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CacheEntryScopeExpirationTests.cs
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CacheEntryScopeExpirationTests.cs
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// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using System;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.Extensions.Caching.Memory.Infrastructure;
using Microsoft.Extensions.Internal;
using Xunit;
namespace Microsoft.Extensions.Caching.Memory
{
public class CacheEntryScopeExpirationTests
{
private IMemoryCache CreateCache()
{
return CreateCache(new SystemClock());
}
private IMemoryCache CreateCache(ISystemClock clock)
{
return new MemoryCache(new MemoryCacheOptions()
{
Clock = clock,
});
}
[Fact]
public void SetPopulates_ExpirationTokens_IntoScopedLink()
{
var cache = CreateCache();
var obj = new object();
string key = "myKey";
ICacheEntry entry;
using (entry = cache.CreateEntry(key))
{
Assert.Same(entry, CacheEntryHelper.Current);
var expirationToken = new TestExpirationToken() { ActiveChangeCallbacks = true };
cache.Set(key, obj, new MemoryCacheEntryOptions().AddExpirationToken(expirationToken));
}
Assert.Single(((CacheEntry)entry)._expirationTokens);
Assert.Null(((CacheEntry)entry)._absoluteExpiration);
}
[Fact]
public void SetPopulates_AbsoluteExpiration_IntoScopeLink()
{
var cache = CreateCache();
var obj = new object();
string key = "myKey";
var time = new DateTimeOffset(2051, 1, 1, 1, 1, 1, TimeSpan.Zero);
ICacheEntry entry;
using (entry = cache.CreateEntry(key))
{
Assert.Same(entry, CacheEntryHelper.Current);
var expirationToken = new TestExpirationToken() { ActiveChangeCallbacks = true };
cache.Set(key, obj, new MemoryCacheEntryOptions().SetAbsoluteExpiration(time));
}
Assert.Null(((CacheEntry)entry)._expirationTokens);
Assert.NotNull(((CacheEntry)entry)._absoluteExpiration);
Assert.Equal(time, ((CacheEntry)entry)._absoluteExpiration);
}
[Fact]
public void TokenExpires_LinkedEntry()
{
var cache = CreateCache();
var obj = new object();
string key = "myKey";
string key1 = "myKey1";
var expirationToken = new TestExpirationToken() { ActiveChangeCallbacks = true };
using (var entry = cache.CreateEntry(key))
{
entry.SetValue(obj);
cache.Set(key1, obj, new MemoryCacheEntryOptions().AddExpirationToken(expirationToken));
}
Assert.Same(obj, cache.Get(key));
Assert.Same(obj, cache.Get(key1));
expirationToken.Fire();
Assert.False(cache.TryGetValue(key1, out object value));
Assert.False(cache.TryGetValue(key, out value));
}
[Fact]
public void TokenExpires_GetInLinkedEntry()
{
var cache = CreateCache();
var obj = new object();
string key = "myKey";
string key1 = "myKey1";
var expirationToken = new TestExpirationToken() { ActiveChangeCallbacks = true };
cache.GetOrCreate(key1, e =>
{
e.AddExpirationToken(expirationToken);
return obj;
});
using (var entry = cache.CreateEntry(key))
{
entry.SetValue(cache.Get(key1));
}
Assert.Same(obj, cache.Get(key));
Assert.Same(obj, cache.Get(key1));
expirationToken.Fire();
Assert.False(cache.TryGetValue(key1, out object value));
Assert.False(cache.TryGetValue(key, out value));
}
[Fact]
public void TokenExpires_ParentScopeEntry()
{
var cache = CreateCache();
var obj = new object();
string key = "myKey";
string key1 = "myKey1";
var expirationToken = new TestExpirationToken() { ActiveChangeCallbacks = true };
using (var entry = cache.CreateEntry(key))
{
entry.SetValue(obj);
using (var entry1 = cache.CreateEntry(key1))
{
entry1.SetValue(obj);
entry1.AddExpirationToken(expirationToken);
}
}
Assert.Same(obj, cache.Get(key));
Assert.Same(obj, cache.Get(key1));
expirationToken.Fire();
Assert.False(cache.TryGetValue(key1, out object value));
Assert.False(cache.TryGetValue(key, out value));
}
[Fact]
public void TokenExpires_ParentScopeEntry_WithFactory()
{
var cache = CreateCache();
var obj = new object();
string key = "myKey";
