Add unit tests for sub-components of CaptureScheduler.

remoting/host/capture_scheduler_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/capture_scheduler.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace remoting {
+
+static const int kTestInputs[] = { 100, 50, 30, 20, 10, 30, 60, 80 };
+
+TEST(CaptureSchedulerTest, SingleSampleSameTimes) {
+  const int kTestResults[][arraysize(kTestInputs)] = {
+    { 400, 200, 120, 80, 50, 120, 240, 320 }, // One core.
+    { 200, 100, 60, 50, 50, 60, 120, 160 },   // Two cores.
+    { 100, 50, 50, 50, 50, 50, 60, 80 },      // Four cores.
+    { 50, 50, 50, 50, 50, 50, 50, 50 }        // Eight cores.
+  };
+
+  for (size_t i = 0; i < arraysize(kTestResults); ++i) {
+    for (size_t j = 0; j < arraysize(kTestInputs); ++j) {
+      CaptureScheduler scheduler;
+      scheduler.SetNumOfProcessorsForTest(1 << i);
+      scheduler.RecordCaptureTime(
+          base::TimeDelta::FromMilliseconds(kTestInputs[j]));
+      scheduler.RecordEncodeTime(
+          base::TimeDelta::FromMilliseconds(kTestInputs[j]));
+      EXPECT_EQ(kTestResults[i][j],
+                scheduler.NextCaptureDelay().InMilliseconds());
+    }
+  }
+}
+
+TEST(CaptureSchedulerTest, SingleSampleDifferentTimes) {
+  const int kTestResults[][arraysize(kTestInputs)] = {
+    { 360, 220, 120, 60, 60, 120, 220, 360 }, // One core.
+    { 180, 110, 60, 50, 50, 60, 110, 180 },   // Two cores.
+    { 90, 55, 50, 50, 50, 50, 55, 90 },       // Four cores.
+    { 50, 50, 50, 50, 50, 50, 50, 50 }        // Eight cores.
+  };
+
+  for (size_t i = 0; i < arraysize(kTestResults); ++i) {
+    for (size_t j = 0; j < arraysize(kTestInputs); ++j) {
+      CaptureScheduler scheduler;
+      scheduler.SetNumOfProcessorsForTest(1 << i);
+      scheduler.RecordCaptureTime(
+          base::TimeDelta::FromMilliseconds(kTestInputs[j]));
+      scheduler.RecordEncodeTime(
+          base::TimeDelta::FromMilliseconds(
+              kTestInputs[arraysize(kTestInputs) - 1 - j]));
+      EXPECT_EQ(kTestResults[i][j],
+                scheduler.NextCaptureDelay().InMilliseconds());
+    }
+  }
+}
+
+TEST(CaptureSchedulerTest, RollingAverageDifferentTimes) {
+  const int kTestResults[][arraysize(kTestInputs)] = {
+    { 360, 290, 233, 133, 80, 80, 133, 233 }, // One core.
+    { 180, 145, 116, 66, 50, 50, 66, 116 },   // Two cores.
+    { 90, 72, 58, 50, 50, 50, 50, 58 },       // Four cores.
+    { 50, 50, 50, 50, 50, 50, 50, 50 }        // Eight cores.
+  };
+
+  for (size_t i = 0; i < arraysize(kTestResults); ++i) {
+    CaptureScheduler scheduler;
+    scheduler.SetNumOfProcessorsForTest(1 << i);
+    for (size_t j = 0; j < arraysize(kTestInputs); ++j) {
+      scheduler.RecordCaptureTime(
+          base::TimeDelta::FromMilliseconds(kTestInputs[j]));
+      scheduler.RecordEncodeTime(
+          base::TimeDelta::FromMilliseconds(
+              kTestInputs[arraysize(kTestInputs) - 1 - j]));
+      EXPECT_EQ(kTestResults[i][j],
+                scheduler.NextCaptureDelay().InMilliseconds());
+    }
+  }
+}
+
+}  // namespace remoting