code coverage improvement

python/tests/test_gilded_rose.py

@@ -18,5 +18,78 @@ class GildedRoseTest(unittest.TestCase):
         self.assertEqual(0, items[0].quality)
 
         
+class GildedRoseFullCoverageTest(unittest.TestCase):
+    def test_aged_brie_increases_quality(self):
+        items = [Item("Aged Brie", 2, 0)]
+        gr = GildedRose(items)
+        gr.update_quality()
+        self.assertEqual(1, items[0].quality)
+        self.assertEqual(1, items[0].sell_in)
+
+    def test_aged_brie_max_quality(self):
+        items = [Item("Aged Brie", 2, 50)]
+        gr = GildedRose(items)
+        gr.update_quality()
+        self.assertEqual(50, items[0].quality)
+
+    def test_sulfuras_never_changes(self):
+        items = [Item("Sulfuras, Hand of Ragnaros", 0, 80)]
+        gr = GildedRose(items)
+        gr.update_quality()
+        self.assertEqual(80, items[0].quality)
+        self.assertEqual(0, items[0].sell_in)
+
+    def test_backstage_passes_increase(self):
+        items = [Item("Backstage passes to a TAFKAL80ETC concert", 15, 20)]
+        gr = GildedRose(items)
+        gr.update_quality()
+        self.assertEqual(21, items[0].quality)
+        items[0].sell_in = 10
+        items[0].quality = 20
+        gr.update_quality()
+        self.assertEqual(22, items[0].quality)
+        items[0].sell_in = 5
+        items[0].quality = 20
+        gr.update_quality()
+        self.assertEqual(23, items[0].quality)
+
+    def test_backstage_passes_zero_after_concert(self):
+        items = [Item("Backstage passes to a TAFKAL80ETC concert", 0, 20)]
+        gr = GildedRose(items)
+        gr.update_quality()
+        self.assertEqual(0, items[0].quality)
+
+    def test_conjured_degrades_twice(self):
+        items = [Item("Conjured Mana Cake", 3, 6)]
+        gr = GildedRose(items)
+        gr.update_quality()
+        self.assertEqual(4, items[0].quality)
+        items[0].sell_in = 0
+        items[0].quality = 6
+        gr.update_quality()
+        self.assertEqual(2, items[0].quality)
+
+    def test_quality_never_negative(self):
+        items = [Item("foo", 0, 0)]
+        gr = GildedRose(items)
+        gr.update_quality()
+        self.assertGreaterEqual(items[0].quality, 0)
+
+    def test_quality_never_above_50(self):
+        items = [Item("Aged Brie", 2, 50)]
+        gr = GildedRose(items)
+        gr.update_quality()
+        self.assertLessEqual(items[0].quality, 50)
+
+    def test_normal_item_degrades(self):
+        items = [Item("Normal Item", 1, 10)]
+        gr = GildedRose(items)
+        gr.update_quality()
+        self.assertEqual(9, items[0].quality)
+        self.assertEqual(0, items[0].sell_in)
+        gr.update_quality()
+        self.assertEqual(7, items[0].quality)
+
+
 if __name__ == '__main__':
     unittest.main()