ts-prime/src/sortBy.test.ts

A utility library for JavaScript and Typescript.

import { sortBy } from './sortBy';
import { pipe } from './pipe';

const items = [{ a: 1 }, { a: 3 }, { a: 7 }, { a: 2 }] as const;
const sorted = [{ a: 1 }, { a: 2 }, { a: 3 }, { a: 7 }];

const multiPropSortItems = [
  { favorite: false, category: 'A' },
  { favorite: true, category: 'C' },
  { favorite: true, category: 'B' },
  { favorite: false, category: 'B' },
];

// Expect favorites sorted alphabetically
const multiPropSortItemsSorted = [
  { favorite: true, category: 'B' },
  { favorite: true, category: 'C' },
  { favorite: false, category: 'A' },
  { favorite: false, category: 'B' },
];

const withLocaleComparison = [
  { category: 'Garden' },
  { category: 'cleaning' },
  { category: 'books' },
  { category: 'books' },
  { category: 'Tech' },
  { category: 'Cooking' },
];

const sortedWithLocaleComparison = [
  { category: 'books' },
  { category: 'books' },
  { category: 'cleaning' },
  { category: 'Cooking' },
  { category: 'Garden' },
  { category: 'Tech' },
];

describe('data first', () => {
  test('sort correctly', () => {
    expect(sortBy(items, x => x.a)).toEqual(sorted);
  });
  test('sort with multi keys', () => {
    expect(
      sortBy(multiPropSortItems, x => [
        { value: x.favorite, order: 'desc' },
        x.category,
      ])
    ).toEqual(multiPropSortItemsSorted);
  });
  test('sort with multi keys', () => {
    expect(
      sortBy(withLocaleComparison, x => [
        {
          value: x.category,
          compare: (a, b) => a.toString().localeCompare(b.toString()),
        },
        x.category,
      ])
    ).toEqual(sortedWithLocaleComparison);
  });
});

xdescribe('data last', () => {
  test('sort correctly', () => {
    expect(
      pipe(
        items,
        sortBy(x => x.a)
      )
    ).toEqual(sorted);
  });

  test('sort multi objects correctly', () => {
    expect(
      pipe(
        items,
        sortBy(x => x.a)
      )
    ).toEqual(sorted);
  });
});