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Unified Diff: test/base-unittests/platform/time-unittest.cc

Issue 448603002: Refactor unit tests for the base library to use GTest. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Reduce LoopIncrement test time. Created 6 years, 4 months ago
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Index: test/base-unittests/platform/time-unittest.cc
diff --git a/test/base-unittests/platform/time-unittest.cc b/test/base-unittests/platform/time-unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..cd718e2aa2ed412ee6075d76ecb7a6a9b3e5bd63
--- /dev/null
+++ b/test/base-unittests/platform/time-unittest.cc
@@ -0,0 +1,183 @@
+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/base/platform/time.h"
+
+#if V8_OS_POSIX
+#include <sys/time.h>
+#endif
+
+#if V8_OS_WIN
+#include "src/base/win32-headers.h"
+#endif
+
+#include "src/base/platform/elapsed-timer.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace v8 {
+namespace base {
+
+TEST(TimeDelta, FromAndIn) {
+ EXPECT_EQ(TimeDelta::FromDays(2), TimeDelta::FromHours(48));
+ EXPECT_EQ(TimeDelta::FromHours(3), TimeDelta::FromMinutes(180));
+ EXPECT_EQ(TimeDelta::FromMinutes(2), TimeDelta::FromSeconds(120));
+ EXPECT_EQ(TimeDelta::FromSeconds(2), TimeDelta::FromMilliseconds(2000));
+ EXPECT_EQ(TimeDelta::FromMilliseconds(2), TimeDelta::FromMicroseconds(2000));
+ EXPECT_EQ(static_cast<int>(13), TimeDelta::FromDays(13).InDays());
+ EXPECT_EQ(static_cast<int>(13), TimeDelta::FromHours(13).InHours());
+ EXPECT_EQ(static_cast<int>(13), TimeDelta::FromMinutes(13).InMinutes());
+ EXPECT_EQ(static_cast<int64_t>(13), TimeDelta::FromSeconds(13).InSeconds());
+ EXPECT_EQ(13.0, TimeDelta::FromSeconds(13).InSecondsF());
+ EXPECT_EQ(static_cast<int64_t>(13),
+ TimeDelta::FromMilliseconds(13).InMilliseconds());
+ EXPECT_EQ(13.0, TimeDelta::FromMilliseconds(13).InMillisecondsF());
+ EXPECT_EQ(static_cast<int64_t>(13),
+ TimeDelta::FromMicroseconds(13).InMicroseconds());
+}
+
+
+#if V8_OS_MACOSX
+TEST(TimeDelta, MachTimespec) {
+ TimeDelta null = TimeDelta();
+ EXPECT_EQ(null, TimeDelta::FromMachTimespec(null.ToMachTimespec()));
+ TimeDelta delta1 = TimeDelta::FromMilliseconds(42);
+ EXPECT_EQ(delta1, TimeDelta::FromMachTimespec(delta1.ToMachTimespec()));
+ TimeDelta delta2 = TimeDelta::FromDays(42);
+ EXPECT_EQ(delta2, TimeDelta::FromMachTimespec(delta2.ToMachTimespec()));
+}
+#endif
+
+
+TEST(Time, JsTime) {
+ Time t = Time::FromJsTime(700000.3);
+ EXPECT_EQ(700000.3, t.ToJsTime());
+}
+
+
+#if V8_OS_POSIX
+TEST(Time, Timespec) {
+ Time null;
+ EXPECT_TRUE(null.IsNull());
+ EXPECT_EQ(null, Time::FromTimespec(null.ToTimespec()));
+ Time now = Time::Now();
+ EXPECT_EQ(now, Time::FromTimespec(now.ToTimespec()));
+ Time now_sys = Time::NowFromSystemTime();
+ EXPECT_EQ(now_sys, Time::FromTimespec(now_sys.ToTimespec()));
+ Time unix_epoch = Time::UnixEpoch();
+ EXPECT_EQ(unix_epoch, Time::FromTimespec(unix_epoch.ToTimespec()));
+ Time max = Time::Max();
+ EXPECT_TRUE(max.IsMax());
+ EXPECT_EQ(max, Time::FromTimespec(max.ToTimespec()));
+}
+
+
+TEST(Time, Timeval) {
+ Time null;
+ EXPECT_TRUE(null.IsNull());
+ EXPECT_EQ(null, Time::FromTimeval(null.ToTimeval()));
+ Time now = Time::Now();
+ EXPECT_EQ(now, Time::FromTimeval(now.ToTimeval()));
+ Time now_sys = Time::NowFromSystemTime();
+ EXPECT_EQ(now_sys, Time::FromTimeval(now_sys.ToTimeval()));
+ Time unix_epoch = Time::UnixEpoch();
+ EXPECT_EQ(unix_epoch, Time::FromTimeval(unix_epoch.ToTimeval()));
