GildedRose-Refactoring-Kata/js-jest/test/gilded_rose.test.js

const { Shop, Item } = require('../src/gilded_rose');

// describe('Gilded Rose', function () {
//   it('should foo', function () {
//     const gildedRose = new Shop([
//       new Item('Backstage passes to a TAFKAL80ETC concert', 0, 0),
//     ]);
//     const items = gildedRose.updateQuality();

//     expect(items[0].name).toBe('Backstage passes to a TAFKAL80ETC concert');
//     expect(items[0].sellIn).toBe(-1);
//   });
// });

// to test for Backstage passes to a TAFKAL80ETC concert

// arrange
// act
// assert

describe('Gilded Rose', function () {
  it('Backstage pass sellIn < 11 and quality < 50', function () {
    const sellIn = 10;
    const quality = 40;

    const gildedRose = new Shop([
      new Item('Backstage passes to a TAFKAL80ETC concert', sellIn, quality),
    ]);
    const items = gildedRose.updateQuality();

    expect(items[0].quality).toBe(42);
  });

  it('Backstage pass sellIn < 6 and quality < 50', function () {
    const sellIn = 5;
    const quality = 40;

    const gildedRose = new Shop([
      new Item('Backstage passes to a TAFKAL80ETC concert', sellIn, quality),
    ]);
    const items = gildedRose.updateQuality();

    expect(items[0].quality).toBe(43);
  });

  it('Backstage pass sellIn < 0 and quality > 50', function () {
    const sellIn = -1;
    const quality = 51;

    const gildedRose = new Shop([
      new Item('Backstage passes to a TAFKAL80ETC concert', sellIn, quality),
    ]);
    const items = gildedRose.updateQuality();

    expect(items[0].quality).toBe(0);
  });
});