Reporting of policy errors via host-offline-reason: part 3

remoting/host/ack_or_timeout_reporter_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/host/ack_or_timeout_reporter.h"
+
+#include "base/bind.h"
+#include "base/location.h"
+#include "base/memory/weak_ptr.h"
+#include "base/sequenced_task_runner.h"
+#include "base/time/time.h"
+#include "remoting/host/mock_callback.h"
+
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace remoting {
+
+class MockSequencedTaskRunner : public base::SequencedTaskRunner {
+ public:
+  MOCK_METHOD3(PostDelayedTask,
+               bool(const tracked_objects::Location&,
+                    const base::Closure&,
+                    base::TimeDelta));
+
+  MOCK_CONST_METHOD0(RunsTasksOnCurrentThread, bool());
+
+  MOCK_METHOD3(PostNonNestableDelayedTask,
+               bool(const tracked_objects::Location&,
+                    const base::Closure&,
+                    base::TimeDelta));
+
+ private:
+  ~MockSequencedTaskRunner() {}
+};
+
+const base::TimeDelta kTestTimeout = base::TimeDelta::FromSeconds(123);
+
+static void CallReportAckOrTimeoutAndCaptureCallbacks(
+    const base::Callback<void(AckOrTimeout)>& ack_or_timeout_callback,
+    /* out */ base::Closure* captured_ack_callback,
+    /* out */ base::Closure* captured_timeout_callback) {
+  // Setup mocks.
+  MockCallback<void(const base::Closure&)> mock_function_that_acks;
+  scoped_refptr<MockSequencedTaskRunner> mock_task_runner(
+      new MockSequencedTaskRunner());
+
+  // Capture |captured_ack_callback| and |captured_timeout_callback|.
+  EXPECT_CALL(mock_function_that_acks, Run(testing::_))
+      .WillOnce(testing::SaveArg<0>(captured_ack_callback));
+  EXPECT_CALL(*mock_task_runner,
+              PostDelayedTask(testing::_, testing::_, kTestTimeout))
+      .WillOnce(testing::DoAll(testing::SaveArg<1>(captured_timeout_callback),
+                               testing::Return(true)));
+
+  // Call function-under-test.
+  ReportAckOrTimeout(mock_function_that_acks.GetCallback(), kTestTimeout,
+                     mock_task_runner, ack_or_timeout_callback);
+}
+
+TEST(AckOrTimeoutReporterTest, FirstAckCalledAsynchronously) {
+  MockCallback<void(AckOrTimeout)> mock_ack_or_timeout_callback;
+  base::Closure captured_ack_callback;
+  base::Closure captured_timeout_callback;
+
+  // |mock_ack_or_timeout_callback| should not be called until
+  // |captured_ack_callback| or |captured_timeout_callback| is called.
+  EXPECT_CALL(mock_ack_or_timeout_callback, Run(testing::_)).Times(0);
+
+  CallReportAckOrTimeoutAndCaptureCallbacks(
+      mock_ack_or_timeout_callback.GetCallback(), &captured_ack_callback,
+      &captured_timeout_callback);
+
+  {
+    // |mock_ack_or_timeout_callback| should be called as soon as
+    // |captured_ack_callback| runs.
+    EXPECT_CALL(mock_ack_or_timeout_callback, Run(AckOrTimeout::Ack));
+    captured_ack_callback.Run();
+  }
+
+  // |ack_or_timeout_callback| should be dropped after being called once.
+  // This is expectation is depended on by |MinimumHeartbeatSupporter| to
+  // manage its lifetime (i.e. release references to self after getting an
+  // ack).
+  EXPECT_FALSE(mock_ack_or_timeout_callback.HasRemainingCallbacks());
+
+  // It should be safe to call the callbacks multiple times.
+  captured_ack_callback.Run();
+  captured_timeout_callback.Run();
+}
+
+TEST(AckOrTimeoutReporterTest, FirstTimeoutCalledAsynchronously) {
+  MockCallback<void(AckOrTimeout)> mock_ack_or_timeout_callback;
+  base::Closure captured_ack_callback;
+  base::Closure captured_timeout_callback;
+
+  // |mock_ack_or_timeout_callback| should not be called until
+  // |captured_ack_callback| or |captured_timeout_callback| is called.
+  EXPECT_CALL(mock_ack_or_timeout_callback, Run(testing::_)).Times(0);
+
+  CallReportAckOrTimeoutAndCaptureCallbacks(
+      mock_ack_or_timeout_callback.GetCallback(), &captured_ack_callback,
+      &captured_timeout_callback);
+
+  {
+    // |mock_ack_or_timeout_callback| should be called as soon as
+    // |captured_ack_callback| runs.
+    EXPECT_CALL(mock_ack_or_timeout_callback, Run(AckOrTimeout::Timeout));
+    captured_timeout_callback.Run();
+  }
+
+  // |ack_or_timeout_callback| should be dropped after being called once.
+  // This is expectation is depended on by |MinimumHeartbeatSupporter| to
+  // manage its lifetime (i.e. release references to self after getting an
+  // ack).
+  EXPECT_FALSE(mock_ack_or_timeout_callback.HasRemainingCallbacks());
+
+  // It should be safe to call the callbacks multiple times.
+  captured_ack_callback.Run();
+  captured_timeout_callback.Run();
+}
+
+}  // namespace remoting