first commit

.editorconfig

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+# http://editorconfig.org
+root = true
+
+[*]
+indent_style = space
+end_of_line = lf
+charset = utf-8
+indent_size = 2
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.md]
+trim_trailing_whitespace = false
+insert_final_newline = false
+
+[{,test/}{actual,fixtures}/**]
+trim_trailing_whitespace = false
+insert_final_newline = false
+
+[templates/**]
+trim_trailing_whitespace = false
+insert_final_newline = false

.gitattributes

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+# Enforce Unix newlines
+* text eol=lf
+
+# binaries
+*.ai binary
+*.psd binary
+*.jpg binary
+*.gif binary
+*.png binary
+*.jpeg binary

.gitignore

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+*.DS_Store
+*.sublime-*
+_gh_pages
+bower_components
+node_modules
+npm-debug.log
+actual
+test/actual
+temp
+tmp
+TODO.md
+vendor
+.idea
+benchmark
+coverage

.jshintrc

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+{
+  "asi": false,
+  "boss": true,
+  "curly": true,
+  "eqeqeq": true,
+  "eqnull": true,
+  "esnext": true,
+  "immed": true,
+  "latedef": false,
+  "laxcomma": false,
+  "mocha": true,
+  "newcap": true,
+  "noarg": true,
+  "node": true,
+  "sub": true,
+  "undef": true,
+  "unused": true
+}

.travis.yml

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+sudo: false
+language: node_js
+node_js:
+  - "0.10"
+  - "0.12"
+  - "0.13"
+  - "iojs"
+matrix:
+  fast_finish: true
+  allow_failures:
+    - node_js: "0.13"

.verb.md

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+# {%= name %} {%= badge("fury") %}
+
+> {%= description %}
+
+## Install
+{%= include("install-npm", {save: true}) %}
+
+## Usage
+
+```js
+var isDataDescriptor = require('{%= name %}');
+```
+
+## API
+<!-- add a path or glob pattern for files with code comments to use for docs  -->
+{%%= apidocs("index.js") %}
+
+## Related projects
+<!-- add an array of related projects, then un-escape the helper -->
+{%%= related([]) %}  
+
+## Running tests
+{%= include("tests") %}
+
+## Contributing
+{%= include("contributing") %}
+
+## Author
+{%= include("author") %}
+
+## License
+{%= copyright() %}
+{%= license() %}
+
+***
+
+{%= include("footer") %}

LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2015, Jon Schlinkert.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

index.js

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+/*!
+ * is-data-descriptor <https://github.com/jonschlinkert/is-data-descriptor>
+ *
+ * Copyright (c) 2015, Jon Schlinkert.
+ * Licensed under the MIT License.
+ */
+
+'use strict';
+
+var diff = require('arr-diff');
+var typeOf = require('kind-of');
+
+// data descriptor properties
+var data = {
+  configurable: 'boolean',
+  enumerable: 'boolean',
+  writable: 'boolean'
+};
+
+function isDataDescriptor(obj) {
+  if (typeOf(obj) !== 'object') {
+    return false;
+  }
+
+  var dataKeys = Object.keys(data);
+  var keys = getKeys(obj);
+
+  if (obj.hasOwnProperty('value')) {
+    if (diff(keys, dataKeys).length !== 1) {
+      return false;
+    }
+    for (var key in obj) {
+      if (key === 'value') continue;
+      if (typeOf(obj[key]) !== data[key]) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+/**
+ * Get object keys. `Object.keys()` only gets
+ * enumerable properties.
+ */
+
+function getKeys(obj) {
+  var keys = [];
+  for (var key in obj) keys.push(key);
+  return keys;
+}
+
+/**
+ * Expose `isDataDescriptor`
+ */
+
+module.exports = isDataDescriptor;

package.json

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+{
+  "name": "is-data-descriptor",
+  "description": "Returns true if a value appears to be a valid JavaScript data descriptor.",
+  "version": "0.1.0",
+  "homepage": "https://github.com/jonschlinkert/is-data-descriptor",
+  "author": "Jon Schlinkert (https://github.com/jonschlinkert)",
+  "repository": "jonschlinkert/is-data-descriptor",
+  "bugs": {
+    "url": "https://github.com/jonschlinkert/is-data-descriptor/issues"
+  },
+  "license": "MIT",
+  "files": [
+    "index.js"
+  ],
+  "main": "index.js",
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "scripts": {
+    "test": "mocha"
+  },
+  "dependencies": {
+    "arr-diff": "^1.1.0",
+    "kind-of": "^2.0.1"
+  },
+  "devDependencies": {
+    "mocha": "*",
+    "should": "*"
+  },
+  "keywords": []
+}

test.js

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+'use strict';
+
+/* deps: mocha */
+var assert = require('assert');
+var should = require('should');
+var isDescriptor = require('./');
+var noop = function(){};
+
+describe('isDescriptor', function () {
+  describe('value type', function () {
+    it('should be false when not an object:', function () {
+      assert(!isDescriptor('a'));
+      assert(!isDescriptor(null));
+      assert(!isDescriptor([]));
+    });
+  });
+
+  describe('data descriptor:', function () {
+    it('should be false when the object has invalid properties:', function () {
+      assert(!isDescriptor({value: 'foo', bar: 'baz'}));
+      assert(!isDescriptor({value: 'foo', bar: 'baz'}));
+      assert(!isDescriptor({value: 'foo', get: noop}));
+      assert(!isDescriptor({get: noop, value: noop}));
+    });
+
+    it('should be true when the object has valid properties:', function () {
+      assert(isDescriptor({value: 'foo'}));
+      assert(isDescriptor({value: noop}));
+    });
+
+    it('should be false when a value is not the correct type:', function () {
+      assert(!isDescriptor({value: 'foo', enumerable: 'foo'}));
+      assert(!isDescriptor({value: 'foo', configurable: 'foo'}));
+      assert(!isDescriptor({value: 'foo', writable: 'foo'}));
+    });
+  });
+});