string key1 = "myKey1";
var expirationToken = new TestExpirationToken() { ActiveChangeCallbacks = true };
cache.GetOrCreate(key, entry =>
{
cache.GetOrCreate(key1, entry1 =>
{
entry1.AddExpirationToken(expirationToken);
return obj;
});
return obj;
});
Assert.Same(obj, cache.Get(key));
Assert.Same(obj, cache.Get(key1));
expirationToken.Fire();
Assert.False(cache.TryGetValue(key1, out object value));
Assert.False(cache.TryGetValue(key, out value));
}
[Fact]
public void TokenDoesntExpire_SiblingScopeEntry()
{
var cache = CreateCache();
var obj = new object();
string key = "myKey";
string key1 = "myKey1";
string key2 = "myKey2";
var expirationToken = new TestExpirationToken() { ActiveChangeCallbacks = true };
using (var entry = cache.CreateEntry(key))
{
entry.SetValue(obj);
using (var entry1 = cache.CreateEntry(key1))
{
entry1.SetValue(obj);
entry1.AddExpirationToken(expirationToken);
}
using (var entry2 = cache.CreateEntry(key2))
{
entry2.SetValue(obj);
}
}
Assert.Same(obj, cache.Get(key));
Assert.Same(obj, cache.Get(key1));
Assert.Same(obj, cache.Get(key2));
expirationToken.Fire();
Assert.False(cache.TryGetValue(key1, out object value));
Assert.False(cache.TryGetValue(key, out value));
Assert.True(cache.TryGetValue(key2, out value));
}
[Fact]
public void AbsoluteExpiration_WorksAcrossLink()
{
var clock = new TestClock();
var cache = CreateCache(clock);
var obj = new object();
string key = "myKey";
string key1 = "myKey1";
var expirationToken = new TestExpirationToken() { ActiveChangeCallbacks = true };
using (var entry = cache.CreateEntry(key))
{
entry.SetValue(obj);
cache.Set(key1, obj, new MemoryCacheEntryOptions().SetAbsoluteExpiration(TimeSpan.FromSeconds(5)));
}
Assert.Same(obj, cache.Get(key));
Assert.Same(obj, cache.Get(key1));
clock.Add(TimeSpan.FromSeconds(10));
Assert.False(cache.TryGetValue(key1, out object value));
Assert.False(cache.TryGetValue(key, out value));
}
[Fact]
public void AbsoluteExpiration_WorksAcrossNestedLink()
{
var clock = new TestClock();
var cache = CreateCache(clock);
var obj = new object();
string key1 = "myKey1";
string key2 = "myKey2";
var expirationToken = new TestExpirationToken() { ActiveChangeCallbacks = true };
using (var entry1 = cache.CreateEntry(key1))
{
entry1.SetValue(obj);
using (var entry2 = cache.CreateEntry(key2))
{
entry2.SetValue(obj);
entry2.SetAbsoluteExpiration(TimeSpan.FromSeconds(5));
}
}
Assert.Same(obj, cache.Get(key1));
Assert.Same(obj, cache.Get(key2));
clock.Add(TimeSpan.FromSeconds(10));
Assert.False(cache.TryGetValue(key1, out object value));
Assert.False(cache.TryGetValue(key2, out value));
}
[Fact]
public void AbsoluteExpiration_DoesntAffectSiblingLink()
{
var clock = new TestClock();
var cache = CreateCache(clock);
var obj = new object();
string key1 = "myKey1";
string key2 = "myKey2";
string key3 = "myKey3";
var expirationToken = new TestExpirationToken() { ActiveChangeCallbacks = true };
using (var entry1 = cache.CreateEntry(key1))
{
entry1.SetValue(obj);
using (var entry2 = cache.CreateEntry(key2))
{
entry2.SetValue(obj);
entry2.SetAbsoluteExpiration(TimeSpan.FromSeconds(5));
}
using (var entry3 = cache.CreateEntry(key3))
{
entry3.SetValue(obj);
entry3.SetAbsoluteExpiration(TimeSpan.FromSeconds(15));
}
}
Assert.Same(obj, cache.Get(key1));
Assert.Same(obj, cache.Get(key2));
Assert.Same(obj, cache.Get(key3));
clock.Add(TimeSpan.FromSeconds(10));
Assert.False(cache.TryGetValue(key1, out object value));
Assert.False(cache.TryGetValue(key2, out value));
Assert.True(cache.TryGetValue(key3, out value));
}
[Fact]
public void GetWithImplicitLinkPopulatesExpirationTokens()
{
var cache = CreateCache();
var obj = new object();
string key = "myKey";
string key1 = "myKey1";
Assert.Null(CacheEntryHelper.Current);
ICacheEntry entry;
using (entry = cache.CreateEntry(key))
{
Assert.Same(entry, CacheEntryHelper.Current);
