public async Task StartSubscription_InitialCacheSetThrowsException_ExceptionBubblesUp()
{
var fixture = new CacheServiceSubscriberFixture();
fixture.ServiceSubscriber.Endpoints().Returns(Task.FromResult(new List <Endpoint>()));
var expectedException = new Exception();
fixture.Cache.Set(Arg.Any <object>(), Arg.Any <List <Endpoint> >()).Throws(expectedException);
var subscriber = fixture.CreateSut();
Exception actualException = null;
try
{
await subscriber.StartSubscription();
}
catch (Exception ex)
{
actualException = ex;
}
Assert.Same(expectedException, actualException);
}
public async Task SubscriptionLoop_ReceivesSameEndpoints_DoesNotUpdateCacheOrFireEvent()
{
var result = new List <Endpoint>
{
new Endpoint
{
Host = Guid.NewGuid().ToString(),
Port = 123
}
};
var fixture = new CacheServiceSubscriberFixture();
fixture.ServiceSubscriber.Endpoints()
.Returns(Task.FromResult(result));
var eventWasCalled = false;
using (var subscriber = fixture.CreateSut())
{
subscriber.EndpointsChanged += (sender, args) => eventWasCalled = true;
await subscriber.Endpoints();
Thread.Sleep(1000);
fixture.Cache.Received(1).Set(Arg.Any <string>(), Arg.Any <List <Endpoint> >());
Assert.False(eventWasCalled);
}
}
public void Dispose_DisposedTwice_DoesNotRemoveFromCacheTwice()
{
var fixture = new CacheServiceSubscriberFixture();
var subscriber = fixture.CreateSut();
subscriber.Dispose();
subscriber.Dispose();
fixture.Cache.Received(1).Remove(Arg.Any <string>());
}
public async Task Endpoints_PopulatesCacheImmediately()
{
var fixture = new CacheServiceSubscriberFixture();
fixture.ServiceSubscriber.Endpoints().Returns(Task.FromResult(new List <Endpoint>()));
var subscriber = fixture.CreateSut();
await subscriber.Endpoints();
fixture.Cache.Received(1).Set(Arg.Any <object>(), Arg.Any <List <Endpoint> >());
fixture.Cache.Received(1).Get <List <Endpoint> >(Arg.Any <string>());
}
public async Task SubscriptionLoop_ReceivesDifferentCountOfEndpoints_UpdatesCacheAndFiresEvent()
{
var result1 = new List <Endpoint>
{
new Endpoint
{
Host = Guid.NewGuid().ToString(),
Port = 123
}
};
var result2 = new List <Endpoint>
{
new Endpoint
{
Host = Guid.NewGuid().ToString(),
Port = 789
},
new Endpoint
{
Host = Guid.NewGuid().ToString(),
Port = 456
}
};
var fixture = new CacheServiceSubscriberFixture();
fixture.ServiceSubscriber.Endpoints(Arg.Any <CancellationToken>())
.Returns(Task.FromResult(result1), Task.FromResult(result2));
var eventWasCalled = false;
using (var subscriber = fixture.CreateSut())
{
subscriber.EndpointsChanged += (sender, args) => eventWasCalled = true;
await subscriber.StartSubscription();
await subscriber.Endpoints();
Thread.Sleep(1000);
Received.InOrder(() =>
{
fixture.Cache.Set(Arg.Any <string>(), result1);
fixture.Cache.Set(Arg.Any <string>(), result2);
});
fixture.Cache.Received(2).Set(Arg.Any <string>(), Arg.Any <List <Endpoint> >());
Assert.True(eventWasCalled);
}
}
public async Task SubscriptionLoop_WithoutUpdateEvent_UpdatesCacheWithoutFiringEventAndDying()
{
var result1 = new List <Endpoint>
{
new Endpoint
{
Host = Guid.NewGuid().ToString(),
Port = 123
}
};
var result2 = new List <Endpoint>
{
new Endpoint
{
Host = Guid.NewGuid().ToString(),
Port = 789
},
new Endpoint
{
Host = Guid.NewGuid().ToString(),
Port = 456
}
};
var fixture = new CacheServiceSubscriberFixture();
fixture.ServiceSubscriber.Endpoints(Arg.Any <CancellationToken>())
.Returns(Task.FromResult(result1), Task.FromResult(result2));
using (var subscriber = fixture.CreateSut())
{
Thread.Sleep(1000);
await subscriber.Endpoints();
Received.InOrder(() =>
{
fixture.Cache.Set(Arg.Any <string>(), result1);
fixture.Cache.Set(Arg.Any <string>(), result2);
});
fixture.Cache.Received(2).Set(Arg.Any <string>(), Arg.Any <List <Endpoint> >());
}
}
public async Task Endpoints_CalledWhenDisposed_ThrowsDisposedException()
{
var fixture = new CacheServiceSubscriberFixture();
var subscriber = fixture.CreateSut();
subscriber.Dispose();
ObjectDisposedException actualException = null;
try
{
await subscriber.Endpoints();
}
catch (ObjectDisposedException ex)
{
actualException = ex;
}
Assert.IsType <ObjectDisposedException>(actualException);
}
public async Task StartSubscription_InitialServiceCallThrowsException_NothingSetInCacheAndExceptionBubblesUp()
{
var fixture = new CacheServiceSubscriberFixture();
var expectedException = new Exception();
fixture.ServiceSubscriber.Endpoints(Arg.Any <CancellationToken>()).Throws(expectedException);
var subscriber = fixture.CreateSut();
Exception actualException = null;
try
{
await subscriber.StartSubscription();
}
catch (Exception ex)
{
actualException = ex;
}
Assert.Same(expectedException, actualException);
fixture.Cache.DidNotReceive().Set(Arg.Any <object>(), Arg.Any <List <Endpoint> >());
}
