tests.js

var test = require('tape');

var tarot = require('../tarot-deck');

test('Tarot Deck', function (t) {
  t.plan(2);
  t.ok(tarot.tarotDeck, 'tarot deck exists');
  t.equal(tarot.tarotDeck.length, 78, 'tarot deck has 78 cards');
});

test('Major Arcana', function (t) {
  t.plan(2);
  t.ok(tarot.majorArcana, 'Major Arcana available');
  t.equal(tarot.majorArcana.length, 22, 'Major Arcana has 22 cards');
});

test('Minor Arcana', function (t) {
  t.plan(2);
  t.ok(tarot.minorArcana, 'Minor Arcana available');
  t.equal(tarot.minorArcana.length, 56, 'Minor Arcana has 56 cards');
});

test('Suits', function (t) {
  t.plan(6);
  t.equal(tarot.suits.length, 5, 'There exist 5 suits');
  [ 'major', 'wands', 'cups', 'swords', 'coins' ].forEach(function (suit) {
    t.assert(tarot.suits.indexOf(suit) != -1, 'The `' + suit + '` suit is available');
  });
});

test('Draw a single card', function (t) {
  t.plan(1);
  t.assert(tarot.tarotDeck.indexOf(tarot.drawCard(tarot.tarotDeck) ) != -1, 'Able to draw random cards from the deck');
});

test('Drawing a tarot reading', function (t) {
  var fullReading = tarot.drawReading(tarot.tarotDeck.length),
    uniqueReading = [ ...new Set(fullReading) ],
    tarotDeckCopy = tarot.tarotDeck.slice(),
    cardsDrawnFromCopy = tarot.drawReading(3, tarotDeckCopy);

  t.plan(4);
  t.assert(tarot.drawReading().length === 3, 'Readings default to 3 cards ');

  t.assert(fullReading.length === uniqueReading.length , 'All cards drawn in a reading are unique');
  t.assert(tarot.drawReading(tarot.tarotDeck.length + 1).length === tarot.tarotDeck.length,
    'Drawing more cards than are in a deck results in a return equal to deck size');

  t.assert(
     cardsDrawnFromCopy.reduce((previousValue, currentValue) => { return previousValue * (tarotDeckCopy.indexOf(currentValue) != -1 );  }, true),
    'Drawing a reading does not modify a deck provided as an argument');
});