private async Task RegisterSubscription(
GraphQLFieldSelection fieldSelection,
GraphQLSubscriptionType type,
GraphQLDocument document,
FieldScope scope)
{
var fieldInfo = type.GetFieldInfo(fieldSelection.Name.Value) as GraphQLSubscriptionTypeFieldInfo;
Expression <Func <object, bool> > filter = null;
if (fieldInfo.Filter != null)
{
filter = entity => (bool)scope.InvokeWithArgumentsSync(
fieldSelection.Arguments.ToList(), fieldInfo.Filter, entity);
}
await type.EventBus.Subscribe(EventBusSubscription.Create(
fieldInfo.Channel,
this.clientId,
this.subscriptionId.Value,
this.Operation?.Name?.Value ?? "Anonymous",
this.variables,
filter,
this.ast));
}
public async Task ShouldReceiveDataDefinedBySubscription()
{
await this.eventBus.Subscribe(EventBusSubscription.Create <Message>(
"testChannel",
"someClientId",
0,
null,
new { },
e => e.Author == "Bob",
operation));
OnMessageReceivedEventArgs eventArgs = null;
this.eventBus.OnMessageReceived += async(OnMessageReceivedEventArgs args) =>
{
await Task.Yield();
eventArgs = args;
};
await this.eventBus.Publish(new Message()
{
Author = "Bob", Content = "stuff"
}, "testChannel");
Assert.AreEqual("testChannel", eventArgs.Channel);
}
public async Task DoesntSendDataWhenNoSubscriptionMatchesTheFilter()
{
await this.eventBus.Subscribe(EventBusSubscription.Create <Message>(
"testChannel",
"someClientId",
0,
null,
new { },
e => e.Author == "Sam",
operation));
OnMessageReceivedEventArgs eventArgs = null;
this.eventBus.OnMessageReceived += async(OnMessageReceivedEventArgs args) =>
{
await Task.Yield();
eventArgs = args;
};
await this.eventBus.Publish(new Message()
{
Author = "Bob", Content = "stuff"
}, "testChannel");
Assert.IsNull(eventArgs);
}
public async Task IgnoresMultipleSameSubscriptions()
{
await this.eventBus.Subscribe(EventBusSubscription.Create <Message>(
"testChannel",
"someClientId",
0,
null,
new { },
e => e.Author == "Sam",
operation));
await this.eventBus.Subscribe(EventBusSubscription.Create <Message>(
"testChannel",
"someClientId",
0,
null,
new { },
e => e.Author == "Sam",
operation));
List <string> clientIds = new List <string>();
this.eventBus.OnMessageReceived += async(OnMessageReceivedEventArgs args) =>
{
await Task.Yield();
clientIds.Add(args.ClientId);
};
await this.eventBus.Publish(new Message()
{
Author = "Sam", Content = "stuff"
}, "testChannel");
Assert.AreEqual(1, clientIds.Count);
}
