Reproduction case for Ruby 3.2 and kwargs detection

.github/workflows/ci.yml

@@ -38,6 +38,7 @@ jobs:
     strategy:
       matrix:
         ruby:
+          - '3.2.0-preview2'
           - '3.1'
           - '3.0'
           - 2.7

spec/rspec/mocks/matchers/receive_spec.rb

@@ -31,6 +31,20 @@ module Mocks
         end
       end
 
+      # FIXME: this is defined here to prevent
+      # "warning: method redefined; discarding old kw_args_method"
+      # because shared examples are evaluated several times.
+      # When we flatten those shared examples in RSpec 4 because
+      # of no "should" syntax, it will become possible to put this
+      # class definition closer to examples that use it.
+      if RSpec::Support::RubyFeatures.required_kw_args_supported?
+        binding.eval(<<-RUBY, __FILE__, __LINE__)
+        class TestObject
+          def kw_args_method(a:, b:); end
+        end
+        RUBY
+      end
+
       shared_examples "a receive matcher" do |*options|
         it 'allows the caller to configure how the subject responds' do
           wrapped.to receive(:foo).and_return(5)
@@ -109,6 +123,18 @@ module Mocks
 
               expect(receiver.foo(kw: :arg)).to eq(:arg)
             end
+
+            it "expects to receive keyword args" do
+              dbl = instance_double(TestObject)
+              expect(dbl).to receive(:kw_args_method).with(a: 1, b: 2)
+              dbl.kw_args_method(a: 1, b: 2)
+            end
+
+            it "expects to receive keyword args with a hash" do
+              dbl = instance_double(TestObject)
+              expect(dbl).to receive(:kw_args_method).with({a: 1, b: 2})
+              dbl.kw_args_method(a: 1, b: 2)
+            end
             RUBY
           end
         end