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test: cleaning up tests for locking

This commit is contained in:
Dylan R. E. Moonfire 2021-01-21 17:33:53 -06:00
parent 54d05c8485
commit 28898dbaff
4 changed files with 153 additions and 233 deletions
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1
MfGames.Locking.sln.DotSettings
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@ -1365,4 +1365,5 @@ using(DataAccessAdapter dataAccessAdapter = new DataAccessAdapter(ConnectionStri
<s:Boolean x:Key="/Default/PatternsAndTemplates/LiveTemplates/Template/=F87CBA43E9CDCC41A45B39A2A2A25764/Scope/=2C285F182AC98D44B0B4F29D4D2149EC/@KeyIndexDefined">True</s:Boolean>
<s:String x:Key="/Default/PatternsAndTemplates/LiveTemplates/Template/=F87CBA43E9CDCC41A45B39A2A2A25764/Scope/=2C285F182AC98D44B0B4F29D4D2149EC/CustomProperties/=minimumLanguageVersion/@EntryIndexedValue">2.0</s:String>
<s:String x:Key="/Default/PatternsAndTemplates/LiveTemplates/Template/=F87CBA43E9CDCC41A45B39A2A2A25764/Scope/=2C285F182AC98D44B0B4F29D4D2149EC/Type/@EntryValue">InCSharpStatement</s:String>
<s:Boolean x:Key="/Default/UserDictionary/Words/=Tocks/@EntryIndexedValue">True</s:Boolean>
</wpf:ResourceDictionary>

14
src/MfGames.Locking.Tests/LockAction.cs Normal file
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@ -0,0 +1,14 @@
namespace MfGames.Locking.Tests
{
/// <summary>
/// The various states for testing lock logic.
/// </summary>
internal enum LockAction
{
BeforeLock,
InLock,
AfterLock,
}
}

367
src/MfGames.Locking.Tests/LockTests.cs
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@ -3,318 +3,223 @@ using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using KellermanSoftware.CompareNetObjects;
using Xunit;
using Xunit.Abstractions;
using Xunit.Sdk;
namespace MfGames.Locking.Tests
{
public class LockTests
{
public static readonly TimeSpan ProcessTime =
TimeSpan.FromMilliseconds(50);
private readonly List<int> events;
private readonly ReaderWriterLockSlim locker;
private readonly ITestOutputHelper output;
private readonly List<(int, LockAction)> sequenceRecord;
private readonly DateTime start;
private readonly object syncLock;
public LockTests(ITestOutputHelper output)
public LockTests()
{
this.output = output;
this.start = DateTime.UtcNow;
this.syncLock = new object();
this.sequenceRecord = new List<(int, LockAction)>();
this.locker = new ReaderWriterLockSlim();
this.events = new List<int>();
}
private TimeSpan Elapsed => DateTime.UtcNow - this.start;
[Fact]
public void BasicDataGatheringWorks()
{
this.Report(ProcessTime, 1);
this.Verify();
}
[Fact]
public void ReadBlocksWrite()
{
Task.WaitAll(
Task.Run(
() => this.ReportInReadLock(
ProcessTime * 0,
ProcessTime * 3,
1)),
Task.Run(
() => this.ReportInWriteLock(
ProcessTime * 1,
ProcessTime * 1,
2)));
Task.Run(() => this.TestRead(1, 5, 1)),
Task.Run(() => this.TestWrite(2, 2, 2)));
this.Verify();
this.VerifySequenceRecord(
(1, LockAction.BeforeLock),
(1, LockAction.InLock),
(2, LockAction.BeforeLock),
(1, LockAction.AfterLock),
(2, LockAction.InLock),
(2, LockAction.AfterLock));
}
[Fact]
public void ReadsDoNotBlockReads()
{
Task.WaitAll(
Task.Run(
() => this.ReportInReadLock(
ProcessTime,
ProcessTime * 5,
3)),
Task.Run(
() => this.ReportInReadLock(
ProcessTime * 2,
ProcessTime,
1)),
Task.Run(
() => this.ReportInReadLock(
ProcessTime * 2,
ProcessTime * 2,
2)));
Task.Run(() => this.TestRead(1, 7, 1)),
Task.Run(() => this.TestRead(2, 1, 2)),
