Building a Helper
Building a Helper
This tutorial assumes that you are familiar with the plugin core concepts. If you have not yet read that article, it is recommended that you do so before continuing.
Providing chainable helper assertions is the most common use of the plugin utilities that Chai exposes. Before we get into the basics, we are going to need a topic for which we will extend Chai’s assertions to comprehend. For this, we will be using a very minimal data model object.
/**
* # Model
*
* A constructor for a simple data model
* object. Has a `type` and contains arbitrary
* attributes.
*
* @param {String} type
*/
function Model (type) {
this._type = type;
this._attrs = {};
}
/**
* .set (key, value)
*
* Set an attribute to be stored in this model.
*
* @pa
