public void ShouldReceiveDelegateOnDifferentThread()
{
ManualResetEvent completeEvent = new ManualResetEvent(false);
SynchronizationContext.SetSynchronizationContext(new SynchronizationContext());
SynchronizationContext calledSyncContext = null;
Action<object> action = delegate
{
calledSyncContext = SynchronizationContext.Current;
completeEvent.Set();
};
IDelegateReference actionDelegateReference = new MockDelegateReference() { Target = action };
IDelegateReference filterDelegateReference = new MockDelegateReference() { Target = (Predicate<object>)delegate { return true; } };
var eventSubscription = new BackgroundEventSubscription<object>(actionDelegateReference, filterDelegateReference);
var publishAction = eventSubscription.GetExecutionStrategy();
Assert.IsNotNull(publishAction);
publishAction.Invoke(null);
completeEvent.WaitOne(5000);
Assert.AreNotEqual(SynchronizationContext.Current, calledSyncContext);
}
public void ShouldPassParametersCorrectly()
{
IDelegateReference actionDelegateReference = new MockDelegateReference()
{
Target =
(Action<object>)(arg1 =>
{
return;
})
};
IDelegateReference filterDelegateReference = new MockDelegateReference
{
Target = (Predicate<object>)(arg => true)
};
var mockSyncContext = new MockSynchronizationContext();
DispatcherEventSubscription<object> eventSubscription = new DispatcherEventSubscription<object>(actionDelegateReference, filterDelegateReference, mockSyncContext);
var executionStrategy = eventSubscription.GetExecutionStrategy();
Assert.IsNotNull(executionStrategy);
object argument1 = new object();
executionStrategy.Invoke(new[] { argument1 });
Assert.AreSame(argument1, mockSyncContext.InvokeArg);
}
public void NullActionThrows()
{
Assert.ThrowsException<ArgumentNullException>(() =>
{
var filterDelegateReference = new MockDelegateReference()
{
Target = (Predicate<object>)(arg =>
{
return true;
})
};
var eventSubscription = new EventSubscription<object>(null,
filterDelegateReference);
});
}
public void DifferentTargetTypeInActionThrows()
{
Assert.ThrowsException<ArgumentException>(() =>
{
var actionDelegateReference = new MockDelegateReference()
{
Target = (Action<int>)delegate { }
};
var filterDelegateReference = new MockDelegateReference()
{
Target = (Predicate<string>)(arg =>
{
return true;
})
};
var eventSubscription = new EventSubscription<string>(actionDelegateReference,
filterDelegateReference);
});
}
public void ShouldCallInvokeOnDispatcher()
{
DispatcherEventSubscription<object> eventSubscription = null;
IDelegateReference actionDelegateReference = new MockDelegateReference()
{
Target = (Action<object>)(arg =>
{
return;
})
};
IDelegateReference filterDelegateReference = new MockDelegateReference
{
Target = (Predicate<object>)(arg => true)
};
var mockSyncContext = new MockSynchronizationContext();
eventSubscription = new DispatcherEventSubscription<object>(actionDelegateReference, filterDelegateReference, mockSyncContext);
eventSubscription.GetExecutionStrategy().Invoke(new object[0]);
Assert.IsTrue(mockSyncContext.InvokeCalled);
}
public void NullTargetInFilterThrows()
{
Assert.ThrowsException<ArgumentException>(() =>
{
var actionDelegateReference = new MockDelegateReference()
{
Target = (Action<object>)delegate { }
};
var filterDelegateReference = new MockDelegateReference()
{
Target = null
};
var eventSubscription = new EventSubscription<object>(actionDelegateReference,
filterDelegateReference);
});
}
public void StrategyPassesArgumentToDelegates()
{
string passedArgumentToAction = null;
string passedArgumentToFilter = null;
var actionDelegateReference = new MockDelegateReference((Action<string>)(obj => passedArgumentToAction = obj));
var filterDelegateReference = new MockDelegateReference((Predicate<string>)(obj =>
{
passedArgumentToFilter = obj;
return true;
}));
var eventSubscription = new EventSubscription<string>(actionDelegateReference, filterDelegateReference);
var publishAction = eventSubscription.GetExecutionStrategy();
publishAction.Invoke(new[] { "TestString" });
Assert.AreEqual("TestString", passedArgumentToAction);
Assert.AreEqual("TestString", passedArgumentToFilter);
}
public void GetPublishActionDoesNotExecuteActionIfFilterReturnsFalse()
{
bool actionExecuted = false;
var actionDelegateReference = new MockDelegateReference()
{
Target = (Action<int>)delegate { actionExecuted = true; }
};
var filterDelegateReference = new MockDelegateReference((Predicate<int>)delegate
{
return false;
});
var eventSubscription = new EventSubscription<int>(actionDelegateReference, filterDelegateReference);
var publishAction = eventSubscription.GetExecutionStrategy();
publishAction.Invoke(new object[] { null });
Assert.IsFalse(actionExecuted);
}
public void GetPublishActionReturnsNullIfFilterIsNull()
{
var actionDelegateReference = new MockDelegateReference((Action<object>)delegate { });
var filterDelegateReference = new MockDelegateReference((Predicate<object>)delegate { return true; });
var eventSubscription = new EventSubscription<object>(actionDelegateReference, filterDelegateReference);
var publishAction = eventSubscription.GetExecutionStrategy();
Assert.IsNotNull(publishAction);
filterDelegateReference.Target = null;
publishAction = eventSubscription.GetExecutionStrategy();
Assert.IsNull(publishAction);
}
public void GetPublishActionReturnsDelegateThatExecutesTheFilterAndThenTheAction()
{
var executedDelegates = new List<string>();
var actionDelegateReference =
new MockDelegateReference((Action<object>)delegate { executedDelegates.Add("Action"); });
var filterDelegateReference = new MockDelegateReference((Predicate<object>)delegate
{
executedDelegates.Add(
"Filter");
return true;
});
var eventSubscription = new EventSubscription<object>(actionDelegateReference, filterDelegateReference);
var publishAction = eventSubscription.GetExecutionStrategy();
Assert.IsNotNull(publishAction);
publishAction.Invoke(null);
Assert.AreEqual(2, executedDelegates.Count);
Assert.AreEqual("Filter", executedDelegates[0]);
Assert.AreEqual("Action", executedDelegates[1]);
}
public void CanInitEventSubscription()
{
var actionDelegateReference = new MockDelegateReference((Action<object>)delegate { });
var filterDelegateReference = new MockDelegateReference((Predicate<object>)delegate { return true; });
var eventSubscription = new EventSubscription<object>(actionDelegateReference, filterDelegateReference);
var subscriptionToken = new SubscriptionToken(t => { });
eventSubscription.SubscriptionToken = subscriptionToken;
Assert.AreSame(actionDelegateReference.Target, eventSubscription.Action);
Assert.AreSame(filterDelegateReference.Target, eventSubscription.Filter);
Assert.AreSame(subscriptionToken, eventSubscription.SubscriptionToken);
}
