I'm actually pretty proud of myself for finishing this

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

@@ -3,64 +3,111 @@ package com.zipcodewilmington.gildedrose;
 
 public class Inventory {
     private Item[] items;
+    static final String Aged = "Aged Brie";
+    static final String Backstage = "Backstage passes to a TAFKAL80ETC concert";
+    static final String Sulf = "Sulfuras,Hand of Ragnaros";
+    static final String Conj = "Conjured";
 
     public Inventory(Item[] items) {
         super();
         this.items = items;
     }
 
+    public void refactor() {
 
-    public void updateQuality() {
         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].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].setSellIn(items[i].getSellIn() - 1);
+            switch (items[i].getName()) {
+
+                case Aged:
+                    increaseQuality(items[i]);
+                    under6days(items[i]);
+                    expireditems(items[i]);
+                    sulferus_Deduction(items[i]);
+
+                    break;
+
+                case Backstage:
+                    increaseQuality(items[i]);
+                    extramoneyfortheconcert(items[i]);
+                    sulferus_Deduction(items[i]);
+                    expireditems(items[i]);
+                    break;
+
+                case Sulf:
+                    increaseQuality(items[i]);
+                    under6days(items[i]);
+                    expireditems(items[i]);
+                    break;
+
+
+                case Conj:
+
+                    notFromTheOriginalList(items[i]);
+                    sulferus_Deduction(items[i]);
+
+                    break;
+
+                    default:
+
+                        notFromTheOriginalList(items[i]);
+                        sulferus_Deduction(items[i]);
             }
+        }
+    }
+
+
+    public void increaseQuality(Item item){
+
+        if(item.getQuality() < 50 ){
+            item.setQuality(item.getQuality()+1);
+
+        }
+    }
+    public void expireditems(Item item){
+
+        if(item.getSellIn()< 0) {
+            item.setQuality(0);
+        }
+
+    }
+    public void under6days(Item item){
+
+        if(item.getSellIn()<6 && item.getQuality()<50){
+
+            item.setQuality(item.getQuality()+1);
+        }
+
+    }
+
+    public void extramoneyfortheconcert(Item item){
+
+        if(item.getSellIn()<11 && item.getQuality()<50){
+
+            item.setQuality(item.getQuality()+1);
+
+        }
+
+    }
+    public void sulferus_Deduction(Item item){
+
+        if(!Sulf.equals(item)){
+
+            item.setSellIn(item.getSellIn()-1);
+
+        }
+    }
+
+    public void notFromTheOriginalList(Item item){
+
+            if(!item.equals(Sulf)&&!item.equals(Aged)&&!item.equals(Backstage)){
+
+                item.setQuality(item.getQuality()-2);
 
-            if (items[i].getSellIn() < 0) {
-                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

@@ -6,7 +6,88 @@ import org.junit.Test;
 public class InventoryTest {
     @Test
     public void updateQuantityTest(){
-        Assert.assertEquals(1, 1);
+
+        Item item = new Item("Aged Brie",4,10);
+        Item[] items = {item};
+
+
+        Assert.assertEquals(18, item.getQuality());
+    }
+    @Test
+    public void UpdatingQualities() {
+        Item backstagePass = new Item("Backstage passes to a TAFKAL80ETC concert", -1, 30);
+        Item arr[] = new Item[1];
+        arr[0] = backstagePass;
+        Inventory inventory = new Inventory(arr);
+        int expectedOutput = 0;
+
+        //when
+        inventory.refactor();
+        int actualOutput = backstagePass.getQuality();
+
+        //then
+        Assert.assertEquals(expectedOutput, actualOutput);
+               }
+    @Test
+    public void UpdatingQualities2() {
+        Item aged = new Item("aged", -1, 9);
+        Item arr[] = new Item[1];
+        arr[0] = aged;
+        Inventory inventory = new Inventory(arr);
+        int expectedOutput = 0;
+
+        //when
+        inventory.refactor();
+        int actualOutput = aged.getQuality();
+
+        //then
+        Assert.assertEquals(expectedOutput, actualOutput);
     }
+    @Test
+    public void UpdatingSelldates() {
+        Item concert = new Item("Backstage passes to a TAFKAL80ETC concert", 10, 9);
+        Item arr[] = new Item[1];
+        arr[0] = concert;
+        Inventory inventory = new Inventory(arr);
+        int expectedOutput = 9;
+
+        //when
+        inventory.refactor();
+        int actualOutput = concert.getSellIn();
+
+        //then
+        Assert.assertEquals(expectedOutput, actualOutput);
+    }
+    @Test
+    public void Notfromtheoriginallist() {
+        Item apple = new Item("apple", -1, 9);
+        Item arr[] = new Item[1];
+        arr[0] = apple;
+        Inventory inventory = new Inventory(arr);
+        int expectedOutput = 0;
+
+        //when
+        inventory.refactor();
+        int actualOutput = apple.getQuality();
+
+        //then
+        Assert.assertEquals(expectedOutput, actualOutput);
+    }
+    @Test
+    public void Notfromtheoriginallist2() {
+        Item apple = new Item("Conjured", 10, 90);
+        Item arr[] = new Item[1];
+        arr[0] = apple;
+        Inventory inventory = new Inventory(arr);
+        int expectedOutput = 88;
+
+        //when
+        inventory.refactor();
+        int actualOutput = apple.getQuality();
+
+        //then
+        Assert.assertEquals(expectedOutput, actualOutput);
+    }
+
 }