chai-date-string

Usage example: ``` javascript var chai = require(‘chai’) , expect = chai.expect , chaiDateString = require(‘chai-date-string’);

expect(‘2015-11-12’).to.be.a.dateString(); // will pass expect(‘2015-24-12’).to.be.a.dateString(); // will fail ```

It will validate time part as well.

The later will fail with message: `AssertionError: expected ‘2015-24-12’ to be a date string.