running single tests is slow, use spring

Author: tsubik

Gemfile

@@ -114,8 +114,8 @@ group :development, :test do
   gem "faker"
   gem "parallel_tests"
   gem "rails-erd"
-  gem "rubocop-rails"
-  gem "standard"
+  gem "rubocop-rails", require: false
+  gem "standard", require: false
   gem "webmock"
 end
 
@@ -149,6 +149,7 @@ group :test do
   gem "rspec-request_snapshot", github: "tsubik/rspec-request_snapshot", branch: "fix/ignore-order"
   gem "shoulda-matchers", "~> 4.0.1"
   gem "simplecov"
+  gem "spring-commands-rspec"
   gem "super_diff"
 end
 

Gemfile.lock

@@ -724,6 +724,9 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.13.1)
     simplecov_json_formatter (0.1.4)
+    spring (4.3.0)
+    spring-commands-rspec (1.0.4)
+      spring (>= 0.9.1)
     sprockets (4.2.2)
       concurrent-ruby (~> 1.0)
       logger
@@ -884,6 +887,7 @@ DEPENDENCIES
   shoulda-matchers (~> 4.0.1)
   sidekiq
   simplecov
+  spring-commands-rspec
   sprockets-rails
   standard
   super_diff

bin/rspec

@@ -0,0 +1,4 @@
+#!/usr/bin/env ruby
+load File.expand_path("spring", __dir__)
+require 'bundler/setup'
+load Gem.bin_path('rspec-core', 'rspec')

bin/spring

@@ -0,0 +1,14 @@
+#!/usr/bin/env ruby
+
+# This file loads Spring without loading other gems in the Gemfile in order to be fast.
+# It gets overwritten when you run the `spring binstub` command.
+
+if !defined?(Spring) && [nil, "development", "test"].include?(ENV["RAILS_ENV"])
+  require "bundler"
+
+  Bundler.locked_gems.specs.find { |spec| spec.name == "spring" }&.tap do |spring|
+    Gem.use_paths Gem.dir, Bundler.bundle_path.to_s, *Gem.path
+    gem "spring", spring.version
+    require "spring/binstub"
+  end
+end

config/environments/test.rb

@@ -9,8 +9,8 @@
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
-  # While tests run files are not watched, reloading is not necessary.
-  config.enable_reloading = false
+  # While tests run files are not watched, reloading is not necessary. (unless you are using Spring)
+  config.enable_reloading = defined?(Spring)
 
   # Eager loading loads your entire application. When running a single test locally,
   # this is usually not necessary, and can slow down your test suite. However, it's

spec/rails_helper.rb

@@ -24,7 +24,9 @@
 
 # TODO: try to remove the line below the comment after some time, not sure why this still not working
 # see https://github.com/rails/rails/issues/49958
-RSpec::Matchers::AliasedNegatedMatcher.undef_method(:with)
+# somehow this does not work with spring. I have no time to debug this, only one test is failing without this line
+# and mostly using spring to run single tests so this is not a problem for me
+RSpec::Matchers::AliasedNegatedMatcher.undef_method(:with) unless defined?(Spring)
 RSpec::Matchers.define_negated_matcher :have_not_enqueued_mail, :have_enqueued_mail
 
 # Configuration for Shoulda::Matchers