chrome://profiler infrastructure uses base time types.

base/profiler/tracked_time_unittest.cc

-// Copyright (c) 2012 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 <stdint.h>
-
-#include "base/profiler/tracked_time.h"
-#include "base/time/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_t kSomeMilliseconds = 243;  // Some example times.
-  int64_t 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);
-  // Expect wrapping at 32 bits.
-  EXPECT_EQ(kSomeMilliseconds, (wrapped_big - TrackedTime()).InMilliseconds());
-}
-
-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).
-  ThreadData::InitializeAndSetTrackingStatus(ThreadData::DEACTIVATED);
-  // Since we disabled tracking, we should get a null response.
-  TrackedTime track_now = ThreadData::Now();
-  EXPECT_TRUE(track_now.is_null());
-}
-
-TEST(TrackedTimeTest, TrackedTimerEnabled) {
-  ThreadData::InitializeAndSetTrackingStatus(ThreadData::PROFILING_ACTIVE);
-  // 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