1 // Copyright (c) 2012 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/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 // Expect wrapping at 32 bits. 32 EXPECT_EQ(kSomeMilliseconds, (wrapped_big - TrackedTime()).InMilliseconds()); 33 } 34 35 TEST(TrackedTimeTest, TrackedTimerDuration) { 36 int kFirstMilliseconds = 793; 37 int kSecondMilliseconds = 14889; 38 39 Duration first = Duration::FromMilliseconds(kFirstMilliseconds); 40 Duration second = Duration::FromMilliseconds(kSecondMilliseconds); 41 42 EXPECT_EQ(kFirstMilliseconds, first.InMilliseconds()); 43 EXPECT_EQ(kSecondMilliseconds, second.InMilliseconds()); 44 45 Duration sum = first + second; 46 EXPECT_EQ(kFirstMilliseconds + kSecondMilliseconds, sum.InMilliseconds()); 47 } 48 49 TEST(TrackedTimeTest, TrackedTimerVsTimeTicks) { 50 // Make sure that our 32 bit timer is aligned with the TimeTicks() timer. 51 52 // First get a 64 bit timer (which should not be null). 53 base::TimeTicks ticks_before = base::TimeTicks::Now(); 54 EXPECT_FALSE(ticks_before.is_null()); 55 56 // Then get a 32 bit timer that can be be null when it wraps. 57 TrackedTime now = TrackedTime::Now(); 58 59 // Then get a bracketing time. 60 base::TimeTicks ticks_after = base::TimeTicks::Now(); 61 EXPECT_FALSE(ticks_after.is_null()); 62 63 // Now make sure that we bracketed our tracked time nicely. 64 Duration before = now - TrackedTime(ticks_before); 65 EXPECT_LE(0, before.InMilliseconds()); 66 Duration after = now - TrackedTime(ticks_after); 67 EXPECT_GE(0, after.InMilliseconds()); 68 } 69 70 TEST(TrackedTimeTest, TrackedTimerDisabled) { 71 // Check to be sure disabling the collection of data induces a null time 72 // (which we know will return much faster). 73 if (!ThreadData::InitializeAndSetTrackingStatus(ThreadData::DEACTIVATED)) 74 return; 75 // Since we disabled tracking, we should get a null response. 76 TrackedTime track_now = ThreadData::Now(); 77 EXPECT_TRUE(track_now.is_null()); 78 track_now = ThreadData::NowForStartOfRun(NULL); 79 EXPECT_TRUE(track_now.is_null()); 80 track_now = ThreadData::NowForEndOfRun(); 81 EXPECT_TRUE(track_now.is_null()); 82 } 83 84 TEST(TrackedTimeTest, TrackedTimerEnabled) { 85 if (!ThreadData::InitializeAndSetTrackingStatus( 86 ThreadData::PROFILING_CHILDREN_ACTIVE)) 87 return; 88 // Make sure that when we enable tracking, we get a real timer result. 89 90 // First get a 64 bit timer (which should not be null). 91 base::TimeTicks ticks_before = base::TimeTicks::Now(); 92 EXPECT_FALSE(ticks_before.is_null()); 93 94 // Then get a 32 bit timer that can be null when it wraps. 95 // Crtical difference from the TrackedTimerVsTimeTicks test, is that we use 96 // ThreadData::Now(). It can sometimes return the null time. 97 TrackedTime now = ThreadData::Now(); 98 99 // Then get a bracketing time. 100 base::TimeTicks ticks_after = base::TimeTicks::Now(); 101 EXPECT_FALSE(ticks_after.is_null()); 102 103 // Now make sure that we bracketed our tracked time nicely. 104 Duration before = now - TrackedTime(ticks_before); 105 EXPECT_LE(0, before.InMilliseconds()); 106 Duration after = now - TrackedTime(ticks_after); 107 EXPECT_GE(0, after.InMilliseconds()); 108 } 109 110 } // namespace tracked_objects 111
