import { sortByDateAscending, sortByNumberAscending, sortByStringAscending } from './sorting.service';

describe('SortingService', () => {

  it('should sort correctly by number', () => {
    const items = [7, 3, 2, 6, 4, 8, 0];
    sortByNumberAscending(items, x => x);
    expect(items).toEqual([0, 2, 3, 4, 6, 7, 8]);
  });

  it('should sort strings by length correctly', () => {
    const items = ['aaaaa', 'a', 'aaa'];
    sortByNumberAscending(items, x => x.length);
    expect(items).toEqual(['a', 'aaa', 'aaaaa']);
  });

  it('should sort strings alphanumerically', () => {
    const items = ['biz', 'bar', 'foo'];
    sortByStringAscending(items, x => x);
    expect(items).toEqual(['bar', 'biz', 'foo']);
  });

  it('should sort dates correctly', () => {
    const items = [
      new Date(2020, 2, 10, 13, 30),
      new Date(2020, 2, 10, 12, 30),
      new Date(2019, 4, 4),
      new Date(2020, 2, 11, 13, 30),
    ];
    sortByDateAscending(items, x => x);
    expect(items).toEqual([
      new Date(2019, 4, 4),
      new Date(2020, 2, 10, 12, 30),
      new Date(2020, 2, 10, 13, 30),
      new Date(2020, 2, 11, 13, 30),
    ]);
  });

});