Dispatch better disconnect events (#39)

* Fix #38 by sending a proper close() status code

See https://tools.ietf.org/html/rfc6455#section-7.4

* Add userInitiated boolean to the on-disconnected callback

That lets us distinguish between an expected and unexpected disconnect.

* Dispatch onDisconnected after a socket error

A socket failure implies that the socket also died, so it makes sense to also
dispatch a disconnected event.

* Fix CR comments

Author: Joe

ParseLiveQuery/src/main/java/com/parse/OkHttp3SocketClientFactory.java

@@ -29,7 +29,7 @@ public WebSocketClient createInstance(WebSocketClient.WebSocketClientCallback we
         return new OkHttp3WebSocketClient(mClient, webSocketClientCallback, hostUrl);
     }
 
-    class OkHttp3WebSocketClient implements WebSocketClient {
+    static class OkHttp3WebSocketClient implements WebSocketClient {
 
         private static final String LOG_TAG = "OkHttpWebSocketClient";
 
@@ -38,7 +38,7 @@ class OkHttp3WebSocketClient implements WebSocketClient {
         private State state = State.NONE;
         private final OkHttpClient client;
         private final String url;
-        private final int STATUS_CODE = 200;
+        private final int STATUS_CODE = 1000;
         private final String CLOSING_MSG = "User invoked close";
 
         private final WebSocketListener handler = new WebSocketListener() {

ParseLiveQuery/src/main/java/com/parse/ParseLiveQueryClientCallbacks.java

@@ -3,7 +3,7 @@
 public interface ParseLiveQueryClientCallbacks {
     void onLiveQueryClientConnected(ParseLiveQueryClient client);
 
-    void onLiveQueryClientDisconnected(ParseLiveQueryClient client);
+    void onLiveQueryClientDisconnected(ParseLiveQueryClient client, boolean userInitiated);
 
     void onLiveQueryError(ParseLiveQueryClient client, LiveQueryException reason);
 

ParseLiveQuery/src/main/java/com/parse/ParseLiveQueryClientImpl.java

@@ -138,8 +138,8 @@ public Void then(Task<Void> task) throws Exception {
     @Override
     public void disconnect() {
         if (webSocketClient != null) {
-            disconnectAsync();
             userInitiatedDisconnect = true;
+            disconnectAsync();
         }
     }
 
@@ -254,7 +254,7 @@ private void dispatchConnected() {
 
     private void dispatchDisconnected() {
         for (ParseLiveQueryClientCallbacks callback : mCallbacks) {
-            callback.onLiveQueryClientDisconnected(this);
+            callback.onLiveQueryClientDisconnected(this, userInitiatedDisconnect);
         }
     }
 
@@ -266,9 +266,13 @@ private void dispatchServerError(LiveQueryException exc) {
     }
 
     private void dispatchSocketError(Throwable reason) {
+        userInitiatedDisconnect = false;
+
         for (ParseLiveQueryClientCallbacks callback : mCallbacks) {
             callback.onSocketError(this, reason);
         }
+
+        dispatchDisconnected();
     }
 
     private <T extends ParseObject> void handleSubscribedEvent(JSONObject jsonObject) throws JSONException {

ParseLiveQuery/src/test/java/com/parse/TestParseLiveQueryClient.java

@@ -400,13 +400,29 @@ public void testDisconnectOnBackgroundThread() throws Exception {
     }
 
     @Test
-    public void testCallbackNotifiedOnDisconnect() throws Exception {
+    public void testCallbackNotifiedOnUnexpectedDisconnect() throws Exception {
         LoggingCallbacks callbacks = new LoggingCallbacks();
         parseLiveQueryClient.registerListener(callbacks);
         callbacks.transcript.assertNoEventsSoFar();
 
+        // Unexpected close from the server:
         webSocketClientCallback.onClose();
-        callbacks.transcript.assertEventsSoFar("onLiveQueryClientDisconnected");
+        callbacks.transcript.assertEventsSoFar("onLiveQueryClientDisconnected: false");
+    }
+
+    @Test
+    public void testCallbackNotifiedOnExpectedDisconnect() throws Exception {
+        LoggingCallbacks callbacks = new LoggingCallbacks();
+        parseLiveQueryClient.registerListener(callbacks);
+        callbacks.transcript.assertNoEventsSoFar();
+
+        parseLiveQueryClient.disconnect();
+        verify(webSocketClient, times(1)).close();
+
+        callbacks.transcript.assertNoEventsSoFar();
+        // the client is a mock, so it won't actually invoke the callback automatically
+        webSocketClientCallback.onClose();
+        callbacks.transcript.assertEventsSoFar("onLiveQueryClientDisconnected: true");
     }
 
     @Test
@@ -426,7 +442,8 @@ public void testCallbackNotifiedOnSocketError() throws Exception {
         callbacks.transcript.assertNoEventsSoFar();
 
         webSocketClientCallback.onError(new IOException("bad things happened"));
-        callbacks.transcript.assertEventsSoFar("onSocketError: java.io.IOException: bad things happened");
+        callbacks.transcript.assertEventsSoFar("onSocketError: java.io.IOException: bad things happened",
+                "onLiveQueryClientDisconnected: false");
     }
 
     @Test
@@ -548,8 +565,8 @@ public void onLiveQueryClientConnected(ParseLiveQueryClient client) {
         }
 
         @Override
-        public void onLiveQueryClientDisconnected(ParseLiveQueryClient client) {
-            transcript.add("onLiveQueryClientDisconnected");
+        public void onLiveQueryClientDisconnected(ParseLiveQueryClient client, boolean userInitiated) {
+            transcript.add("onLiveQueryClientDisconnected: " + userInitiated);
         }
 
         @Override