Enable world proxy in parameter transformers

CHANGELOG.md

@@ -13,6 +13,9 @@ Please see [CONTRIBUTING.md](./CONTRIBUTING.md) on how to contribute to Cucumber
 - `Hook` message now includes `type` ([#2463](https://github.com/cucumber/cucumber-js/pull/2463))
 - `TestRunStarted` message now includes `id`; `TestCase` and `TestRunFinished` messages reference it in `testRunStartedId` ([#2463](https://github.com/cucumber/cucumber-js/pull/2463))
 
+### Fixed
+- Enable world proxy in parameter transformers ([#2465](https://github.com/cucumber/cucumber-js/pull/2465))
+
 ## [11.1.1] - 2024-12-11
 ### Fixed
 - Correctly report error in publish plugin ([#2454](https://github.com/cucumber/cucumber-js/pull/2454))

features/scope_proxies.feature

@@ -5,7 +5,7 @@ Feature: Scope proxies
       """
       Feature: some feature
         Scenario: some scenario
-          Given a step
+          Given somebody called Lucy
       """
     And a file named "features/support/world.js" with:
       """
@@ -28,11 +28,28 @@ Feature: Scope proxies
   Scenario: world and context can be used from appropriate scopes
     Given a file named "features/step_definitions/cucumber_steps.js" with:
       """
-      const {BeforeAll,Given,BeforeStep,Before,world,context} = require('@cucumber/cucumber')
+      const {defineParameterType,BeforeAll,Given,BeforeStep,Before,world,context} = require('@cucumber/cucumber')
       const assert = require('node:assert/strict')
 
+      class Person {
+        #name;
+
+        constructor(name) {
+          this.#name = name
+        }
+      }
+
+      defineParameterType({
+        name: 'person',
+        regexp: /\w+/,
+        transformer: name => {
+          assert(world.isWorld())
+          return new Person(name);
+        }
+      })
+
       BeforeAll(() => assert.equal(context.parameters.a, 1))
-      Given('a step', () => assert(world.isWorld()))
+      Given('somebody called {person}', (person) => assert(world.isWorld()))
       BeforeStep(() => assert(world.isWorld()))
       Before(() => assert(world.isWorld()))
       """

src/runtime/step_runner.ts

@@ -32,10 +32,12 @@ export async function run({
   let error: any, result: any, invocationData: IGetInvocationDataResponse
 
   try {
-    invocationData = await stepDefinition.getInvocationParameters({
-      hookParameter,
-      step,
-      world,
+    await runInTestCaseScope({ world }, async () => {
+      invocationData = await stepDefinition.getInvocationParameters({
+        hookParameter,
+        step,
+        world,
+      })
     })
   } catch (err) {
     error = err