Handling alert text controls conatining no accText property in IE.

Fixes issue #651.

Author: jimevans

Diff for: cpp/iedriver/Alert.cpp

@@ -208,6 +208,16 @@ std::string Alert::GetDirectUIDialogText() {
   if (FAILED(hr)) {
     LOGHR(WARN, hr) << "Failed to get accName property from text object";
     return alert_text_value;
+  } else if (hr != S_OK) {
+    // N.B., get_accName can return an error value without it being a
+    // standard COM error.
+    LOG(WARN) << "Getting accName property from text object returned an error "
+              << "(value: " << hr << "). The text object may not have a name.";
+    return alert_text_value;
+  } else if (text_bstr == NULL) {
+    LOG(WARN) << "Getting accName property from text object returned a null "
+              << "value";
+    return alert_text_value;
   }
 
   std::wstring text = text_bstr;

Diff for: cpp/iedriverserver/CHANGELOG

@@ -9,6 +9,11 @@ available via the project downloads page. Changes in "revision" field indicate
 private releases checked into the prebuilts directory of the source tree, but
 not made generally available on the downloads page.
 
+v2.46.0.0
+=========
+ * Handles issue with alert text controls conatining no accText property in IE.
+   Fixes issue #651.
+
 v2.46.0.0
 =========
  * Release to synchronize with release of Selenium project.