Curtis Cook's Clean Code Part 1

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

@@ -4,9 +4,71 @@ import org.junit.Assert;
 import org.junit.Test;
 
 public class InventoryTest {
+
+    // Given
+    Item agedBrie = new Item("Aged Brie", 10, 5);
+    Item backstagePasses = new Item("Backstage passes to a TAFKAL80ETC concert", 5, 10);
+    Item sulfuras = new Item("Sulfuras, Hand of Ragnaros", 15, 15);
+    Item random = new Item("Random Items", 0, 7);
+    Item[] items = {agedBrie, backstagePasses, sulfuras, random};
+    Inventory inventory = new Inventory(items);
+
+    @Test
+    public void updateQuantityTest() {
+        // Given
+        agedBrie.setSellIn(10);
+        int expected = 10 - 1;
+
+        //  When
+        inventory.updateQuality();
+        int actual = agedBrie.getSellIn();
+
+        // Then
+        Assert.assertEquals(expected, actual);
+    }
+
     @Test
-    public void updateQuantityTest(){
-        Assert.assertEquals(1, 1);
+    public void updateQuantityTest2() {
+        // Given
+        random.setName("Plan Old Java Objects");
+        int expected = 0 - 1;
+
+        // When
+        inventory.updateQuality();
+        int actual = random.getSellIn();
+
+        // Then
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void updateQuantityTest3() {
+        // Given
+        backstagePasses.setSellIn(-5);
+        backstagePasses.setQuality(75);
+        int expected = 75 - 75;
+
+        // When
+        inventory.updateQuality();
+        int actual = backstagePasses.getQuality();
+
+        // Then
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void updateQuantityTest4() {
+        // Given
+        agedBrie.setSellIn(-7);
+        agedBrie.setQuality(41);
+        int expected = 41 + 1 + 1;
+
+        // When
+        inventory.updateQuality();
+        int actual = agedBrie.getQuality();
+
+        // Then
+        Assert.assertEquals(expected, actual);
     }
 }