diff --git a/EonaCat.DeterministicTime.AspNetCore/EonaCat.DeterministicTime.AspNetCore/EonaCat.DeterministicTime.AspNetCore.csproj b/EonaCat.DeterministicTime.AspNetCore/EonaCat.DeterministicTime.AspNetCore/EonaCat.DeterministicTime.AspNetCore.csproj new file mode 100644 index 0000000..421f9c2 --- /dev/null +++ b/EonaCat.DeterministicTime.AspNetCore/EonaCat.DeterministicTime.AspNetCore/EonaCat.DeterministicTime.AspNetCore.csproj @@ -0,0 +1,49 @@ + + + + net6.0 + enable + enable + latest + + EonaCat.DeterministicTime.AspNetCore + 1.0.0 + EonaCat (Jeroen Saey) + + ASP.NET Core integration for DeterministicTime. + + aspnet;core;middleware;time;deterministic; + True + EonaCat.DeterministicTime.AspNetCore + EonaCat (Jeroen Saey) + EonaCat.DeterministicTime.AspNetCore + EonaCat (Jeroen Saey) + https://git.saey.me/EonaCat/EonaCat.DeterministicTime + icon.png + Readme.md + https://git.saey.me/EonaCat/EonaCat.DeterministicTime + git + LICENSE + + + + + True + \ + + + True + \ + + + True + \ + + + + + + + + + diff --git a/EonaCat.DeterministicTime.AspNetCore/EonaCat.DeterministicTime.AspNetCore/Middleware/DeterministicTimeMiddleware.cs b/EonaCat.DeterministicTime.AspNetCore/EonaCat.DeterministicTime.AspNetCore/Middleware/DeterministicTimeMiddleware.cs new file mode 100644 index 0000000..b2e7e58 --- /dev/null +++ b/EonaCat.DeterministicTime.AspNetCore/EonaCat.DeterministicTime.AspNetCore/Middleware/DeterministicTimeMiddleware.cs @@ -0,0 +1,35 @@ +using Microsoft.AspNetCore.Builder; +using Microsoft.AspNetCore.Http; +using System.Net.Http; + +namespace EonaCat.DeterministicTime.AspNetCore; + +// This file is part of the EonaCat project(s) which is released under the Apache License. +// See the LICENSE file or go to https://EonaCat.com/License for full license details. + +public sealed class DeterministicTimeMiddleware +{ + private readonly RequestDelegate _next; + + public DeterministicTimeMiddleware(RequestDelegate next) + { + _next = next; + } + + public async Task InvokeAsync(HttpContext context) + { + using (TimeScope.Scaled(1.0)) + { + await _next(context); + } + } +} + +public static class DeterministicTimeMiddlewareExtensions +{ + public static IApplicationBuilder UseDeterministicTime( + this IApplicationBuilder app) + { + return app.UseMiddleware(); + } +} diff --git a/EonaCat.DeterministicTime.AspNetCore/EonaCat.DeterministicTime.AspNetCore/Properties/launchSettings.json b/EonaCat.DeterministicTime.AspNetCore/EonaCat.DeterministicTime.AspNetCore/Properties/launchSettings.json new file mode 100644 index 0000000..753c7a6 --- /dev/null +++ b/EonaCat.DeterministicTime.AspNetCore/EonaCat.DeterministicTime.AspNetCore/Properties/launchSettings.json @@ -0,0 +1,12 @@ +{ + "profiles": { + "EonaCat.DeterministicTime.AspNet": { + "commandName": "Project", + "launchBrowser": true, + "environmentVariables": { + "ASPNETCORE_ENVIRONMENT": "Development" + }, + "applicationUrl": "https://localhost:56865;http://localhost:56866" + } + } +} \ No newline at end of file diff --git a/EonaCat.DeterministicTime.AspNetFramework/EonaCat.DeterministicTime.AspNetFramework/EonaCat.DeterministicTime.AspNetFramework.csproj b/EonaCat.DeterministicTime.AspNetFramework/EonaCat.DeterministicTime.AspNetFramework/EonaCat.DeterministicTime.AspNetFramework.csproj new file mode 100644 index 0000000..9644eb1 --- /dev/null +++ b/EonaCat.DeterministicTime.AspNetFramework/EonaCat.DeterministicTime.AspNetFramework/EonaCat.DeterministicTime.AspNetFramework.csproj @@ -0,0 +1,51 @@ + + + +net48 + enable + latest + + EonaCat.DeterministicTime.AspNetFramework + 1.0.0 + EonaCat (Jeroen Saey) + + ASP.NET 4.8 integration for DeterministicTime. + + aspnet;httpmodule;time;deterministic + latest + True + EonaCat.DeterministicTime.AspNetFramework + EonaCat (Jeroen Saey) + EonaCat (Jeroen Saey) + https://git.saey.me/EonaCat/EonaCat.DeterministicTime + icon.png + Readme.md + https://git.saey.me/EonaCat/EonaCat.DeterministicTime + git + LICENSE + + + + + True + \ + + + True + \ + + + True + \ + + + + + + + + + + + + diff --git a/EonaCat.DeterministicTime.AspNetFramework/EonaCat.DeterministicTime.AspNetFramework/Modules/DeterministicTimeMiddleware.cs b/EonaCat.DeterministicTime.AspNetFramework/EonaCat.DeterministicTime.AspNetFramework/Modules/DeterministicTimeMiddleware.cs new file mode 100644 index 0000000..af80c52 --- /dev/null +++ b/EonaCat.DeterministicTime.AspNetFramework/EonaCat.DeterministicTime.AspNetFramework/Modules/DeterministicTimeMiddleware.cs @@ -0,0 +1,19 @@ +using System.Web; + +namespace EonaCat.DeterministicTime.AspNetFramework; + +// This file is part of the EonaCat project(s) which is released under the Apache License. +// See the LICENSE file or go to https://EonaCat.com/License for full license details. + +public class DeterministicTimeHttpModule : IHttpModule +{ + public void Init(HttpApplication context) + { + context.BeginRequest += (sender, e) => + { + TimeScope.Scaled(1.0); // per-request deterministic scope + }; + } + + public void Dispose() { } +} \ No newline at end of file diff --git a/EonaCat.DeterministicTime.AspNetFramework/EonaCat.DeterministicTime.AspNetFramework/Properties/launchSettings.json b/EonaCat.DeterministicTime.AspNetFramework/EonaCat.DeterministicTime.AspNetFramework/Properties/launchSettings.json new file mode 100644 index 0000000..753c7a6 --- /dev/null +++ b/EonaCat.DeterministicTime.AspNetFramework/EonaCat.DeterministicTime.AspNetFramework/Properties/launchSettings.json @@ -0,0 +1,12 @@ +{ + "profiles": { + "EonaCat.DeterministicTime.AspNet": { + "commandName": "Project", + "launchBrowser": true, + "environmentVariables": { + "ASPNETCORE_ENVIRONMENT": "Development" + }, + "applicationUrl": "https://localhost:56865;http://localhost:56866" + } + } +} \ No newline at end of file diff --git a/EonaCat.DeterministicTime/EonaCat.DeterministicTime.slnx b/EonaCat.DeterministicTime/EonaCat.DeterministicTime.slnx new file mode 100644 index 0000000..9494d33 --- /dev/null +++ b/EonaCat.DeterministicTime/EonaCat.DeterministicTime.slnx @@ -0,0 +1,5 @@ + + + + + diff --git a/EonaCat.DeterministicTime/EonaCat.DeterministicTime/DeterministicDelay.cs b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/DeterministicDelay.cs new file mode 100644 index 0000000..89a30d3 --- /dev/null +++ b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/DeterministicDelay.cs @@ -0,0 +1,33 @@ +using System; +using System.Threading.Tasks; + +namespace EonaCat.DeterministicTime; + +// This file is part of the EonaCat project(s) which is released under the Apache License. +// See the LICENSE file or go to https://EonaCat.com/License for full license details. + +/// +/// Deterministic replacement for Task.Delay. +/// Completes when deterministic time advances past the delay. +/// +public static class DeterministicDelay +{ + public static Task For(TimeSpan delay) + { + if (delay < TimeSpan.Zero) + { + throw new ArgumentOutOfRangeException(nameof(delay)); + } + + var tcs = new TaskCompletionSource( + TaskCreationOptions.RunContinuationsAsynchronously); + + DeterministicTimer.Start(delay, () => + { + tcs.TrySetResult(true); + }); + + return tcs.Task; + } +} + diff --git a/EonaCat.DeterministicTime/EonaCat.DeterministicTime/DeterministicScheduler.cs b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/DeterministicScheduler.cs new file mode 100644 index 0000000..84cbec7 --- /dev/null +++ b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/DeterministicScheduler.cs @@ -0,0 +1,68 @@ +using System; +using System.Collections.Generic; + +namespace EonaCat.DeterministicTime; + +// This file is part of the EonaCat project(s) which is released under the Apache License. +// See the LICENSE file or go to https://EonaCat.com/License for full license details. + +public sealed class DeterministicScheduler +{ + private readonly object _lock = new(); + private readonly List _jobs = new(); + + public static DeterministicScheduler Global { get; } = new(); + + public void Tick() + { + var now = DeterministicTime.UtcNow; + lock (_lock) + { + foreach (var job in _jobs) + { + job.TryRun(now); + } + } + } + + public IDisposable Every(TimeSpan interval, Action action) + { + var job = new ScheduledJob(interval, action); + lock (_lock) + { + _jobs.Add(job); + } + + return new Handle(() => _jobs.Remove(job)); + } + + private sealed class Handle : IDisposable + { + private readonly Action _dispose; + public Handle(Action dispose) => _dispose = dispose; + public void Dispose() => _dispose(); + } + + private sealed class ScheduledJob + { + private readonly TimeSpan _interval; + private readonly Action _action; + private DateTime _next; + + public ScheduledJob(TimeSpan interval, Action action) + { + _interval = interval; + _action = action; + _next = DeterministicTime.UtcNow + interval; + } + + public void TryRun(DateTime now) + { + while (now >= _next) + { + _action(); + _next += _interval; + } + } + } +} diff --git a/EonaCat.DeterministicTime/EonaCat.DeterministicTime/DeterministicStopwatch.cs b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/DeterministicStopwatch.cs new file mode 100644 index 0000000..e9274d5 --- /dev/null +++ b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/DeterministicStopwatch.cs @@ -0,0 +1,66 @@ +using System; +using System.Diagnostics; + +namespace EonaCat.DeterministicTime; + +// This file is part of the EonaCat project(s) which is released under the Apache License. +// See the LICENSE file or go to https://EonaCat.com/License for full license details. + +public sealed class DeterministicStopwatch +{ + private long _start; + private long _elapsed; + private bool _running; + + public static DeterministicStopwatch StartNew() + { + var sw = new DeterministicStopwatch(); + sw.Start(); + return sw; + } + + public void Start() + { + if (_running) + { + return; + } + + _start = DeterministicTime.GetTimestamp(); + _running = true; + } + + public void Stop() + { + if (!_running) + { + return; + } + + _elapsed += DeterministicTime.GetTimestamp() - _start; + _running = false; + } + + public void Reset() + { + _elapsed = 0; + _running = false; + } + + public TimeSpan Elapsed + { + get + { + long ticks = _elapsed; + if (_running) + { + ticks += DeterministicTime.GetTimestamp() - _start; + } + + // Convert Stopwatch ticks to TimeSpan + double seconds = (double)ticks / Stopwatch.Frequency; + return TimeSpan.FromSeconds(seconds); + } + } + +} diff --git a/EonaCat.DeterministicTime/EonaCat.DeterministicTime/DeterministicTime.cs b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/DeterministicTime.cs new file mode 100644 index 0000000..52cbff4 --- /dev/null +++ b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/DeterministicTime.cs @@ -0,0 +1,50 @@ +using System; +using System.Threading; + +namespace EonaCat.DeterministicTime; + +// This file is part of the EonaCat project(s) which is released under the Apache License. +// See the LICENSE file or go to https://EonaCat.com/License for full license details. + +public static class DeterministicTime +{ + private static readonly AsyncLocal _current = new(); + private static readonly ITimeSource _system = new SystemTimeSource(); + + private static ITimeSource