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/*
* Copyright (c) 2016 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/neteq/tick_timer.h"
#include <cstdint>
#include <memory>
#include "test/gtest.h"
namespace webrtc {
// Verify that the default value for ms_per_tick is 10.
TEST(TickTimer, DefaultMsPerTick) {
TickTimer tt;
EXPECT_EQ(10, tt.ms_per_tick());
}
TEST(TickTimer, CustomMsPerTick) {
TickTimer tt(17);
EXPECT_EQ(17, tt.ms_per_tick());
}
TEST(TickTimer, Increment) {
TickTimer tt;
EXPECT_EQ(0u, tt.ticks());
tt.Increment();
EXPECT_EQ(1u, tt.ticks());
for (int i = 0; i < 17; ++i) {
tt.Increment();
}
EXPECT_EQ(18u, tt.ticks());
tt.Increment(17);
EXPECT_EQ(35u, tt.ticks());
}
TEST(TickTimer, WrapAround) {
TickTimer tt;
tt.Increment(UINT64_MAX);
EXPECT_EQ(UINT64_MAX, tt.ticks());
tt.Increment();
EXPECT_EQ(0u, tt.ticks());
}
TEST(TickTimer, Stopwatch) {
TickTimer tt;
// Increment it a "random" number of steps.
tt.Increment(17);
std::unique_ptr<TickTimer::Stopwatch> sw = tt.GetNewStopwatch();
ASSERT_TRUE(sw);
EXPECT_EQ(0u, sw->ElapsedTicks()); // Starts at zero.
EXPECT_EQ(0u, sw->ElapsedMs());
tt.Increment();
EXPECT_EQ(1u, sw->ElapsedTicks()); // Increases with the TickTimer.
EXPECT_EQ(10u, sw->ElapsedMs());
}
TEST(TickTimer, StopwatchWrapAround) {
TickTimer tt;
tt.Increment(UINT64_MAX);
std::unique_ptr<TickTimer::Stopwatch> sw = tt.GetNewStopwatch();
ASSERT_TRUE(sw);
tt.Increment();
EXPECT_EQ(0u, tt.ticks());
EXPECT_EQ(1u, sw->ElapsedTicks());
EXPECT_EQ(10u, sw->ElapsedMs());
tt.Increment();
EXPECT_EQ(1u, tt.ticks());
EXPECT_EQ(2u, sw->ElapsedTicks());
EXPECT_EQ(20u, sw->ElapsedMs());
}
TEST(TickTimer, StopwatchMsOverflow) {
TickTimer tt;
std::unique_ptr<TickTimer::Stopwatch> sw = tt.GetNewStopwatch();
ASSERT_TRUE(sw);
tt.Increment(UINT64_MAX / 10);
EXPECT_EQ(UINT64_MAX, sw->ElapsedMs());
tt.Increment();
EXPECT_EQ(UINT64_MAX, sw->ElapsedMs());
tt.Increment(UINT64_MAX - tt.ticks());
EXPECT_EQ(UINT64_MAX, tt.ticks());
EXPECT_EQ(UINT64_MAX, sw->ElapsedMs());
}
TEST(TickTimer, StopwatchWithCustomTicktime) {
const int kMsPerTick = 17;
TickTimer tt(kMsPerTick);
std::unique_ptr<TickTimer::Stopwatch> sw = tt.GetNewStopwatch();
ASSERT_TRUE(sw);
EXPECT_EQ(0u, sw->ElapsedMs());
tt.Increment();
EXPECT_EQ(static_cast<uint64_t>(kMsPerTick), sw->ElapsedMs());
}
TEST(TickTimer, Countdown) {
TickTimer tt;
// Increment it a "random" number of steps.
tt.Increment(4711);
std::unique_ptr<TickTimer::Countdown> cd = tt.GetNewCountdown(17);
ASSERT_TRUE(cd);
EXPECT_FALSE(cd->Finished());
tt.Increment();
EXPECT_FALSE(cd->Finished());
tt.Increment(16); // Total increment is now 17.
EXPECT_TRUE(cd->Finished());
// Further increments do not change the state.
tt.Increment();
EXPECT_TRUE(cd->Finished());
tt.Increment(1234);
EXPECT_TRUE(cd->Finished());
}
} // namespace webrtc
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