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// Copyright (c) 2012 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.
#include <math.h>
#include <stdlib.h>
#include "ppapi/shared_impl/time_conversion.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace ppapi {
// Slop we'll allow in two Time "internal values" to consider them equal.
// Double conversion can introduce rounding errors. The internal values are in
// microseconds, so an error here is very small.
static const int kTimeInternalValueSlop = 2;
// Same as above in double-precision seconds units.
static const double kTimeSecondsSlop =
static_cast<double>(kTimeInternalValueSlop) /
base::Time::kMicrosecondsPerSecond;
TEST(TimeConversion, Time) {
// Should be able to round-trip.
base::Time now = base::Time::Now();
base::Time converted = ppapi::PPTimeToTime(TimeToPPTime(now));
EXPECT_GE(kTimeInternalValueSlop,
abs(static_cast<int>((converted - now).ToInternalValue())));
// Units should be in seconds.
base::Time one_second_from_now = now + base::TimeDelta::FromSeconds(1);
double converted_one_second_from_now =
ppapi::TimeToPPTime(one_second_from_now) - ppapi::TimeToPPTime(now);
EXPECT_GE(kTimeSecondsSlop, fabs(converted_one_second_from_now - 1));
}
TEST(TimeConversion, EventTime) {
// Should be able to round-trip.
base::Time now = base::Time::Now();
double event_now = now.ToDoubleT();
double converted =
ppapi::EventTimeToPPTimeTicks(ppapi::PPTimeTicksToEventTime(event_now));
EXPECT_GE(kTimeSecondsSlop, fabs(converted - event_now));
// Units should be in seconds.
base::Time one_second_from_now = now + base::TimeDelta::FromSeconds(1);
double event_one_second_from_now = one_second_from_now.ToDoubleT();
EXPECT_GE(kTimeSecondsSlop,
1.0 - ppapi::EventTimeToPPTimeTicks(event_one_second_from_now) -
ppapi::EventTimeToPPTimeTicks(event_now));
}
TEST(TimeConversion, EpochTime) {
// Should be able to round-trip from epoch time.
base::Time epoch = base::Time::UnixEpoch();
base::Time converted = ppapi::PPTimeToTime(TimeToPPTime(epoch));
EXPECT_GE(kTimeInternalValueSlop,
abs(static_cast<int>((converted - epoch).ToInternalValue())));
// Units should be in seconds.
base::Time one_second_from_epoch = epoch + base::TimeDelta::FromSeconds(1);
double converted_one_second_from_epoch =
ppapi::TimeToPPTime(one_second_from_epoch) - ppapi::TimeToPPTime(epoch);
EXPECT_GE(kTimeSecondsSlop, fabs(converted_one_second_from_epoch - 1));
// Epoch time should be equal to a PP_Time of 0.0.
EXPECT_GE(kTimeSecondsSlop, fabs(ppapi::TimeToPPTime(epoch) - 0.0));
EXPECT_GE(kTimeInternalValueSlop,
abs(static_cast<int>(
(ppapi::PPTimeToTime(0.0) - epoch).ToInternalValue())));
}
} // namespace ppapi
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