From ce81b8bb03a9d84470710694688b199b3c44c387 Mon Sep 17 00:00:00 2001
From: Eric Jan Malotaux <emalotau@gmail.com>
Date: Wed, 27 Apr 2022 00:07:00 +0200
Subject: [PATCH] Quality is never more than 50 (except Sulfuras).

---
 .../test/kotlin/com/gildedrose/GildedRoseTest.kt   | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Kotlin/src/test/kotlin/com/gildedrose/GildedRoseTest.kt b/Kotlin/src/test/kotlin/com/gildedrose/GildedRoseTest.kt
index 4bd74c6b..9e1f12f0 100644
--- a/Kotlin/src/test/kotlin/com/gildedrose/GildedRoseTest.kt
+++ b/Kotlin/src/test/kotlin/com/gildedrose/GildedRoseTest.kt
@@ -47,6 +47,20 @@ internal class GildedRoseTest {
         }
     }
 
+    @Test
+    fun qualityIsNeverMoreThanFifty() {
+        (items.map { it.sellIn }.maxOrNull()!! downTo -3).forEach {
+            gildedRose.updateQuality()
+            assertFalse(
+                items
+                    .filterNot { it.name.startsWith("Sulfuras") }
+                    .map { it.quality }
+                    .maxOrNull()!!
+                        > 50
+            )
+        }
+    }
+
     @Test
     fun ordinaryItemsDecreaseInSellIn() {
         val elixir = gildedRose.items.first { it.name.startsWith("Elixir") }