Refactor to encapsulate in module

spec/deprecation_toolkit_env.rb

 # frozen_string_literal: true
 
-if ENV.key?('RECORD_DEPRECATIONS')
-  require 'deprecation_toolkit'
-  require 'deprecation_toolkit/rspec'
-  DeprecationToolkit::Configuration.test_runner = :rspec
-  DeprecationToolkit::Configuration.deprecation_path = 'deprecations'
-  DeprecationToolkit::Configuration.behavior = DeprecationToolkit::Behaviors::Record
+require 'deprecation_toolkit'
+require 'deprecation_toolkit/rspec'
+
+module DeprecationToolkitEnv
+  # Taken from https://github.com/jeremyevans/ruby-warning/blob/1.1.0/lib/warning.rb#L18
+  def self.kwargs_warning
+    %r{warning: (?:Using the last argument (?:for `.+' )?as keyword parameters is deprecated; maybe \*\* should be added to the call|Passing the keyword argument (?:for `.+' )?as the last hash parameter is deprecated|Splitting the last argument (?:for `.+' )?into positional and keyword parameters is deprecated|The called method (?:`.+' )?is defined here)\n\z}
+  end
+
+  def self.configure!
+    return unless ENV.key?('RECORD_DEPRECATIONS')
 
     # Enable ruby deprecations for keywords, it's suppressed by default in Ruby 2.7.2
     Warning[:deprecated] = true
 
-  kwargs_warnings = [
-    # Taken from https://github.com/jeremyevans/ruby-warning/blob/1.1.0/lib/warning.rb#L18
-    %r{warning: (?:Using the last argument (?:for `.+' )?as keyword parameters is deprecated; maybe \*\* should be added to the call|Passing the keyword argument (?:for `.+' )?as the last hash parameter is deprecated|Splitting the last argument (?:for `.+' )?into positional and keyword parameters is deprecated|The called method (?:`.+' )?is defined here)\n\z}
-  ]
-  DeprecationToolkit::Configuration.warnings_treated_as_deprecation = kwargs_warnings
+    DeprecationToolkit::Configuration.test_runner = :rspec
+    DeprecationToolkit::Configuration.deprecation_path = 'deprecations'
+    DeprecationToolkit::Configuration.warnings_treated_as_deprecation = [kwargs_warning]
+    DeprecationToolkit::Configuration.behavior = DeprecationToolkit::Behaviors::Record
+  end
 end

spec/spec_helper.rb

@@ -13,6 +13,7 @@ end
 Warning[:deprecated] = true unless ENV.key?('SILENCE_DEPRECATIONS')
 
 require './spec/deprecation_toolkit_env'
+DeprecationToolkitEnv.configure!
 
 require './spec/simplecov_env'
 SimpleCovEnv.start!