TST/BUG: Remove error messages from tests

tests/javascript_tests/runner.js

@@ -51,15 +51,15 @@
                 result = message.data;
                 failed = !result || result.failed;
 
-                phantom.exit(failed ? 1 : 0);
+                exit(failed ? 1 : 0);
             }
         }
     };
 
     page.open(url, function(status) {
         if (status !== 'success') {
             console.error('Unable to access network: ' + status);
-            phantom.exit(1);
+            exit(1);
         } else {
             // Cannot do this verification with the 'DOMContentLoaded' handler because it
             // will be too late to attach it if a page does not have any script tags.
@@ -136,4 +136,21 @@
             });
         }, false);
     }
+
+    /*
+     This function was taken from:
+     https://github.com/jonkemp/qunit-phantomjs-runner
+
+     It helps prevent some problems with the output produced by this script.
+     */
+    function exit(code) {
+        if (page) {
+            page.close();
+        }
+        setTimeout(function () {
+            phantom.exit(code);
+        }, 0);
+    }
+
+
 })();