🐛 check for quality above 50

src/main/java/com/gildedrose/item_helpers/ItemFactory.java

@@ -15,7 +15,7 @@ public class ItemFactory {
     }
 
     public static ItemType getItemType(Item item) {
-        validateQuality(item);
+        QualityValidator.validateQuality(item);
         ItemName itemName = getItemName(item.name);
         switch (itemName) {
             case AGED_BRIE:
@@ -31,15 +31,4 @@ public class ItemFactory {
         }
     }
 
-    public static final String QUALITY_ERROR_MESSAGE = "Quality cannot be negative! Current value: ";
-
-    private static void validateQuality(Item item) {
-        if (qualityIsNegative(item)) {
-            throw new IllegalArgumentException(QUALITY_ERROR_MESSAGE + item.quality);
-        }
-    }
-
-    private static boolean qualityIsNegative(Item item) {
-        return item.quality < 0;
-    }
 }

src/main/java/com/gildedrose/item_helpers/ItemHandler.java

@@ -3,6 +3,7 @@ package com.gildedrose.item_helpers;
 import com.gildedrose.main.Item;
 
 import static java.lang.Math.max;
+import static java.lang.Math.min;
 
 public class ItemHandler {
 
@@ -37,15 +38,15 @@ public class ItemHandler {
     }
 
     public void incrementQuality() {
-        item.quality = max(item.quality + 1, 0);
+        item.quality = min(item.quality + 1, 50);
     }
 
     public void incrementQualityBy2() {
-        item.quality = max(item.quality + 2, 0);
+        item.quality = min(item.quality + 2, 50);
     }
 
     public void incrementQualityBy3() {
-        item.quality = max(item.quality + 3, 0);
+        item.quality = min(item.quality + 3, 50);
     }
 
     public void decrementQuality() {

src/main/java/com/gildedrose/item_helpers/QualityValidator.java

@@ -0,0 +1,37 @@
+package com.gildedrose.item_helpers;
+
+import com.gildedrose.main.Item;
+
+import static com.gildedrose.items.LegendaryItem.*;
+
+public class QualityValidator {
+
+    private QualityValidator() {
+    }
+
+    public static final String QUALITY_ERROR_MESSAGE = "Quality cannot be negative! Current value: ";
+    public static final String OUT_OF_BOUND_QUALITY_MESSAGE = "Quality cannot be above 50! Current value: ";
+    public static final String NOT_LEGENDARY_ITEM_ERROR_MESSAGE = "Item is legendary, quality must be always 80! Current value: ";
+
+    public static void validateQuality(Item item) {
+        if (isLegendaryWrongQuality(item)) {
+            throw new IllegalArgumentException(NOT_LEGENDARY_ITEM_ERROR_MESSAGE + item.quality);
+        } else if (qualityIsNegative(item)) {
+            throw new IllegalArgumentException(QUALITY_ERROR_MESSAGE + item.quality);
+        } else if (qualityIsAbove50(item)) {
+            throw new IllegalArgumentException(OUT_OF_BOUND_QUALITY_MESSAGE + item.quality);
+        }
+    }
+
+    public static boolean isLegendaryWrongQuality(Item item) {
+        return isLegendary(item) && item.quality != LEGENDARY_ITEM_QUALITY;
+    }
+
+    private static boolean qualityIsNegative(Item item) {
+        return item.quality < 0;
+    }
+
+    private static boolean qualityIsAbove50(Item item) {
+        return item.quality > 50 && isNotLegendary(item);
+    }
+}

src/main/java/com/gildedrose/items/LegendaryItem.java

@@ -9,11 +9,10 @@ import static com.gildedrose.item_helpers.ItemName.LEGENDARY;
 public class LegendaryItem implements ItemType {
 
     public static final int LEGENDARY_ITEM_QUALITY = 80;
-    public static final String NOT_LEGENDARY_ITEM_ERROR_MESSAGE = "Item is legendary, quality must be always 80! Current value: ";
+
     private final ItemHandler item;
 
     public LegendaryItem(Item item) {
-        validate(item);
         this.item = new ItemHandler(item);
     }
 
@@ -22,14 +21,12 @@ public class LegendaryItem implements ItemType {
         item.decrementSellInDate();
     }
 
