gilded_rose_test.py

from item import Item
from gilded_rose import GildedRose

from unittest import TestCase, skip

gilded_rose = GildedRose()


class GildedRoseTest(TestCase):

    def setUp(self):
        self.items = []

    def test_regular_items_decrease_by_one(self):
        self.items.append(Item("+5 Dexterity Vest", 10, 20))
        gilded_rose.update_quality(self.items)
        expected = {'sell_in': 9, 'quality': 19}
        item = self.items[0]
        self.assertEqual(item.quality, expected['quality'])
        self.assertEqual(item.sell_in, expected['sell_in'])

    def test_quality_goes_up_for_improving_products(self):
        self.items.append(Item("Aged Brie", 20, 30))
        self.items.append(Item("Backstage passes to a TAFKAL80ETC concert", 20, 30))
        gilded_rose.update_quality(self.items)
        expected = [
              {'sell_in': 19, 'quality': 31},
              {'sell_in': 19, 'quality': 31},
            ]

        for index, expectation in enumerate(expected):
            item = self.items[index]
            self.assertEqual(item.quality, expectation['quality'])
            self.assertEqual(item.sell_in, expectation['sell_in'])

    def test_quality_goes_up_by_two_for_improving_products_with_10_days_or_less_left(self):
        self.items.append(Item("Aged Brie", 10, 34))
        self.items.append(Item("Backstage passes to a TAFKAL80ETC concert", 8, 30))
        gilded_rose.update_quality(self.items)
        expected = [
            {'sell_in': 9, 'quality': 36},
            {'sell_in': 7, 'quality': 32},
        ]

        for index, expectation in enumerate(expected):
            item = self.items[index]
            self.assertEqual(item.quality, expectation['quality'])
            self.assertEqual(item.sell_in, expectation['sell_in'])

    def test_quality_goes_up_by_three_for_improving_products_with_5_days_or_less_left(self):
        self.items.append(Item("Aged Brie", 4, 11))
        self.items.append(Item("Backstage passes to a TAFKAL80ETC concert", 5, 15))
        gilded_rose.update_quality(self.items)
        expected = [
            {'sell_in': 3, 'quality': 14},
            {'sell_in': 4, 'quality': 18},
        ]

        for index, expectation in enumerate(expected):
            item = self.items[index]
            self.assertEqual(item.quality, expectation['quality'])
            self.assertEqual(item.sell_in, expectation['sell_in'])

    def test_quality_and_sellin_decrease_twice_as_fast_after_sell_by(self):
        self.items.append(Item("+5 Dexterity Vest", 0, 20))
        self.items.append(Item("Conjured Mana Cake", 0, 6))
        gilded_rose.update_quality(self.items)
        expected = [
            {'sell_in': -1, 'quality': 18},
            {'sell_in': -1, 'quality': 4},
        ]

        for index, expectation in enumerate(expected):
            item = self.items[index]
            self.assertEqual(item.quality, expectation['quality'])
            self.assertEqual(item.sell_in, expectation['sell_in'])

    def test_backstage_passes_and_brie_go_to_quality_zero_after_sell_by(self):
        self.items.append(Item("Aged Brie", 0, 20))
        self.items.append(Item("Backstage passes to a TAFKAL80ETC concert", 0, 20))
        gilded_rose.update_quality(self.items)
        expected = [
            {'sell_in': -1, 'quality': 0},
            {'sell_in': -1, 'quality': 0},
        ]

        for index, expectation in enumerate(expected):
            item = self.items[index]
            self.assertEqual(item.quality, expectation['quality'])
            self.assertEqual(item.sell_in, expectation['sell_in'])

    def test_sulfuras_the_immutable(self):
        self.items.append(Item("Sulfuras, Hand of Ragnaros", 0, 80))
        gilded_rose.update_quality(self.items)
        expected = {'sell_in': 0, 'quality': 80}
        item = self.items[0]
        self.assertEqual(item.quality, expected['quality'])
        self.assertEqual(item.sell_in, expected['sell_in'])

    def test_quality_does_not_increase_past_50(self):
        self.items.append(Item("Aged Brie", 4, 49))
        gilded_rose.update_quality(self.items)
        expected = {'sell_in': 3, 'quality': 50}
        item = self.items[0]
        self.assertEqual(item.quality, expected['quality'])
        self.assertEqual(item.sell_in, expected['sell_in'])

    @skip
    def test_conjured_items_decrease_in_quality_twice_as_fast(self):
        self.items.append(Item("Conjured Mana Cake", 3, 6))
        gilded_rose.update_quality(self.items)
        expected = {'sell_in': 2, 'quality': 2}
        item = self.items[0]
        self.assertEqual(item.quality, expected['quality'])
        self.assertEqual(item.sell_in, expected['sell_in'])