From e2c4df0d5c91cf7d7000fce2edf5833369f9bfcc Mon Sep 17 00:00:00 2001
From: Ibrahim Dogrusoz <idogrusoz@gmail.com>
Date: Sun, 28 May 2023 15:55:50 +0200
Subject: [PATCH] Test that existing code meets the requirements

---
 .../java/com/gildedrose/GildedRoseTest.java   | 91 ++++++++++++++++++-
 .../java/com/gildedrose/TexttestFixture.java  | 22 ++---
 2 files changed, 99 insertions(+), 14 deletions(-)

diff --git a/Java/src/test/java/com/gildedrose/GildedRoseTest.java b/Java/src/test/java/com/gildedrose/GildedRoseTest.java
index 8ae29eec..e1adebd2 100644
--- a/Java/src/test/java/com/gildedrose/GildedRoseTest.java
+++ b/Java/src/test/java/com/gildedrose/GildedRoseTest.java
@@ -7,11 +7,98 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 class GildedRoseTest {
 
     @Test
-    void foo() {
+    void givenItem_whenUpdated_thenSellInDecrements() {
         Item[] items = new Item[] { new Item("foo", 0, 0) };
         GildedRose app = new GildedRose(items);
         app.updateQuality();
-        assertEquals("fixme", app.items[0].name);
+        assertEquals(-1, app.items[0].sellIn);
     }
 
+    @Test
+    void givenItem_whenUpdated_thenQualityDecrements() {
+        Item[] items = new Item[] { new Item("foo", 10, 10) };
+        GildedRose app = new GildedRose(items);
+        app.updateQuality();
+        assertEquals(9, app.items[0].quality);
+    }
+
+    @Test
+    void givenExpiredItem_whenUpdated_thenQualityDecrementsByTwo() {
+        Item[] items = new Item[] { new Item("foo", 0, 10) };
+        GildedRose app = new GildedRose(items);
+        app.updateQuality();
+        assertEquals(8, app.items[0].quality);
+    }
+
+    @Test
+    void givenItemWithZeroQuality_whenUpdated_thenQualityIsNeverNegative() {
+        Item[] items = new Item[] { new Item("foo", 0, 0) };
+        GildedRose app = new GildedRose(items);
+        app.updateQuality();
+        assertEquals(0, app.items[0].quality);
+    }
+
+    @Test
+    void givenAgedBrie_whenUpdated_thenQualityIncrements() {
+        Item[] items = new Item[] { new Item("Aged Brie", 10, 10) };
+        GildedRose app = new GildedRose(items);
+        app.updateQuality();
+        assertEquals(11, app.items[0].quality);
+    }
+
+    @Test
+    void givenAgedBrieWithQuality50_whenUpdated_thenQualityRemainsTheSame() {
+        Item[] items = new Item[] { new Item("Aged Brie", 10, 50) };
+        GildedRose app = new GildedRose(items);
+        app.updateQuality();
+        assertEquals(50, app.items[0].quality);
+    }
+
+    @Test
+    void givenLegendaryItem_whenUpdated_thenSellInStaysTheSame() {
+        Item[] items = new Item[] { new Item("Sulfuras, Hand of Ragnaros", 0, 80) };
+        GildedRose app = new GildedRose(items);
+        app.updateQuality();
+        assertEquals(0, app.items[0].sellIn);
+    }
+
+    @Test
+    void givenLegendaryItem_whenUpdated_thenQualityStaysTheSame() {
+        Item[] items = new Item[] { new Item("Sulfuras, Hand of Ragnaros", 0, 80) };
+        GildedRose app = new GildedRose(items);
+        app.updateQuality();
+        assertEquals(80, app.items[0].quality);
+    }
+
+    @Test
+    void givenBackstagePasses_whenUpdated_thenQualityIncrements() {
+        Item[] items = new Item[] { new Item("Backstage passes to a TAFKAL80ETC concert", 20, 10) };
+        GildedRose app = new GildedRose(items);
+        app.updateQuality();
+        assertEquals(11, app.items[0].quality);
+    }
+
+    @Test
+    void givenBackstagePassesWith10DaysToConcert_whenUpdated_thenQualityIncrementsByTwo() {
+        Item[] items = new Item[] { new Item("Backstage passes to a TAFKAL80ETC concert", 10, 10) };
+        GildedRose app = new GildedRose(items);
+        app.updateQuality();
+        assertEquals(12, app.items[0].quality);
+    }
+
+    @Test
+    void givenBackstagePassesWith5DaysToConcert_whenUpdated_thenQualityIncrementsByThree() {
+        Item[] items = new Item[] { new Item("Backstage passes to a TAFKAL80ETC concert", 5, 10) };
+        GildedRose app = new GildedRose(items);
+        app.updateQuality();
+        assertEquals(13, app.items[0].quality);
+    }
+
+    @Test
+    void givenBackstagePassesAfterTheConcert_whenUpdated_thenQualityIsZero() {
+        Item[] items = new Item[] { new Item("Backstage passes to a TAFKAL80ETC concert", 0, 10) };
+        GildedRose app = new GildedRose(items);
+        app.updateQuality();
+        assertEquals(0, app.items[0].quality);
+    }
 }
diff --git a/Java/src/test/java/com/gildedrose/TexttestFixture.java b/Java/src/test/java/com/gildedrose/TexttestFixture.java
index d059c88f..c78e15f5 100644
--- a/Java/src/test/java/com/gildedrose/TexttestFixture.java
+++ b/Java/src/test/java/com/gildedrose/TexttestFixture.java
@@ -2,19 +2,17 @@ package com.gildedrose;
 
 public class TexttestFixture {
     public static void main(String[] args) {
-        System.out.println("OMGHAI!");
 
-        Item[] items = new Item[] {
-                new Item("+5 Dexterity Vest", 10, 20), //
-                new Item("Aged Brie", 2, 0), //
-                new Item("Elixir of the Mongoose", 5, 7), //
-                new Item("Sulfuras, Hand of Ragnaros", 0, 80), //
-                new Item("Sulfuras, Hand of Ragnaros", -1, 80),
-                new Item("Backstage passes to a TAFKAL80ETC concert", 15, 20),
-                new Item("Backstage passes to a TAFKAL80ETC concert", 10, 49),
-                new Item("Backstage passes to a TAFKAL80ETC concert", 5, 49),
-                // this conjured item does not work properly yet
-                new Item("Conjured Mana Cake", 3, 6) };
+        Item[] items = new Item[]{
+            new Item("+5 Dexterity Vest", 10, 20), //
+            new Item("Aged Brie", 2, 0), //
+            new Item("Elixir of the Mongoose", 5, 7), //
+            new Item("Sulfuras, Hand of Ragnaros", 0, 80), //
+            new Item("Sulfuras, Hand of Ragnaros", -1, 80),
+            new Item("Backstage passes to a TAFKAL80ETC concert", 15, 20),
+            new Item("Backstage passes to a TAFKAL80ETC concert", 10, 49),
+            new Item("Backstage passes to a TAFKAL80ETC concert", 5, 49)
+        };
 
         GildedRose app = new GildedRose(items);