import { resolveAfter } from './resolve_after';

describe('Resolve After', () => {

  test('it should throw if given 0', () => {

    expect(() => {

      resolveAfter(0);
    }).toThrow();
  });

  test('it should throw if given a negative number', () => {

    expect(() => {

      resolveAfter(-1);
    }).toThrow();
  });

  test('it should throw if given a negative number', () => {

    expect(() => {

      resolveAfter('lol');
    }).toThrow();
  });

  test('it should resolve after the specified number of times', () => {

    expect(() => {

      const { counter, resolveAfterThree } = resolveAfter(3);
      let resolved = false;

      resolveAfterThree.then(() => (resolved = true));
      counter();
      expect(resolved).toBe(false);
      counter();
      expect(resolved).toBe(false);
      counter();
      expect(resolved).toBe(true);
    }).toThrow();
  });
});