improve test setup

Gemfile

@@ -2,49 +2,16 @@ source "https://rubygems.org"
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
 ruby "3.1.1"
-
-# Bundle edge Rails instead: gem "rails", github: "rails/rails", branch: "main"
 gem "rails", "~> 7.0.2", ">= 7.0.2.2"
-
-# Use postgresql as the database for Active Record
 gem "pg", "~> 1.1"
-
-# Use the Puma web server [https://github.com/puma/puma]
 gem "puma", "~> 5.0"
 
-# Build JSON APIs with ease [https://github.com/rails/jbuilder]
-# gem "jbuilder"
-
-# Use Redis adapter to run Action Cable in production
-# gem "redis", "~> 4.0"
-
-# Use Kredis to get higher-level data types in Redis [https://github.com/rails/kredis]
-# gem "kredis"
-
-# Use Active Model has_secure_password [https://guides.rubyonrails.org/active_model_basics.html#securepassword]
-# gem "bcrypt", "~> 3.1.7"
-
-# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
-gem "tzinfo-data", platforms: %i[ mingw mswin x64_mingw jruby ]
-
-# Reduces boot times through caching; required in config/boot.rb
 gem "bootsnap", require: false
 
-# Use Active Storage variants [https://guides.rubyonrails.org/active_storage_overview.html#transforming-images]
-# gem "image_processing", "~> 1.2"
-
-# Use Rack CORS for handling Cross-Origin Resource Sharing (CORS), making cross-origin AJAX possible
-# gem "rack-cors"
-
 group :development, :test do
-  # See https://guides.rubyonrails.org/debugging_rails_applications.html#debugging-with-the-debug-gem
   gem "debug", platforms: %i[ mri mingw x64_mingw ]
+
+  gem "rspec-rails", "~> 5.1"
+  gem "factory_bot_rails", "~> 6.2"
+  gem "shoulda-matchers", "~> 5.1"
 end
-
-group :development do
-  # Speed up commands on slow machines / big apps [https://github.com/rails/spring]
-  # gem "spring"
-end
-
-
-gem "rspec-rails", "~> 5.1"

Gemfile.lock

@@ -77,6 +77,11 @@ GEM
     diff-lcs (1.5.0)
     digest (3.1.0)
     erubi (1.10.0)
+    factory_bot (6.2.0)
+      activesupport (>= 5.0.0)
+    factory_bot_rails (6.2.0)
+      factory_bot (~> 6.2.0)
+      railties (>= 5.0.0)
     globalid (1.0.0)
       activesupport (>= 5.0)
     i18n (1.10.0)
@@ -166,6 +171,8 @@ GEM
       rspec-mocks (~> 3.10)
       rspec-support (~> 3.10)
     rspec-support (3.11.0)
+    shoulda-matchers (5.1.0)
+      activesupport (>= 5.2.0)
     strscan (3.0.1)
     thor (1.2.1)
     timeout (0.2.0)
@@ -182,11 +189,12 @@ PLATFORMS
 DEPENDENCIES
   bootsnap
   debug
+  factory_bot_rails (~> 6.2)
   pg (~> 1.1)
   puma (~> 5.0)
   rails (~> 7.0.2, >= 7.0.2.2)
   rspec-rails (~> 5.1)
-  tzinfo-data
+  shoulda-matchers (~> 5.1)
 
 RUBY VERSION
    ruby 3.1.1p18

spec/rails_helper.rb

@@ -62,3 +62,10 @@ RSpec.configure do |config|
   # arbitrary gems may also be filtered via:
   # config.filter_gems_from_backtrace("gem name")
 end
+
+Shoulda::Matchers.configure do |config|
+  config.integrate do |with|
+    with.test_framework :rspec
+    with.library :rails
+  end
+end