Add an example that reuses a step definition

reuse/features/reusable.feature

@@ -0,0 +1,5 @@
+Feature:
+	Scenario:
+		Given a person with name
+		And a person named Jack
+		Then the same function is called for two distinct step definitions

reuse/features/steps/reusable.js

@@ -0,0 +1,28 @@
+import { Before, Given, Then } from 'cucumber'
+import { expect } from 'chai'
+
+Before(function () {
+  this.names = []
+})
+
+function step (name) {
+  this.names.push(name)
+}
+
+function decorator (f, ...args) {
+  if (args.length > 0) {
+    return function () {
+      f.call(this, args[0])
+    } 
+  } else {
+    return f
+  }
+}
+
+Given('a person with name', decorator(step, 'John'))
+Given('a person named {word}', decorator(step))
+
+Then('the same function is called for two distinct step definitions', function () {
+  expect(this.names).to.have.lengthOf(2)
+  expect(this.names).to.include.members(['John', 'Jack'])
+})