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/*
* 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 "api/units/data_rate.h"
#include "rtc_base/logging.h"
#include "test/gtest.h"
namespace webrtc {
namespace test {
TEST(DataRateTest, CompilesWithChecksAndLogs) {
DataRate a = DataRate::KilobitsPerSec(300);
DataRate b = DataRate::KilobitsPerSec(210);
RTC_CHECK_GT(a, b);
RTC_LOG(LS_INFO) << a;
}
TEST(DataRateTest, ConstExpr) {
constexpr int64_t kValue = 12345;
constexpr DataRate kDataRateZero = DataRate::Zero();
constexpr DataRate kDataRateInf = DataRate::Infinity();
static_assert(kDataRateZero.IsZero(), "");
static_assert(kDataRateInf.IsInfinite(), "");
static_assert(kDataRateInf.bps_or(-1) == -1, "");
static_assert(kDataRateInf > kDataRateZero, "");
constexpr DataRate kDataRateBps = DataRate::BitsPerSec(kValue);
constexpr DataRate kDataRateKbps = DataRate::KilobitsPerSec(kValue);
static_assert(kDataRateBps.bps<double>() == kValue, "");
static_assert(kDataRateBps.bps_or(0) == kValue, "");
static_assert(kDataRateKbps.kbps_or(0) == kValue, "");
}
TEST(DataRateTest, GetBackSameValues) {
const int64_t kValue = 123 * 8;
EXPECT_EQ(DataRate::BitsPerSec(kValue).bps(), kValue);
EXPECT_EQ(DataRate::KilobitsPerSec(kValue).kbps(), kValue);
}
TEST(DataRateTest, GetDifferentPrefix) {
const int64_t kValue = 123 * 8000;
EXPECT_EQ(DataRate::BitsPerSec(kValue).kbps(), kValue / 1000);
}
TEST(DataRateTest, IdentityChecks) {
const int64_t kValue = 3000;
EXPECT_TRUE(DataRate::Zero().IsZero());
EXPECT_FALSE(DataRate::BitsPerSec(kValue).IsZero());
EXPECT_TRUE(DataRate::Infinity().IsInfinite());
EXPECT_FALSE(DataRate::Zero().IsInfinite());
EXPECT_FALSE(DataRate::BitsPerSec(kValue).IsInfinite());
EXPECT_FALSE(DataRate::Infinity().IsFinite());
EXPECT_TRUE(DataRate::BitsPerSec(kValue).IsFinite());
EXPECT_TRUE(DataRate::Zero().IsFinite());
}
TEST(DataRateTest, ComparisonOperators) {
const int64_t kSmall = 450;
const int64_t kLarge = 451;
const DataRate small = DataRate::BitsPerSec(kSmall);
const DataRate large = DataRate::BitsPerSec(kLarge);
EXPECT_EQ(DataRate::Zero(), DataRate::BitsPerSec(0));
EXPECT_EQ(DataRate::Infinity(), DataRate::Infinity());
EXPECT_EQ(small, small);
EXPECT_LE(small, small);
EXPECT_GE(small, small);
EXPECT_NE(small, large);
EXPECT_LE(small, large);
EXPECT_LT(small, large);
EXPECT_GE(large, small);
EXPECT_GT(large, small);
EXPECT_LT(DataRate::Zero(), small);
EXPECT_GT(DataRate::Infinity(), large);
}
TEST(DataRateTest, ConvertsToAndFromDouble) {
const int64_t kValue = 128;
const double kDoubleValue = static_cast<double>(kValue);
const double kDoubleKbps = kValue * 1e-3;
const double kFloatKbps = static_cast<float>(kDoubleKbps);
EXPECT_EQ(DataRate::BitsPerSec(kValue).bps<double>(), kDoubleValue);
EXPECT_EQ(DataRate::BitsPerSec(kValue).kbps<double>(), kDoubleKbps);
EXPECT_EQ(DataRate::BitsPerSec(kValue).kbps<float>(), kFloatKbps);
EXPECT_EQ(DataRate::BitsPerSec(kDoubleValue).bps(), kValue);
EXPECT_EQ(DataRate::KilobitsPerSec(kDoubleKbps).bps(), kValue);
const double kInfinity = std::numeric_limits<double>::infinity();
EXPECT_EQ(DataRate::Infinity().bps<double>(), kInfinity);
EXPECT_TRUE(DataRate::BitsPerSec(kInfinity).IsInfinite());
EXPECT_TRUE(DataRate::KilobitsPerSec(kInfinity).IsInfinite());
}
TEST(DataRateTest, Clamping) {
const DataRate upper = DataRate::KilobitsPerSec(800);
const DataRate lower = DataRate::KilobitsPerSec(100);
const DataRate under = DataRate::KilobitsPerSec(100);
const DataRate inside = DataRate::KilobitsPerSec(500);
const DataRate over = DataRate::KilobitsPerSec(1000);
EXPECT_EQ(under.Clamped(lower, upper), lower);
