Cookbook

const user = Forger.createWith<User>() .with(u => u.id = 42) .result()!; service.register(user); expect(service.findById(42)).toEqual(user);

const expectedName = Forger.create<string>()!; const dto = Forger.createWith<UserDto>() .with(d => d.name = expectedName) .result()!; expect(mapper(dto).displayName).toBe(expectedName);

const top = Forger.create<Player[]>({ arrayLength: 10 })!; expect(top).toHaveLength(10);

const weekAgo = Date.now() - 7 * 24 * 3600 * 1000; const event = Forger.create<Event>({ dateMin: new Date(weekAgo), dateMax: new Date(), })!;

const qty = Forger.create<number>({ numberMin: 1, numberMax: 9 })!;

const code = Forger.create<string>({ stringLength: 8, stringSpecial: false, })!; // 'kW9pLm3t' — letters and digits only

type Result = { ok: true; value: string } | { ok: false; error: string }; const failure = Forger.createWith<Result>() .with(r => r.ok = false) .with(r => r.error = 'NETWORK') .result()!;

const cache = new Map<string, number>(); const repo = Forger.createWith<UserRepository>() .with(r => r.cache = cache) .result()!; repo.save(user); // writes through to the real map expect(cache.get(user.id)).toBeDefined();

const api = Forger.createWith<AuthApi>() .with(a => a.login = jest.fn().mockResolvedValue({ token: 't' })) .result()!;

const leaf = Forger.create<TreeNode>()!; const root = Forger.createWith<TreeNode>() .with(t => t.children = [leaf, leaf]) .result()!; expect(countNodes(root)).toBe(3);

interface Meter { value: number; history: number[] } const meter = Forger.create<Meter>({ numberMin: 0, numberMax: 100, arrayLength: 5 })!; // value in [0, 100]; history: 5 numbers, each in [0, 100]