+ Time max = Time::Max();
+ EXPECT_TRUE(max.IsMax());
+ EXPECT_EQ(max, Time::FromTimeval(max.ToTimeval()));
+}
+#endif
+
+
+#if V8_OS_WIN
+TEST(Time, Filetime) {
+ Time null;
+ EXPECT_TRUE(null.IsNull());
+ EXPECT_EQ(null, Time::FromFiletime(null.ToFiletime()));
+ Time now = Time::Now();
+ EXPECT_EQ(now, Time::FromFiletime(now.ToFiletime()));
+ Time now_sys = Time::NowFromSystemTime();
+ EXPECT_EQ(now_sys, Time::FromFiletime(now_sys.ToFiletime()));
+ Time unix_epoch = Time::UnixEpoch();
+ EXPECT_EQ(unix_epoch, Time::FromFiletime(unix_epoch.ToFiletime()));
+ Time max = Time::Max();
+ EXPECT_TRUE(max.IsMax());
+ EXPECT_EQ(max, Time::FromFiletime(max.ToFiletime()));
+}
+#endif
+
+
+namespace {
+
+template <typename T>
+static void ResolutionTest(T (*Now)(), TimeDelta target_granularity) {
+ // We're trying to measure that intervals increment in a VERY small amount
+ // of time -- according to the specified target granularity. Unfortunately,
+ // if we happen to have a context switch in the middle of our test, the
+ // context switch could easily exceed our limit. So, we iterate on this
+ // several times. As long as we're able to detect the fine-granularity
+ // timers at least once, then the test has succeeded.
+ static const TimeDelta kExpirationTimeout = TimeDelta::FromSeconds(1);
+ ElapsedTimer timer;
+ timer.Start();
+ TimeDelta delta;
+ do {
+ T start = Now();
+ T now = start;
+ // Loop until we can detect that the clock has changed. Non-HighRes timers
+ // will increment in chunks, i.e. 15ms. By spinning until we see a clock
+ // change, we detect the minimum time between measurements.
+ do {
+ now = Now();
+ delta = now - start;
+ } while (now <= start);
+ EXPECT_NE(static_cast<int64_t>(0), delta.InMicroseconds());
+ } while (delta > target_granularity && !timer.HasExpired(kExpirationTimeout));
+ EXPECT_LE(delta, target_granularity);
+}
+
+}
+
+
+TEST(Time, NowResolution) {
+ // We assume that Time::Now() has at least 16ms resolution.
+ static const TimeDelta kTargetGranularity = TimeDelta::FromMilliseconds(16);
+ ResolutionTest<Time>(&Time::Now, kTargetGranularity);
+}
+
+
+TEST(TimeTicks, NowResolution) {
+ // We assume that TimeTicks::Now() has at least 16ms resolution.
+ static const TimeDelta kTargetGranularity = TimeDelta::FromMilliseconds(16);
+ ResolutionTest<TimeTicks>(&TimeTicks::Now, kTargetGranularity);
+}
+
+
+TEST(TimeTicks, HighResolutionNowResolution) {
+ if (!TimeTicks::IsHighResolutionClockWorking()) return;
+
+ // We assume that TimeTicks::HighResolutionNow() has sub-ms resolution.
+ static const TimeDelta kTargetGranularity = TimeDelta::FromMilliseconds(1);
+ ResolutionTest<TimeTicks>(&TimeTicks::HighResolutionNow, kTargetGranularity);
+}
+
+
+TEST(TimeTicks, IsMonotonic) {
+ TimeTicks previous_normal_ticks;
+ TimeTicks previous_highres_ticks;
+ ElapsedTimer timer;
+ timer.Start();
+ while (!timer.HasExpired(TimeDelta::FromMilliseconds(100))) {
+ TimeTicks normal_ticks = TimeTicks::Now();
+ TimeTicks highres_ticks = TimeTicks::HighResolutionNow();
+ EXPECT_GE(normal_ticks, previous_normal_ticks);
+ EXPECT_GE((normal_ticks - previous_normal_ticks).InMicroseconds(), 0);
+ EXPECT_GE(highres_ticks, previous_highres_ticks);
+ EXPECT_GE((highres_ticks - previous_highres_ticks).InMicroseconds(), 0);
+ previous_normal_ticks = normal_ticks;
+ previous_highres_ticks = highres_ticks;
+ }
+}
+
+} // namespace base
+} // namespace v8

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