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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 // Test of classes in tracked_time.cc |
| 6 |
| 7 #include "base/profiler/tracked_time.h" |
| 8 #include "base/time.h" |
| 9 #include "base/tracked_objects.h" |
| 10 #include "testing/gtest/include/gtest/gtest.h" |
| 11 |
| 12 namespace tracked_objects { |
| 13 |
| 14 TEST(TrackedTimeTest, TrackedTimerMilliseconds) { |
| 15 // First make sure we basicallly transfer simple milliseconds values as |
| 16 // expected. Most critically, things should not become null. |
| 17 int32 kSomeMilliseconds = 243; // Some example times. |
| 18 int64 kReallyBigMilliseconds = (1LL << 35) + kSomeMilliseconds; |
| 19 |
| 20 TrackedTime some = TrackedTime() + |
| 21 Duration::FromMilliseconds(kSomeMilliseconds); |
| 22 EXPECT_EQ(kSomeMilliseconds, (some - TrackedTime()).InMilliseconds()); |
| 23 EXPECT_FALSE(some.is_null()); |
| 24 |
| 25 // Now create a big time, to check that it is wrapped modulo 2^32. |
| 26 base::TimeTicks big = base::TimeTicks() + |
| 27 base::TimeDelta::FromMilliseconds(kReallyBigMilliseconds); |
| 28 EXPECT_EQ(kReallyBigMilliseconds, (big - base::TimeTicks()).InMilliseconds()); |
| 29 |
| 30 TrackedTime wrapped_big(big); |
| 31 #if defined(USE_FAST_TIME_CLASS_FOR_DURATION_CALCULATIONS) |
| 32 // Expect wrapping at 32 bits. |
| 33 EXPECT_EQ(kSomeMilliseconds, (wrapped_big - TrackedTime()).InMilliseconds()); |
| 34 #else // !USE_FAST_TIME_CLASS_FOR_DURATION_CALCULATIONS) |
| 35 // Expect no wrapping at 32 bits. |
| 36 EXPECT_EQ(kReallyBigMilliseconds, |
| 37 (wrapped_big - TrackedTime()).InMilliseconds()); |
| 38 #endif // USE_FAST_TIME_CLASS_FOR_DURATION_CALCULATIONS) |
| 39 } |
| 40 |
| 41 TEST(TrackedTimeTest, TrackedTimerDuration) { |
| 42 int kFirstMilliseconds = 793; |
| 43 int kSecondMilliseconds = 14889; |
| 44 |
| 45 Duration first = Duration::FromMilliseconds(kFirstMilliseconds); |
| 46 Duration second = Duration::FromMilliseconds(kSecondMilliseconds); |
| 47 |
| 48 EXPECT_EQ(kFirstMilliseconds, first.InMilliseconds()); |
| 49 EXPECT_EQ(kSecondMilliseconds, second.InMilliseconds()); |
| 50 |
| 51 Duration sum = first + second; |
| 52 EXPECT_EQ(kFirstMilliseconds + kSecondMilliseconds, sum.InMilliseconds()); |
| 53 } |
| 54 |
| 55 TEST(TrackedTimeTest, TrackedTimerVsTimeTicks) { |
| 56 // Make sure that our 32 bit timer is aligned with the TimeTicks() timer. |
| 57 |
| 58 // First get a 64 bit timer (which should not be null). |
| 59 base::TimeTicks ticks_before = base::TimeTicks::Now(); |
| 60 EXPECT_FALSE(ticks_before.is_null()); |
| 61 |
| 62 // Then get a 32 bit timer that can be be null when it wraps. |
| 63 TrackedTime now = TrackedTime::Now(); |
| 64 |
| 65 // Then get a bracketing time. |
| 66 base::TimeTicks ticks_after = base::TimeTicks::Now(); |
| 67 EXPECT_FALSE(ticks_after.is_null()); |
| 68 |
| 69 // Now make sure that we bracketed our tracked time nicely. |
| 70 Duration before = now - TrackedTime(ticks_before); |
| 71 EXPECT_LE(0, before.InMilliseconds()); |
| 72 Duration after = now - TrackedTime(ticks_after); |
| 73 EXPECT_GE(0, after.InMilliseconds()); |
| 74 } |
| 75 |
| 76 TEST(TrackedTimeTest, TrackedTimerDisabled) { |
| 77 // Check to be sure disabling the collection of data induces a null time |
| 78 // (which we know will return much faster). |
| 79 if (!ThreadData::InitializeAndSetTrackingStatus(false)) |
| 80 return; |
| 81 // Since we disabled tracking, we should get a null response. |
| 82 TrackedTime track_now = ThreadData::Now(); |
| 83 EXPECT_TRUE(track_now.is_null()); |
| 84 } |
| 85 |
| 86 TEST(TrackedTimeTest, TrackedTimerEnabled) { |
| 87 if (!ThreadData::InitializeAndSetTrackingStatus(true)) |
| 88 return; |
| 89 // Make sure that when we enable tracking, we get a real timer result. |
| 90 |
| 91 // First get a 64 bit timer (which should not be null). |
| 92 base::TimeTicks ticks_before = base::TimeTicks::Now(); |
| 93 EXPECT_FALSE(ticks_before.is_null()); |
| 94 |
| 95 // Then get a 32 bit timer that can be null when it wraps. |
| 96 // Crtical difference from the TrackedTimerVsTimeTicks test, is that we use |
| 97 // ThreadData::Now(). It can sometimes return the null time. |
| 98 TrackedTime now = ThreadData::Now(); |
| 99 |
| 100 // Then get a bracketing time. |
| 101 base::TimeTicks ticks_after = base::TimeTicks::Now(); |
| 102 EXPECT_FALSE(ticks_after.is_null()); |
| 103 |
| 104 // Now make sure that we bracketed our tracked time nicely. |
| 105 Duration before = now - TrackedTime(ticks_before); |
| 106 EXPECT_LE(0, before.InMilliseconds()); |
| 107 Duration after = now - TrackedTime(ticks_after); |
| 108 EXPECT_GE(0, after.InMilliseconds()); |
| 109 } |
| 110 |
| 111 } // namespace tracked_objects |
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