let assert = require('assert'); describe('Array', function() { describe('#indexOf()', function() { it('should return -1 when the value is not present', function() { assert.equal([1, 2, 3].indexOf(4), -1); }); });});
let assert = require('assert');
describe('Array', function() {
describe('#indexOf()', function() {
it('should return -1 when the value is not present', function() {
assert.equal([1, 2, 3].indexOf(4), -1);
});