Add NetworkStateTest helper class

chromeos/network/network_state_test.h

Index: chromeos/network/network_state_test.h
diff --git a/chromeos/network/network_state_test.h b/chromeos/network/network_state_test.h
new file mode 100644
index 0000000000000000000000000000000000000000..801fc2ceb6c9a9d9b5033228ca376fd9bc4290cc
--- /dev/null
+++ b/chromeos/network/network_state_test.h
@@ -0,0 +1,55 @@
+// Copyright 2017 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.
+
+#ifndef CHROMEOS_DBUS_SHILL_CLIENT_UNITTEST_BASE_H_
+#define CHROMEOS_DBUS_SHILL_CLIENT_UNITTEST_BASE_H_
+
+#include <memory>
+
+#include "chromeos/dbus/shill_manager_client.h"
+#include "chromeos/network/network_state_handler.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace chromeos {
+
+// Class for tests that need NetworkStateHandler. Handles initialization,
+// shutdown, and adds default profiles and a wifi device.
+class NetworkStateTest : public testing::Test {
+ public:
+  NetworkStateTest();
+  ~NetworkStateTest() override;
+
+  // DBusThreadManager::Initialize() must be called before SetUp().
+  void SetUp() override;
+  void TearDown() override;
+
+  // Call this before TearDown() to shut down NetworkStateHandler.
+  void ShutdownNetworkState();
+
+  // Configures a new service using Shill properties from |shill_json_string|
+  // which must include a GUID and Type.
+  bool ConfigureService(const std::string& shill_json_string);
+
+  // Returns a string value for property |key| associated with |service_path|.
+  // The result will be empty if the service or property do not exist.
+  std::string GetServiceStringProperty(const std::string& service_path,
+                                       const std::string& key);
+
+  ShillManagerClient::TestInterface* test_manager_client() {
+    return test_manager_client_;
+  }
+  NetworkStateHandler* network_state_handler() {
+    return network_state_handler_.get();
+  }
+
+  static const char kUserHash[];
+
+ private:
+  ShillManagerClient::TestInterface* test_manager_client_ = nullptr;
+  std::unique_ptr<NetworkStateHandler> network_state_handler_;
+};
+
+}  // namespace chromeos
+
+#endif  // CHROMEOS_DBUS_SHILL_CLIENT_UNITTEST_BASE_H_