move approvals version of Java to own folder, provide alternative starting point and documentation

Java-Approvals/src/main/java/com/gildedrose/GildedRose.java

@@ -0,0 +1,62 @@
+package com.gildedrose;
+
+class GildedRose {
+    Item[] items;
+
+    public GildedRose(Item[] items) {
+        this.items = items;
+    }
+
+    public void updateQuality() {
+        for (int i = 0; i < items.length; i++) {
+            if (!items[i].name.equals("Aged Brie")
+                    && !items[i].name.equals("Backstage passes to a TAFKAL80ETC concert")) {
+                if (items[i].quality > 0) {
+                    if (!items[i].name.equals("Sulfuras, Hand of Ragnaros")) {
+                        items[i].quality = items[i].quality - 1;
+                    }
+                }
+            } else {
+                if (items[i].quality < 50) {
+                    items[i].quality = items[i].quality + 1;
+
+                    if (items[i].name.equals("Backstage passes to a TAFKAL80ETC concert")) {
+                        if (items[i].sellIn < 11) {
+                            if (items[i].quality < 50) {
+                                items[i].quality = items[i].quality + 1;
+                            }
+                        }
+
+                        if (items[i].sellIn < 6) {
+                            if (items[i].quality < 50) {
+                                items[i].quality = items[i].quality + 1;
+                            }
+                        }
+                    }
+                }
+            }
+
+            if (!items[i].name.equals("Sulfuras, Hand of Ragnaros")) {
+                items[i].sellIn = items[i].sellIn - 1;
+            }
+
+            if (items[i].sellIn < 0) {
+                if (!items[i].name.equals("Aged Brie")) {
+                    if (!items[i].name.equals("Backstage passes to a TAFKAL80ETC concert")) {
+                        if (items[i].quality > 0) {
+                            if (!items[i].name.equals("Sulfuras, Hand of Ragnaros")) {
+                                items[i].quality = items[i].quality - 1;
+                            }
+                        }
+                    } else {
+                        items[i].quality = items[i].quality - items[i].quality;
+                    }
+                } else {
+                    if (items[i].quality < 50) {
+                        items[i].quality = items[i].quality + 1;
+                    }
+                }
+            }
+        }
+    }
+}

Java-Approvals/src/main/java/com/gildedrose/Item.java

@@ -0,0 +1,21 @@
+package com.gildedrose;
+
+public class Item {
+
+    public String name;
+
+    public int sellIn;
+
+    public int quality;
+
+    public Item(String name, int sellIn, int quality) {
+        this.name = name;
+        this.sellIn = sellIn;
+        this.quality = quality;
+    }
+
+   @Override
+   public String toString() {
+        return this.name + ", " + this.sellIn + ", " + this.quality;
+    }
+}

Java-Approvals/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-Approvals/src/test/java/com/gildedrose/GildedRoseApprovalTest.java

@@ -0,0 +1,38 @@
+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;
+import org.w3c.dom.Text;
+
+@UseReporter(DiffReporter.class)
+public class GildedRoseApprovalTest {
+
+	@Test
+	public void foo() {
+
+        Item[] items = new Item[] { new Item("foo", 0, 0) };
+        GildedRose app = new GildedRose(items);
+        app.updateQuality();
+
+		Approvals.verifyAll("Items", items);
+	}
+
+    @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);
+    }
+}