Made discovery more reliable & added docs/tests

- Added unit tests
- Added documentation for discovery classes
- Improved error handling

Tags: #story[1281]

src/test/java/seng302/serverDiscovery/ServerTableTest.java

@@ -0,0 +1,57 @@
+package seng302.serverDiscovery;
+
+import org.junit.BeforeClass;
+import org.junit.Test;
+import seng302.discoveryServer.util.ServerListing;
+import seng302.discoveryServer.util.ServerTable;
+
+import java.util.Objects;
+
+import static org.junit.Assert.assertTrue;
+
+public class ServerTableTest {
+    private static ServerTable serverTable;
+
+    @BeforeClass
+    public static void setup(){
+        serverTable = new ServerTable();
+    }
+
+    @Test
+    public void testAddServer(){
+        ServerListing listing = new ServerListing("", "", "", 12, 12);
+        serverTable.addServer(listing);
+
+        assertTrue(serverTable.getAllServers().contains(listing));
+    }
+
+    @Test
+    public void testGetNextRoomCodeIsUnique(){
+        assertTrue(!Objects.equals(serverTable.getNextRoomCode(), serverTable.getNextRoomCode()));
+    }
+
+    @Test
+    public void testGetServerRoomCode(){
+        ServerListing listing = new ServerListing("123", "", "", 12, 12);
+        listing.setRoomCode(serverTable.getNextRoomCode().toString());
+        serverTable.addServer(listing);
+
+        ServerListing result = serverTable.getServerByRoomCode(listing.getRoomCode());
+
+        assertTrue(result.equals(listing));
+    }
+
+    @Test
+    public void testServersRemovedOnExpiry() throws InterruptedException {
+        ServerListing listing = new ServerListing("432", "221", "", 12, 12);
+        listing.setTtl(1);
+
+        serverTable.addServer(listing);
+
+        listing.decrementTtl();
+
+        Thread.sleep(1000);
+
+        assertTrue(!serverTable.getAllServers().contains(listing));
+    }
+}

src/test/java/seng302/serverDiscovery/testStreamParser.java

@@ -0,0 +1,31 @@
+package seng302.serverDiscovery;
+
+import org.junit.Test;
+import seng302.gameServer.messages.Message;
+import seng302.gameServer.messages.RoomCodeRequest;
+import seng302.model.stream.packets.PacketType;
+import seng302.discoveryServer.util.ServerRepoStreamParser;
+
+import java.io.ByteArrayInputStream;
+import java.io.InputStream;
+
+import static org.junit.Assert.assertTrue;
+
+public class testStreamParser {
+    private static ServerRepoStreamParser parser;
+    private static InputStream inputStream;
+
+    private static void setupWithByteArray(byte[] bytes){
+        inputStream = new ByteArrayInputStream(bytes);
+        parser = new ServerRepoStreamParser(inputStream);
+    }
+
+    @Test
+    public void testParseRoomCodeRequest() throws Exception {
+        Message roomCodeMsg = new RoomCodeRequest("1234");
+        setupWithByteArray(roomCodeMsg.getBuffer());
+
+        assertTrue(parser.parse() == PacketType.ROOM_CODE_REQUEST);
+        assertTrue(parser.getRoomCode().equals("1234"));
+    }
+}