Fix prototypes and explicitly enable them

lib/utils/prototypes.js

@@ -3,56 +3,27 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-Object.defineProperty(String.prototype, 'fromCodePoint', function () {
-  let chars = []
-  let point, offset, units, i
-  for (i = 0; i < arguments.length; ++i) {
-    point = arguments[i]
-    offset = point - 0x10000
-    units = point > 0xFFFF
-      ? [
-        0xD800 + (offset >> 10),
-        0xDC00 + (offset & 0x3FF)]
-      : [point]
-    chars.push(String.fromCharCode.apply(null, units))
+const utils = require('../utils')
+
+class prototypes extends utils {
+  static enable () {
+    if (!String.prototype.hasOwnProperty('insert')) {
+      Object.defineProperty(String.prototype, 'insert', {
+        value: function (data, i) {
+          return this.slice(0, i) + data + this.slice(i, this.length)
         }
-  return chars.join('')
       })
+    }
 
-Object.defineProperty(String.prototype, 'endsWith', function (str) {
-  return this.match(str + '$') === str
-})
-
-Object.defineProperty(String.prototype, 'startsWith', function (str) {
-  return this.match('^' + str) === str
-})
-
-Object.defineProperty(String.prototype, 'trim', function () {
-  return this.replace(/^[\s\xA0]+/, '').replace(/[\s\xA0]+$/, '')
-})
-
-Object.defineProperty(String.prototype, 'insert', function (data, idx) {
-  return this.slice(0, idx) + data + this.slice(idx, this.length)
-})
-
-Object.defineProperty(Array.prototype, 'has', function (v) {
+    if (!Array.prototype.hasOwnProperty('has')) {
+      Object.defineProperty(Array.prototype, 'has', {
+        value: function (v) {
           return this.indexOf(v) !== -1
-})
-
-Object.defineProperty(Array.prototype, 'forEach', function (array, fn) {
-  for (let i = 0; i < array.length; i++) {
-    fn(array[i])
         }
       })
+    }
 
-Object.defineProperty(Array.prototype, 'map', function (fn, array) {
-  let result = []
-  Array.forEach(array, function (element) {
-    result.push(fn(element))
-  })
-  return result
-})
-
+    if (!Array.prototype.hasOwnProperty('extend')) {
       Object.defineProperty(Array.prototype, 'extend', {
         value: function (obj) {
           if (Array.isArray(obj)) {
@@ -66,10 +37,17 @@ Object.defineProperty(Array.prototype, 'extend', {
           }
         }
       })
+    }
 
+    if (!Object.hasOwnProperty('isObject')) {
       Object.defineProperty(Object, 'isObject', {
         value: function (obj) {
           return (obj !== null && typeof obj === 'object' &&
             Object.prototype.toString.call(obj) === '[object Object]')
         }
       })
+    }
+  }
+}
+
+module.exports = prototypes

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@mozillasecurity/octo",
-  "version": "1.0.8",
+  "version": "1.0.9",
   "description": "",
   "keywords": [
     "fuzzing",