EXPECT_EQ(inside.Clamped(lower, upper), inside);
EXPECT_EQ(over.Clamped(lower, upper), upper);
DataRate mutable_rate = lower;
mutable_rate.Clamp(lower, upper);
EXPECT_EQ(mutable_rate, lower);
mutable_rate = inside;
mutable_rate.Clamp(lower, upper);
EXPECT_EQ(mutable_rate, inside);
mutable_rate = over;
mutable_rate.Clamp(lower, upper);
EXPECT_EQ(mutable_rate, upper);
}
TEST(DataRateTest, MathOperations) {
const int64_t kValueA = 450;
const int64_t kValueB = 267;
const DataRate rate_a = DataRate::BitsPerSec(kValueA);
const DataRate rate_b = DataRate::BitsPerSec(kValueB);
const int32_t kInt32Value = 123;
const double kFloatValue = 123.0;
EXPECT_EQ((rate_a + rate_b).bps(), kValueA + kValueB);
EXPECT_EQ((rate_a - rate_b).bps(), kValueA - kValueB);
EXPECT_EQ((rate_a * kValueB).bps(), kValueA * kValueB);
EXPECT_EQ((rate_a * kInt32Value).bps(), kValueA * kInt32Value);
EXPECT_EQ((rate_a * kFloatValue).bps(), kValueA * kFloatValue);
EXPECT_EQ(rate_a / rate_b, static_cast<double>(kValueA) / kValueB);
EXPECT_EQ((rate_a / 10).bps(), kValueA / 10);
EXPECT_NEAR((rate_a / 0.5).bps(), kValueA * 2, 1);
DataRate mutable_rate = DataRate::BitsPerSec(kValueA);
mutable_rate += rate_b;
EXPECT_EQ(mutable_rate.bps(), kValueA + kValueB);
mutable_rate -= rate_a;
EXPECT_EQ(mutable_rate.bps(), kValueB);
}
TEST(UnitConversionTest, DataRateAndDataSizeAndTimeDelta) {
const int64_t kSeconds = 5;
const int64_t kBitsPerSecond = 440;
const int64_t kBytes = 44000;
const TimeDelta delta_a = TimeDelta::Seconds(kSeconds);
const DataRate rate_b = DataRate::BitsPerSec(kBitsPerSecond);
const DataSize size_c = DataSize::Bytes(kBytes);
EXPECT_EQ((delta_a * rate_b).bytes(), kSeconds * kBitsPerSecond / 8);
EXPECT_EQ((rate_b * delta_a).bytes(), kSeconds * kBitsPerSecond / 8);
EXPECT_EQ((size_c / delta_a).bps(), kBytes * 8 / kSeconds);
EXPECT_EQ((size_c / rate_b).seconds(), kBytes * 8 / kBitsPerSecond);
}
TEST(UnitConversionTest, DataRateAndDataSizeAndFrequency) {
const int64_t kHertz = 30;
const int64_t kBitsPerSecond = 96000;
const int64_t kBytes = 1200;
const Frequency freq_a = Frequency::Hertz(kHertz);
const DataRate rate_b = DataRate::BitsPerSec(kBitsPerSecond);
const DataSize size_c = DataSize::Bytes(kBytes);
EXPECT_EQ((freq_a * size_c).bps(), kHertz * kBytes * 8);
EXPECT_EQ((size_c * freq_a).bps(), kHertz * kBytes * 8);
EXPECT_EQ((rate_b / size_c).hertz<int64_t>(), kBitsPerSecond / kBytes / 8);
EXPECT_EQ((rate_b / freq_a).bytes(), kBitsPerSecond / kHertz / 8);
}
TEST(UnitConversionDeathTest, DivisionFailsOnLargeSize) {
// Note that the failure is expected since the current implementation is
// implementated in a way that does not support division of large sizes. If
// the implementation is changed, this test can safely be removed.
const int64_t kJustSmallEnoughForDivision =
std::numeric_limits<int64_t>::max() / 8000000;
const DataSize large_size = DataSize::Bytes(kJustSmallEnoughForDivision);
const DataRate data_rate = DataRate::KilobitsPerSec(100);
const TimeDelta time_delta = TimeDelta::Millis(100);
EXPECT_TRUE((large_size / data_rate).IsFinite());
EXPECT_TRUE((large_size / time_delta).IsFinite());
#if GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID) && RTC_DCHECK_IS_ON
const int64_t kToolargeForDivision = kJustSmallEnoughForDivision + 1;
const DataSize too_large_size = DataSize::Bytes(kToolargeForDivision);
EXPECT_DEATH(too_large_size / data_rate, "");
EXPECT_DEATH(too_large_size / time_delta, "");
#endif // GTEST_HAS_DEATH_TEST && !!defined(WEBRTC_ANDROID) && RTC_DCHECK_IS_ON
}
} // namespace test
} // namespace webrtc
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