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/*
* 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 "api/units/frequency.h"
#include <cstdint>
#include "api/units/time_delta.h"
#include "test/gtest.h"
namespace webrtc {
namespace test {
TEST(FrequencyTest, ConstExpr) {
constexpr Frequency kFrequencyZero = Frequency::Zero();
constexpr Frequency kFrequencyPlusInf = Frequency::PlusInfinity();
constexpr Frequency kFrequencyMinusInf = Frequency::MinusInfinity();
static_assert(Frequency() == kFrequencyZero);
static_assert(kFrequencyZero.IsZero(), "");
static_assert(kFrequencyPlusInf.IsPlusInfinity(), "");
static_assert(kFrequencyMinusInf.IsMinusInfinity(), "");
static_assert(kFrequencyPlusInf > kFrequencyZero, "");
}
TEST(FrequencyTest, GetBackSameValues) {
const int64_t kValue = 31;
EXPECT_EQ(Frequency::Hertz(kValue).hertz<int64_t>(), kValue);
EXPECT_EQ(Frequency::Zero().hertz<int64_t>(), 0);
}
TEST(FrequencyTest, GetDifferentPrefix) {
const int64_t kValue = 30000;
EXPECT_EQ(Frequency::MilliHertz(kValue).hertz<int64_t>(), kValue / 1000);
EXPECT_EQ(Frequency::Hertz(kValue).millihertz(), kValue * 1000);
EXPECT_EQ(Frequency::KiloHertz(kValue).hertz(), kValue * 1000);
}
TEST(FrequencyTest, IdentityChecks) {
const int64_t kValue = 31;
EXPECT_TRUE(Frequency::Zero().IsZero());
EXPECT_FALSE(Frequency::Hertz(kValue).IsZero());
EXPECT_TRUE(Frequency::PlusInfinity().IsInfinite());
EXPECT_TRUE(Frequency::MinusInfinity().IsInfinite());
EXPECT_FALSE(Frequency::Zero().IsInfinite());
EXPECT_FALSE(Frequency::Hertz(kValue).IsInfinite());
EXPECT_FALSE(Frequency::PlusInfinity().IsFinite());
EXPECT_FALSE(Frequency::MinusInfinity().IsFinite());
EXPECT_TRUE(Frequency::Hertz(kValue).IsFinite());
EXPECT_TRUE(Frequency::Zero().IsFinite());
EXPECT_TRUE(Frequency::PlusInfinity().IsPlusInfinity());
EXPECT_FALSE(Frequency::MinusInfinity().IsPlusInfinity());
EXPECT_TRUE(Frequency::MinusInfinity().IsMinusInfinity());
EXPECT_FALSE(Frequency::PlusInfinity().IsMinusInfinity());
}
TEST(FrequencyTest, ComparisonOperators) {
const int64_t kSmall = 42;
const int64_t kLarge = 45;
const Frequency small = Frequency::Hertz(kSmall);
const Frequency large = Frequency::Hertz(kLarge);
EXPECT_EQ(Frequency::Zero(), Frequency::Hertz(0));
EXPECT_EQ(Frequency::PlusInfinity(), Frequency::PlusInfinity());
EXPECT_EQ(small, Frequency::Hertz(kSmall));
EXPECT_LE(small, Frequency::Hertz(kSmall));
EXPECT_GE(small, Frequency::Hertz(kSmall));
EXPECT_NE(small, Frequency::Hertz(kLarge));
EXPECT_LE(small, Frequency::Hertz(kLarge));
EXPECT_LT(small, Frequency::Hertz(kLarge));
EXPECT_GE(large, Frequency::Hertz(kSmall));
EXPECT_GT(large, Frequency::Hertz(kSmall));
EXPECT_LT(Frequency::Zero(), small);
EXPECT_GT(Frequency::PlusInfinity(), large);
EXPECT_LT(Frequency::MinusInfinity(), Frequency::Zero());
}
TEST(FrequencyTest, Clamping) {
const Frequency upper = Frequency::Hertz(800);
const Frequency lower = Frequency::Hertz(100);
const Frequency under = Frequency::Hertz(100);
const Frequency inside = Frequency::Hertz(500);
