chai-asserttype

a simple chai plugin for js type assertions

Installation

npm install chai-asserttype

Usage

plug-in

const chai = require('chai');
const asserttype = require('chai-asserttype');
chai.use(asserttype);

Number

Asserts that type of actual is Number.

expect(1).to.be.number();
expect(0).to.be.number();
expect(-1).to.be.number();
expect(63465789908753).to.be.number();
expect(27.11).to.be.number();

String

Asserts that type of actual is String.

expect('').to.be.string();
expect('foobar').to.be.string();

Boolean

Asserts that type of actual is Boolean.

expect(true).to.be.boolean();
expect(false).to.be.boolean();

Object

Asserts that type of actual is Object.

expect({}).to.be.object();

Array

Asserts that type of actual is Array.

expect([]).to.be.array();
expect([1, 2, 3]).to.be.array();

Date

Asserts that type of actual is date.

expect(new Date()).to.be.date();

Function

Asserts that type of actual is Function.

expect(() => true).to.be.function();