Source => _current.Value ?? _system; + + public static DateTime UtcNow => Source.UtcNow; + public static DateTime Now => Source.UtcNow.ToLocalTime(); + public static long GetTimestamp() => Source.Timestamp; + + internal static IDisposable Push(ITimeSource source) + { + var previous = _current.Value; + _current.Value = source; + return new Scope(() => _current.Value = previous); + } + + public static void Advance(TimeSpan delta) + { + if (Source is not IAdjustableTimeSource adjustable) + { + throw new InvalidOperationException("Time source is not adjustable"); + } + + adjustable.Advance(delta); + + DeterministicScheduler.Global.Tick(); + } + + public static IDisposable WithOffset(TimeSpan offset) + { + return Push(new OffsetTimeSource(Source, offset)); + } + + private sealed class Scope : IDisposable + { + private readonly Action _restore; + public Scope(Action restore) => _restore = restore; + public void Dispose() => _restore(); + } +} diff --git a/EonaCat.DeterministicTime/EonaCat.DeterministicTime/DeterministicTimer.cs b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/DeterministicTimer.cs new file mode 100644 index 0000000..3d09d87 --- /dev/null +++ b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/DeterministicTimer.cs @@ -0,0 +1,59 @@ +using System; + +namespace EonaCat.DeterministicTime; + +// This file is part of the EonaCat project(s) which is released under the Apache License. +// See the LICENSE file or go to https://EonaCat.com/License for full license details. + +/// +/// A deterministic, virtual-time-aware timer. +/// Fires immediately when deterministic time passes its due time. +/// +public sealed class DeterministicTimer : IDisposable +{ + private readonly Action _callback; + private readonly IDisposable _handle; + private bool _fired; + + private DeterministicTimer(TimeSpan delay, Action callback) + { + _callback = callback; + + _handle = DeterministicScheduler.Global.Every( + delay, + TryFire + ); + } + + private void TryFire() + { + if (_fired) + { + return; + } + + _fired = true; + _callback(); + Dispose(); + } + + /// + /// Starts a one-shot deterministic timer. + /// + public static DeterministicTimer Start( + TimeSpan delay, + Action callback) + { + if (delay < TimeSpan.Zero) + { + throw new ArgumentOutOfRangeException(nameof(delay)); + } + + return new DeterministicTimer(delay, callback); + } + + public void Dispose() + { + _handle.Dispose(); + } +} diff --git a/EonaCat.DeterministicTime/EonaCat.DeterministicTime/DistributedTimeSource.cs b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/DistributedTimeSource.cs new file mode 100644 index 0000000..72d0a5e --- /dev/null +++ b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/DistributedTimeSource.cs @@ -0,0 +1,25 @@ +using System; +using System.Diagnostics; + +namespace EonaCat.DeterministicTime; + +// This file is part of the EonaCat project(s) which is released under the Apache License. +// See the LICENSE file or go to https://EonaCat.com/License for full license details. + +public interface IDistributedTimeCoordinator +{ + DateTime GetClusterUtc(); +} + +public sealed class DistributedTimeSource : ITimeSource +{ + private readonly IDistributedTimeCoordinator _coordinator; + + public DistributedTimeSource(IDistributedTimeCoordinator coordinator) + { + _coordinator = coordinator; + } + + public DateTime UtcNow => _coordinator.GetClusterUtc(); + public long Timestamp => Stopwatch.GetTimestamp(); +} diff --git a/EonaCat.DeterministicTime/EonaCat.DeterministicTime/EonaCat.DeterministicTime.csproj b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/EonaCat.DeterministicTime.csproj new file mode 100644 index 0000000..aed2e2c --- /dev/null +++ b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/EonaCat.DeterministicTime.csproj @@ -0,0 +1,40 @@ + + + netstandard2.1; net48 + EonaCat.DeterministicTime + 1.0.0 + EonaCat (Jeroen Saey) + Deterministic, testable, and replayable time for .NET + https://git.saey.me/EonaCat/EonaCat.DeterministicTime + time;testing;ntp;deterministic;clock;EonaCat;Jeroen;Saey + true + latest + True + EonaCat.DeterministicTime + EonaCat (Jeroen Saey) + EonaCat.DeterministicTime + EonaCat (Jeroen Saey) + https://git.saey.me/EonaCat/EonaCat.DeterministicTime + icon.png + Readme.md + git + LICENSE + + + + True + \ + + + True + \ + + + True + \ + + + + + + \ No newline at end of file diff --git a/EonaCat.DeterministicTime/EonaCat.DeterministicTime/IAdjustableTimeSource.cs b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/IAdjustableTimeSource.cs new file mode 100644 index 0000000..559b40e --- /dev/null +++ b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/IAdjustableTimeSource.cs @@ -0,0 +1,11 @@ +using System; + +namespace EonaCat.DeterministicTime; + +// This file is part of the EonaCat project(s) which is released under the Apache License. +// See the LICENSE file or go to https://EonaCat.com/License for full license details. + +public interface IAdjustableTimeSource : ITimeSource +{ + void Advance(TimeSpan delta); +} diff --git a/EonaCat.DeterministicTime/EonaCat.DeterministicTime/ITimeSoure.cs b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/ITimeSoure.cs new file mode 100644 index 0000000..da8cff4 --- /dev/null +++ b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/ITimeSoure.cs @@ -0,0 +1,12 @@ +using System; + +namespace EonaCat.DeterministicTime; + +// This file is part of the EonaCat project(s) which is released under the Apache License. +// See the LICENSE file or go to https://EonaCat.com/License for full license details. + +public interface ITimeSource +{ + DateTime UtcNow { get; } + long Timestamp { get; } +} diff --git a/EonaCat.DeterministicTime/EonaCat.DeterministicTime/NtpSynchronization.cs b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/NtpSynchronization.cs new file mode 100644 index 0000000..38874cd --- /dev/null +++ b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/NtpSynchronization.cs @@ -0,0 +1,20 @@ +using System; + +namespace EonaCat.DeterministicTime; + +// This file is part of the EonaCat project(s) which is released under the Apache License. +// See the LICENSE file or go to https://EonaCat.com/License for full license details. + +public interface INtpTimeProvider +{ + DateTime GetNetworkUtc(); +} + +public static class NtpSynchronization +{ + public static IDisposable Sync(INtpTimeProvider provider) + { + var offset = provider.GetNetworkUtc() - DateTime.UtcNow; + return DeterministicTime.WithOffset(offset); + } +} diff --git a/EonaCat.DeterministicTime/EonaCat.DeterministicTime/OffsetTimeSource.cs b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/OffsetTimeSource.cs new file mode 100644 index 0000000..5361c4d --- /dev/null +++ b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/OffsetTimeSource.cs @@ -0,0 +1,21 @@ +using System; + +namespace EonaCat.DeterministicTime; + +// This file is part of the EonaCat project(s) which is released under the Apache License. +// See the LICENSE file or go to https://EonaCat.com/License for full license details. + +internal sealed class OffsetTimeSource : ITimeSource +{ + private readonly ITimeSource _inner; + private readonly TimeSpan _offset; + + public OffsetTimeSource(ITimeSource inner, TimeSpan offset) + { + _inner = inner; + _offset = offset; + } + + public DateTime UtcNow => _inner.UtcNow + _offset; + public long Timestamp => _inner.Timestamp; +} diff --git