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/*
* Copyright 2004 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 "rtc_base/time_utils.h"
#include <memory>
#include "api/units/time_delta.h"
#include "rtc_base/event.h"
#include "rtc_base/fake_clock.h"
#include "rtc_base/helpers.h"
#include "rtc_base/thread.h"
#include "test/gtest.h"
namespace rtc {
using ::webrtc::TimeDelta;
TEST(TimeTest, TimeInMs) {
int64_t ts_earlier = TimeMillis();
Thread::SleepMs(100);
int64_t ts_now = TimeMillis();
// Allow for the thread to wakeup ~20ms early.
EXPECT_GE(ts_now, ts_earlier + 80);
// Make sure the Time is not returning in smaller unit like microseconds.
EXPECT_LT(ts_now, ts_earlier + 1000);
}
TEST(TimeTest, Intervals) {
int64_t ts_earlier = TimeMillis();
int64_t ts_later = TimeAfter(500);
// We can't depend on ts_later and ts_earlier to be exactly 500 apart
// since time elapses between the calls to TimeMillis() and TimeAfter(500)
EXPECT_LE(500, TimeDiff(ts_later, ts_earlier));
EXPECT_GE(-500, TimeDiff(ts_earlier, ts_later));
// Time has elapsed since ts_earlier
EXPECT_GE(TimeSince(ts_earlier), 0);
// ts_earlier is earlier than now, so TimeUntil ts_earlier is -ve
EXPECT_LE(TimeUntil(ts_earlier), 0);
// ts_later likely hasn't happened yet, so TimeSince could be -ve
// but within 500
EXPECT_GE(TimeSince(ts_later), -500);
// TimeUntil ts_later is at most 500
EXPECT_LE(TimeUntil(ts_later), 500);
}
TEST(TimeTest, TestTimeDiff64) {
int64_t ts_diff = 100;
int64_t ts_earlier = rtc::TimeMillis();
int64_t ts_later = ts_earlier + ts_diff;
EXPECT_EQ(ts_diff, rtc::TimeDiff(ts_later, ts_earlier));
EXPECT_EQ(-ts_diff, rtc::TimeDiff(ts_earlier, ts_later));
}
class TmToSeconds : public ::testing::Test {
public:
TmToSeconds() {
// Set use of the test RNG to get deterministic expiration timestamp.
rtc::SetRandomTestMode(true);
}
~TmToSeconds() override {
// Put it back for the next test.
rtc::SetRandomTestMode(false);
}
void TestTmToSeconds(int times) {
static char mdays[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
for (int i = 0; i < times; i++) {
// First generate something correct and check that TmToSeconds is happy.
int year = rtc::CreateRandomId() % 400 + 1970;
bool leap_year = false;
if (year % 4 == 0)
leap_year = true;
if (year % 100 == 0)
leap_year = false;
if (year % 400 == 0)
leap_year = true;
std::tm tm;
tm.tm_year = year - 1900; // std::tm is year 1900 based.
tm.tm_mon = rtc::CreateRandomId() % 12;
tm.tm_mday = rtc::CreateRandomId() % mdays[tm.tm_mon] + 1;
tm.tm_hour = rtc::CreateRandomId() % 24;
tm.tm_min = rtc::CreateRandomId() % 60;
tm.tm_sec = rtc::CreateRandomId() % 60;
int64_t t = rtc::TmToSeconds(tm);
EXPECT_TRUE(t >= 0);
// Now damage a random field and check that TmToSeconds is unhappy.
switch (rtc::CreateRandomId() % 11) {
case 0:
tm.tm_year = 1969 - 1900;
break;
case 1:
tm.tm_mon = -1;
break;
case 2:
tm.tm_mon = 12;
break;
case 3:
tm.tm_mday = 0;
break;
case 4:
tm.tm_mday = mdays[tm.tm_mon] + (leap_year && tm.tm_mon == 1) + 1;
break;
case 5:
tm.tm_hour = -1;
break;
case 6:
tm.tm_hour = 24;
break;
case 7:
tm.tm_min = -1;
break;
case 8:
tm.tm_min = 60;
break;
case 9:
tm.tm_sec = -1;
break;
case 10:
tm.tm_sec = 60;
break;
}
EXPECT_EQ(rtc::TmToSeconds(tm), -1);
}
// Check consistency with the system gmtime_r. With time_t, we can only
// portably test dates until 2038, which is achieved by the % 0x80000000.
