public void AbsoluteExpirationExpiresInBackground()
{
var clock = new TestClock();
var cache = CreateCache(clock);
var key = "myKey";
var value = new object();
var callbackInvoked = new ManualResetEvent(false);
var options = new MemoryCacheEntryOptions()
.SetAbsoluteExpiration(clock.UtcNow + TimeSpan.FromMinutes(1))
.RegisterPostEvictionCallback((subkey, subValue, reason, state) =>
{
// TODO: Verify params
var localCallbackInvoked = (ManualResetEvent)state;
localCallbackInvoked.Set();
}, callbackInvoked);
var result = cache.Set(key, value, options);
Assert.Same(value, result);
var found = cache.TryGetValue(key, out result);
Assert.True(found);
Assert.Same(value, result);
clock.Add(TimeSpan.FromMinutes(2));
var ignored = cache.Get("otherKey"); // Background expiration checks are triggered by misc cache activity.
Assert.True(callbackInvoked.WaitOne(TimeSpan.FromSeconds(30)), "Callback");
found = cache.TryGetValue(key, out result);
Assert.False(found);
Assert.Null(result);
}
public void AbsoluteExpirationInThePastThrows()
{
var clock = new TestClock();
var cache = CreateCache(clock);
var key = "myKey";
var obj = new object();
var expected = clock.UtcNow - TimeSpan.FromMinutes(1);
ExceptionAssert.ThrowsArgumentOutOfRange(() =>
{
var result = cache.Set(key, obj, new MemoryCacheEntryOptions().SetAbsoluteExpiration(expected));
},
nameof(MemoryCacheEntryOptions.AbsoluteExpiration),
"The absolute expiration value must be in the future.",
expected.ToString(CultureInfo.CurrentCulture));
}
public void AbsoluteExpirationExpires()
{
var clock = new TestClock();
var cache = CreateCache(clock);
var key = "myKey";
var value = new object();
var result = cache.Set(key, value, new MemoryCacheEntryOptions()
.SetAbsoluteExpiration(clock.UtcNow + TimeSpan.FromMinutes(1)));
Assert.Same(value, result);
var found = cache.TryGetValue(key, out result);
Assert.True(found);
Assert.Same(value, result);
clock.Add(TimeSpan.FromMinutes(2));
found = cache.TryGetValue(key, out result);
Assert.False(found);
Assert.Null(result);
}
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 link = cache.CreateLinkingScope())
{
cache.Set(key, obj, new MemoryCacheEntryOptions().SetAbsoluteExpiration(TimeSpan.FromSeconds(5)));
cache.Set(key1, obj, new MemoryCacheEntryOptions().AddEntryLink(link));
}
Assert.Same(obj, cache.Get(key));
Assert.Same(obj, cache.Get(key1));
clock.Add(TimeSpan.FromSeconds(10));
object value;
Assert.False(cache.TryGetValue(key1, out value));
Assert.False(cache.TryGetValue(key, out value));
}
public void NestedLinkContextsCanAggregate()
{
var clock = new TestClock();
var cache = CreateCache(clock);
var obj = new object();
string key2 = "myKey2";
string key3 = "myKey3";
var expirationToken2 = new TestExpirationToken() { ActiveChangeCallbacks = true };
var expirationToken3 = new TestExpirationToken() { ActiveChangeCallbacks = true };
IEntryLink link1 = null;
IEntryLink link2 = null;
using (link1 = cache.CreateLinkingScope())
{
cache.Set(key2, obj, new MemoryCacheEntryOptions()
.AddExpirationToken(expirationToken2)
.SetAbsoluteExpiration(TimeSpan.FromSeconds(10)));
using (link2 = cache.CreateLinkingScope())
{
cache.Set(key3, obj, new MemoryCacheEntryOptions()
.AddExpirationToken(expirationToken3)
.SetAbsoluteExpiration(TimeSpan.FromSeconds(15)));
}
}
Assert.Equal(1, link1.ExpirationTokens.Count());
Assert.NotNull(link1.AbsoluteExpiration);
Assert.Equal(clock.UtcNow + TimeSpan.FromSeconds(10), link1.AbsoluteExpiration);
Assert.Equal(1, link2.ExpirationTokens.Count());
Assert.NotNull(link2.AbsoluteExpiration);
Assert.Equal(clock.UtcNow + TimeSpan.FromSeconds(15), link2.AbsoluteExpiration);
}
public void SlidingExpirationRenewedByAccessUntilAbsoluteExpiration()
{
var clock = new TestClock();
var cache = CreateCache(clock);
var key = "myKey";
var value = new object();
var result = cache.Set(key, value, new MemoryCacheEntryOptions()
.SetSlidingExpiration(TimeSpan.FromMinutes(1))
