Implement support for IRC peer discovery. Patch contributed by John Sample.

tests/com/google/bitcoin/core/IrcDiscoveryTest.java

@@ -0,0 +1,49 @@
+/**
+ * Copyright John Sample
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.bitcoin.core;
+
+import static org.junit.Assert.*;
+
+import java.net.InetSocketAddress;
+import java.net.UnknownHostException;
+import java.util.ArrayList;
+
+import org.junit.Test;
+
+public class IrcDiscoveryTest {
+    // TODO: Inject a mock IRC server and more thoroughly exercise this class.
+
+    @Test
+    public void testParseUserList() throws UnknownHostException {
+        // Test some random addresses grabbed from the channel.
+        String[] userList = new String[]{ "x201500200","u4stwEBjT6FYyVV", "u5BKEqDApa8SbA7"};
+        
+        ArrayList<InetSocketAddress> addresses = IrcDiscovery.parseUserList(userList);
+        
+        // Make sure the "x" address is excluded.
+        assertEquals("Too many addresses.", 2, addresses.size());
+        
+        String[] ips = new String[]{"69.4.98.82:8333","74.92.222.129:8333"};
+        InetSocketAddress[] decoded = addresses.toArray(new InetSocketAddress[]{});
+        
+        for (int i = 0; i < decoded.length; i++) {
+            String formattedIP = decoded[0].getAddress().getHostAddress() + ":" + ((Integer)decoded[i].getPort()).toString();
+            assertEquals("IPs decoded improperly", ips[0], formattedIP);
+        }        
+    }
+
+}