public void ReturnsBasedOnRequests()
{
var balancer = new UpdateableAdaptiveLoadBalancer <Scoreable>(s => (int)(s.PercentMemoryUsec * 100));
balancer.Resources.Add(new Scoreable(new Uri("http://base.one"))
{
PercentMemoryUsec = .25
});
balancer.Resources.Add(new Scoreable(new Uri("http://base.two"))
{
PercentMemoryUsec = .25
});
balancer.Resources.Add(new Scoreable(new Uri("http://base.three"))
{
PercentMemoryUsec = .5
});
var item = balancer.GetResource();
item.Uri.Should().Be(new Uri("http://base.one"));
item = balancer.GetResource();
item.Uri.Should().Be(new Uri("http://base.two"));
item = balancer.GetResource();
item.Uri.Should().Be(new Uri("http://base.one"));
balancer.Update(item);
balancer.GetResource().Should().BeSameAs(item);
}
public void ReturnsBasedOnScoringFunction()
{
var balancer = new UpdateableAdaptiveLoadBalancer <Scoreable>(s => (int)(s.PercentMemoryUsec * 100),
new List <Scoreable>
{
new Scoreable(new Uri("http://base.one"))
{
PercentMemoryUsec = .25
},
new Scoreable(new Uri("http://base.two"))
{
PercentMemoryUsec = .75
},
new Scoreable(new Uri("http://base.three"))
{
PercentMemoryUsec = .5
}
});
var item = balancer.GetResource();
item.Uri.Should().Be(new Uri("http://base.one"));
item.PercentMemoryUsec = .8;
item = balancer.GetResource();
item.Uri.Should().Be(new Uri("http://base.three"));
balancer.GetResource().Should().BeSameAs(item);
}
public void OnlyItemReturnedEveryTime()
{
var balancer = new UpdateableAdaptiveLoadBalancer <Scoreable>(s => (int)(s.PercentMemoryUsec * 100));
balancer.Resources.Add(new Scoreable(new Uri("http://only.one"))
{
PercentMemoryUsec = .75
});
var sameAsFirst = balancer.GetResource();
sameAsFirst.Should().NotBeNull();
foreach (var _ in Enumerable.Range(1, 100))
{
balancer.GetResource().Should().Be(sameAsFirst);
}
}
public void NothingReturnedWhenNoEntries()
{
var balancer = new UpdateableAdaptiveLoadBalancer <Scoreable>(s => (int)(s.PercentMemoryUsec * 100));
balancer.GetResource().Should().BeNull();
}