Finished Part 3: Add a new item

src/main/java/com/zipcodewilmington/gildedrose/Inventory.java

@@ -19,6 +19,14 @@ public class Inventory {
 
     public void updateQuality() {
         for (Item item : items) {
+
+            int minuend = 0;
+            int subtrahend;
+
+            if (item.getName().equals("Conjured")) {
+                minuend = item.getQuality();
+            }
+
             if (item.getQuality() < 50) {
                 switch (item.getName()) {
                     case "Aged Brie":
@@ -44,72 +52,19 @@ public class Inventory {
                         break;
                 }
             }
+
+            if (item.getName().equals("Conjured")) {
+                subtrahend = item.getQuality();
+                int qualityDifference = minuend - subtrahend;
+                if (qualityDifference > 0) {
+                    item.setQuality(item.getQuality() - qualityDifference);
+                }
+            }
+
             if (item.getQuality() < 0) {
                 item.setQuality(0);
             }
-//                    default:
-//                        if (item.getQuality() > 0)
-//                            if (item.getSellIn() < 0 && item.getQuality() > 1))
-//                                changeQuality(item, -1);
-//                            if (item.getSellIn() < 0 && item.getQuality() > 1)
-//                                changeQuality(item, -2);
-//                        break;
-//                }
-//            }
             updateSellIn(item);
         }
-
-
-//        for (int i = 0; i < items.length; i++) {
-//            if (!items[i].getName().equals("Aged Brie") && !items[i].getName().equals("Backstage passes to a TAFKAL80ETC concert")) {
-//                if (items[i].getQuality() > 0) {
-//                    if (!items[i].getName().equals("Sulfuras, Hand of Ragnaros")) {
-//                        items[i].setQuality(items[i].getQuality() - 1);
-//                    }
-//                }
-//            } else {
-//                if (items[i].getQuality() < 50 && !items[i].getName().equals("Backstage passes to a TAFKAL80ETC concert")) {
-//                    items[i].setQuality(items[i].getQuality() + 1);
-//
-////                    if (items[i].getName() == "Backstage passes to a TAFKAL80ETC concert") {
-////                        if (items[i].getSellIn() < 11) {
-////                            if (items[i].getQuality() < 50) {
-////                                items[i].setQuality(items[i].getQuality() + 1);
-////                            }
-////                        }
-////
-////                        if (items[i].getSellIn() < 6) {
-////                            if (items[i].getQuality() < 50) {
-////                                items[i].setQuality(items[i].getQuality() + 1);
-////                            }
-////                        }
-////                    }
-//                }
-//            }
-//
-//            if (!items[i].getName().equals("Sulfuras, Hand of Ragnaros") && !items[i].getName().equals("Backstage passes to a TAFKAL80ETC concert")) {
-//                items[i].setSellIn(items[i].getSellIn() - 1);
-//            }
-//
-//            if (items[i].getSellIn() < 0 && !items[i].getName().equals("Backstage passes to a TAFKAL80ETC concert")) {
-//                if (!items[i].getName().equals("Aged Brie")) {
-//                    if (!items[i].getName().equals("Backstage passes to a TAFKAL80ETC concert")) {
-//                        if (items[i].getQuality() > 0) {
-//                            if (!items[i].getName().equals("Sulfuras, Hand of Ragnaros")) {
-//                                items[i].setQuality(items[i].getQuality() - 1);
-//                            }
-//                        }
-//                    } else {
-//                        items[i].setQuality(items[i].getQuality()
-//                                - items[i].getQuality());
-//                    }
-//                }
-//////                else {
-////////                    if (items[i].getQuality() < 50) {
-////////                        items[i].setQuality(items[i].getQuality() + 1);
-//////                    }
-////                }
-//            }
-//        }
     }
 }

src/test/java/com/zipcodewilmington/gildedrose/InventoryTest.java

@@ -9,7 +9,8 @@ public class InventoryTest {
     Item agedBrie = new Item("Aged Brie",7,10);
     Item sulfuras = new Item("Sulfuras, Hand of Ragnaros", 7, 10);
     Item backstagePasses = new Item("Backstage passes to a TAFKAL80ETC concert", 14, 10);
-    Item[] items = {genericItem, agedBrie, sulfuras, backstagePasses};
+    Item conjured = new Item("Conjured", 7, 25);
+    Item[] items = {genericItem, agedBrie, sulfuras, backstagePasses, conjured};
 
     @Test
     public void updateQuality0() {
@@ -150,5 +151,47 @@ public class InventoryTest {
         Assert.assertTrue(testItem.getName().equals("Health Potion"));
     }
 
+    @Test
+    public void updateQuality8() {
+        Inventory inventory = new Inventory(items);
+
+        // test that conjured quality goes down by double each day
+        int beforeConjured = items[4].getQuality();
+        int beforeGeneric = items[0].getQuality();
+        inventory.updateQuality();
+        int afterConjured = items[4].getQuality();
+        int afterGeneric = items[0].getQuality();
+
+        int differenceConjured = beforeConjured - afterConjured;
+        int differenceGeneric = beforeGeneric - afterGeneric;
+
+//        System.out.println(before);
+//        System.out.println(after);
+
+        Assert.assertTrue(differenceConjured/2 == differenceGeneric);
+    }
+
+    @Test
+    public void updateQuality9() {
+        Inventory inventory = new Inventory(items);
+
+        // test that conjured quality goes down by double each day
+        int beforeConjured = items[4].getQuality();
+        int beforeGeneric = items[0].getQuality();
+        for (int i = 0; i < 5; i++) {
+            inventory.updateQuality();
+        }
+        int afterConjured = items[4].getQuality();
+        int afterGeneric = items[0].getQuality();
+
+        int differenceConjured = beforeConjured - afterConjured;
+        int differenceGeneric = beforeGeneric - afterGeneric;
+
+//        System.out.println(before);
+//        System.out.println(after);
+
+        Assert.assertTrue(differenceConjured/2 == differenceGeneric);
+    }
+
 }