Task.Run(() => this.TestRead(4, 1, 3)));
this.Verify();
}
[Fact]
public void ThreadedDataGatheringWorks()
{
Task.WaitAll(
Task.Run(
() => this.ReportInReadLock(ProcessTime, ProcessTime, 1)));
this.Verify();
this.VerifySequenceRecord(
(1, LockAction.BeforeLock),
(1, LockAction.InLock),
(2, LockAction.BeforeLock),
(2, LockAction.InLock),
(2, LockAction.AfterLock),
(3, LockAction.BeforeLock),
(3, LockAction.InLock),
(3, LockAction.AfterLock),
(1, LockAction.AfterLock));
}
[Fact]
public void UpgradableBlocksUpgradable()
{
Task.WaitAll(
Task.Run(
() => this.ReportInUpgradableLock(
ProcessTime,
ProcessTime * 5,
1)),
Task.Run(
() => this.ReportInUpgradableLock(
ProcessTime * 3,
ProcessTime,
2)),
Task.Run(
() => this.ReportInUpgradableLock(
ProcessTime * 2,
ProcessTime * 2,
3)));
Task.Run(() => this.TestUpgradable(1, 6, 1)),
Task.Run(() => this.TestUpgradable(2, 2, 2)),
Task.Run(() => this.TestUpgradable(4, 1, 3)));
this.Verify();
this.VerifySequenceRecord(
(1, LockAction.BeforeLock),
(1, LockAction.InLock),
(2, LockAction.BeforeLock),
(3, LockAction.BeforeLock),
(1, LockAction.AfterLock),
(2, LockAction.InLock),
(2, LockAction.AfterLock),
(3, LockAction.InLock),
(3, LockAction.AfterLock));
}
[Fact]
public void UpgradableDoesNotBlockReads()
{
Task.WaitAll(
Task.Run(
() => this.ReportInUpgradableLock(
ProcessTime,
ProcessTime * 5,
3)),
Task.Run(
() => this.ReportInReadLock(
ProcessTime * 2,
ProcessTime,
1)),
Task.Run(
() => this.ReportInReadLock(
ProcessTime * 2,
ProcessTime * 2,
2)));
Task.Run(() => this.TestUpgradable(1, 6, 1)),
Task.Run(() => this.TestRead(2, 1, 2)),
Task.Run(() => this.TestRead(4, 1, 3)));
this.Verify();
this.VerifySequenceRecord(
(1, LockAction.BeforeLock),
(1, LockAction.InLock),
(2, LockAction.BeforeLock),
(2, LockAction.InLock),
(2, LockAction.AfterLock),
(3, LockAction.BeforeLock),
(3, LockAction.InLock),
(3, LockAction.AfterLock),
(1, LockAction.AfterLock));
}
[Fact]
public void WriteBlockRead()
{
Task.WaitAll(
Task.Run(
() => this.ReportInWriteLock(
ProcessTime,
ProcessTime * 3,
1)),
Task.Run(
() => this.ReportInReadLock(
ProcessTime * 2,
ProcessTime,
2)));
Task.Run(() => this.TestWrite(1, 6, 1)),
Task.Run(() => this.TestRead(2, 1, 2)));
this.Verify();
this.VerifySequenceRecord(
(1, LockAction.BeforeLock),
(1, LockAction.InLock),
(2, LockAction.BeforeLock),
(1, LockAction.AfterLock),
(2, LockAction.InLock),
(2, LockAction.AfterLock));
}
[Fact]
public void WriteBlockReads()
{
Task.WaitAll(
Task.Run(
() => this.ReportInWriteLock(
ProcessTime,
ProcessTime * 5,
1)),
Task.Run(
() => this.ReportInReadLock(
ProcessTime * 2,
ProcessTime,
2)),
Task.Run(
() => this.ReportInReadLock(
ProcessTime * 2,
ProcessTime * 2,
3)));
Task.Run(() => this.TestWrite(1, 6, 1)),
Task.Run(() => this.TestRead(2, 1, 2)));
this.Verify();
this.VerifySequenceRecord(
(1, LockAction.BeforeLock),
(1, LockAction.InLock),
(2, LockAction.BeforeLock),
(1, LockAction.AfterLock),
(2, LockAction.InLock),
(2, LockAction.AfterLock));
}
private void AddEvent(int sequence)
private void RecordSequenceAction(int sequence, LockAction action)
{
// This is a monitor lock on the slim, just to give us a second lock.
lock (this.locker)
lock (this.syncLock)
{
this.output.WriteLine(
this.Elapsed + ": " + sequence + " => adding sequence");
this.events.Add(sequence);
this.sequenceRecord.Add((sequence, action));
}
}
/// <summary>
/// Waits a short period of time and then injects the sequence into the event list.
