#{SimpleCov.command_name}[#{worker}]"
+    end
+
+    parallelize_teardown do |worker|
+      SimpleCov.result
+    end
 
     # Setup all fixtures in test/fixtures/*.yml for all tests in alphabetical order.
     fixtures :all
@@ -16,8 +33,6 @@ class TestCase
 end
 
 
-
-
 class ActionDispatch::IntegrationTest
   include SignInHelper
 end