Editing Card Amounts

handleCardAddition.test.js

describe('#handleCardAddition', () => {
  let cards;
  let editingDecklistCards;

  const handleCardAddition = value => {
    const cardToAdd = cards.allCards.find(c => c.name === value);

    // Check to see if the card exists, if it does then add it.
    if (editingDecklistCards.hasOwnProperty(cardToAdd.cardId)) {
      cardToAdd.amount = 2;
      editingDecklistCards[cardToAdd.cardId].amount = 2;
    } else {
      cardToAdd.amount = 1;
      editingDecklistCards[cardToAdd.cardId] = cardId;
    }
  };

  beforeEach(() => {
    cards = {
      allCards: [
        { cardId: 'card1', name: 'test card 1', amount: 1 },
        { cardId: 'card2', name: 'test card 2', amount: 1 },
        { cardId: 'card3', name: 'test card 3', amount: 0 },
      ],
    };

    editingDecklistCards = {
      card1: { cardId: 'card1', name: 'test card 1', amount: 1 },
      card2: { cardId: 'card2', name: 'test card 2', amount: 2 },
    };
  });

  test('adding an existing card increments amounts to 2', () => {
    handleCardAddition('test card 1');
    expect(cards.allCards[0]).toHaveProperty('amount', 2);
    expect(editingDecklistCards.card1.amount).toBe(2);
  });

  test('adding an existing card does not increment other cards', () => {
    handleCardAddition('test card 1');
    expect(cards.allCards[1]).toHaveProperty('amount', 0);
    expect(cards.allCards[2]).toHaveProperty('amount', 0);
    expect(editingDecklistCards.card2.amount).toBe(0);
    expect(editingDecklistCards.card3).toBeUndefined();
  });
});