var expirationToken = new TestExpirationToken() { ActiveChangeCallbacks = true };
cache.Set(key1, obj, new MemoryCacheEntryOptions().AddExpirationToken(expirationToken));
}
Assert.Null(CacheEntryHelper.Current);
Assert.Single(((CacheEntry)entry)._expirationTokens);
Assert.Null(((CacheEntry)entry)._absoluteExpiration);
}
[Fact]
public void LinkContextsCanNest()
{
var cache = CreateCache();
var obj = new object();
string key = "myKey";
string key1 = "myKey1";
Assert.Null(CacheEntryHelper.Current);
ICacheEntry entry;
ICacheEntry entry1;
using (entry = cache.CreateEntry(key))
{
Assert.Same(entry, CacheEntryHelper.Current);
using (entry1 = cache.CreateEntry(key1))
{
Assert.Same(entry1, CacheEntryHelper.Current);
var expirationToken = new TestExpirationToken() { ActiveChangeCallbacks = true };
entry1.SetValue(obj);
entry1.AddExpirationToken(expirationToken);
}
Assert.Same(entry, CacheEntryHelper.Current);
}
Assert.Null(CacheEntryHelper.Current);
Assert.Single(((CacheEntry)entry1)._expirationTokens);
Assert.Null(((CacheEntry)entry1)._absoluteExpiration);
Assert.Single(((CacheEntry)entry)._expirationTokens);
Assert.Null(((CacheEntry)entry)._absoluteExpiration);
}
[Fact]
public void NestedLinkContextsCanAggregate()
{
var clock = new TestClock();
var cache = CreateCache(clock);
var obj = new object();
string key1 = "myKey1";
string key2 = "myKey2";
var expirationToken1 = new TestExpirationToken() { ActiveChangeCallbacks = true };
var expirationToken2 = new TestExpirationToken() { ActiveChangeCallbacks = true };
ICacheEntry entry1 = null;
ICacheEntry entry2 = null;
using (entry1 = cache.CreateEntry(key1))
{
entry1.SetValue(obj);
entry1
.AddExpirationToken(expirationToken1)
.SetAbsoluteExpiration(TimeSpan.FromSeconds(10));
using (entry2 = cache.CreateEntry(key2))
{
entry2.SetValue(obj);
entry2
.AddExpirationToken(expirationToken2)
.SetAbsoluteExpiration(TimeSpan.FromSeconds(15));
}
}
Assert.Equal(2, ((CacheEntry)entry1)._expirationTokens.Count());
Assert.NotNull(((CacheEntry)entry1)._absoluteExpiration);
Assert.Equal(clock.UtcNow + TimeSpan.FromSeconds(10), ((CacheEntry)entry1)._absoluteExpiration);
Assert.Single(((CacheEntry)entry2)._expirationTokens);
Assert.NotNull(((CacheEntry)entry2)._absoluteExpiration);
Assert.Equal(clock.UtcNow + TimeSpan.FromSeconds(15), ((CacheEntry)entry2)._absoluteExpiration);
}
[Fact]
public async Task LinkContexts_AreThreadSafe()
{
var cache = CreateCache();
var key1 = new object();
var key2 = new object();
var key3 = new object();
var key4 = new object();
var value1 = Guid.NewGuid();
var value2 = Guid.NewGuid();
var value3 = Guid.NewGuid();
var value4 = Guid.NewGuid();
TestExpirationToken t3 = null;
TestExpirationToken t4 = null;
Func<Task> func = async () =>
{
t3 = new TestExpirationToken() { ActiveChangeCallbacks = true };
t4 = new TestExpirationToken() { ActiveChangeCallbacks = true };
value1 = await cache.GetOrCreateAsync(key1, async e1 =>
{
value2 = await cache.GetOrCreateAsync(key2, async e2 =>
{
await Task.WhenAll(
Task.Run(() =>
{
value3 = cache.Set(key3, Guid.NewGuid(), t3);
}),
Task.Run(() =>
{
value4 = cache.Set(key4, Guid.NewGuid(), t4);
}));
return Guid.NewGuid();
});
return Guid.NewGuid();
});
};
await func();
Assert.NotNull(cache.Get(key1));
Assert.NotNull(cache.Get(key2));
Assert.Equal(value3, cache.Get(key3));
Assert.Equal(value4, cache.Get(key4));
Assert.NotEqual(value3, value4);
t3.Fire();
Assert.Equal(value4, cache.Get(key4));
Assert.Null(cache.Get(key1));
Assert.Null(cache.Get(key2));
Assert.Null(cache.Get(key3));
await func();
Assert.NotNull(cache.Get(key1));
Assert.NotNull(cache.Get(key2));
Assert.Equal(value3, cache.Get(key3));
Assert.Equal(value4, cache.Get(key4));
Assert.NotEqual(value3, value4);
t4.Fire();
Assert.Equal(value3, cache.Get(key3));
Assert.Null(cache.Get(key1));
Assert.Null(cache.Get(key2));
Assert.Null(cache.Get(key4));
}
}
}