fix check for spring running

Author: tsubik

config/environments/test.rb

@@ -10,7 +10,7 @@
   # Settings specified here will take precedence over those in config/application.rb.
 
   # While tests run files are not watched, reloading is not necessary. (unless you are using Spring)
-  config.enable_reloading = defined?(Spring)
+  config.enable_reloading = ENV["SPRING_SPAWN_ENV"].present?
 
   # 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

@@ -26,7 +26,7 @@
 # see https://github.com/rails/rails/issues/49958
 # 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::AliasedNegatedMatcher.undef_method(:with) unless ENV["SPRING_SPAWN_ENV"]
 RSpec::Matchers.define_negated_matcher :have_not_enqueued_mail, :have_enqueued_mail
 
 # Configuration for Shoulda::Matchers