Init test cases in GildedRose market

.gitignore

@@ -3,3 +3,4 @@ obj
 *.sln.DotSettings.user
 .vs
 vendor
+.idea/

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

@@ -0,0 +1,47 @@
+package com.gildedrose;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class GildedRoseShould {
+
+
+    @Test
+    void decrease_sellIn_and_maintains_quality_when_item_name_is_not_Sulfuras_and_quality_is_0() {
+        Item[] items = {new Item("NOT Sulfuras, Hand of Ragnaros", 10, 0)};
+        GildedRose gildedRose = new GildedRose(items);
+
+        gildedRose.updateQuality();
+
+        assertEquals(9, gildedRose.items[0].sellIn);
+        assertEquals(0, gildedRose.items[0].quality);
+    }
+
+    @Test
+    void decrease_sellIn_and_decrease_quality_when_item_name_is_not_Sulfuras_and_positive_quality() {
+        Item[] items = {new Item("NOT Sulfuras, Hand of Ragnaros", 10, 10)};
+        GildedRose gildedRose = new GildedRose(items);
+
+        gildedRose.updateQuality();
+
+        assertEquals(9, gildedRose.items[0].sellIn);
+        assertEquals(9, gildedRose.items[0].quality);
+    }
+
+    @Test
+    void decrease_sellIn_and_decrease_quality_when_item_name_is_AgedBrie_and_quality_is_40() {
+        Item[] items = {new Item("Aged Brie", 10, 40)};
+        GildedRose gildedRose = new GildedRose(items);
+
+        gildedRose.updateQuality();
+
+        assertEquals(9, gildedRose.items[0].sellIn);
+        assertEquals(41, gildedRose.items[0].quality);
+    }
+
+
+
+}

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

@@ -1,17 +0,0 @@
-package com.gildedrose;
-
-import org.junit.jupiter.api.Test;
-
-import static org.junit.jupiter.api.Assertions.assertEquals;
-
-class GildedRoseTest {
-
-    @Test
-    void foo() {
-        Item[] items = new Item[] { new Item("foo", 0, 0) };
-        GildedRose app = new GildedRose(items);
-        app.updateQuality();
-        assertEquals("fixme", app.items[0].name);
-    }
-
-}