for (int i = 0; i < times; i++) {
time_t t = rtc::CreateRandomId() % 0x80000000;
#if defined(WEBRTC_WIN)
std::tm* tm = std::gmtime(&t);
EXPECT_TRUE(tm);
EXPECT_TRUE(rtc::TmToSeconds(*tm) == t);
#else
std::tm tm;
EXPECT_TRUE(gmtime_r(&t, &tm));
EXPECT_TRUE(rtc::TmToSeconds(tm) == t);
#endif
}
}
};
TEST_F(TmToSeconds, TestTmToSeconds) {
TestTmToSeconds(100000);
}
// Test that all the time functions exposed by TimeUtils get time from the
// fake clock when it's set.
TEST(FakeClock, TimeFunctionsUseFakeClock) {
FakeClock clock;
SetClockForTesting(&clock);
clock.SetTime(webrtc::Timestamp::Micros(987654));
EXPECT_EQ(987u, Time32());
EXPECT_EQ(987, TimeMillis());
EXPECT_EQ(987654, TimeMicros());
EXPECT_EQ(987654000, TimeNanos());
EXPECT_EQ(1000u, TimeAfter(13));
SetClockForTesting(nullptr);
// After it's unset, we should get a normal time.
EXPECT_NE(987, TimeMillis());
}
TEST(FakeClock, InitialTime) {
FakeClock clock;
EXPECT_EQ(0, clock.TimeNanos());
}
TEST(FakeClock, SetTime) {
FakeClock clock;
clock.SetTime(webrtc::Timestamp::Micros(123));
EXPECT_EQ(123000, clock.TimeNanos());
clock.SetTime(webrtc::Timestamp::Micros(456));
EXPECT_EQ(456000, clock.TimeNanos());
}
TEST(FakeClock, AdvanceTime) {
FakeClock clock;
clock.AdvanceTime(webrtc::TimeDelta::Micros(1u));
EXPECT_EQ(1000, clock.TimeNanos());
clock.AdvanceTime(webrtc::TimeDelta::Micros(2222u));
EXPECT_EQ(2223000, clock.TimeNanos());
clock.AdvanceTime(webrtc::TimeDelta::Millis(3333u));
EXPECT_EQ(3335223000, clock.TimeNanos());
clock.AdvanceTime(webrtc::TimeDelta::Seconds(4444u));
EXPECT_EQ(4447335223000, clock.TimeNanos());
}
// When the clock is advanced, threads that are waiting in a socket select
// should wake up and look at the new time. This allows tests using the
// fake clock to run much faster, if the test is bound by time constraints
// (such as a test for a STUN ping timeout).
TEST(FakeClock, SettingTimeWakesThreads) {
int64_t real_start_time_ms = TimeMillis();
ThreadProcessingFakeClock clock;
SetClockForTesting(&clock);
std::unique_ptr<Thread> worker(Thread::CreateWithSocketServer());
worker->Start();
// Post an event that won't be executed for 10 seconds.
Event message_handler_dispatched;
worker->PostDelayedTask(
[&message_handler_dispatched] { message_handler_dispatched.Set(); },
TimeDelta::Seconds(60));
// Wait for a bit for the worker thread to be started and enter its socket
// select(). Otherwise this test would be trivial since the worker thread
// would process the event as soon as it was started.
Thread::Current()->SleepMs(1000);
// Advance the fake clock, expecting the worker thread to wake up
// and dispatch the message instantly.
clock.AdvanceTime(webrtc::TimeDelta::Seconds(60u));
EXPECT_TRUE(message_handler_dispatched.Wait(webrtc::TimeDelta::Zero()));
worker->Stop();
SetClockForTesting(nullptr);
// The message should have been dispatched long before the 60 seconds fully
// elapsed (just a sanity check).
int64_t real_end_time_ms = TimeMillis();
EXPECT_LT(real_end_time_ms - real_start_time_ms, 10000);
}
} // namespace rtc
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