Here is one way to implement tests for our Character class in the previous exercise using Asymmetric Matchers.

import { describe, it, expect } from 'vitest';
import { Character } from './character.js';
import { Person } from './person.js';

describe('Character', () => {
  it('should create a character with a first name, last name, and role', () => {
    const character = new Character('Ada', 'Lovelace', 'Computer Scientist');

    expect(character).toEqual({
      id: expect.any(String),
      firstName: 'Ada',
      lastName: 'Lovelace',
      role: 'Computer Scientist',
      level: 1,
      strength: expect.any(Number),
      dexterity: expect.any(Number),
      intelligence: expect.any(Number),
      wisdom: expect.any(Number),
      charisma: expect.any(Number),
      constitution: expect.any(Number),
      createdAt: expect.any(Date),
      lastModified: expect.any(Date),
    });
  });

  it('should allow you to increase the level', () => {
    const character = new Character('Ada', 'Lovelace', 'Computer Scientist');

    character.levelUp();
    expect(character.level).toBe(2);
  });

  it('should update the last modified date when leveling up', () => {
    const character = new Character('Ada', 'Lovelace', 'Computer Scientist');

    const initialLastModified = character.lastModified;

    character.levelUp();

    expect(character.lastModified).not.toBe(initialLastModified);
  });

  // Bonus: Test that Character inherits from Person
  it('should inherit from Person', () => {
    const character = new Character('Ada', 'Lovelace', 'Computer Scientist');

    expect(character).toBeInstanceOf(Person);
  });
});