java: adds TestMessageUnpackable test

java/src/main/java/org/msgpack/Packer.java

@@ -212,7 +212,7 @@ public class Packer {
 			out.write(castBytes);
 			return this;
 		} else {
-			throw new MessageTypeException("can't BigInteger larger than 0xffffffffffffffff");
+			throw new MessageTypeException("can't pack BigInteger larger than 0xffffffffffffffff");
 		}
 	}
 

java/src/test/java/org/msgpack/Image.java

@@ -0,0 +1,50 @@
+package org.msgpack;
+
+import org.msgpack.*;
+import java.io.*;
+import java.util.*;
+
+public class Image implements MessagePackable, MessageUnpackable {
+	public String uri = "";
+	public String title = "";
+	public int width = 0;
+	public int height = 0;
+	public int size = 0;
+
+	public void messagePack(Packer pk) throws IOException {
+		pk.packArray(5);
+		pk.pack(uri);
+		pk.pack(title);
+		pk.pack(width);
+		pk.pack(height);
+		pk.pack(size);
+	}
+
+	public void messageUnpack(Unpacker pac) throws IOException, MessageTypeException {
+		int length = pac.unpackArray();
+		if(length != 5) {
+			throw new MessageTypeException();
+		}
+		uri = pac.unpackString();
+		title = pac.unpackString();
+		width = pac.unpackInt();
+		height = pac.unpackInt();
+		size = pac.unpackInt();
+	}
+
+	public boolean equals(Image obj) {
+		return uri.equals(obj.uri) &&
+			title.equals(obj.title) &&
+			width == obj.width &&
+			height == obj.height &&
+			size == obj.size;
+	}
+
+	public boolean equals(Object obj) {
+		if(obj.getClass() != Image.class) {
+			return false;
+		}
+		return equals((Image)obj);
+	}
+}
+

java/src/test/java/org/msgpack/TestMessageUnpackable.java

@@ -0,0 +1,34 @@
+package org.msgpack;
+
+import org.msgpack.*;
+import java.io.*;
+import java.util.*;
+import java.math.BigInteger;
+
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+public class TestMessageUnpackable {
+	@Test
+	public void testImage() throws Exception {
+		Image src = new Image();
+		src.title = "msgpack";
+		src.uri = "http://msgpack.org/";
+		src.width = 2560;
+		src.height = 1600;
+		src.size = 4096000;
+
+		ByteArrayOutputStream out = new ByteArrayOutputStream();
+		src.messagePack(new Packer(out));
+
+		Image dst = new Image();
+
+		ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
+		Unpacker pac = new Unpacker(in);
+
+		dst.messageUnpack(pac);
+
+		assertEquals(src, dst);
+	}
+}
+