/// </summary>
private void Report(
TimeSpan processTime,
private void Test(
Func<ReaderWriterLockSlim, IDisposable> getLock,
int settleTocks,
int waitTocks,
int sequence)
{
this.output.WriteLine(
this.Elapsed + ": " + sequence + " => starting process");
Thread.Sleep(processTime);
this.output.WriteLine(
this.Elapsed + ": " + sequence + " => finished process");
this.AddEvent(sequence);
}
Thread.Sleep(50 * settleTocks);
private void ReportInReadLock(
TimeSpan settleTime,
TimeSpan processTime,
int sequence)
{
this.output.WriteLine(
this.Elapsed
+ ": "
+ sequence
+ " => entering read lock: "
+ sequence);
this.RecordSequenceAction(sequence, LockAction.BeforeLock);
Thread.Sleep(settleTime);
this.output.WriteLine(
this.Elapsed
+ ": "
+ sequence
+ " => locking read lock: "
+ sequence);
using (new ReadLock(this.locker))
using (getLock(this.locker))
{
this.output.WriteLine(
this.Elapsed
+ ": "
+ sequence
+ " => starting read lock: "
+ sequence);
Thread.Sleep(10);
this.Report(processTime, sequence);
this.RecordSequenceAction(sequence, LockAction.InLock);
Thread.Sleep(50 * waitTocks);
this.RecordSequenceAction(sequence, LockAction.AfterLock);
}
}
private void ReportInUpgradableLock(
TimeSpan settleTime,
TimeSpan processTime,
private void TestRead(
int settleTocks,
int waitTocks,
int sequence)
{
this.output.WriteLine(
this.Elapsed
+ ": "
+ sequence
+ " => entering upgradable lock: "
+ sequence);
Thread.Sleep(settleTime);
this.output.WriteLine(
this.Elapsed
+ ": "
+ sequence
+ " => locking upgradable lock: "
+ sequence);
using (new UpgradableLock(this.locker))
{
this.output.WriteLine(
this.Elapsed
+ ": "
+ sequence
+ " => starting upgradable lock: "
+ sequence);
this.Report(processTime, sequence);
}
this.Test(
x => new ReadLock(x),
settleTocks,
waitTocks,
sequence);
}
private void ReportInWriteLock(
TimeSpan settleTime,
TimeSpan processTime,
private void TestUpgradable(
int settleTocks,
int waitTocks,
int sequence)
{
this.output.WriteLine(
this.Elapsed
+ ": "
+ sequence
+ " => entering write lock: "
+ sequence);
Thread.Sleep(settleTime);
this.output.WriteLine(
this.Elapsed
+ ": "
+ sequence
+ " => locking write lock: "
+ sequence);
using (new WriteLock(this.locker))
{
this.output.WriteLine(
this.Elapsed
+ ": "
+ sequence
+ " => starting write lock: "
+ sequence);
this.Report(processTime, sequence);
}
this.Test(
x => new UpgradableLock(x),
settleTocks,
waitTocks,
sequence);
}
/// <summary>
/// Verifies the sequence of events.
/// </summary>
private void Verify()
private void TestWrite(
int settleTocks,
int waitTocks,
int sequence)
{
this.output.WriteLine(
"Final Sequence: " + string.Join(", ", this.events));
this.Test(
x => new WriteLock(x),
settleTocks,
waitTocks,
sequence);
}
for (int i = 1; i <= this.events.Count; i++)
private void VerifySequenceRecord(
params (int, LockAction BeforeLock)[] values)
{
lock (this.syncLock)
{
Assert.Equal(i, this.events[i - 1]);
var compareLogic = new CompareLogic
{
Config =
{
IgnoreObjectTypes = true,
MaxDifferences = 2,
}
};
ComparisonResult result = compareLogic.Compare(
values,
this.sequenceRecord);
if (!result.AreEqual)
{
throw new XunitException(result.DifferencesString);
}
}
}
}

4
src/MfGames.Locking.Tests/MfGames.Locking.Tests.csproj
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@ -1,12 +1,12 @@
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>netcoreapp2.1</TargetFramework>
<TargetFramework>net5</TargetFramework>
<IsPackable>false</IsPackable>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="CompareNETObjects" Version="4.70.0" />
<PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.7.0" />
<PackageReference Include="Roslynator.Analyzers" Version="3.0.0">
<PrivateAssets>all</PrivateAssets>