Challenge — Vehicle Fleet Manager

Objective

Build a CLI tool that manages a vehicle fleet using OOP.

Class Hierarchy

abstract class Vehicle {
  abstract fuelType: string;
  abstract maxSpeed: number;
  constructor(public id: string, public make: string, public model: string, public year: number) {}
  abstract describe(): string;
  abstract startEngine(): string;
}

class Car extends Vehicle { fuelType = 'gasoline'; maxSpeed = 150; /* ... */ }
class Truck extends Vehicle { fuelType = 'diesel'; maxSpeed = 90; /* ... */ }
class ElectricCar extends Car { fuelType = 'electric'; /* ... */ }
class Motorbike extends Vehicle { fuelType = 'gasoline'; maxSpeed = 200; /* ... */ }

Requirements

• 4 vehicle types (Car, Truck, ElectricCar, Motorbike) using inheritance
• FleetManager class to add/remove/list vehicles
• CLI interface using inquirer
• Vitest test suite: at least 10 tests
• TypeScript strict mode

Grading

Criteria	Points
Class hierarchy with TypeScript	30
FleetManager with CRUD	20
Inquirer CLI	20
10+ passing Vitest tests	30
Total	100