public async Task A_valid_subscriber_is_assigned_as_a_handler_for_its_message_type()
{
var dispatcher = Substitute.For <IDispatcher>();
var handlerStub = Substitute.For <IHandleAsync <object> >();
var eventAggregator = new MessageAggregator();
Assert.False(eventAggregator.HandlerExistsFor(typeof(object)));
await eventAggregator.SubscribeAsync(handlerStub);
Assert.True(eventAggregator.HandlerExistsFor(typeof(object)));
}
public async Task A_valid_subscriber_gets_removed_from_the_handler_list()
{
var dispatcher = Substitute.For <IDispatcher>();
var handlerStub = Substitute.For <IHandleAsync <object> >();
var eventAggregator = new MessageAggregator();
await eventAggregator.SubscribeAsync(handlerStub);
Assert.True(eventAggregator.HandlerExistsFor(typeof(object)));
await eventAggregator.UnsubscribeAsync(handlerStub);
Assert.False(eventAggregator.HandlerExistsFor(typeof(object)));
}
public async Task False_returned_when_no_handlers_exist_for_a_given_message()
{
var dispatcher = Substitute.For <IDispatcher>();
var handlerStub = Substitute.For <IHandle <object> >();
var eventAggregator = new MessageAggregator();
Assert.False(eventAggregator.HandlerExistsFor(typeof(object)));
}
public async Task True_returned_when_a_handler_exists_for_a_given_message()
{
var dispatcher = Substitute.For <IDispatcher>();
var handlerStub = Substitute.For <IHandle <object> >();
var eventAggregator = new MessageAggregator();
await eventAggregator.SubscribeAsync(handlerStub);
Assert.True(eventAggregator.HandlerExistsFor(typeof(object)));
}
