Added YachtEvent message with encoder and decoder

- Updated Encoder and Decoder factories for the new message type
- Added an enum for handling yacht event types

#story[1100]

racevisionGame/src/test/java/network/MessageDecoders/YachtEventCodeDecoderTest.java

@@ -0,0 +1,47 @@
+package network.MessageDecoders;
+
+import network.MessageEncoders.RaceVisionByteEncoder;
+import network.Messages.Enums.YachtEventEnum;
+import network.Messages.YachtEvent;
+import org.junit.Before;
+import org.junit.Test;
+
+import static org.testng.Assert.*;
+
+/**
+ * Tests for the YachtEvent decoder and encoder
+ */
+public class YachtEventCodeDecoderTest {
+    private YachtEvent decodedMessage;
+    private YachtEvent originalMessage;
+
+    @Before
+    public void setUp() throws Exception {
+        long timestamp = System.currentTimeMillis();
+
+        originalMessage = new YachtEvent(
+                timestamp,
+                55,
+                35,
+                0,
+                1,
+                YachtEventEnum.COLLISION
+        );
+
+        byte[] encodedMessage = RaceVisionByteEncoder.encode(originalMessage);
+
+        YachtEventCodeDecoder testDecoder = new YachtEventCodeDecoder();
+        testDecoder.decode(encodedMessage);
+        decodedMessage = testDecoder.getMessage();
+    }
+
+    @Test
+    public void decodingEqualsOriginal() {
+        assertEquals(originalMessage.getCurrentTime(), decodedMessage.getCurrentTime());
+        assertEquals(originalMessage.getAckNum(), decodedMessage.getAckNum());
+        assertEquals(originalMessage.getRaceID(), decodedMessage.getRaceID());
+        assertEquals(originalMessage.getSourceID(), decodedMessage.getSourceID());
+        assertEquals(originalMessage.getIncidentID(), decodedMessage.getIncidentID());
+        assertEquals(originalMessage.getYachtEvent(), decodedMessage.getYachtEvent());
+    }
+}