Merge pull request #1385 from bryanp/fix-kwargs-for-ruby3

Resolve an issue using method doubles with keyword arguments on Ruby 3

Author: JonRowe

lib/rspec/mocks/method_double.rb

@@ -63,6 +63,7 @@ def define_proxy_method
           define_method(method_name) do |*args, &block|
             method_double.proxy_method_invoked(self, *args, &block)
           end
+          ruby2_keywords(method_name) if Module.private_method_defined?(:ruby2_keywords)
           __send__(visibility, method_name)
         end
 

spec/rspec/mocks/and_call_original_spec.rb

@@ -185,6 +185,16 @@ class << self
       expect(klazz.alternate_new).to be_an_instance_of(klazz)
     end
 
+    if RSpec::Support::RubyFeatures.kw_args_supported?
+      binding.eval(<<-CODE, __FILE__, __LINE__)
+      it "works for methods that accept keyword arguments" do
+        def instance.foo(bar: nil); bar; end
+        expect(instance).to receive(:foo).and_call_original
+        expect(instance.foo(bar: "baz")).to eq("baz")
+      end
+      CODE
+    end
+
     context 'on an object that defines method_missing' do
       before do
         klass.class_exec do