Backstage passes unit test

Java/README.md

@@ -16,8 +16,8 @@
 -[x] The Quality of an item is never more than 50
 -[x] "Sulfuras", being a legendary item, never has to be sold or decreases in Quality
 -[x] "Backstage passes", like aged brie, increases in Quality as its SellIn value approaches;
--[ ] Quality increases by 2 when there are 10 days or less and by 3 when there are 5 days or less but
+    -[x] Quality increases by 2 when there are 10 days or less and by 3 when there are 5 days or less but
--[ ] Quality drops to 0 after the concert
+    -[x] Quality drops to 0 after the concert
 -[ ] an item can never have its Quality increase above 50, however "Sulfuras" is a legendary item and as such its Quality is 80 and it never alters.
 
 ## Technical Issues, with a balanced priority

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

@@ -3,13 +3,14 @@ package com.gildedrose;
 import static org.junit.jupiter.api.Assertions.*;
 
 import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
 
 public class GildedRoseTest {
 
     @Test
     public void foo() {
-        Item[] items = new Item[] { new Item("foo", 0, 0) };
+        Item[] items = new Item[]{new Item("foo", 0, 0)};
         GildedRose app = new GildedRose(items);
         app.updateQuality();
         assertEquals("foo", app.items[0].name);
@@ -17,8 +18,8 @@ public class GildedRoseTest {
 
     @Test
     @DisplayName("At the end of each day our system lowers both values for every item")
-    public void shouldLowerBothValues(){
+    public void shouldLowerBothValues() {
-        Item[] items = new Item[] { TestHelper.getItem("foobar", 2, 2) };
+        Item[] items = new Item[]{TestHelper.getItem("foobar", 2, 2)};
         GildedRose app = new GildedRose(items);
         app.updateQuality();
         assertEquals(1, app.items[0].quality);
@@ -27,8 +28,8 @@ public class GildedRoseTest {
 
     @Test
     @DisplayName("Once the sell by date has passed (<=0), Quality degrades twice as fast")
-    public void shouldDowngradeTwiceAsFastAfterSellDate(){
+    public void shouldDowngradeTwiceAsFastAfterSellDate() {
-        Item[] items = new Item[] { TestHelper.getItem("foobar", 1, 5) };
+        Item[] items = new Item[]{TestHelper.getItem("foobar", 1, 5)};
         GildedRose app = new GildedRose(items);
 
         //day 1, drop by 1
@@ -60,7 +61,7 @@ public class GildedRoseTest {
 
     @Test
     @DisplayName("\"Aged Brie\" actually increases in Quality by 2 the older it gets")
-    public void shouldSeeAgedBrieIncreasedQualityDayByDay(){
+    public void shouldSeeAgedBrieIncreasedQualityDayByDay() {
         Item[] items = new Item[]{TestHelper.getItem("Aged Brie", 0, 0)};
         GildedRose app = new GildedRose(items);
 
@@ -75,7 +76,7 @@ public class GildedRoseTest {
 
     @Test
     @DisplayName("The Quality of an item is never more than 50")
-    public void shouldNeverHaveQualityHigherThan50(){
+    public void shouldNeverHaveQualityHigherThan50() {
         Item[] items = new Item[]{TestHelper.getItem("Aged Brie", 0, 49)};
         GildedRose app = new GildedRose(items);
 
@@ -91,7 +92,7 @@ public class GildedRoseTest {
     //Sulfuras, Hand of Ragnaros
     @Test
     @DisplayName("\"Sulfuras\", being a legendary item, never has to be sold or decreases in Quality")
-    public void shouldNotChangeSulfurasSellInAndQualityValues(){
+    public void shouldNotChangeSulfurasSellInAndQualityValues() {
         Item[] items = new Item[]{TestHelper.getItem("Sulfuras, Hand of Ragnaros", 0, 10)};
         GildedRose app = new GildedRose(items);
 
@@ -108,7 +109,7 @@ public class GildedRoseTest {
 
     @Test
     @DisplayName("\"Backstage passes\", like aged brie, increases in Quality as its SellIn value approaches")
-    public void shouldDo(){
+    public void shouldIncreaseQualityForBrieWhenSellInReduces() {
         Item[] items = new Item[]{TestHelper.getItem("Backstage passes to a TAFKAL80ETC concert", 5, 10)};
         GildedRose app = new GildedRose(items);
 
@@ -123,4 +124,40 @@ public class GildedRoseTest {
         assertEquals(3, app.items[0].sellIn);
     }
 
-}
+    @Nested
+    @DisplayName("Backstage passes")
+    class BaskstagePasses{
+        @Test
+        @DisplayName("Quality increases by 2 when there are 10 days or less and by 3 when there are 5 days or less but")
+        public void shouldIncreaseQualityBasedOnSellIn() {
+            Item[] items = new Item[]{
+                    TestHelper.getItem("Backstage passes to a TAFKAL80ETC concert", 10, 10),
+                    TestHelper.getItem("Backstage passes to a TAFKAL80ETC concert", 5, 10)
+            };
+            GildedRose app = new GildedRose(items);
+
+            app.updateQuality();
+            assertEquals(12, app.items[0].quality);
+            assertEquals(9, app.items[0].sellIn);
+
+            assertEquals(13, app.items[1].quality);
+            assertEquals(4, app.items[1].sellIn);
+        }
+
+        @Test
+        @DisplayName("Quality drops to 0 after the concert")
+        public void shouldHaveQualityDroppingToZeroAfterConcert(){
+            Item[] items = new Item[]{
+                    TestHelper.getItem("Backstage passes to a TAFKAL80ETC concert", 0, 10)
+            };
+
+            GildedRose app = new GildedRose(items);
+
+            app.updateQuality();
+            assertEquals(0, app.items[0].quality);
+            assertEquals(-1, app.items[0].sellIn);
+        }
+    }
+
+
+}