a/EonaCat.DeterministicTime/EonaCat.DeterministicTime/SystemTimeSource.cs b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/SystemTimeSource.cs new file mode 100644 index 0000000..812176d --- /dev/null +++ b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/SystemTimeSource.cs @@ -0,0 +1,13 @@ +using System; +using System.Diagnostics; + +namespace EonaCat.DeterministicTime; + +// This file is part of the EonaCat project(s) which is released under the Apache License. +// See the LICENSE file or go to https://EonaCat.com/License for full license details. + +internal sealed class SystemTimeSource : ITimeSource +{ + public DateTime UtcNow => DateTime.UtcNow; + public long Timestamp => Stopwatch.GetTimestamp(); +} diff --git a/EonaCat.DeterministicTime/EonaCat.DeterministicTime/TimeRecording.cs b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/TimeRecording.cs new file mode 100644 index 0000000..1395308 --- /dev/null +++ b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/TimeRecording.cs @@ -0,0 +1,42 @@ +using EonaCat.Json; +using System; +using System.Collections.Generic; +using System.IO; + +namespace EonaCat.DeterministicTime; + +// This file is part of the EonaCat project(s) which is released under the Apache License. +// See the LICENSE file or go to https://EonaCat.com/License for full license details. + +public sealed class TimeRecording : ITimeSource, IDisposable +{ + private readonly ITimeSource _inner; + private readonly List _log = new(); + private readonly IDisposable _scope; + + private TimeRecording(ITimeSource inner) + { + _inner = inner; + _scope = DeterministicTime.Push(this); + } + + public static TimeRecording Start() => + new(new SystemTimeSource()); + + public DateTime UtcNow + { + get + { + var value = _inner.UtcNow; + _log.Add(value); + return value; + } + } + + public long Timestamp => _inner.Timestamp; + + public void Save(string path) => + File.WriteAllText(path, JsonHelper.ToJson(_log)); + + public void Dispose() => _scope.Dispose(); +} diff --git a/EonaCat.DeterministicTime/EonaCat.DeterministicTime/TimeReplay.cs b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/TimeReplay.cs new file mode 100644 index 0000000..28104dd --- /dev/null +++ b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/TimeReplay.cs @@ -0,0 +1,38 @@ +using EonaCat.Json; +using System; +using System.Collections.Generic; +using System.Diagnostics; +using System.IO; + +namespace EonaCat.DeterministicTime; + +// This file is part of the EonaCat project(s) which is released under the Apache License. +// See the LICENSE file or go to https://EonaCat.com/License for full license details. + +public sealed class TimeReplay : ITimeSource, IDisposable +{ + private readonly Queue _queue; + private readonly IDisposable _scope; + + private TimeReplay(IEnumerable times) + { + _queue = new Queue(times); + _scope = DeterministicTime.Push(this); + } + + public static IDisposable Load(string path) + { + var times = JsonHelper.ToObject>( + File.ReadAllText(path))!; + return new TimeReplay(times); + } + + public DateTime UtcNow => + _queue.Count > 0 + ? _queue.Dequeue() + : throw new InvalidOperationException("Replay exhausted"); + + public long Timestamp => Stopwatch.GetTimestamp(); + + public void Dispose() => _scope.Dispose(); +} diff --git a/EonaCat.DeterministicTime/EonaCat.DeterministicTime/TimeScope.cs b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/TimeScope.cs new file mode 100644 index 0000000..a470e74 --- /dev/null +++ b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/TimeScope.cs @@ -0,0 +1,26 @@ +using System; + +namespace EonaCat.DeterministicTime; + +// This file is part of the EonaCat project(s) which is released under the Apache License. +// See the LICENSE