General nodejs unit test template. Uses mocha, sinon, proxyquire, chai, and is-deep-frozen.

unit.test.js

'use strict';

const ROOT_PATH = '../../';

const MODULE_PATH = 'lib/filename';

const FULL_MODULE_PATH = ROOT_PATH + MODULE_PATH;

const isDeepFrozen = require( 'is-deep-frozen' );

const expect = require( 'chai' ).expect;

const proxyquire = require( 'proxyquire' ).noCallThru();

const sinon = require( 'sinon' );


describe( MODULE_PATH, function() {

    let getMonkeyStub;

    let feedMonkeyStub;

    function getModule( values ) {

        // s1
        getMonkeyStub = sinon.stub().returns( values.getMonkey );

        // s2
        feedMonkeyStub = sinon.stub().returns( values.feedMonkey );

        const proxyquireStubs = {

            '../../get_monkey': getMonkeyStub,
            '../../feed_monkey': feedMonkeyStub,
        };

        return proxyquire( FULL_MODULE_PATH, proxyquireStubs );
    }

    it( 'normal operation', function() {

        const module = getModule({

            getMonkey: Promise.resolve({

                getMonkeyContents: true
            }),

            feedMonkey: {

                feedMonkeyContents: true
            }
        });

        expect( isDeepFrozen( module ) ).eql( {} ); // indicates is deeply frozen

        // run module command(s) here

        // s1
        expect( getMonkeyStub.args.length ).equal( 0 );

        // s2
        expect( feedMonkeyStub.args.length ).equal( 0 );
    });
});