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 <stdint.h> 8 9 #include "base/profiler/tracked_time.h" 10 #include "base/time/time.h" 11 #include "base/tracked_objects.h" 12 #include "testing/gtest/include/gtest/gtest.h" 13 14 namespace tracked_objects { 15 16 TEST(TrackedTimeTest, TrackedTimerMilliseconds) { 17 // First make sure we basicallly transfer simple milliseconds values as 18 // expected. Most critically, things should not become null. 19 int32_t kSomeMilliseconds = 243; // Some example times. 20 int64_t kReallyBigMilliseconds = (1LL << 35) + kSomeMilliseconds; 21 22 TrackedTime some = TrackedTime() + 23 Duration::FromMilliseconds(kSomeMilliseconds); 24 EXPECT_EQ(kSomeMilliseconds, (some - TrackedTime()).InMilliseconds()); 25 EXPECT_FALSE(some.is_null()); 26 27 // Now create a big time, to check that it is wrapped modulo 2^32. 28 base::TimeTicks big = base::TimeTicks() + 29 base::TimeDelta::FromMilliseconds(kReallyBigMilliseconds); 30 EXPECT_EQ(kReallyBigMilliseconds, (big - base::TimeTicks()).InMilliseconds()); 31 32 TrackedTime wrapped_big(big); 33 // Expect wrapping at 32 bits. 34 EXPECT_EQ(kSomeMilliseconds, (wrapped_big - TrackedTime()).InMilliseconds()); 35 } 36 37 TEST(TrackedTimeTest, TrackedTimerDuration) { 38 int kFirstMilliseconds = 793; 39 int kSecondMilliseconds = 14889; 40 41 Duration first = Duration::FromMilliseconds(kFirstMilliseconds); 42 Duration second = Duration::FromMilliseconds(kSecondMilliseconds); 43 44 EXPECT_EQ(kFirstMilliseconds, first.InMilliseconds()); 45 EXPECT_EQ(kSecondMilliseconds, second.InMilliseconds()); 46 47 Duration sum = first + second; 48 EXPECT_EQ(kFirstMilliseconds + kSecondMilliseconds, sum.InMilliseconds()); 49 } 50 51 TEST(TrackedTimeTest, TrackedTimerVsTimeTicks) { 52 // Make sure that our 32 bit timer is aligned with the TimeTicks() timer. 53 54 // First get a 64 bit timer (which should not be null). 55 base::TimeTicks ticks_before = base::TimeTicks::Now(); 56 EXPECT_FALSE(ticks_before.is_null()); 57 58 // Then get a 32 bit timer that can be be null when it wraps. 59 TrackedTime now = TrackedTime::Now(); 60 61 // Then get a bracketing time. 62 base::TimeTicks ticks_after = base::TimeTicks::Now(); 63 EXPECT_FALSE(ticks_after.is_null()); 64 65 // Now make sure that we bracketed our tracked time nicely. 66 Duration before = now - TrackedTime(ticks_before); 67 EXPECT_LE(0, before.InMilliseconds()); 68 Duration after = now - TrackedTime(ticks_after); 69 EXPECT_GE(0, after.InMilliseconds()); 70 } 71 72 TEST(TrackedTimeTest, TrackedTimerDisabled) { 73 // Check to be sure disabling the collection of data induces a null time 74 // (which we know will return much faster). 75 ThreadData::InitializeAndSetTrackingStatus(ThreadData::DEACTIVATED); 76 // Since we disabled tracking, we should get a null response. 77 TrackedTime track_now = ThreadData::Now(); 78 EXPECT_TRUE(track_now.is_null()); 79 } 80 81 TEST(TrackedTimeTest, TrackedTimerEnabled) { 82 ThreadData::InitializeAndSetTrackingStatus(ThreadData::PROFILING_ACTIVE); 83 // Make sure that when we enable tracking, we get a real timer result. 84 85 // First get a 64 bit timer (which should not be null). 86 base::TimeTicks ticks_before = base::TimeTicks::Now(); 87 EXPECT_FALSE(ticks_before.is_null()); 88 89 // Then get a 32 bit timer that can be null when it wraps. 90 // Crtical difference from the TrackedTimerVsTimeTicks test, is that we use 91 // ThreadData::Now(). It can sometimes return the null time. 92 TrackedTime now = ThreadData::Now(); 93 94 // Then get a bracketing time. 95 base::TimeTicks ticks_after = base::TimeTicks::Now(); 96 EXPECT_FALSE(ticks_after.is_null()); 97 98 // Now make sure that we bracketed our tracked time nicely. 99 Duration before = now - TrackedTime(ticks_before); 100 EXPECT_LE(0, before.InMilliseconds()); 101 Duration after = now - TrackedTime(ticks_after); 102 EXPECT_GE(0, after.InMilliseconds()); 103 } 104 105 } // namespace tracked_objects 106
