Unit Tests changes

Java/src/test/java/com/gildedrose/GildedRoseTest.java

@@ -2,34 +2,122 @@ package com.gildedrose;
 
 import org.junit.jupiter.api.Test;
 
-import static com.gildedrose.GildedRoseConstants.*;
-import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.*;
 
 public class GildedRoseTest {
     @Test
-    void agedBrieIncreasesInQuality() {
-        Item[] items = new Item[] { new Item(AGED_BRIE, 2, 0) };
-        GildedRose app = new GildedRose(items);
+    void normalItemDegradesQuality() {
+        Item item = new Item("Normal Item", 10, 20);
+        GildedRose app = new GildedRose(new Item[]{item});
         app.updateQuality();
-        assertEquals(1, items[0].quality);
-        assertEquals(1, items[0].sellIn);
+        assertEquals(9, item.sellIn);
+        assertEquals(19, item.quality);
     }
 
     @Test
-    void sulfurasDoesNotChange() {
-        Item[] items = new Item[] { new Item(SULFURAS, 0, 80) };
-        GildedRose app = new GildedRose(items);
+    void normalItemDegradesTwiceAfterSellIn() {
+        Item item = new Item("Normal Item", 0, 20);
+        GildedRose app = new GildedRose(new Item[]{item});
         app.updateQuality();
-        assertEquals(80, items[0].quality);
-        assertEquals(0, items[0].sellIn);
+        assertEquals(-1, item.sellIn);
+        assertEquals(18, item.quality);
     }
 
     @Test
-    void backstagePassIncreasesCorrectly() {
-        Item[] items = new Item[] { new Item(BACKSTAGE_PASS, 5, 10) };
-        GildedRose app = new GildedRose(items);
+    void agedBrieIncreasesQuality() {
+        Item item = new Item("Aged Brie", 2, 0);
+        GildedRose app = new GildedRose(new Item[]{item});
         app.updateQuality();
-        assertEquals(13, items[0].quality);
-        assertEquals(4, items[0].sellIn);
+        assertEquals(1, item.sellIn);
+        assertEquals(1, item.quality);
+    }
+
+    @Test
+    void agedBrieIncreasesQualityTwiceAfterSellIn() {
+        Item item = new Item("Aged Brie", 0, 0);
+        GildedRose app = new GildedRose(new Item[]{item});
+        app.updateQuality();
+        assertEquals(-1, item.sellIn);
+        assertEquals(2, item.quality);
+    }
+
+    @Test
+    void qualityNeverMoreThanFifty() {
+        Item item = new Item("Aged Brie", 1, 50);
+        GildedRose app = new GildedRose(new Item[]{item});
+        app.updateQuality();
+        assertEquals(0, item.sellIn);
+        assertEquals(50, item.quality);
+    }
+
+    @Test
+    void sulfurasNeverChanges() {
+        Item item = new Item("Sulfuras, Hand of Ragnaros", 0, 80);
+        GildedRose app = new GildedRose(new Item[]{item});
+        app.updateQuality();
+        assertEquals(0, item.sellIn);
+        assertEquals(80, item.quality);
+    }
+
+    @Test
+    void backstagePassIncreasesByOneOverTenDays() {
+        Item item = new Item("Backstage passes to a TAFKAL80ETC concert", 15, 20);
+        GildedRose app = new GildedRose(new Item[]{item});
+        app.updateQuality();
+        assertEquals(14, item.sellIn);
+        assertEquals(21, item.quality);
+    }
+
+    @Test
+    void backstagePassIncreasesByTwoTenToSixDays() {
+        Item item = new Item("Backstage passes to a TAFKAL80ETC concert", 10, 20);
+        GildedRose app = new GildedRose(new Item[]{item});
+        app.updateQuality();
+        assertEquals(9, item.sellIn);
+        assertEquals(22, item.quality);
+    }
+
+    @Test
+    void backstagePassIncreasesByThreeFiveToOneDays() {
+        Item item = new Item("Backstage passes to a TAFKAL80ETC concert", 5, 20);
+        GildedRose app = new GildedRose(new Item[]{item});
+        app.updateQuality();
+        assertEquals(4, item.sellIn);
+        assertEquals(23, item.quality);
+    }
+
+    @Test
+    void backstagePassDropsToZeroAfterConcert() {
+        Item item = new Item("Backstage passes to a TAFKAL80ETC concert", 0, 20);
+        GildedRose app = new GildedRose(new Item[]{item});
+        app.updateQuality();
+        assertEquals(-1, item.sellIn);
+        assertEquals(0, item.quality);
+    }
+
+    @Test
+    void conjuredItemDegradesTwiceAsFast() {
+        Item item = new Item("Conjured Mana Cake", 3, 6);
+        GildedRose app = new GildedRose(new Item[]{item});
+        app.updateQuality();
+        assertEquals(2, item.sellIn);
+        assertEquals(4, item.quality);
+    }
+
+    @Test
+    void conjuredItemDegradesTwiceAsFastAfterSellIn() {
+        Item item = new Item("Conjured Mana Cake", 0, 6);
+        GildedRose app = new GildedRose(new Item[]{item});
+        app.updateQuality();
+        assertEquals(-1, item.sellIn);
+        assertEquals(2, item.quality);
+    }
+
+    @Test
+    void qualityNeverNegative() {
+        Item item = new Item("Normal Item", 5, 0);
+        GildedRose app = new GildedRose(new Item[]{item});
+        app.updateQuality();
+        assertEquals(0, item.quality);
     }
 }