const assert = require('assert');
const chai = require('chai');

// use the expect assertion style from the chai module
const expect = chai.expect;

// start our app
const app = require('../app');

// make sure our test framework Mocha is working as expected
	// describe is used to group unit tests that are related to each other under one test suite

describe('Array', ()=>{
	describe('indexOf()', ()=>{
		// 'it' is a single unit test
		it('should return -1 when the given value is not in the array',()=>{
			//  in a unit test, assertions will be written to tell Mocha what should happen in order for the test to pass

			assert.equal([1,2,3].indexOf(4), -1 )

		});
	});
});

// test the existence of our application
describe('App',()=>{
	it('should exist', ()=>{
		expect(app).to.be.a('function');
	});
});