Index: media/base/moving_average_unittest.cc |
diff --git a/media/base/moving_average_unittest.cc b/media/base/moving_average_unittest.cc |
index da8e51922d8912bb50398fe7e7c51cd0c5afe1ea..39ad094231ae207c55f3606786e0976fdc687685 100644 |
--- a/media/base/moving_average_unittest.cc |
+++ b/media/base/moving_average_unittest.cc |
@@ -8,19 +8,30 @@ |
namespace media { |
-TEST(MovingAverageTest, Average) { |
+TEST(MovingAverageTest, AverageAndDeviation) { |
const int kSamples = 5; |
MovingAverage moving_average(kSamples); |
moving_average.AddSample(base::TimeDelta::FromSeconds(1)); |
EXPECT_EQ(base::TimeDelta::FromSeconds(1), moving_average.Average()); |
+ EXPECT_EQ(base::TimeDelta(), moving_average.Deviation()); |
+ |
for (int i = 0; i < kSamples - 1; ++i) |
moving_average.AddSample(base::TimeDelta::FromSeconds(1)); |
EXPECT_EQ(base::TimeDelta::FromSeconds(1), moving_average.Average()); |
+ EXPECT_EQ(base::TimeDelta(), moving_average.Deviation()); |
+ base::TimeDelta expect_deviation[] = { |
+ base::TimeDelta::FromMicroseconds(200000), |
+ base::TimeDelta::FromMicroseconds(244948), |
+ base::TimeDelta::FromMicroseconds(244948), |
+ base::TimeDelta::FromMicroseconds(200000), |
+ base::TimeDelta::FromMilliseconds(0), |
+ }; |
for (int i = 0; i < kSamples; ++i) { |
moving_average.AddSample(base::TimeDelta::FromMilliseconds(500)); |
EXPECT_EQ(base::TimeDelta::FromMilliseconds(1000 - (i + 1) * 100), |
moving_average.Average()); |
+ EXPECT_EQ(expect_deviation[i], moving_average.Deviation()); |
} |
} |
@@ -31,6 +42,7 @@ TEST(MovingAverageTest, Reset) { |
moving_average.Reset(); |
moving_average.AddSample(base::TimeDelta()); |
EXPECT_EQ(base::TimeDelta(), moving_average.Average()); |
+ EXPECT_EQ(base::TimeDelta(), moving_average.Deviation()); |
} |
} // namespace media |