Fix cucumber/rspec/doubles for rspec-mocks 3

CHANGELOG.md

@@ -9,6 +9,9 @@ This document is formatted according to the principles of [Keep A CHANGELOG](htt
 Please visit [cucumber/CONTRIBUTING.md](https://github.com/cucumber/cucumber/blob/master/CONTRIBUTING.md) for more info on how to contribute to Cucumber.
 
 ## [Unreleased]
+### Fixed
+- Fixed `cucumber/rspec/doubles` calling `RSpec::Mocks.setup` with an argument rspec-mocks 3 does not accept, and restored
+the verification of message expectations after each scenario
 
 ## [12.0.0] - 2026-10-12
 ### Added

features/docs/writing_support_code/rspec_doubles.feature

@@ -0,0 +1,51 @@
+Feature: RSpec doubles
+
+  Requiring `cucumber/rspec/doubles` makes rspec-mocks available in step definitions. Doubles and stubs are reset
+  after each scenario, and a message expectation that was not met fails the scenario.
+
+  Scenario: Stubs are reset between scenarios and unmet expectations fail
+    Given a file named "features/support/env.rb" with:
+      """
+      require 'cucumber/rspec/doubles'
+      """
+    And a file named "features/step_definitions/steps.rb" with:
+      """
+      class Greeter
+        def self.greeting = 'hello'
+      end
+
+      Given('the greeting is stubbed') do
+        allow(Greeter).to receive(:greeting).and_return('stubbed')
+      end
+
+      Given('a greeting is expected') do
+        expect(Greeter).to receive(:greeting)
+      end
+
+      Then('the greeting is {string}') do |greeting|
+        expect(Greeter.greeting).to eq(greeting)
+      end
+      """
+    And a file named "features/doubles.feature" with:
+      """
+      Feature: Doubles
+
+        Scenario: Stubbed
+          Given the greeting is stubbed
+          Then the greeting is "stubbed"
+
+        Scenario: No longer stubbed
+          Then the greeting is "hello"
+
+        Scenario: Unmet expectation
+          Given a greeting is expected
+      """
+    When I run `cucumber features/doubles.feature`
+    Then it should fail with:
+      """
+      Failing Scenarios:
+      cucumber features/doubles.feature:10 # Scenario: Unmet expectation
+
+      3 scenarios (1 failed, 2 passed)
+      """
+    And the output should contain "expected: 1 time with any arguments"

lib/cucumber/rspec/doubles.rb

@@ -5,9 +5,11 @@
 World(RSpec::Mocks::ExampleMethods)
 
 Before do
-  RSpec::Mocks.setup(self)
+  RSpec::Mocks.setup
 end
 
 After do
+  RSpec::Mocks.verify
+ensure
   RSpec::Mocks.teardown
 end