approval tests for java analog to csharp variant

Java/pom.xml

@@ -24,6 +24,11 @@
             <version>${junit.jupiter.version}</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>com.approvaltests</groupId>
+            <artifactId>approvaltests</artifactId>
+            <version>12.1.1</version>
+        </dependency>
     </dependencies>
 
     <build>

Java/src/main/java/com/gildedrose/Program.java

@@ -0,0 +1,32 @@
+package com.gildedrose;
+
+public class Program {
+
+	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) };
+
+		GildedRose app = new GildedRose(items);
+
+		for (int i = 0; i < 31; i++) {
+			System.out.println("-------- day " + i + " --------");
+			System.out.println("name, sellIn, quality");
+			for (int j = 0; j < items.length; j++) {
+				System.out.println(items[j]);
+			}
+			System.out.println("");
+			app.updateQuality();
+		}
+	}
+}

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

@@ -0,0 +1,28 @@
+package com.gildedrose;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+
+import org.approvaltests.Approvals;
+import org.approvaltests.reporters.DiffReporter;
+import org.approvaltests.reporters.UseReporter;
+import org.junit.jupiter.api.Test;
+
+@UseReporter(DiffReporter.class)
+public class ApprovalTest {
+
+	@Test
+	public void thirtyDays() {
+
+		ByteArrayOutputStream fakeoutput = new ByteArrayOutputStream();
+		System.setOut(new PrintStream(fakeoutput));
+		System.setIn(new ByteArrayInputStream("a\n".getBytes()));
+
+		Program.main();
+		String output = fakeoutput.toString();
+
+		Approvals.verify(output);
+	}
+
+}