chai-common

Chai.js plugin containing commonly used custom assertions

Chai Common

Commonly used Chai.js custom assertions.

Install

npm install chai-common

Usage

This module exports a function that, when called, adds the included assertions to the prototype of Chai's assertion objects.

var expect = require('chai').expect;
require('chai-common')();
 
// Use the assertions 
expect([1, 2, 3]).to.startWith(1);

Included Assertions

This package contains the following assertions.

  1. containAtIndex(target, idx)

    Supports strings, arrays, and other objects supporting the indexOf() method.

    If the subject supports the length property, this assertion also supports negative indices, where -1 means the last element, -2 means the one before the last, etc.

  2. startWith(target)

    Supports strings, arrays, and other objects supporting the indexOf() method.

    This is an alias of containAtIndex(target, 0).

  3. endWith(target)

    Supports strings, arrays, and other objects supporting both the indexOf() method and the length property.

    For strings, this is an alias of containAtIndex(target, -target.length); otherwise, this is an alias of containAtIndex(target, -1).

License

MIT License