Consolidate the update_client serialization code.

components/update_client/protocol_builder_unittest.cc

+// Copyright 2016 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 <string>
+
+#include "base/files/file_path.h"
+#include "base/memory/ptr_util.h"
+#include "base/path_service.h"
+#include "build/build_config.h"
+#include "components/update_client/protocol_builder.h"
+#include "components/update_client/updater_state.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using std::string;
+
+namespace update_client {
+
+TEST(UpdateClientUtils, BuildProtocolRequest_ProdIdVersion) {
+  // Verifies that |prod_id| and |version| are serialized.
+  const string request = BuildProtocolRequest("some_prod_id", "1.0", "", "", "",
+                                              "", "", "", nullptr);
+  EXPECT_NE(string::npos, request.find(" version=\"some_prod_id-1.0\" "));
+}
+
+TEST(UpdateClientUtils, BuildProtocolRequest_DownloadPreference) {
+  // Verifies that an empty |download_preference| is not serialized.
+  const string request_no_dlpref =
+      BuildProtocolRequest("", "", "", "", "", "", "", "", nullptr);
+  EXPECT_EQ(string::npos, request_no_dlpref.find(" dlpref="));
+
+  // Verifies that |download_preference| is serialized.
+  const string request_with_dlpref =
+      BuildProtocolRequest("", "", "", "", "", "some pref", "", "", nullptr);
+  EXPECT_NE(string::npos, request_with_dlpref.find(" dlpref=\"some pref\""));
+}
+
+TEST(UpdateClientUtils, BuildProtocolRequestUpdaterStateAttributes) {
+  // When no updater state is provided, then check that the elements and
+  // attributes related to the updater state are not serialized.
+  std::string request =
+      BuildProtocolRequest("", "", "", "", "", "", "", "", nullptr).c_str();
+  EXPECT_EQ(std::string::npos, request.find(" domainjoined"));
+  EXPECT_EQ(std::string::npos, request.find("<updater"));
+
+  UpdaterState::Attributes attributes;
+  attributes["domainjoined"] = "1";
+  attributes["name"] = "Omaha";
+  attributes["version"] = "1.2.3.4";
+  attributes["laststarted"] = "1";
+  attributes["lastchecked"] = "2";
+  attributes["autoupdatecheckenabled"] = "0";
+  attributes["updatepolicy"] = "-1";
+  request = BuildProtocolRequest(
+      "", "", "", "", "", "", "", "",
+      base::MakeUnique<UpdaterState::Attributes>(attributes));
+  EXPECT_NE(std::string::npos, request.find(" domainjoined=\"1\""));
+  const std::string updater_element =
+      "<updater autoupdatecheckenabled=\"0\" "
+      "lastchecked=\"2\" laststarted=\"1\" name=\"Omaha\" "
+      "updatepolicy=\"-1\" version=\"1.2.3.4\"/>";
+#if defined(GOOGLE_CHROME_BUILD)
+  EXPECT_NE(std::string::npos, request.find(updater_element));
+#else
+  EXPECT_EQ(std::string::npos, request.find(updater_element));
+#endif  // GOOGLE_CHROME_BUILD
+}
+
+}  // namespace update_client