file or go to https://EonaCat.com/License for full license details. + +public static class TimeScope +{ + public static IDisposable Frozen(DateTime utc) => + DeterministicTime.Push(new VirtualTimeSource(utc, 0)); + + public static IDisposable Scaled(double scale) + { + if (scale < 0) + { + throw new ArgumentOutOfRangeException(nameof(scale)); + } + + return DeterministicTime.Push( + new VirtualTimeSource(DeterministicTime.UtcNow, scale)); + } + + public static IDisposable Offset(TimeSpan offset) => + DeterministicTime.WithOffset(offset); +} diff --git a/EonaCat.DeterministicTime/EonaCat.DeterministicTime/VirtualTimeSource.cs b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/VirtualTimeSource.cs new file mode 100644 index 0000000..deb4a91 --- /dev/null +++ b/EonaCat.DeterministicTime/EonaCat.DeterministicTime/VirtualTimeSource.cs @@ -0,0 +1,55 @@ +using System; +using System.Diagnostics; + +namespace EonaCat.DeterministicTime; + +// This file is part of the EonaCat project(s) which is released under the Apache License. +// See the LICENSE file or go to https://EonaCat.com/License for full license details. + +internal sealed class VirtualTimeSource : IAdjustableTimeSource +{ + private DateTime _baseTime; + private long _baseTimestamp; + private readonly double _scale; + + public VirtualTimeSource(DateTime startUtc, double scale) + { + _baseTime = DateTime.SpecifyKind(startUtc, DateTimeKind.Utc); + _baseTimestamp = Stopwatch.GetTimestamp(); + _scale = scale; + } + + public DateTime UtcNow + { + get + { + long nowTicks = Stopwatch.GetTimestamp(); + long deltaTicks = nowTicks - _baseTimestamp; + + // Convert delta ticks to TimeSpan + double deltaSeconds = (double)deltaTicks / Stopwatch.Frequency; + var elapsed = TimeSpan.FromSeconds(deltaSeconds); + + // Apply scale + long scaledTicks = (long)(elapsed.Ticks * _scale); + + return _baseTime.AddTicks(scaledTicks); + } + } + + + public long Timestamp + { + get + { + var delta = Stopwatch.GetTimestamp() - _baseTimestamp; + return _baseTimestamp + (long)(delta * _scale); + } + } + + public void Advance(TimeSpan delta) + { + _baseTime = _baseTime.Add(delta); + _baseTimestamp = Stopwatch.GetTimestamp(); + } +} diff --git a/LICENSE b/LICENSE index 386c7ef..ab37379 100644 --- a/LICENSE +++ b/LICENSE @@ -1,73 +1,204 @@ -Apache License -Version 2.0, January 2004 -http://www.apache.org/licenses/ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + https://EonaCat.com/license/ -TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + OF SOFTWARE BY EONACAT (JEROEN SAEY) -1. Definitions. + 1. Definitions. -"License" shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document. + "License" shall mean the terms and conditions for use, reproduction, + and distribution as defined by Sections 1 through 9 of this document. -"Licensor" shall mean the copyright owner or entity authorized by the copyright owner that is granting the License. + "Licensor" shall mean the copyright owner or entity authorized by + the copyright owner that is granting the License. -"Legal Entity" shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that entity. 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. -Copyright 2025 EonaCat + Copyright [yyyy] [name of copyright owner] -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 + 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 + 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. + 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. diff --git a/README.md b/README.md index c30c94a..f17042f 100644 --- a/README.md +++ b/README.md @@ -1,3 +1,219 @@ -# EonaCat.DeterministicTime +# EonaCat.DeterministicTime + +EonaCat.DeterministicTime is a **.NET library for deterministic, testable, and