public void Handler_ContextShouldNot_BeChanged()
{
//Arrange
var handler = new Handler();
var context = new Context()
{
Data = 0
};
//Act
//Assert
handler.Subscribe <ContextfulEvent, Context>((ctx) => {
Assert.AreEqual(ctx.Data, 0);
ctx.Data += 1;
});
handler.Subscribe <ContextfulEvent, Context>((ctx) => {
Assert.AreEqual(ctx.Data, 0);
ctx.Data += 1;
});
handler.Subscribe <ContextfulEvent, Context>((ctx) => {
Assert.AreEqual(ctx.Data, 0);
ctx.Data += 1;
});
handler.Dispatch <ContextfulEvent, Context>(context);
Assert.AreEqual(context.Data, 0);
}
public void Handler_ShouldThrowException_WhenSubscribedTwice()
{
//Arrange
var handler = new Handler();
var subscription = new ContextlessSubscription();
handler.Subscribe(subscription);
//Act
//Assert
Assert.ThrowsException <ArgumentException>(() => handler.Subscribe(subscription));
}
public void Handler_ShouldThrow_WhenSubscribing_IfSubscriptionIsNull()
{
//Arrange
var handler = new Handler();
ISubscription <ContextlessEvent> subscription = null;
//Act
//Assert
Assert.ThrowsException <ArgumentException>(() => handler.Subscribe(subscription));
}
public void Handler_ShouldThrowException_WhenUnsubscribing_WhenSubscriptionIsNull()
{
//Arrange
var handler = new Handler();
ContextfulSubscription subscription = null;
//Act
//Assert
Assert.ThrowsException <ArgumentException>(() => handler.Subscribe(subscription));
}
public void Handler_ShouldNotify_AllSubscriptions()
{
//Arrange
var subscriptionsHandled = 0;
var handler = new Handler();
handler.Subscribe <ContextlessEvent>(() => {
subscriptionsHandled++;
});
handler.Subscribe <ContextlessEvent>(() => {
subscriptionsHandled++;
});
handler.Subscribe <ContextlessEvent>(() => {
subscriptionsHandled++;
});
//Act
handler.Dispatch <ContextlessEvent>();
//Assert
Assert.AreEqual(subscriptionsHandled, 3);
}
public void Handler_ShouldNotify_ContexlessSubscribe()
{
//Arrange
var handler = new Handler();
var subscriptionMock = new Mock <ContextlessSubscription>();
subscriptionMock.Setup(m => m.Handle());
handler.Subscribe(subscriptionMock.Object);
//Act
handler.Dispatch <ContextlessEvent>();
//Assert
subscriptionMock.Verify(x => x.Handle(), Times.Once());
}
public void Handler_ShouldThrow_WhenSubscriptionForDualEvent_IsNotImplementedProperly()
{
//Arrange
var handler = new Handler();
var context = new DualContext();
var subs = new InvalidDualSubscription();
handler.Subscribe(subs);
//Act
handler.Dispatch <DualEvent, DualContext>(context);
//Assert
Assert.ThrowsException <InvalidOperationException>(() => handler.Dispatch <DualEvent>());
}
public void Handler_ShouldNotify_ContexlessLambda()
{
//Arrange
var subscriptionCalled = false;
var handler = new Handler();
handler.Subscribe <ContextlessEvent>(() => {
subscriptionCalled = true;
});
//Act
handler.Dispatch <ContextlessEvent>();
//Assert
Assert.IsTrue(subscriptionCalled);
}
public void Handler_ShouldDispatchAll_WhenSubscriptionForDualEvent_IsImplementedProperly()
{
//Arrange
var subscriptionsHandled = 0;
var handler = new Handler();
var context = new DualContext();
var subs = new ValidDualSubscription(() => subscriptionsHandled++);
handler.Subscribe <DualEvent>(subs);
//Act
handler.Dispatch <DualEvent, DualContext>(context);
handler.Dispatch <DualEvent>();
//Assert
Assert.AreEqual(2, subscriptionsHandled);
}
public void Handler_ShouldNotNotify_WhenSubscriptionRemoved()
{
//Arrange
var subscriptionCalled = false;
var handler = new Handler();
var subscription = handler.Subscribe <ContextlessEvent>(() => {
subscriptionCalled = true;
});
handler.Unsubscribe(subscription);
//Act
handler.Dispatch <ContextlessEvent>();
//Assert
Assert.IsFalse(subscriptionCalled);
}
public void Handler_ShouldNotify_ContexfulSubscribe()
{
//Arrange
var handler = new Handler();
var subscriptionMock = new Mock <ContextfulSubscription>();
var context = new Context()
{
Data = 42
};
subscriptionMock.Setup(m => m.Handle(It.IsAny <Context>()));
handler.Subscribe(subscriptionMock.Object);
//Act
handler.Dispatch <ContextfulEvent, Context>(context);
//Assert
subscriptionMock.Verify(x => x.Handle(context), Times.Once());
}
public void Handler_ShouldNotify_ContexfulLambda()
{
//Arrange
var subscriptionCalled = false;
var handler = new Handler();
var context = new Context()
{
Data = 42
};
handler.Subscribe <ContextfulEvent, Context>((ctx) => {
subscriptionCalled = true;
});
//Act
handler.Dispatch <ContextfulEvent, Context>(context);
//Assert
Assert.IsTrue(subscriptionCalled);
}
public void Handler_ShouldNotThrow_WhenSubscriptionForDualEvent_IsImplementedProperly()
{
//Arrange
var timesDispatched = 0;
var handler = new Handler();
var context = new DualContext();
var subs = new ValidDualSubscription(() => { timesDispatched++; });
handler.Subscribe <DualEvent>(subs);
//Act
//Assert
try
{
handler.Dispatch <DualEvent, DualContext>(context);
handler.Dispatch <DualEvent>();
}
catch (Exception e)
{
Assert.Fail($"Expected no exception, but got {e.Message}");
}
Assert.AreEqual(timesDispatched, 2);
}