Index: base/profiler/tracked_time_unittest.cc |
=================================================================== |
--- base/profiler/tracked_time_unittest.cc (revision 0) |
+++ base/profiler/tracked_time_unittest.cc (revision 0) |
@@ -0,0 +1,111 @@ |
+// 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()); |
+} |
+ |
+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 |