Add an example that reuses a step definition

README.md

@@ -47,3 +47,11 @@ Shows how to use promises and `async`/`await` when testing asynchronous code.
 ### ts
 
 Defining steps in TypeScript.
+
+### type-parser
+
+Defines custom parameter types.
+
+### reuse
+
+Suggests a way to reuse step definitions.

reuse/babel.config.js

@@ -0,0 +1,7 @@
+module.exports = {
+  presets: [
+    [ '@babel/env', {
+      useBuiltIns: 'usage'
+    }]
+  ]
+}

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'])
+})

reuse/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "reuse",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "cucumber-js --require-module '@babel/register'"
+  },
+  "author": "Eugen Wissner <belka@caraus.de>",
+  "license": "MPL-2.0",
+  "devDependencies": {
+    "@babel/core": "^7.2.2",
+    "@babel/preset-env": "^7.2.3",
+    "@babel/register": "^7.0.0",
+    "babel-loader": "^8.0.4",
+    "chai": "^4.2.0",
+    "cucumber": "^5.0.3"
+  }
+}