const Frequency over = Frequency::Hertz(1000);
EXPECT_EQ(under.Clamped(lower, upper), lower);
EXPECT_EQ(inside.Clamped(lower, upper), inside);
EXPECT_EQ(over.Clamped(lower, upper), upper);
Frequency mutable_frequency = lower;
mutable_frequency.Clamp(lower, upper);
EXPECT_EQ(mutable_frequency, lower);
mutable_frequency = inside;
mutable_frequency.Clamp(lower, upper);
EXPECT_EQ(mutable_frequency, inside);
mutable_frequency = over;
mutable_frequency.Clamp(lower, upper);
EXPECT_EQ(mutable_frequency, upper);
}
TEST(FrequencyTest, MathOperations) {
const int64_t kValueA = 457;
const int64_t kValueB = 260;
const Frequency frequency_a = Frequency::Hertz(kValueA);
const Frequency frequency_b = Frequency::Hertz(kValueB);
EXPECT_EQ((frequency_a + frequency_b).hertz<int64_t>(), kValueA + kValueB);
EXPECT_EQ((frequency_a - frequency_b).hertz<int64_t>(), kValueA - kValueB);
EXPECT_EQ((Frequency::Hertz(kValueA) * kValueB).hertz<int64_t>(),
kValueA * kValueB);
EXPECT_EQ((frequency_b / 10).hertz<int64_t>(), kValueB / 10);
EXPECT_EQ(frequency_b / frequency_a, static_cast<double>(kValueB) / kValueA);
Frequency mutable_frequency = Frequency::Hertz(kValueA);
mutable_frequency += Frequency::Hertz(kValueB);
EXPECT_EQ(mutable_frequency, Frequency::Hertz(kValueA + kValueB));
mutable_frequency -= Frequency::Hertz(kValueB);
EXPECT_EQ(mutable_frequency, Frequency::Hertz(kValueA));
}
TEST(FrequencyTest, Rounding) {
const Frequency freq_high = Frequency::Hertz(23.976);
EXPECT_EQ(freq_high.hertz(), 24);
EXPECT_EQ(freq_high.RoundDownTo(Frequency::Hertz(1)), Frequency::Hertz(23));
EXPECT_EQ(freq_high.RoundTo(Frequency::Hertz(1)), Frequency::Hertz(24));
EXPECT_EQ(freq_high.RoundUpTo(Frequency::Hertz(1)), Frequency::Hertz(24));
const Frequency freq_low = Frequency::Hertz(23.4);
EXPECT_EQ(freq_low.hertz(), 23);
EXPECT_EQ(freq_low.RoundDownTo(Frequency::Hertz(1)), Frequency::Hertz(23));
EXPECT_EQ(freq_low.RoundTo(Frequency::Hertz(1)), Frequency::Hertz(23));
EXPECT_EQ(freq_low.RoundUpTo(Frequency::Hertz(1)), Frequency::Hertz(24));
}
TEST(FrequencyTest, InfinityOperations) {
const double kValue = 267;
const Frequency finite = Frequency::Hertz(kValue);
EXPECT_TRUE((Frequency::PlusInfinity() + finite).IsPlusInfinity());
EXPECT_TRUE((Frequency::PlusInfinity() - finite).IsPlusInfinity());
EXPECT_TRUE((finite + Frequency::PlusInfinity()).IsPlusInfinity());
EXPECT_TRUE((finite - Frequency::MinusInfinity()).IsPlusInfinity());
EXPECT_TRUE((Frequency::MinusInfinity() + finite).IsMinusInfinity());
EXPECT_TRUE((Frequency::MinusInfinity() - finite).IsMinusInfinity());
EXPECT_TRUE((finite + Frequency::MinusInfinity()).IsMinusInfinity());
EXPECT_TRUE((finite - Frequency::PlusInfinity()).IsMinusInfinity());
}
TEST(UnitConversionTest, TimeDeltaAndFrequency) {
EXPECT_EQ(1 / Frequency::Hertz(50), TimeDelta::Millis(20));
EXPECT_EQ(1 / TimeDelta::Millis(20), Frequency::Hertz(50));
EXPECT_EQ(Frequency::KiloHertz(200) * TimeDelta::Millis(2), 400.0);
}
} // namespace test
} // namespace webrtc
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