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Diffstat (limited to 'third_party/libwebrtc/video/unique_timestamp_counter_unittest.cc')
-rw-r--r-- | third_party/libwebrtc/video/unique_timestamp_counter_unittest.cc | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/third_party/libwebrtc/video/unique_timestamp_counter_unittest.cc b/third_party/libwebrtc/video/unique_timestamp_counter_unittest.cc new file mode 100644 index 0000000000..b703e84576 --- /dev/null +++ b/third_party/libwebrtc/video/unique_timestamp_counter_unittest.cc @@ -0,0 +1,52 @@ +/* + * Copyright (c) 2019 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 "video/unique_timestamp_counter.h" + +#include "test/gtest.h" + +namespace webrtc { +namespace { + +TEST(UniqueTimestampCounterTest, InitiallyZero) { + UniqueTimestampCounter counter; + EXPECT_EQ(counter.GetUniqueSeen(), 0); +} + +TEST(UniqueTimestampCounterTest, CountsUniqueValues) { + UniqueTimestampCounter counter; + counter.Add(100); + counter.Add(100); + counter.Add(200); + counter.Add(150); + counter.Add(100); + EXPECT_EQ(counter.GetUniqueSeen(), 3); +} + +TEST(UniqueTimestampCounterTest, ForgetsOldValuesAfter1000NewValues) { + const int kNumValues = 1500; + const int kMaxHistory = 1000; + const uint32_t value = 0xFFFFFFF0; + UniqueTimestampCounter counter; + for (int i = 0; i < kNumValues; ++i) { + counter.Add(value + 10 * i); + } + ASSERT_EQ(counter.GetUniqueSeen(), kNumValues); + // Slightly old values not affect number of seen unique values. + for (int i = kNumValues - kMaxHistory; i < kNumValues; ++i) { + counter.Add(value + 10 * i); + } + EXPECT_EQ(counter.GetUniqueSeen(), kNumValues); + // Very old value will be treated as unique. + counter.Add(value); + EXPECT_EQ(counter.GetUniqueSeen(), kNumValues + 1); +} + +} // namespace +} // namespace webrtc |