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Nov 13, 2023
Merged

Fix line endings #474

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334 changes: 167 additions & 167 deletions BitFaster.Caching.UnitTests/Atomic/AsyncAtomicFactoryTests.cs
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Original file line number Diff line number Diff line change
@@ -1,169 +1,169 @@
using System;
using System.Threading;
using System.Threading.Tasks;
using BitFaster.Caching.Atomic;
using FluentAssertions;
using Xunit;

namespace BitFaster.Caching.UnitTests.Atomic
{
public class AsyncAtomicFactoryTests
{
[Fact]
public void DefaultCtorValueIsNotCreated()
{
var a = new AsyncAtomicFactory<int, int>();

a.IsValueCreated.Should().BeFalse();
a.ValueIfCreated.Should().Be(0);
}

[Fact]
public void WhenValuePassedToCtorValueIsStored()
{
var a = new AsyncAtomicFactory<int, int>(1);

a.ValueIfCreated.Should().Be(1);
a.IsValueCreated.Should().BeTrue();
}

[Fact]
public async Task WhenValueCreatedValueReturned()
{
var a = new AsyncAtomicFactory<int, int>();
(await a.GetValueAsync(1, k => Task.FromResult(2))).Should().Be(2);

a.ValueIfCreated.Should().Be(2);
a.IsValueCreated.Should().BeTrue();
}

[Fact]
public async Task WhenValueCreatedWithArgValueReturned()
{
var a = new AsyncAtomicFactory<int, int>();
(await a.GetValueAsync(1, (k, a) => Task.FromResult(k + a), 7)).Should().Be(8);

a.ValueIfCreated.Should().Be(8);
a.IsValueCreated.Should().BeTrue();
}

[Fact]
public async Task WhenValueCreatedGetValueReturnsOriginalValue()
{
var a = new AsyncAtomicFactory<int, int>();
await a.GetValueAsync(1, k => Task.FromResult(2));
(await a.GetValueAsync(1, k => Task.FromResult(3))).Should().Be(2);
}

[Fact]
public async Task WhenValueCreatedArgGetValueReturnsOriginalValue()
{
var a = new AsyncAtomicFactory<int, int>();
await a.GetValueAsync(1, (k, a) => Task.FromResult(k + a), 7);
(await a.GetValueAsync(1, (k, a) => Task.FromResult(k + a), 9)).Should().Be(8);
}

[Fact]
public async Task WhenValueCreateThrowsValueIsNotStored()
{
var a = new AsyncAtomicFactory<int, int>();

Func<Task> getOrAdd = async () => { await a.GetValueAsync(1, k => throw new ArithmeticException()); };

await getOrAdd.Should().ThrowAsync<ArithmeticException>();

(await a.GetValueAsync(1, k => Task.FromResult(3))).Should().Be(3);
}

[Fact]
public async Task WhenCallersRunConcurrentlyResultIsFromWinner()
{
var enter = new TaskCompletionSource<bool>(TaskCreationOptions.RunContinuationsAsynchronously);
var resume = new TaskCompletionSource<bool>(TaskCreationOptions.RunContinuationsAsynchronously);

var atomicFactory = new AsyncAtomicFactory<int, int>();
var result = 0;
var winnerCount = 0;

var first = atomicFactory.GetValueAsync(1, async k =>
{
enter.SetResult(true);
await resume.Task;

result = 1;
Interlocked.Increment(ref winnerCount);
return 1;
});

var second = atomicFactory.GetValueAsync(1, async k =>
{
enter.SetResult(true);
await resume.Task;

result = 2;
Interlocked.Increment(ref winnerCount);
return 2;
});

await enter.Task;
resume.SetResult(true);

(await first).Should().Be(result);
(await second).Should().Be(result);

winnerCount.Should().Be(1);
using System;
using System.Threading;
using System.Threading.Tasks;
using BitFaster.Caching.Atomic;
using FluentAssertions;
using Xunit;

namespace BitFaster.Caching.UnitTests.Atomic
{
public class AsyncAtomicFactoryTests
{
[Fact]
public void DefaultCtorValueIsNotCreated()
{
var a = new AsyncAtomicFactory<int, int>();

a.IsValueCreated.Should().BeFalse();
a.ValueIfCreated.Should().Be(0);
}

[Fact]
public void WhenValuePassedToCtorValueIsStored()
{
var a = new AsyncAtomicFactory<int, int>(1);

a.ValueIfCreated.Should().Be(1);
a.IsValueCreated.Should().BeTrue();
}

[Fact]
public async Task WhenValueCreatedValueReturned()
{
var a = new AsyncAtomicFactory<int, int>();
(await a.GetValueAsync(1, k => Task.FromResult(2))).Should().Be(2);

a.ValueIfCreated.Should().Be(2);
a.IsValueCreated.Should().BeTrue();
}

[Fact]
public async Task WhenValueCreatedWithArgValueReturned()
{
var a = new AsyncAtomicFactory<int, int>();
(await a.GetValueAsync(1, (k, a) => Task.FromResult(k + a), 7)).Should().Be(8);

a.ValueIfCreated.Should().Be(8);
a.IsValueCreated.Should().BeTrue();
}

[Fact]
public async Task WhenValueCreatedGetValueReturnsOriginalValue()
{
var a = new AsyncAtomicFactory<int, int>();
await a.GetValueAsync(1, k => Task.FromResult(2));
(await a.GetValueAsync(1, k => Task.FromResult(3))).Should().Be(2);
}

