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 {
+namespace protocol {
+
+class PairingRegistryDelegateLinuxTest : public testing::Test {
+ public:
+  void SaveComplete(PairingRegistry::Delegate* delegate,
+                    PairingRegistry::Pairing pairing,
+                    bool success) {
+    EXPECT_TRUE(success);
+    // Load the pairings again to make sure we get what we've just written.

[Lambros, 2013/06/20 17:59:20]

I think it would be better to delete the delegate here and create a new one.
Otherwise, a delegate could pass this test by pretending to save, then returning
its own internal cached data without actually loading it from disk.

[Jamie, 2013/06/20 20:17:09]

Done.

+    delegate->GetPairing(
+        pairing.client_id(),
+        base::Bind(&PairingRegistryDelegateLinuxTest::VerifyLoad,
+                   base::Unretained(this),
+                   pairing));
+  }
+
+  void VerifyLoad(PairingRegistry::Pairing expected,
+                  PairingRegistry::Pairing 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, then delete
+  // it so that we can 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("registry.json");
+  file_util::Delete(temp_dir, false);

[Lambros, 2013/06/20 17:59:20]

Better not to delete the temp dir here. Instead, do something like
temp_file = temp_dir.Append("xxx").Append("registry.json");

[Jamie, 2013/06/20 20:17:09]

Done.

+
+  PairingRegistryDelegateLinux* delegate =
+      new PairingRegistryDelegateLinux(base::ThreadTaskRunnerHandle::Get());
+  delegate->SetFilenameForTesting(temp_file);
+
+  PairingRegistry::Pairing pairing =
+      PairingRegistry::Pairing::Create("client_id");
+  delegate->AddPairing(
+      pairing,
+      base::Bind(&PairingRegistryDelegateLinuxTest::SaveComplete,
+                 base::Unretained(this),
+                 delegate,
+                 pairing));
+
+  run_loop.Run();
+
+  file_util::Delete(temp_dir, true);
+};
+
+}  // namespace protocol
+}  // namespace remoting