.SetAbsoluteExpiration(TimeSpan.FromMinutes(2)));
Assert.Same(value, result);
var found = cache.TryGetValue(key, out result);
Assert.True(found);
Assert.Same(value, result);
for (int i = 0; i < 7; i++)
{
clock.Add(TimeSpan.FromSeconds(15));
found = cache.TryGetValue(key, out result);
Assert.True(found);
Assert.Same(value, result);
}
clock.Add(TimeSpan.FromSeconds(15));
found = cache.TryGetValue(key, out result);
Assert.False(found);
Assert.Null(result);
}
public void ZeroSlidingExpirationThrows()
{
var clock = new TestClock();
var cache = CreateCache(clock);
var key = "myKey";
var value = new object();
ExceptionAssert.ThrowsArgumentOutOfRange(() =>
{
var result = cache.Set(key, value, new MemoryCacheEntryOptions()
.SetSlidingExpiration(TimeSpan.Zero));
},
nameof(MemoryCacheEntryOptions.SlidingExpiration),
"The sliding expiration value must be positive.",
TimeSpan.Zero);
}
public void NegativeRelativeExpirationThrows()
{
var clock = new TestClock();
var cache = CreateCache(clock);
var key = "myKey";
var value = new object();
ExceptionAssert.ThrowsArgumentOutOfRange(() =>
{
var result = cache.Set(key, value, new MemoryCacheEntryOptions()
.SetAbsoluteExpiration(TimeSpan.FromMinutes(-1)));
},
nameof(MemoryCacheEntryOptions.AbsoluteExpirationRelativeToNow),
"The relative expiration value must be positive.",
TimeSpan.FromMinutes(-1));
}
public async Task RefreshesSession_WhenSessionData_IsNotModified()
{
var clock = new TestClock();
using (var server = TestServer.Create(app =>
{
app.UseSession();
app.Run(context =>
{
string responseData = string.Empty;
if (context.Request.Path == new PathString("/AddDataToSession"))
{
context.Session.SetInt32("Key", 10);
responseData = "added data to session";
}
else if (context.Request.Path == new PathString("/AccessSessionData"))
{
var value = context.Session.GetInt32("Key");
responseData = (value == null) ? "No value found in session." : value.ToString();
}
else if (context.Request.Path == new PathString("/DoNotAccessSessionData"))
{
responseData = "did not access session data";
}
return context.Response.WriteAsync(responseData);
});
},
services =>
{
services.AddInstance(typeof(ILoggerFactory), new NullLoggerFactory());
services.AddCaching();
services.AddSession(o => o.IdleTimeout = TimeSpan.FromMinutes(20));
services.Configure<MemoryCacheOptions>(o => o.Clock = clock);
}))
{
var client = server.CreateClient();
var response = await client.GetAsync("AddDataToSession");
response.EnsureSuccessStatusCode();
client = server.CreateClient();
var cookie = SetCookieHeaderValue.ParseList(response.Headers.GetValues("Set-Cookie").ToList()).First();
client.DefaultRequestHeaders.Add(
"Cookie", new CookieHeaderValue(cookie.Name, cookie.Value).ToString());
for (var i = 0; i < 5; i++)
{
clock.Add(TimeSpan.FromMinutes(10));
await client.GetStringAsync("/DoNotAccessSessionData");
}
var data = await client.GetStringAsync("/AccessSessionData");
Assert.Equal("10", data);
}
}
public void ExpiredLazyTokenRemovesItemInBackground()
{
var clock = new TestClock();
var cache = CreateCache(clock);
string key = "myKey";
var value = new object();
var callbackInvoked = new ManualResetEvent(false);
var expirationToken = new TestExpirationToken() { ActiveChangeCallbacks = false };
cache.Set(key, value, new MemoryCacheEntryOptions()
.AddExpirationToken(expirationToken)
.RegisterPostEvictionCallback((subkey, subValue, reason, state) =>
{
// TODO: Verify params
var localCallbackInvoked = (ManualResetEvent)state;
localCallbackInvoked.Set();
}, state: callbackInvoked));
var found = cache.TryGetValue(key, out value);
Assert.True(found);
clock.Add(TimeSpan.FromMinutes(2));
expirationToken.HasChanged = true;
var ignored = cache.Get("otherKey"); // Background expiration checks are triggered by misc cache activity.
Assert.True(callbackInvoked.WaitOne(TimeSpan.FromSeconds(30)), "Callback");
found = cache.TryGetValue(key, out value);
Assert.False(found);
}
