Create Golden Master Approval Test

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

@@ -11,7 +11,7 @@ class GildedRoseTest {
         Item[] items = new Item[] { new Item("foo", 0, 0) };
         GildedRose app = new GildedRose(items);
         app.updateQuality();
-        assertEquals("fixme", app.items[0].name);
+        assertEquals("foo", app.items[0].name);
     }
 
 }

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

@@ -0,0 +1,42 @@
+package com.gildedrose;
+
+import org.approvaltests.combinations.CombinationApprovals;
+import org.junit.jupiter.api.Test;
+
+import java.util.stream.IntStream;
+
+class GoldenMasterApprovalTest {
+
+    @Test
+    void
+    gildedRoseApprovalTest() {
+        CombinationApprovals.verifyAllCombinations(
+            this::updateItem,
+            itemTypes(),
+            qualityRangeValues(),
+            sellInRangeValues()
+        );
+    }
+
+    private String[] itemTypes() {
+        return new String[]{"common item", "Aged Brie", "Backstage passes to a TAFKAL80ETC concert", "Sulfuras, Hand of Ragnaros"};
+    }
+
+    private Integer[] sellInRangeValues() {
+        return IntStream.range(-1, 12).boxed().toArray(Integer[]::new);
+    }
+
+    private Integer[] qualityRangeValues() {
+        return IntStream.range(0, 51).boxed().toArray(Integer[]::new);
+    }
+
+    private Item updateItem(String name, int quality, int sellIn) {
+        final Item item = new ItemBuilder()
+            .setName(name)
+            .setSellIn(sellIn)
+            .setQuality(quality)
+            .createItem();
+        new GildedRose(new Item[]{item}).updateQuality();
+        return item;
+    }
+}

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

@@ -0,0 +1,26 @@
+package com.gildedrose;
+
+public class ItemBuilder {
+    private String name;
+    private int sellIn;
+    private int quality;
+
+    public ItemBuilder setName(String name) {
+        this.name = name;
+        return this;
+    }
+
+    public ItemBuilder setSellIn(int sellIn) {
+        this.sellIn = sellIn;
+        return this;
+    }
+
+    public ItemBuilder setQuality(int quality) {
+        this.quality = quality;
+        return this;
+    }
+
+    public Item createItem() {
+        return new Item(name, sellIn, quality);
+    }
+}