I have function CarFactory, which produce cars and should change color of these cars.
const warehouse = require("./warehouse");
function CarFactory(power = 10) {
this.warehouse = warehouse;
this.produceCar = (color = "red", wheels = 4, engine = false) => {
if (power < 2) {
return null
} else {
let car = { "id": warehouse.nextIdentifier, "color": color, "wheels": wheels, "engine": engine }
warehouse.createdCars.push(car);
warehouse.nextIdentifier++;
}
}
this.addEnergyPower = (value = 0) => {
power += value;
}
this.changeCarColor = (num) => {
if (power < 1) {
return null
} else {
warehouse.createdCars[num].color = 'blue'
}
}
}
module.exports = CarFactory;
But Im getting error Cannot set properties of undefined(setting 'color'). If I hardcode 0 like this to: createdCars[0] it actually works for car indexed 0.
this is warehouse file
let warehouse = {
createdCars: [],
nextIdentifier: 0
};
module.exports = warehouse;
this is where jest tries to change color
for (let i = 0; i < myFactory.warehouse.createdCars.length; i += 2) {
let car = myFactory.warehouse.createdCars[i];
if (myFactory.changeCarColor(car) !== null) {} else {
if (energyBoosts.length > 0) {
myFactory.addEnergyPower(energyBoosts.shift());
i -= 2;
} else {
break
}
}
}
From what I can tell in the line if (myFactory.changeCarColor(car) !== null) {} else{ car would be { "id": warehouse.nextIdentifier, "color": color, "wheels": wheels, "engine": engine } but what it seems like you would want is the id. So change if (myFactory.changeCarColor(car) !== null) {} else{ to if (myFactory.changeCarColor(car.id) !== null) {} else{ and see if that works.
You have this.changeCarColor = (num) but appears you want to pass a car to that and then get the id? I have no idea what this is so I then fails here:
console.log(typeof energyBoosts); with "undefined" for energyBoosts
But that is the NEXT question not the one at hand.
let warehouse = {
createdCars: [],
nextIdentifier: 0
};
function CarFactory(power = 10) {
this.warehouse = warehouse;
this.produceCar = (color = "red", wheels = 4, engine = false) => {
// console.log("here");
if (power < 2) {
return null;
} else {
let car = {
"id": warehouse.nextIdentifier,
"color": color,
"wheels": wheels,
"engine": engine
};
warehouse.createdCars.push(car);
warehouse.nextIdentifier++;
}
}
this.addEnergyPower = (value = 0) => {
power += value;
}
this.changeCarColor = (car) => {
console.log(car.color, car.id, power);
if (power < 1) {
return null;
} else {
warehouse.createdCars[car.id].color = 'blue';
}
}
}
let myFactory = new CarFactory();
//console.log(myFactory);
for (let c = 0; c < 10; c++) {
//console.log(c);
myFactory.produceCar("red", 4, false);
}
//console.log("GO!", myFactory.warehouse);
for (let i = 1; i < myFactory.warehouse.createdCars.length; i += 2) {
//console.log(i);
let car = myFactory.warehouse.createdCars[i];
console.log("Car:", car);
if (myFactory.changeCarColor(car) == null) {
console.log(typeof energyBoosts);
if (energyBoosts.length > 0) {
myFactory.addEnergyPower(energyBoosts.shift());
i -= 2;
} else {
break;
}
}
}