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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Test of classes in tracked_time.cc
#include "base/profiler/tracked_time.h"
#include "base/time.h"
#include "base/tracked_objects.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace tracked_objects {
TEST(TrackedTimeTest, TrackedTimerMilliseconds) {
// First make sure we basicallly transfer simple milliseconds values as
// expected. Most critically, things should not become null.
int32 kSomeMilliseconds = 243; // Some example times.
int64 kReallyBigMilliseconds = (1LL << 35) + kSomeMilliseconds;
TrackedTime some = TrackedTime() +
Duration::FromMilliseconds(kSomeMilliseconds);
EXPECT_EQ(kSomeMilliseconds, (some - TrackedTime()).InMilliseconds());
EXPECT_FALSE(some.is_null());
// Now create a big time, to check that it is wrapped modulo 2^32.
base::TimeTicks big = base::TimeTicks() +
base::TimeDelta::FromMilliseconds(kReallyBigMilliseconds);
EXPECT_EQ(kReallyBigMilliseconds, (big - base::TimeTicks()).InMilliseconds());
TrackedTime wrapped_big(big);
#if defined(USE_FAST_TIME_CLASS_FOR_DURATION_CALCULATIONS)
// Expect wrapping at 32 bits.
EXPECT_EQ(kSomeMilliseconds, (wrapped_big - TrackedTime()).InMilliseconds());
#else // !USE_FAST_TIME_CLASS_FOR_DURATION_CALCULATIONS)
// Expect no wrapping at 32 bits.
EXPECT_EQ(kReallyBigMilliseconds,
(wrapped_big - TrackedTime()).InMilliseconds());
#endif // USE_FAST_TIME_CLASS_FOR_DURATION_CALCULATIONS)
}
TEST(TrackedTimeTest, TrackedTimerDuration) {
int kFirstMilliseconds = 793;
int kSecondMilliseconds = 14889;
Duration first = Duration::FromMilliseconds(kFirstMilliseconds);
Duration second = Duration::FromMilliseconds(kSecondMilliseconds);
EXPECT_EQ(kFirstMilliseconds, first.InMilliseconds());
EXPECT_EQ(kSecondMilliseconds, second.InMilliseconds());
Duration sum = first + second;
EXPECT_EQ(kFirstMilliseconds + kSecondMilliseconds, sum.InMilliseconds());
}
TEST(TrackedTimeTest, TrackedTimerVsTimeTicks) {
// Make sure that our 32 bit timer is aligned with the TimeTicks() timer.
// First get a 64 bit timer (which should not be null).
base::TimeTicks ticks_before = base::TimeTicks::Now();
EXPECT_FALSE(ticks_before.is_null());
// Then get a 32 bit timer that can be be null when it wraps.
TrackedTime now = TrackedTime::Now();
// Then get a bracketing time.
base::TimeTicks ticks_after = base::TimeTicks::Now();
EXPECT_FALSE(ticks_after.is_null());
// Now make sure that we bracketed our tracked time nicely.
Duration before = now - TrackedTime(ticks_before);
EXPECT_LE(0, before.InMilliseconds());
Duration after = now - TrackedTime(ticks_after);
EXPECT_GE(0, after.InMilliseconds());
}
TEST(TrackedTimeTest, TrackedTimerDisabled) {
// Check to be sure disabling the collection of data induces a null time
// (which we know will return much faster).
if (!ThreadData::InitializeAndSetTrackingStatus(false))
return;
// Since we disabled tracking, we should get a null response.
TrackedTime track_now = ThreadData::Now();
EXPECT_TRUE(track_now.is_null());
track_now = ThreadData::NowForStartOfRun(NULL);
EXPECT_TRUE(track_now.is_null());
track_now = ThreadData::NowForEndOfRun();
EXPECT_TRUE(track_now.is_null());
}
TEST(TrackedTimeTest, TrackedTimerEnabled) {
if (!ThreadData::InitializeAndSetTrackingStatus(true))
return;
// Make sure that when we enable tracking, we get a real timer result.
// First get a 64 bit timer (which should not be null).
base::TimeTicks ticks_before = base::TimeTicks::Now();
EXPECT_FALSE(ticks_before.is_null());
// Then get a 32 bit timer that can be null when it wraps.
// Crtical difference from the TrackedTimerVsTimeTicks test, is that we use
// ThreadData::Now(). It can sometimes return the null time.
TrackedTime now = ThreadData::Now();
// Then get a bracketing time.
base::TimeTicks ticks_after = base::TimeTicks::Now();
EXPECT_FALSE(ticks_after.is_null());
// Now make sure that we bracketed our tracked time nicely.
Duration before = now - TrackedTime(ticks_before);
EXPECT_LE(0, before.InMilliseconds());
Duration after = now - TrackedTime(ticks_after);
EXPECT_GE(0, after.InMilliseconds());
}
} // namespace tracked_objects
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