Linux pairing registry delegate implementation

remoting/host/pairing_registry_delegate_linux_unittest.cc

+// Copyright 2013 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/host/pairing_registry_delegate_linux.h"
+
+#include "base/file_util.h"
+#include "base/message_loop.h"
+#include "base/run_loop.h"
+#include "base/task_runner.h"
+#include "base/thread_task_runner_handle.h"
+#include "base/timer.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace remoting {
+
+using protocol::PairingRegistry;
+
+class PairingRegistryDelegateLinuxTest : public testing::Test {
+ public:
+  void SaveComplete(PairingRegistry::Delegate* delegate,
+                    const std::string& expected_json,
+                    bool success) {
+    EXPECT_TRUE(success);
+    // Load the pairings again to make sure we get what we've just written.
+    delegate->Load(
+        base::Bind(&PairingRegistryDelegateLinuxTest::VerifyLoad,
+                   base::Unretained(this),
+                   expected_json));
+  }
+
+  void VerifyLoad(const std::string& expected,
+                  const std::string& actual) {
+    EXPECT_EQ(actual, expected);
+    base::MessageLoop::current()->Quit();
+  }
+};
+
+TEST_F(PairingRegistryDelegateLinuxTest, SaveAndLoad) {
+  base::MessageLoop message_loop;
+  base::RunLoop run_loop;
+
+  // Create a temporary directory in order to get a unique name and use a
+  // subdirectory to ensure that the AddPairing method creates the parent
+  // directory if it doesn't exist.
+  base::FilePath temp_dir;
+  file_util::CreateNewTempDirectory("chromoting-test", &temp_dir);
+  base::FilePath temp_file = temp_dir.Append("dir").Append("registry.json");
+
+  scoped_refptr<base::TaskRunner> task_runner =
+      base::ThreadTaskRunnerHandle::Get();
+  scoped_ptr<PairingRegistryDelegateLinux> save_delegate(
+      new PairingRegistryDelegateLinux(task_runner));
+  scoped_ptr<PairingRegistryDelegateLinux> load_delegate(
+      new PairingRegistryDelegateLinux(task_runner));
+  save_delegate->SetFilenameForTesting(temp_file);
+  load_delegate->SetFilenameForTesting(temp_file);
+
+  // Save the pairings, then load them using a different delegate to ensure
+  // that the test isn't passing due to cached values. Note that the delegate
+  // doesn't require that the strings it loads and saves are valid JSON, so
+  // we can simplify the test a bit.
+  std::string test_data = "test data";
+  save_delegate->Save(
+      test_data,
+      base::Bind(&PairingRegistryDelegateLinuxTest::SaveComplete,
+                 base::Unretained(this),
+                 load_delegate.get(),
+                 test_data));
+
+  run_loop.Run();
+
+  file_util::Delete(temp_dir, true);
+};
+
+}  // namespace remoting