chai-common

Chai.js plugin containing commonly used custom assertions

Chai Common

Chai.js plugin containing commonly used custom assertions.

Install

npm install chai-common

Usage

var chai = require('chai'),
    chaiCommon = require('chai-common'),
    expect = chai.expect;
 
// Register this plugin 
chai.use(chaiCommon);
 
// Use the new 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