[Fact]
public async Task WhenValueCreatedArgGetValueReturnsOriginalValue()
{
var a = new AsyncAtomicFactory<int, int>();
await a.GetValueAsync(1, (k, a) => Task.FromResult(k + a), 7);
(await a.GetValueAsync(1, (k, a) => Task.FromResult(k + a), 9)).Should().Be(8);
}

[Fact]
public async Task WhenValueCreateThrowsValueIsNotStored()
{
var a = new AsyncAtomicFactory<int, int>();

Func<Task> getOrAdd = async () => { await a.GetValueAsync(1, k => throw new ArithmeticException()); };

await getOrAdd.Should().ThrowAsync<ArithmeticException>();

(await a.GetValueAsync(1, k => Task.FromResult(3))).Should().Be(3);
}

[Fact]
public async Task WhenCallersRunConcurrentlyResultIsFromWinner()
{
var enter = new TaskCompletionSource<bool>(TaskCreationOptions.RunContinuationsAsynchronously);
var resume = new TaskCompletionSource<bool>(TaskCreationOptions.RunContinuationsAsynchronously);

var atomicFactory = new AsyncAtomicFactory<int, int>();
var result = 0;
var winnerCount = 0;

var first = atomicFactory.GetValueAsync(1, async k =>
{
enter.SetResult(true);
await resume.Task;

result = 1;
Interlocked.Increment(ref winnerCount);
return 1;
});

var second = atomicFactory.GetValueAsync(1, async k =>
{
enter.SetResult(true);
await resume.Task;

result = 2;
Interlocked.Increment(ref winnerCount);
return 2;
});

await enter.Task;
resume.SetResult(true);

(await first).Should().Be(result);
(await second).Should().Be(result);

winnerCount.Should().Be(1);
}

[Fact]
public void WhenValueNotCreatedHashCodeIsZero()
{
new AsyncAtomicFactory<int, int>()
.GetHashCode()
.Should().Be(0);
}

[Fact]
public void WhenValueCreatedHashCodeIsValueHashCode()
{
new AsyncAtomicFactory<int, int>(1)
.GetHashCode()
.Should().Be(1);
}

[Fact]
public void WhenValueNotCreatedEqualsFalse()
{
var a = new AsyncAtomicFactory<int, int>();
var b = new AsyncAtomicFactory<int, int>();

a.Equals(b).Should().BeFalse();
}

[Fact]
public void WhenValueNotCreatedHashCodeIsZero()
{
new AsyncAtomicFactory<int, int>()
.GetHashCode()
.Should().Be(0);
}

[Fact]
public void WhenValueCreatedHashCodeIsValueHashCode()
{
new AsyncAtomicFactory<int, int>(1)
.GetHashCode()
.Should().Be(1);
}

[Fact]
public void WhenValueNotCreatedEqualsFalse()
{
var a = new AsyncAtomicFactory<int, int>();
var b = new AsyncAtomicFactory<int, int>();

a.Equals(b).Should().BeFalse();
}

[Fact]
public void WhenOtherValueNotCreatedEqualsFalse()
{
var a = new AsyncAtomicFactory<int, int>(1);
var b = new AsyncAtomicFactory<int, int>();

a.Equals(b).Should().BeFalse();
}

[Fact]
public void WhenArgNullEqualsFalse()
{
new AsyncAtomicFactory<int, int>(1)
.Equals(null)
.Should().BeFalse();
}

[Fact]
public void WhenArgObjectValuesAreSameEqualsTrue()
{
object other = new AsyncAtomicFactory<int, int>(1);

new AsyncAtomicFactory<int, int>(1)
.Equals(other)
.Should().BeTrue();
}
}
}
[Fact]
public void WhenOtherValueNotCreatedEqualsFalse()
{
var a = new AsyncAtomicFactory<int, int>(1);
var b = new AsyncAtomicFactory<int, int>();

a.Equals(b).Should().BeFalse();
}

[Fact]
public void WhenArgNullEqualsFalse()
{
new AsyncAtomicFactory<int, int>(1)
.Equals(null)
.Should().BeFalse();
}

[Fact]
public void WhenArgObjectValuesAreSameEqualsTrue()
{
object other = new AsyncAtomicFactory<int, int>(1);

new AsyncAtomicFactory<int, int>(1)
.Equals(other)
.Should().BeTrue();
}
}
}
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