public void ShouldLetTwoConcurrentGetCallsWaitForFirstGetterFunctionRun()
{
then();
var getterFunctionRuns = 0;
var cache = new IndividualisticCache<int, TestEntity>(i => i.Id, (id) =>
{
getterFunctionRuns++;
Thread.Sleep(10 * 1000);
return new TestEntity { Id = 2 };
});
var t1 = Task.Run(() =>
cache.Get(2)
);
var t2 = Task.Run(() =>
{
Thread.Sleep(5 * 1000);
return cache.Get(2);
});
Task.WaitAll(t1, t2);
now();
Assert.AreEqual(1, getterFunctionRuns, "Getter function should only have run once");
Assert.IsTrue(nowTime > thenTime.AddSeconds(10), "Only " + (nowTime - thenTime).Seconds + " seconds had elapsed, GetterFunction alone should've taken 10 seconds");
Assert.IsNotNull(t1.Result);
Assert.IsNotNull(t2.Result);
}
public void ShouldLetTwoConcurrentGetCallsWaitForFirstGetterFunctionRun()
{
then();
var getterFunctionRuns = 0;
var cache = new IndividualisticCache <int, TestEntity>(i => i.Id, (id) =>
{
getterFunctionRuns++;
Thread.Sleep(10 * 1000);
return(new TestEntity {
Id = 2
});
});
var t1 = Task.Run(() =>
cache.Get(2)
);
var t2 = Task.Run(() =>
{
Thread.Sleep(5 * 1000);
return(cache.Get(2));
});
Task.WaitAll(t1, t2);
now();
Assert.AreEqual(1, getterFunctionRuns, "Getter function should only have run once");
Assert.IsTrue(nowTime > thenTime.AddSeconds(10), "Only " + (nowTime - thenTime).Seconds + " seconds had elapsed, GetterFunction alone should've taken 10 seconds");
Assert.IsNotNull(t1.Result);
Assert.IsNotNull(t2.Result);
}
public void ShouldWaitForBlockingGetMethod()
{
then();
var cache = new IndividualisticCache <int, TestEntity>(
(entity) => entity.Id,
(id) =>
{
Thread.Sleep(5000);
if (id == 2)
{
return(new TestEntity {
Id = 2, Name = "Bjorn"
});
}
if (id == 4)
{
return(new TestEntity {
Id = 4, Name = "Ali"
});
}
if (id == 6)
{
return(new TestEntity {
Id = 6, Name = "Hamdi"
});
}
throw new Exception("No such id");
},
TimeSpan.FromSeconds(10)
);
var x = cache.Get(2);
now();
Assert.IsTrue(nowTime > thenTime.AddSeconds(5), "Only " + (nowTime - thenTime).Seconds + " seconds had elapsed, GetterFunction alone should've taken 5 seconds");
then();
var y = cache.Get(2);
now();
Assert.IsFalse(nowTime > thenTime.AddSeconds(5), (nowTime - thenTime).Seconds + " seconds had elapsed, should've been immediate");
}
public void ShouldRefreshAsynchronously()
{
var numberOfGets = 0;
var cache = new IndividualisticCache <int, TestEntity>(
(entity) => entity.Id,
(id) =>
{
numberOfGets++;
if (numberOfGets == 1)
{
return(new TestEntity {
Id = 2, Name = "Ali"
});
}
if (numberOfGets == 2)
{
return(new TestEntity {
Id = 2, Name = "Bjorn Ali"
});
}
throw new Exception("No such id");
},
TimeSpan.FromSeconds(2)
);
var a = cache.Get(2);
Assert.AreEqual("Ali", a.Name);
Thread.Sleep(3 * 1000);
var b = cache.Get(2);
Assert.AreEqual("Bjorn Ali", b.Name);
}
public void ShouldFollowMaximumConcurrentCallsToGetterFunction()
{
var getterFunctionRuns = 0;
var cacheA = new IndividualisticCache<int, object>(
idFunction: i => -1,
getterFunction: (id) =>
{
getterFunctionRuns++;
Thread.Sleep(1 * 1000);
return new object();
},
getterFunctionWaitPeriod: TimeSpan.FromSeconds(10),
maximumConcurrentCallsToGetterFunction: 2
);
var i1 = Task.Run(() => cacheA.Get(1));
var i2 = Task.Run(() => cacheA.Get(2));
var i3 = Task.Run(() => cacheA.Get(3));
