[Presentation API] change initial state of PresentationConnection to 'connecting'

chrome/test/media_router/resources/common.js

 /**
  * Copyright 2015 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
  * @fileoverview Common APIs for presentation integration tests.
  *
  */
 
 var startSessionPromise = null;
@@ skipping 49 matching lines @@
 
 /**
  * Checks if the session has been started successfully.
  */
 function checkSession() {
   if (!startSessionPromise) {
     sendResult(false, 'Did not attempt to start session');
   } else {
     startSessionPromise.then(function(session) {
       if(!session) {
-        sendResult(false, 'Failed to start session');
+        sendResult(false, 'Failed to start session: connection is null');
       } else {
         // set the new session
         startedConnection = session;
-        sendResult(true, '');
+        if (startedConnection.state != "connecting") {
+          sendResult(false,
+            'Expect connection state to be "connecting", actual "' +
+            startedConnection.state + '"');
+        }
+        startedConnection.onconnect = () => {
+          sendResult(true, '');
+        };
       }
-    }).catch(function() {
+    }).catch(function(e) {
       // terminate old session if exists
       startedConnection && startedConnection.terminate();
-      sendResult(false, 'Failed to start session');
+      sendResult(false, 'Failed to start session: encountered exception ' + e);
     })
   }
 }
 
 /**
  * Checks the start() request fails with expected error and message substring.
  * @param {!string} expectedErrorName
  * @param {!string} expectedErrorMessageSubstring
  */
 function checkStartFailed(expectedErrorName, expectedErrorMessageSubstring) {
@@ skipping 122 matching lines @@
       passed: passed,
       errorMessage: errorMessage
     }));
   } else {
     lastExecutionResult = JSON.stringify({
       passed: passed,
       errorMessage: errorMessage
     });
   }
 }