import { range, zip } from './collections';

// Type assertions, these will lint if the types are wrong.
const _zip1: [string, number] = zip(['a'], [1])[0];

describe('range', () => {
  test('range(0, 5)', () => {
    expect(range(0, 5)).toEqual([0, 1, 2, 3, 4]);
  });
});

describe('zip', () => {
  test("zip(['a', 'b', 'c'], [1, 2, 3, 4])", () => {
    expect(zip(['a', 'b', 'c'], [1, 2, 3, 4])).toEqual([
      ['a', 1],
      ['b', 2],
      ['c', 3],
    ]);
  });
});