Thread.Sleep(1 * 1000); // now all getter functions should be completed
Thread.Sleep((int)(0.1 * 1000)); // (error margin)
Assert.IsTrue(i1.IsCompleted, "Instance 1 should have completed by now");
Assert.IsTrue(i2.IsCompleted, "Instance 2 should have completed by now");
Assert.IsTrue(i3.IsCompleted, "Instance 3 should have completed by now");
Thread.Sleep(10 * 1000); // now getterFunctionWaitPeriod is over; 3 getter functions should be queued and 2 getter functions should run (since maximumConcurrentCallsToGetterFunction is 2)
Thread.Sleep(1 * 1000); // now 1 last getter function should run
Thread.Sleep(1 * 1000); // now last one should be done
Assert.AreEqual(6, getterFunctionRuns, "3 + 2 + 1 getter functions should have run");
}
public void ShouldFollowMaximumConcurrentCallsToGetterFunction()
{
var getterFunctionRuns = 0;
var cacheA = new IndividualisticCache <int, object>(
idFunction: i => - 1,
getterFunction: (id) =>
{
getterFunctionRuns++;
Thread.Sleep(1 * 1000);
return(new object());
},
getterFunctionWaitPeriod: TimeSpan.FromSeconds(10),
maximumConcurrentCallsToGetterFunction: 2
);
var i1 = Task.Run(() => cacheA.Get(1));
var i2 = Task.Run(() => cacheA.Get(2));
var i3 = Task.Run(() => cacheA.Get(3));
Thread.Sleep(1 * 1000); // now all getter functions should be completed
Thread.Sleep((int)(0.1 * 1000)); // (error margin)
Assert.IsTrue(i1.IsCompleted, "Instance 1 should have completed by now");
Assert.IsTrue(i2.IsCompleted, "Instance 2 should have completed by now");
Assert.IsTrue(i3.IsCompleted, "Instance 3 should have completed by now");
Thread.Sleep(10 * 1000); // now getterFunctionWaitPeriod is over; 3 getter functions should be queued and 2 getter functions should run (since maximumConcurrentCallsToGetterFunction is 2)
Thread.Sleep(1 * 1000); // now 1 last getter function should run
Thread.Sleep(1 * 1000); // now last one should be done
Assert.AreEqual(6, getterFunctionRuns, "3 + 2 + 1 getter functions should have run");
}
public void ShouldWaitForBlockingGetMethod()
{
then();
var cache = new IndividualisticCache<int, TestEntity>(
(entity) => entity.Id,
(id) =>
{
Thread.Sleep(5000);
if (id == 2)
{
return new TestEntity { Id = 2, Name = "Bjorn" };
}
if (id == 4)
{
return new TestEntity { Id = 4, Name = "Ali" };
}
if (id == 6)
{
return new TestEntity { Id = 6, Name = "Hamdi" };
}
throw new Exception("No such id");
},
TimeSpan.FromSeconds(10)
);
var x = cache.Get(2);
now();
Assert.IsTrue(nowTime > thenTime.AddSeconds(5), "Only " + (nowTime - thenTime).Seconds + " seconds had elapsed, GetterFunction alone should've taken 5 seconds");
then();
var y = cache.Get(2);
now();
Assert.IsFalse(nowTime > thenTime.AddSeconds(5), (nowTime - thenTime).Seconds + " seconds had elapsed, should've been immediate");
}
public void ShouldRefreshAsynchronously()
{
var numberOfGets = 0;
var cache = new IndividualisticCache<int, TestEntity>(
(entity) => entity.Id,
(id) =>
{
numberOfGets++;
if (numberOfGets == 1)
{
return new TestEntity { Id = 2, Name = "Ali" };
}
if (numberOfGets == 2)
{
return new TestEntity { Id = 2, Name = "Bjorn Ali" };
}
throw new Exception("No such id");
},
TimeSpan.FromSeconds(2)
);
var a = cache.Get(2);
Assert.AreEqual("Ali", a.Name);
Thread.Sleep(3 * 1000);
var b = cache.Get(2);
Assert.AreEqual("Bjorn Ali", b.Name);
}