Pull out common code from client and host versions of ServerLogEntry.

remoting/protocol/server_log_entry_unittest.cc

+// Copyright 2014 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.
+
+#include "remoting/protocol/server_log_entry_unittest.h"
+
+#include <sstream>
+
+#include "third_party/libjingle/source/talk/xmllite/xmlelement.h"
+
+using buzz::XmlAttr;
+using buzz::XmlElement;
+
+namespace remoting {
+namespace protocol {
+
+bool VerifyStanza(
+    const std::map<std::string, std::string>& key_value_pairs,
+    const std::set<std::string> keys,
+    const XmlElement* elem,
+    std::string* error) {
+  int attrCount = 0;
+  for (const XmlAttr* attr = elem->FirstAttr(); attr != NULL;
+       attr = attr->NextAttr(), attrCount++) {
+    if (attr->Name().Namespace().length() != 0) {
+      *error = "attribute has non-empty namespace " +
+          attr->Name().Namespace();
+      return false;
+    }
+    const std::string& key = attr->Name().LocalPart();
+    const std::string& value = attr->Value();
+    std::map<std::string, std::string>::const_iterator iter =
+        key_value_pairs.find(key);
+    if (iter == key_value_pairs.end()) {
+      if (keys.find(key) == keys.end()) {
+        *error = "unexpected attribute " + key;
+        return false;
+      }
+    } else {
+      if (iter->second != value) {
+        *error = "attribute " + key + " has value " + iter->second +
+            ": expected " + value;
+        return false;
+      }
+    }
+  }
+  int attr_count_expected = key_value_pairs.size() + keys.size();
+  if (attrCount != attr_count_expected) {
+    std::stringstream s;
+    s << "stanza has " << attrCount << " keys: expected "
+      << attr_count_expected;
+    *error = s.str();
+    return false;
+  }
+  return true;
+}
+
+}  // namespace protocol
+}  // namespace remoting