| # AssertionError [](https://travis-ci.org/chaijs/assertion-error) | |
| > Error constructor for test and validation frameworks that implements standardized AssertionError specification. | |
| ## Installation | |
| ### Node.js | |
| `assertion-error` is available on [npm](http://npmjs.org). | |
| $ npm install assertion-error | |
| ### Component | |
| `assertion-error` is available as a [component](https://github.com/component/component). | |
| $ component install chaijs/assertion-error | |
| ## License | |
| (The MIT License) | |
| Copyright (c) 2013 Jake Luer <jake@qualiancy.com> (http://qualiancy.com) | |
| 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. | |