Support strict keyword argument matching

lib/mocha/configuration.rb

@@ -1,3 +1,5 @@
+require 'mocha/ruby_version'
+
 module Mocha
   # Allows setting of configuration options. See {Configuration} for the available options.
   #
@@ -43,7 +45,8 @@ class Configuration
       :stubbing_non_public_method => :allow,
       :stubbing_method_on_nil => :prevent,
       :display_matching_invocations_on_failure => false,
-      :reinstate_undocumented_behaviour_from_v1_9 => true
+      :reinstate_undocumented_behaviour_from_v1_9 => true,
+      :strict_keyword_argument_matching => false
     }.freeze
 
     attr_reader :options
@@ -303,6 +306,17 @@ def reinstate_undocumented_behaviour_from_v1_9?
       @options[:reinstate_undocumented_behaviour_from_v1_9]
     end
 
+    # @private
+    def strict_keyword_argument_matching=(value)
+      raise 'Strict keyword argument matching requires Ruby 2.7 and above.' unless Mocha::RUBY_V27_PLUS
+      @options[:strict_keyword_argument_matching] = value
+    end
+
+    # @private
+    def strict_keyword_argument_matching?
+      @options[:strict_keyword_argument_matching]
+    end
+
     class << self
       # Allow the specified +action+.
       #

lib/mocha/ruby_version.rb

@@ -1,4 +1,5 @@
 require 'mocha/deprecation'
 
 module Mocha
+  RUBY_V27_PLUS = Gem::Version.new(RUBY_VERSION.dup) >= Gem::Version.new('2.7')
 end

test/unit/configuration_test.rb

@@ -1,7 +1,12 @@
 require File.expand_path('../../test_helper', __FILE__)
 require 'mocha/configuration'
+require 'mocha/ruby_version'
 
 class ConfigurationTest < Mocha::TestCase
+  def teardown
+    Mocha::Configuration.reset_configuration
+  end
+
   def test_allow_temporarily_changes_config_when_given_block
     Mocha.configure { |c| c.stubbing_method_unnecessarily = :warn }
     yielded = false
@@ -34,4 +39,21 @@ def test_warn_when_temporarily_changes_config_when_given_block
     assert yielded
     assert_equal :allow, Mocha.configuration.stubbing_method_unnecessarily
   end
+
+  def test_strict_keyword_argument_matching_works_is_false_by_default
+    assert_equal false, Mocha.configuration.strict_keyword_argument_matching?
+  end
+
+  if Mocha::RUBY_V27_PLUS
+    def test_enabling_strict_keyword_argument_matching_works_in_ruby_2_7_and_above
+      Mocha.configure { |c| c.strict_keyword_argument_matching = true }
+      assert_equal true, Mocha.configuration.strict_keyword_argument_matching?
+    end
+  else
+    def test_enabling_strict_keyword_argument_matching_raises_error_if_below_ruby_2_7
+      assert_raises(RuntimeError, 'Strict keyword argument matching requires Ruby 2.7 and above.') do
+        Mocha.configure { |c| c.strict_keyword_argument_matching = true }
+      end
+    end
+  end
 end