import { TestBed } from '@automock/jest';
import { Inject, Injectable } from '@nestjs/common';
import { v4 } from 'uuid';

@Injectable()
export class IdGenerator<T extends string> {
  generate(): T {
    return v4() as T;
  }
}

export type IdFor<T extends string> = string & T;

type FirstEntityId = IdFor<'FirstEntity'>;
type SecondEntityId = IdFor<'SecondEntity'>;

@Injectable()
class Hello {
  say(): void {
    console.log('hello');
  }
}

@Injectable()
export class FirstService {
  constructor(
    private readonly idFirstGenerator: IdGenerator<FirstEntityId>,
    private readonly idSecondGenerator: IdGenerator<SecondEntityId>,
    private readonly hello: Hello,
  ) {}

  async foo(): Promise<void> {
    console.log(this);
    this.hello.say();
  }
}

@Injectable()
export class SecondService {
  constructor(
    private readonly idFirstGenerator: IdGenerator<FirstEntityId>,
    private readonly hello: Hello,
  ) {}

  async foo(): Promise<void> {
    console.log(this);

    this.hello.say();
  }
}

it('foo 1', async () => {
  const { unit, unitRef } = TestBed.create(FirstService).compile();

  const helloModule = unitRef.get(Hello);
  const spy = jest.spyOn(helloModule, 'say');

  await unit.foo();

  expect(spy).toBeCalledTimes(1);
});

it('foo 2', async () => {
  const { unit, unitRef } = TestBed.create(SecondService).compile();

  const helloModule = unitRef.get(Hello);
  const spy = jest.spyOn(helloModule, 'say');

  await unit.foo();

  expect(spy).toBeCalledTimes(1);
});