diff --git a/Java/src/test/java/com/gildedrose/GildedRoseTest.java b/Java/src/test/java/com/gildedrose/GildedRoseTest.java
index 90939835..53a7c9ec 100644
--- a/Java/src/test/java/com/gildedrose/GildedRoseTest.java
+++ b/Java/src/test/java/com/gildedrose/GildedRoseTest.java
@@ -13,4 +13,103 @@ class GildedRoseTest {
         app.updateQuality();
         assertEquals("foo", app.items[0].name);
     }
+
+    @Test
+    void standardItems(){
+        Item[] items = new Item[]{
+            new Item("item1", 100, 100),
+            new Item("item2", 50, 50)
+        };
+        GildedRose app = new GildedRose(items);
+        app.updateQuality();
+        assertEquals(app.items[0].quality, 99);
+        assertEquals(app.items[1].quality, 49);
+        assertEquals(app.items[0].sellIn, 99);
+        assertEquals(app.items[1].sellIn, 49);
+    }
+
+    @Test
+    void qualityDegradationForExpired(){
+        Item[] items = new Item[]{new Item("item1", 0, 100)};
+        GildedRose app = new GildedRose(items);
+        app.updateQuality();
+        assertEquals(app.items[0].quality, 98);
+    }
+
+    @Test
+    void neverNegative(){
+        Item[] items = new Item[]{
+            new Item("item1", 0, 0),
+            new Item("item2", 10, 0),
+            new Item("item2", 0, 1),
+        };
+        GildedRose app = new GildedRose(items);
+        app.updateQuality();
+        assertEquals(app.items[0].quality, 0);
+        assertEquals(app.items[1].quality, 0);
+        assertEquals(app.items[2].quality, 0);
+    }
+
+    @Test
+    void agedBrieIncreasedValue(){
+        Item[] items = new Item[]{
+            new Item("Aged Brie", 9, 0),
+            new Item("Aged Brie", 0, 0)
+        };
+        GildedRose app = new GildedRose(items);
+        app.updateQuality();
+        assertEquals(app.items[0].quality, 1);
+        assertEquals(app.items[1].quality, 2);
+    }
+
+    @Test
+    void neverAbove50(){
+        Item[] items = new Item[]{
+            new Item("Aged Brie", 9, 50),
+            new Item("Aged Brie", 0, 50),
+            new Item("Aged Brie", 0, 49)
+        };
+        GildedRose app = new GildedRose(items);
+        app.updateQuality();
+        assertEquals(app.items[0].quality, 50);
+        assertEquals(app.items[1].quality, 50);
+        assertEquals(app.items[2].quality, 50);
+    }
+
+    @Test
+    void sulfurasNeverDecreases(){
+        //TODO: Sulfuras should be protected against instantiation with quality != 80
+        Item[] items = new Item[]{
+            new Item("Sulfuras, Hand of Ragnaros", 100, 80)
+        };
+        GildedRose app = new GildedRose(items);
+        app.updateQuality();
+        assertEquals(app.items[0].quality, 80);
+        assertEquals(app.items[0].sellIn, 100);
+    }
+
+    @Test
+    void backStagePassesIncrease() {
+        String backstage = "Backstage passes to a TAFKAL80ETC concert";
+        Item[] items = new Item[]{
+            new Item(backstage, 100, 0),
+            new Item(backstage, 11, 0),
+            new Item(backstage, 10, 0),
+            new Item(backstage, 6, 0),
+            new Item(backstage, 5, 0),
+            new Item(backstage, 1, 0),
+            new Item(backstage, 0, 50),
+            new Item(backstage, -1, 50),
+        };
+        GildedRose app = new GildedRose(items);
+        app.updateQuality();
+        assertEquals(app.items[0].quality, 1);
+        assertEquals(app.items[1].quality, 1);
+        assertEquals(app.items[2].quality, 2);
+        assertEquals(app.items[3].quality, 2);
+        assertEquals(app.items[4].quality, 3);
+        assertEquals(app.items[5].quality, 3);
+        assertEquals(app.items[6].quality, 0);
+        assertEquals(app.items[7].quality, 0);
+    }
 }