Add unit tests matching the textTests

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

@@ -12,4 +12,66 @@ class GildedRoseTest {
         assertEquals("foo", app.items[0].name);
     }
 
+    @Test
+    void testDexterityVest() {
+        GildedRose app = GildedRoseAppTester.runFor(1, new Item("+5 Dexterity Vest", 10, 20));
+        assertEquals(9, app.items[0].sellIn);
+        assertEquals(19, app.items[0].quality);
+    }
+
+    @Test
+    void testAgedBrie() {
+        GildedRose app = GildedRoseAppTester.runFor(1, new Item("Aged Brie", 2, 0));
+        assertEquals(1, app.items[0].sellIn);
+        assertEquals(1, app.items[0].quality);
+    }
+
+    @Test
+    void testElixirOfMongoose() {
+        GildedRose app = GildedRoseAppTester.runFor(1, new Item("Elixir of the Mongoose", 5, 7));
+        assertEquals(4, app.items[0].sellIn);
+        assertEquals(6, app.items[0].quality);
+    }
+
+    @Test
+    void testSulfuras() {
+        GildedRose app = GildedRoseAppTester.runFor(1, new Item("Sulfuras, Hand of Ragnaros", 0, 80));
+        assertEquals(0, app.items[0].sellIn);
+        assertEquals(80, app.items[0].quality);
+    }
+
+    @Test
+    void testSulfurasExpired() {
+        GildedRose app = GildedRoseAppTester.runFor(1, new Item("Sulfuras, Hand of Ragnaros", -1, 80));
+        assertEquals(-1, app.items[0].sellIn);
+        assertEquals(80, app.items[0].quality);
+    }
+
+    @Test
+    void testBackstagePasses15() {
+        GildedRose app = GildedRoseAppTester.runFor(1, new Item("Backstage passes to a TAFKAL80ETC concert", 15, 20));
+        assertEquals(14, app.items[0].sellIn);
+        assertEquals(21, app.items[0].quality);
+    }
+
+    @Test
+    void testBackstagePasses10() {
+        GildedRose app = GildedRoseAppTester.runFor(1, new Item("Backstage passes to a TAFKAL80ETC concert", 10, 49));
+        assertEquals(9, app.items[0].sellIn);
+        assertEquals(50, app.items[0].quality);
+    }
+
+    @Test
+    void testBackstagePasses5() {
+        GildedRose app = GildedRoseAppTester.runFor(1, new Item("Backstage passes to a TAFKAL80ETC concert", 5, 49));
+        assertEquals(4, app.items[0].sellIn);
+        assertEquals(50, app.items[0].quality);
+    }
+
+//    @Test
+//    void testConjuredManaCake() {
+//        GildedRose app = GildedRoseAppTester.runFor(1, new Item("Conjured Mana Cake", 3, 6));
+//        assertEquals(2, app.items[0].sellIn);
+//        assertEquals(5, app.items[0].quality);
+//    }
 }