public void When_Multiple_Subscribers_OnFirst_Once()
{
var onFirstCounter = 0;
var wrapper = new StartStopEventWrapper <EventHandler <EventArgs> >(() => onFirstCounter++, () => { });
Assert.AreEqual(0, onFirstCounter);
wrapper.AddHandler((s, e) => { });
wrapper.AddHandler((s, e) => { });
Assert.AreEqual(1, onFirstCounter);
}
public void When_Multiple_Invoked()
{
var firstInvoked = false;
var secondInvoked = false;
var wrapper = new StartStopEventWrapper <EventHandler <EventArgs> >(() => { }, () => { });
wrapper.AddHandler((s, e) => firstInvoked = true);
wrapper.AddHandler((s, e) => secondInvoked = true);
Assert.IsFalse(firstInvoked);
Assert.IsFalse(secondInvoked);
wrapper.Event?.Invoke(null, EventArgs.Empty);
Assert.IsTrue(firstInvoked);
Assert.IsTrue(secondInvoked);
}
public void When_Add_Handler_Event_Not_Null()
{
var wrapper = new StartStopEventWrapper <TypedEventHandler <Accelerometer, AccelerometerReadingChangedEventArgs> >(() => { }, () => { });
wrapper.AddHandler((s, e) => { });
Assert.IsNotNull(wrapper.Event);
}
public void When_First_Subscriber_OnFirst_Invoked()
{
var onFirst = false;
var wrapper = new StartStopEventWrapper <EventHandler <EventArgs> >(() => onFirst = true, () => { });
Assert.IsFalse(onFirst);
wrapper.AddHandler((s, e) => { });
Assert.IsTrue(onFirst);
}
public void When_Single_Invoked()
{
var invoked = false;
var wrapper = new StartStopEventWrapper <EventHandler <EventArgs> >(() => { }, () => { });
wrapper.AddHandler((s, e) => invoked = true);
Assert.IsFalse(invoked);
wrapper.Event?.Invoke(null, EventArgs.Empty);
Assert.IsTrue(invoked);
}
public void When_Multiple_Subscribers_OnLast_Once()
{
void FirstSubscriber(object sender, EventArgs e)
{
}
void SecondSubscriber(object sender, EventArgs e)
{
}
var onLastCounter = 0;
var wrapper = new StartStopEventWrapper <EventHandler <EventArgs> >(() => { }, () => onLastCounter++);
wrapper.AddHandler(FirstSubscriber);
wrapper.AddHandler(SecondSubscriber);
Assert.AreEqual(0, onLastCounter);
wrapper.RemoveHandler(FirstSubscriber);
wrapper.RemoveHandler(SecondSubscriber);
Assert.AreEqual(1, onLastCounter);
}
public void When_Multiple_First_Removed_Invoked()
{
var firstInvoked = false;
void FirstHandler(object sender, EventArgs args)
{
firstInvoked = true;
}
var secondInvoked = false;
var wrapper = new StartStopEventWrapper <EventHandler <EventArgs> >(() => { }, () => { });
wrapper.AddHandler(FirstHandler);
wrapper.AddHandler((s, e) => secondInvoked = true);
Assert.IsFalse(firstInvoked);
Assert.IsFalse(secondInvoked);
wrapper.RemoveHandler(FirstHandler);
wrapper.Event?.Invoke(null, EventArgs.Empty);
Assert.IsFalse(firstInvoked);
Assert.IsTrue(secondInvoked);
}
public void When_Add_Remove_Event_Null()
{
void Handler(Accelerometer a, AccelerometerReadingChangedEventArgs e)
{
}
var wrapper = new StartStopEventWrapper <TypedEventHandler <Accelerometer, AccelerometerReadingChangedEventArgs> >(() => { }, () => { });
wrapper.AddHandler(Handler);
wrapper.RemoveHandler(Handler);
Assert.IsNull(wrapper.Event);
}
public void When_First_Subscriber_OnLast_Invoked()
{
void FirstSubscriber(object sender, EventArgs e)
{
}
var onLast = false;
var wrapper = new StartStopEventWrapper <EventHandler <EventArgs> >(() => { }, () => onLast = true);
wrapper.AddHandler(FirstSubscriber);
Assert.IsFalse(onLast);
wrapper.RemoveHandler(FirstSubscriber);
Assert.IsTrue(onLast);
}