-    private void validate(Item item) {
-        if (notLegendary(item)) {
-            throw new IllegalArgumentException(NOT_LEGENDARY_ITEM_ERROR_MESSAGE + item.quality);
-        }
+    public static boolean isLegendary(Item item) {
+        return item.name.equals(LEGENDARY.toString());
     }
 
-    public boolean notLegendary(Item item) {
-        return item.name.equals(LEGENDARY.toString()) && item.quality != LEGENDARY_ITEM_QUALITY;
+    public static boolean isNotLegendary(Item item) {
+        return !item.name.equals(LEGENDARY.toString());
     }
 
 }

src/test/java/com/gildedrose/helper/TestHelper.java

@@ -3,7 +3,8 @@ package com.gildedrose.helper;
 import com.gildedrose.main.GildedRose;
 import com.gildedrose.main.Item;
 
-import static com.gildedrose.item_helpers.ItemFactory.QUALITY_ERROR_MESSAGE;
+import static com.gildedrose.item_helpers.QualityValidator.OUT_OF_BOUND_QUALITY_MESSAGE;
+import static com.gildedrose.item_helpers.QualityValidator.QUALITY_ERROR_MESSAGE;
 import static org.junit.jupiter.api.Assertions.*;
 
 public class TestHelper {
@@ -27,4 +28,11 @@ public class TestHelper {
         assertTrue(actualMessage.contains(QUALITY_ERROR_MESSAGE));
     }
 
+    public static void testItemQualityAboveLimitException(Item item) {
+        GildedRose gildedRose = new GildedRose(item);
+        Exception exception = assertThrows(IllegalArgumentException.class, gildedRose::updateQuality);
+        String actualMessage = exception.getMessage();
+        assertTrue(actualMessage.contains(OUT_OF_BOUND_QUALITY_MESSAGE));
+    }
+
 }

src/test/java/com/gildedrose/items/LegendaryItemTest.java

@@ -8,10 +8,9 @@ import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.TestMethodOrder;
 
 import static com.gildedrose.helper.TestHelper.testItem;
-import static com.gildedrose.helper.TestHelper.testItemException;
+import static com.gildedrose.item_helpers.QualityValidator.NOT_LEGENDARY_ITEM_ERROR_MESSAGE;
 import static com.gildedrose.item_helpers.ItemName.LEGENDARY;
 import static com.gildedrose.items.LegendaryItem.LEGENDARY_ITEM_QUALITY;
-import static com.gildedrose.items.LegendaryItem.NOT_LEGENDARY_ITEM_ERROR_MESSAGE;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
@@ -43,10 +42,4 @@ class LegendaryItemTest {
         assertTrue(actualMessage.contains(NOT_LEGENDARY_ITEM_ERROR_MESSAGE));
     }
 
-
-    @Test
-    @Order(4)
-    void negativeQualityFail() {
-        testItemException(itemError);
-    }
 }

src/test/java/com/gildedrose/items/NormalItemTest.java

@@ -6,15 +6,15 @@ import org.junit.jupiter.api.Order;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.TestMethodOrder;
 
-import static com.gildedrose.helper.TestHelper.testItem;
-import static com.gildedrose.helper.TestHelper.testItemException;
+import static com.gildedrose.helper.TestHelper.*;
 import static com.gildedrose.item_helpers.ItemName.NORMAL;
 
 @TestMethodOrder(OrderAnnotation.class)
 class NormalItemTest {
 
     private final Item item = new Item(NORMAL.toString(), 5, 20);
-    private final Item itemError = new Item(NORMAL.toString(), 10, -5);
+    private final Item itemNegativeQuality = new Item(NORMAL.toString(), 10, -5);
+    private final Item itemAboveLimitQuality = new Item(NORMAL.toString(), 10, 60);
 
     @Test
     @Order(1)
@@ -31,6 +31,12 @@ class NormalItemTest {
     @Test
     @Order(3)
     void negativeQualityFail() {
-        testItemException(itemError);
+        testItemException(itemNegativeQuality);
+    }
+
+    @Test
+    @Order(4)
+    void QualityAboveLimitFail() {
+        testItemQualityAboveLimitException(itemAboveLimitQuality);
     }
 }

src/test/java/com/gildedrose/multiple_items/MultipleItemsTest.java

@@ -43,6 +43,9 @@ class MultipleItemsTest {
         int days = 20;
         for (int i = 0; i < days; i++) {
             gildedRose.updateQuality();
+            for (Item item : items) {
+                System.out.println(item);
+            }
         }
     }