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#region Copyright notice and license
// Copyright 2015 gRPC authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#endregion
using System;
using System.Runtime.InteropServices;
using Grpc.Core.Internal;
using Grpc.Core.Utils;
using NUnit.Framework;
namespace Grpc.Core.Internal.Tests
{
public class TimespecTest
{
[Test]
public void Now_IsInUtc()
{
Assert.AreEqual(DateTimeKind.Utc, Timespec.Now.ToDateTime().Kind);
}
[Test]
public void Now_AgreesWithUtcNow()
{
var timespec = Timespec.Now;
var utcNow = DateTime.UtcNow;
TimeSpan difference = utcNow - timespec.ToDateTime();
// This test is inherently a race - but the two timestamps
// should really be way less that a minute apart.
Assert.IsTrue(difference.TotalSeconds < 60);
}
[Test]
public void InfFutureMatchesNativeValue()
{
Assert.AreEqual(Timespec.NativeInfFuture, Timespec.InfFuture);
}
[Test]
public void InfPastMatchesNativeValue()
{
Assert.AreEqual(Timespec.NativeInfPast, Timespec.InfPast);
}
[Test]
public void TimespecSizeIsNativeSize()
{
Assert.AreEqual(Timespec.NativeSize, Marshal.SizeOf(typeof(Timespec)));
}
[Test]
public void ToDateTime()
{
Assert.AreEqual(new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc),
new Timespec(0, 0).ToDateTime());
Assert.AreEqual(new DateTime(1970, 1, 1, 0, 0, 10, DateTimeKind.Utc).AddTicks(50),
new Timespec(10, 5000).ToDateTime());
Assert.AreEqual(new DateTime(2015, 7, 21, 4, 21, 48, DateTimeKind.Utc),
new Timespec(1437452508, 0).ToDateTime());
// before epoch
Assert.AreEqual(new DateTime(1969, 12, 31, 23, 59, 55, DateTimeKind.Utc).AddTicks(10),
new Timespec(-5, 1000).ToDateTime());
// infinity
Assert.AreEqual(DateTime.MaxValue, Timespec.InfFuture.ToDateTime());
Assert.AreEqual(DateTime.MinValue, Timespec.InfPast.ToDateTime());
// nanos are rounded to ticks are rounded up
Assert.AreEqual(new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc).AddTicks(1),
new Timespec(0, 99).ToDateTime());
// Illegal inputs
Assert.Throws(typeof(InvalidOperationException),
() => new Timespec(0, -2).ToDateTime());
Assert.Throws(typeof(InvalidOperationException),
() => new Timespec(0, 1000 * 1000 * 1000).ToDateTime());
Assert.Throws(typeof(InvalidOperationException),
() => new Timespec(0, 0, ClockType.Monotonic).ToDateTime());
}
[Test]
public void ToDateTime_ReturnsUtc()
{
Assert.AreEqual(DateTimeKind.Utc, new Timespec(1437452508, 0).ToDateTime().Kind);
Assert.AreNotEqual(DateTimeKind.Unspecified, new Timespec(1437452508, 0).ToDateTime().Kind);
}
[Test]
public void ToDateTime_Overflow()
{
var timespec = new Timespec(long.MaxValue - 100, 0);
Assert.AreNotEqual(Timespec.InfFuture, timespec);
Assert.AreEqual(DateTime.MaxValue, timespec.ToDateTime());
Assert.AreEqual(DateTime.MinValue, new Timespec(long.MinValue + 100, 0).ToDateTime());
}
[Test]
public void ToDateTime_OutOfDateTimeRange()
{
// DateTime range goes up to year 9999, 20000 years from now should
// be out of range.
long seconds = 20000L * 365L * 24L * 3600L;
var timespec = new Timespec(seconds, 0);
Assert.AreNotEqual(Timespec.InfFuture, timespec);
Assert.AreEqual(DateTime.MaxValue, timespec.ToDateTime());
Assert.AreEqual(DateTime.MinValue, new Timespec(-seconds, 0).ToDateTime());
}
[Test]
public void FromDateTime()
{
Assert.AreEqual(new Timespec(0, 0),
Timespec.FromDateTime(new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc)));
Assert.AreEqual(new Timespec(10, 5000),
Timespec.FromDateTime(new DateTime(1970, 1, 1, 0, 0, 10, DateTimeKind.Utc).AddTicks(50)));
Assert.AreEqual(new Timespec(1437452508, 0),
Timespec.FromDateTime(new DateTime(2015, 7, 21, 4, 21, 48, DateTimeKind.Utc)));
// before epoch
Assert.AreEqual(new Timespec(-5, 1000),
Timespec.FromDateTime(new DateTime(1969, 12, 31, 23, 59, 55, DateTimeKind.Utc).AddTicks(10)));
// infinity
Assert.AreEqual(Timespec.InfFuture, Timespec.FromDateTime(DateTime.MaxValue));
Assert.AreEqual(Timespec.InfPast, Timespec.FromDateTime(DateTime.MinValue));
// illegal inputs
Assert.Throws(typeof(ArgumentException),
() => Timespec.FromDateTime(new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Unspecified)));
}
[Test]
[Category("Performance")]
[Ignore("Prevent running on Jenkins")]
public void NowBenchmark()
{
// approx Timespec.Now latency <33ns
BenchmarkUtil.RunBenchmark(10000000, 1000000000, () => { var now = Timespec.Now; });
}
[Test]
[Category("Performance")]
[Ignore("Prevent running on Jenkins")]
public void PreciseNowBenchmark()
{
// approx Timespec.PreciseNow latency <18ns (when compiled with GRPC_TIMERS_RDTSC)
BenchmarkUtil.RunBenchmark(10000000, 1000000000, () => { var now = Timespec.PreciseNow; });
}
}
}
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