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refactoring service discovery and load balancing approach into load balancing middleware

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TomPallister
2017-02-01 22:00:01 +00:00
parent 24dbb958e3 92f492f0ad
commit 2aa156d0a6
54 changed files with 1160 additions and 547 deletions
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68
test/Ocelot.UnitTests/LoadBalancer/RoundRobinTests.cs Normal file
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using System.Collections.Generic;
using System.Diagnostics;
using Ocelot.LoadBalancer.LoadBalancers;
using Ocelot.Responses;
using Ocelot.Values;
using Shouldly;
using TestStack.BDDfy;
using Xunit;
namespace Ocelot.UnitTests.LoadBalancer
{
public class RoundRobinTests
{
private readonly RoundRobinLoadBalancer _roundRobin;
private readonly List<Service> _services;
private Response<HostAndPort> _hostAndPort;
public RoundRobinTests()
{
_services = new List<Service>
{
new Service("product", new HostAndPort("127.0.0.1", 5000)),
new Service("product", new HostAndPort("127.0.0.1", 5001)),
new Service("product", new HostAndPort("127.0.0.1", 5001))
};
_roundRobin = new RoundRobinLoadBalancer(_services);
}
[Fact]
public void should_get_next_address()
{
this.Given(x => x.GivenIGetTheNextAddress())
.Then(x => x.ThenTheNextAddressIndexIs(0))
.Given(x => x.GivenIGetTheNextAddress())
.Then(x => x.ThenTheNextAddressIndexIs(1))
.Given(x => x.GivenIGetTheNextAddress())
.Then(x => x.ThenTheNextAddressIndexIs(2))
.BDDfy();
}
[Fact]
public void should_go_back_to_first_address_after_finished_last()
{
var stopWatch = Stopwatch.StartNew();
while (stopWatch.ElapsedMilliseconds < 1000)
{
var address = _roundRobin.Lease();
address.Data.ShouldBe(_services[0].HostAndPort);
address = _roundRobin.Lease();
address.Data.ShouldBe(_services[1].HostAndPort);
address = _roundRobin.Lease();
address.Data.ShouldBe(_services[2].HostAndPort);
}
}
private void GivenIGetTheNextAddress()
{
_hostAndPort = _roundRobin.Lease();
}
private void ThenTheNextAddressIndexIs(int index)
{
_hostAndPort.Data.ShouldBe(_services[index].HostAndPort);
}
}
}