Sample approval test in Java that covers the Gilded Rose functionality

GildedRoseApprovalTest.java

package com.gildedrose;

import org.approvaltests.Approvals;
import org.approvaltests.combinations.CombinationApprovals;
import org.approvaltests.reporters.DiffReporter;
import org.approvaltests.reporters.UseReporter;
import org.junit.jupiter.api.Test;

@UseReporter(DiffReporter.class)
public class GildedRoseApprovalTest {

    @Test
    public void updateQuality() {

        CombinationApprovals.verifyAllCombinations(
            this::doUpdateQuality,
            new String[]{"foo", "Aged Brie", "Backstage passes to a TAFKAL80ETC concert", "Sulfuras, Hand of Ragnaros"},
            new Integer[] {-1, 0, 5, 6, 10, 11}, // sellIn
            new Integer[] {0, 1, 2, 49, 50} // quality
        );
    }

    public String doUpdateQuality(String name, Integer sellIn, Integer quality) {
        Item[] items = new Item[]{new Item(name, sellIn, quality)};
        GildedRose app = new GildedRose(items);
        app.updateQuality();

        Item item = items[0];
        return itemPrinter(item);
    }

    static String itemPrinter(Item item) {
        return item.name + ", sellIn: " + item.sellIn + ", Quality: " + item.quality;
    }

}