public async Task Endpoint_ZeroEndpoints_ReturnsNull()
{
var subscriber = Substitute.For <IServiceSubscriber>();
subscriber.Endpoints().Returns(Task.FromResult(new List <Endpoint>()));
var lb = new RandomLoadBalancer(subscriber);
var actual = await lb.Endpoint();
Assert.Null(actual);
}
public async Task Endpoint_MultipleEndpoints_ReturnsEndpointInRandomOrder()
{
var expectedList = new List <Endpoint>
{
new Endpoint {
Host = Guid.NewGuid().ToString(), Port = 1
},
new Endpoint {
Host = Guid.NewGuid().ToString(), Port = 2
},
new Endpoint {
Host = Guid.NewGuid().ToString(), Port = 3
}
};
var subscriber = Substitute.For <IServiceSubscriber>();
subscriber.Endpoints().Returns(Task.FromResult(expectedList));
var lb = new RandomLoadBalancer(subscriber, 0);
var actual = new List <Endpoint>();
for (var i = 0; i < 10; i++)
{
actual.Add(await lb.Endpoint());
}
var expectedOrder = new List <int> {
2, 2, 2, 1, 0, 1, 2, 1, 2, 0
};
for (var i = 0; i < actual.Count; i++)
{
Assert.Equal(expectedList[expectedOrder[i]].Host, actual[i].Host);
Assert.Equal(expectedList[expectedOrder[i]].Port, actual[i].Port);
}
}