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| 1 | +using Microsoft.Extensions.DependencyInjection; |
| 2 | +using Xunit; |
| 3 | + |
| 4 | +namespace Locks.Tests |
| 5 | +{ |
| 6 | + public sealed class MemoryLockTests |
| 7 | + { |
| 8 | + private readonly IServiceProvider _serviceProvider = new ServiceCollection().AddMemoryLock().BuildServiceProvider(); |
| 9 | + |
| 10 | + [Fact(DisplayName = "Memory lock works correct in multi-thread enviroment")] |
| 11 | + public async Task Test() |
| 12 | + { |
| 13 | + var memoryLock = _serviceProvider.GetRequiredService<IMemoryLock>(); |
| 14 | + |
| 15 | + const string lockKeyA = "A"; |
| 16 | + const string lockKeyB = "B"; |
| 17 | + const string lockKeyC = "C"; |
| 18 | + |
| 19 | + for (var i = 0; i < 3; i++) |
| 20 | + { |
| 21 | + var a1 = memoryLock.Acquire(lockKeyA); |
| 22 | + var b1 = memoryLock.Acquire(lockKeyB); |
| 23 | + var c1 = memoryLock.Acquire(lockKeyC); |
| 24 | + |
| 25 | + var a2 = memoryLock.Acquire(lockKeyA); |
| 26 | + var b2 = memoryLock.Acquire(lockKeyB); |
| 27 | + var c2 = memoryLock.Acquire(lockKeyC); |
| 28 | + |
| 29 | + var a3 = memoryLock.Acquire(lockKeyA); |
| 30 | + var b3 = memoryLock.Acquire(lockKeyB); |
| 31 | + var c3 = memoryLock.Acquire(lockKeyC); |
| 32 | + |
| 33 | + await Task.WhenAll(a1, b1, c1); |
| 34 | + |
| 35 | + Assert.True(a1.IsCompleted, Message(nameof(a1))); |
| 36 | + Assert.True(b1.IsCompleted, Message(nameof(b1))); |
| 37 | + Assert.True(c1.IsCompleted, Message(nameof(c1))); |
| 38 | + |
| 39 | + // Second tasks should wait when locks will be released |
| 40 | + Assert.False(a2.IsCompleted, Message(nameof(a2), nameof(a1))); |
| 41 | + Assert.False(b2.IsCompleted, Message(nameof(b2), nameof(b1))); |
| 42 | + Assert.False(c2.IsCompleted, Message(nameof(c2), nameof(c1))); |
| 43 | + |
| 44 | + Assert.False(a3.IsCompleted, Message(nameof(a3), nameof(a1))); |
| 45 | + Assert.False(b3.IsCompleted, Message(nameof(b3), nameof(b1))); |
| 46 | + Assert.False(c3.IsCompleted, Message(nameof(c3), nameof(c1))); |
| 47 | + |
| 48 | + // When first tasks release locks, second tasks can continue |
| 49 | + a1.Result.Dispose(); |
| 50 | + b1.Result.Dispose(); |
| 51 | + c1.Result.Dispose(); |
| 52 | + |
| 53 | + await Task.WhenAll(a2, b2, c2); |
| 54 | + |
| 55 | + Assert.True(a2.IsCompleted, Message(nameof(a2))); |
| 56 | + Assert.True(b2.IsCompleted, Message(nameof(b2))); |
| 57 | + Assert.True(c2.IsCompleted, Message(nameof(c2))); |
| 58 | + |
| 59 | + Assert.False(a3.IsCompleted, Message(nameof(a3), nameof(a2))); |
| 60 | + Assert.False(b3.IsCompleted, Message(nameof(b3), nameof(b2))); |
| 61 | + Assert.False(c3.IsCompleted, Message(nameof(c3), nameof(c2))); |
| 62 | + |
| 63 | + a2.Result.Dispose(); |
| 64 | + b2.Result.Dispose(); |
| 65 | + c2.Result.Dispose(); |
| 66 | + |
| 67 | + await Task.WhenAll(a3, b3, c3); |
| 68 | + |
| 69 | + Assert.True(a3.IsCompleted, Message(nameof(a3))); |
| 70 | + Assert.True(b3.IsCompleted, Message(nameof(b3))); |
| 71 | + Assert.True(c3.IsCompleted, Message(nameof(c3))); |
| 72 | + |
| 73 | + a3.Result.Dispose(); |
| 74 | + b3.Result.Dispose(); |
| 75 | + c3.Result.Dispose(); |
| 76 | + } |
| 77 | + } |
| 78 | + |
| 79 | + private string Message(string x) => $"Task {x} should be completed."; |
| 80 | + |
| 81 | + private string Message(string x, string y) => $"Task {x} did not wait for task {y} to release the distributed lock."; |
| 82 | + } |
| 83 | +} |
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