write unit tests for service to test functionality

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

@@ -11,7 +11,116 @@ class GildedRoseTest {
         Item[] items = new Item[] { new Item("foo", 0, 0) };
         GildedRose app = new GildedRose(items);
         app.updateQuality();
-        assertEquals("fixme", app.items[0].name);
+        assertEquals("foo", app.items[0].name);
     }
+    
+    @Test 
+    void testDexterityVest() {
+    	Item dexVest = new Item("+5 Dexterity Vest", 2, 20);
+    	Item[] items = new Item[] { dexVest };
+    	GildedRose gildedRose = new GildedRose(items);
+    	// day one
+    	gildedRose.updateQuality();
+    	assertEquals(1, dexVest.sellIn);
+    	assertEquals(19, dexVest.quality);
+    	// day two
+    	gildedRose.updateQuality();
+    	assertEquals(0, dexVest.sellIn);
+    	assertEquals(18, dexVest.quality);
+    	// day three
+    	gildedRose.updateQuality();
+    	assertEquals(-1, dexVest.sellIn);
+    	assertEquals(16, dexVest.quality);
+    }
+    
+    @Test 
+    void testSulfuras() {
+    	Item sulfuras = new Item("Sulfuras, Hand of Ragnaros", 0, 80);
+    	Item[] items = new Item[] { sulfuras };
+    	GildedRose gildedRose = new GildedRose(items);
+    	// day one
+    	gildedRose.updateQuality();
+    	assertEquals(0, sulfuras.sellIn);
+    	assertEquals(80, sulfuras.quality);
+    	// day two
+    	gildedRose.updateQuality();
+    	assertEquals(0, sulfuras.sellIn);
+    	assertEquals(80, sulfuras.quality);
+    	// day three
+    	gildedRose.updateQuality();
+    	assertEquals(0, sulfuras.sellIn);
+    	assertEquals(80, sulfuras.quality);
+    }
+    
+    @Test 
+    void testAgedBrie() {
+    	Item agedBrie = new Item("Aged Brie", 2, 0);
+    	Item qualityBrie = new Item("Aged Brie", 2, 48);
+    	Item[] items = new Item[] { agedBrie, qualityBrie };
+    	GildedRose gildedRose = new GildedRose(items);
+    	// day one
+    	gildedRose.updateQuality();
+    	assertEquals(1, agedBrie.sellIn);
+    	assertEquals(1, agedBrie.quality);
+    	assertEquals(49, qualityBrie.quality);
+    	// day two
+    	gildedRose.updateQuality();
+    	assertEquals(0, agedBrie.sellIn);
+    	assertEquals(2, agedBrie.quality);
+    	assertEquals(50, qualityBrie.quality);
+    	// day three
+    	gildedRose.updateQuality();
+    	assertEquals(-1, agedBrie.sellIn);
+    	assertEquals(4, agedBrie.quality);
+    	assertEquals(50, qualityBrie.quality);
+    }
+    
+    @Test 
+    void testBackStage() {
+    	Item newTicket = new Item("Backstage passes to a TAFKAL80ETC concert", 15, 20);
+        Item olderTicket = new Item("Backstage passes to a TAFKAL80ETC concert", 10, 29);
+        Item urgentTicket = new Item("Backstage passes to a TAFKAL80ETC concert", 5, 29);
+        Item experingTicket = new Item("Backstage passes to a TAFKAL80ETC concert", 2, 49);
+    	Item[] items = new Item[] { newTicket, olderTicket, urgentTicket, experingTicket };
+    	GildedRose gildedRose = new GildedRose(items);
+    	// day one
+    	gildedRose.updateQuality();
+    	assertEquals(21, newTicket.quality); // increases quality by 1 with each passing day
+    	assertEquals(31, olderTicket.quality); // increases by 2 when days left =< 10
+    	assertEquals(32, urgentTicket.quality); // increases by 3 when days left =< 5
+    	assertEquals(50, experingTicket.quality); // quality never exceeds 50
+    	// day two
+    	gildedRose.updateQuality();
+    	assertEquals(22, newTicket.quality);
+    	assertEquals(33, olderTicket.quality);
+    	assertEquals(35, urgentTicket.quality);
+    	assertEquals(50, experingTicket.quality);
+    	// day three
+    	gildedRose.updateQuality();
+    	assertEquals(23, newTicket.quality);
+    	assertEquals(35, olderTicket.quality);
+    	assertEquals(38, urgentTicket.quality);
+    	assertEquals(0, experingTicket.quality); // quality drops to zero when ticket expires
+    }
+    
+    @Test 
+    void testConjuredItem() {
+    	Item conjuredItem = new Item("Conjured Mana Cake", 3, 6);
+    	Item[] items = new Item[] { conjuredItem };
+    	GildedRose gildedRose = new GildedRose(items);
+    	// day one
+    	gildedRose.updateQuality();
+    	assertEquals(2, conjuredItem.sellIn);
+    	assertEquals(4, conjuredItem.quality); //TODO this is the feature to get working
+    	// day two
+    	gildedRose.updateQuality();
+    	assertEquals(1, conjuredItem.sellIn);
+    	assertEquals(2, conjuredItem.quality); //TODO this is the feature to get working
+    	// day three
+    	gildedRose.updateQuality();
+    	assertEquals(0, conjuredItem.sellIn);
+    	assertEquals(2, conjuredItem.quality); //TODO this is the feature to get working
+    }
+    
 
 }