JAVA-2082: Canonicalize ServerAddress host by lowercasing it.

Author: jyemin

src/main/com/mongodb/ServerAddress.java

@@ -98,7 +98,7 @@ public ServerAddress( String host , int port )
             }
         }
 
-        _host = host;
+        _host = host.toLowerCase();
         _port = port;
     }
 

src/test/com/mongodb/ServerAddressTest.java

@@ -33,6 +33,14 @@ public void testDefault() throws UnknownHostException {
         assertEquals(ServerAddress.defaultPort(), subject.getPort());
     }
 
+    @Test
+    public void testLowerCaseHostName() throws UnknownHostException {
+        final String capitalizedHostName = "SOMEWHERE";
+        ServerAddress subject = new ServerAddress(capitalizedHostName);
+
+        assertEquals(capitalizedHostName.toLowerCase(), subject.getHost());
+    }
+
     @Test
     public void testParseIPV4WithoutPort() throws UnknownHostException {
         ServerAddress subject = new ServerAddress("10.0.0.1");
@@ -69,23 +77,23 @@ public void testParseDnsNameWithoutPort() throws UnknownHostException {
     public void testParseIPV6WithoutPort() throws UnknownHostException {
         ServerAddress subject = new ServerAddress("[2010:836B:4179::836B:4179]");
 
-        assertEquals("2010:836B:4179::836B:4179", subject.getHost());
+        assertEquals("2010:836b:4179::836b:4179", subject.getHost());
         assertEquals(ServerAddress.defaultPort(), subject.getPort());
     }
 
     @Test
     public void testParseIPV6WithPort() throws UnknownHostException {
         ServerAddress subject = new ServerAddress("[2010:836B:4179::836B:4179]:1000");
 
-        assertEquals("2010:836B:4179::836B:4179", subject.getHost());
+        assertEquals("2010:836b:4179::836b:4179", subject.getHost());
         assertEquals(1000, subject.getPort());
     }
 
     @Test
     public void testIPV6WithPort() throws UnknownHostException {
         ServerAddress subject = new ServerAddress("[2010:836B:4179::836B:4179]", 1000);
 
-        assertEquals("2010:836B:4179::836B:4179", subject.getHost());
+        assertEquals("2010:836b:4179::836b:4179", subject.getHost());
         assertEquals(1000, subject.getPort());
     }