1 files changed, 87 insertions, 0 deletions
diff --git a/third_party/libwebrtc/rtc_base/numerics/moving_average_unittest.cc b/third_party/libwebrtc/rtc_base/numerics/moving_average_unittest.cc
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+++ b/third_party/libwebrtc/rtc_base/numerics/moving_average_unittest.cc
@@ -0,0 +1,87 @@
+/*
+ *  Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "rtc_base/numerics/moving_average.h"
+
+#include "test/gtest.h"
+
+namespace test {
+
+TEST(MovingAverageTest, EmptyAverage) {
+  rtc::MovingAverage moving_average(1);
+  EXPECT_EQ(0u, moving_average.Size());
+  EXPECT_EQ(absl::nullopt, moving_average.GetAverageRoundedDown());
+}
+
+// Test single value.
+TEST(MovingAverageTest, OneElement) {
+  rtc::MovingAverage moving_average(1);
+  moving_average.AddSample(3);
+  EXPECT_EQ(1u, moving_average.Size());
+  EXPECT_EQ(3, *moving_average.GetAverageRoundedDown());
+}
+
+TEST(MovingAverageTest, GetAverage) {
+  rtc::MovingAverage moving_average(1024);
+  moving_average.AddSample(1);
+  moving_average.AddSample(1);
+  moving_average.AddSample(3);
+  moving_average.AddSample(3);
+  EXPECT_EQ(*moving_average.GetAverageRoundedDown(), 2);
+  EXPECT_EQ(*moving_average.GetAverageRoundedToClosest(), 2);
+}
+
+TEST(MovingAverageTest, GetAverageRoundedDownRounds) {
+  rtc::MovingAverage moving_average(1024);
+  moving_average.AddSample(1);
+  moving_average.AddSample(2);
+  moving_average.AddSample(2);
+  moving_average.AddSample(2);
+  EXPECT_EQ(*moving_average.GetAverageRoundedDown(), 1);
+}
+
+TEST(MovingAverageTest, GetAverageRoundedToClosestRounds) {
+  rtc::MovingAverage moving_average(1024);
+  moving_average.AddSample(1);
+  moving_average.AddSample(2);
+  moving_average.AddSample(2);
+  moving_average.AddSample(2);
+  EXPECT_EQ(*moving_average.GetAverageRoundedToClosest(), 2);
+}
+
+TEST(MovingAverageTest, Reset) {
+  rtc::MovingAverage moving_average(5);
+  moving_average.AddSample(1);
+  EXPECT_EQ(1, *moving_average.GetAverageRoundedDown());
+  EXPECT_EQ(1, *moving_average.GetAverageRoundedToClosest());
+
+  moving_average.Reset();
+
+  EXPECT_FALSE(moving_average.GetAverageRoundedDown());
+  moving_average.AddSample(10);
+  EXPECT_EQ(10, *moving_average.GetAverageRoundedDown());
+  EXPECT_EQ(10, *moving_average.GetAverageRoundedToClosest());
+}
+
+TEST(MovingAverageTest, ManySamples) {
+  rtc::MovingAverage moving_average(10);
+  for (int i = 1; i < 11; i++) {
+    moving_average.AddSample(i);
+  }
+  EXPECT_EQ(*moving_average.GetAverageRoundedDown(), 5);
+  EXPECT_EQ(*moving_average.GetAverageRoundedToClosest(), 6);
+  for (int i = 1; i < 2001; i++) {
+    moving_average.AddSample(i);
+  }
+  EXPECT_EQ(*moving_average.GetAverageRoundedDown(), 1995);
+  EXPECT_EQ(*moving_average.GetAverageRoundedToClosest(), 1996);
+}
+
+}  // namespace test