.

node_modules/is-accessor-descriptor/index.js

@@ -0,0 +1,69 @@
+/*!
+ * is-accessor-descriptor <https://github.com/jonschlinkert/is-accessor-descriptor>
+ *
+ * Copyright (c) 2015, Jon Schlinkert.
+ * Licensed under the MIT License.
+ */
+
+'use strict';
+
+var typeOf = require('kind-of');
+
+// accessor descriptor properties
+var accessor = {
+  get: 'function',
+  set: 'function',
+  configurable: 'boolean',
+  enumerable: 'boolean'
+};
+
+function isAccessorDescriptor(obj, prop) {
+  if (typeof prop === 'string') {
+    var val = Object.getOwnPropertyDescriptor(obj, prop);
+    return typeof val !== 'undefined';
+  }
+
+  if (typeOf(obj) !== 'object') {
+    return false;
+  }
+
+  if (has(obj, 'value') || has(obj, 'writable')) {
+    return false;
+  }
+
+  if (!has(obj, 'get') || typeof obj.get !== 'function') {
+    return false;
+  }
+
+  // tldr: it's valid to have "set" be undefined
+  // "set" might be undefined if `Object.getOwnPropertyDescriptor`
+  // was used to get the value, and only `get` was defined by the user
+  if (has(obj, 'set') && typeof obj[key] !== 'function' && typeof obj[key] !== 'undefined') {
+    return false;
+  }
+
+  for (var key in obj) {
+    if (!accessor.hasOwnProperty(key)) {
+      continue;
+    }
+
+    if (typeOf(obj[key]) === accessor[key]) {
+      continue;
+    }
+
+    if (typeof obj[key] !== 'undefined') {
+      return false;
+    }
+  }
+  return true;
+}
+
+function has(obj, key) {
+  return {}.hasOwnProperty.call(obj, key);
+}
+
+/**
+ * Expose `isAccessorDescriptor`
+ */
+
+module.exports = isAccessorDescriptor;