replayable time**. + +It replaces `DateTime.UtcNow`, `Stopwatch`, `Timer`, and `Task.Delay` with deterministic equivalents and supports advanced features like: + + scheduling, + time scaling, + replay, + NTP offsets, + ASP.NET Framework integration. + ASP.NET Core integration. + +--- + +## Installation + +``` +dotnet add package EonaCat.DeterministicTime +``` + + +### ASP.NET Core integration (optional) + +``` +dotnet add package DeterministicTime.AspNetCore +``` + +### ASP.NET Framework integration (optional) + +``` +dotnet add package DeterministicTime.AspNetFramework +``` + +ASP.NET 4.8 → add DeterministicTime.AspNetFramework and register HttpModule in web.config: +```xml + + + + + +``` + +--- +## Basic Usage + +```csharp +using DeterministicTime; + +DateTime now = DeterministicTime.UtcNow; +DateTime localNow = DeterministicTime.Now; +``` + +--- +## Freeze Time + +```csharp +using (TimeScope.Frozen(DateTime.Parse("2025-01-01T00:00:00Z"))) +{ + Console.WriteLine(DeterministicTime.UtcNow); // frozen +} +``` + +--- +## Scale Time + +```csharp +using (TimeScope.Scaled(10)) // 10x faster +{ +// all timers and delays scale 10x +} +``` + +--- + +## Advance Time Manually + +```csharp +DeterministicTime.Advance(TimeSpan.FromHours(2)); +``` + +--- + +## Offset Time + +```csharp +using (TimeScope.Offset(TimeSpan.FromMinutes(5))) +{ + // all UtcNow calls are offset by 5 minutes +} +``` + +--- + +## Deterministic Stopwatch + +```csharp +var sw = DeterministicStopwatch.StartNew(); +// do work +sw.Stop(); +Console.WriteLine(sw.Elapsed); +``` + + +--- + +## Deterministic Timer + +```csharp +int fired = 0; +DeterministicTimer.Start(TimeSpan.FromSeconds(10), () => fired++); +DeterministicTime.Advance(TimeSpan.FromSeconds(10)); +Console.WriteLine(fired); // 1 +``` + +--- + +## Deterministic Delay + +```csharp +bool completed = false; +await DeterministicDelay.For(TimeSpan.FromSeconds(5)).ContinueWith(_ => completed = true); +DeterministicTime.Advance(TimeSpan.FromSeconds(5)); +Console.WriteLine(completed); // true +``` + + +--- + +## Deterministic Scheduler + +```csharp +var scheduler = DeterministicScheduler.Global; +scheduler.Every(TimeSpan.FromMinutes(1), () => Console.WriteLine("Tick")); +DeterministicTime.Advance(TimeSpan.FromMinutes(5)); // fires 5 times +``` + +--- + +## Time Recording & Replay + +### Record + +```csharp +using var recording = TimeRecording.Start(); +// run code +recording.Save("run.json"); +``` + +### Replay + +```csharp +using (TimeReplay.Load("run.json")) +{ + // deterministic replay of UtcNow calls +} +``` + +--- + +## NTP Synchronization + +```csharp +using (NtpSynchronization.Sync(myNtpProvider)) +{ + // deterministic time aligned with NTP +} + +``` + +--- + +## Distributed Time Source + +```csharp +IDistributedTimeCoordinator coordinator = ...; +DeterministicTime.Push(new DistributedTimeSource(coordinator)); +Console.WriteLine(DeterministicTime.UtcNow); +``` + +--- + +## ASP.NET Core Middleware + +```csharp +app.UseDeterministicTime(); +``` + +* Each request runs in its own deterministic scope + +* Works with frozen/scaled time and timers + + +--- + + +## Advanced Features Summary + +* **Deterministic UtcNow & Now** + +* **Stopwatch replacement** + +* **One-shot and repeated timers** + +* **Task.Delay replacement** + +* **Time scaling, freezing, offset** + +* **Scheduler for background jobs** + +* **Recording & replay for testing** + +* **NTP synchronization & distributed clocks** + +* **ASP.NET Framework integration** + +* **ASP.NET Core integration** + -EonaCat.DeterministicTime \ No newline at end of file diff --git a/icon.png b/icon.png new file mode 100644 index 0000000..0595b89 Binary files /dev/null and b/icon.png differ