public void ChangingAndChangedBothFireInitially()
{
LifeCycleButton button = new LifeCycleButton();
bool changing = false;
bool changed = false;
button.ParentChanging += (_, __) => changing = true;
button.ParentChanged += (_, __) =>
{
if (!changing)
{
Assert.Fail("Attached fired before changing");
}
changed = true;
};
Assert.AreEqual(0, button.changing);
Assert.AreEqual(0, button.changed);
Assert.IsFalse(changing);
Assert.IsFalse(changed);
button.Parent = new Button();
Assert.IsTrue(changing);
Assert.IsTrue(changed);
Assert.AreEqual(1, button.changing);
Assert.AreEqual(1, button.changed);
}
public void ChangingArgsAreSetCorrectly()
{
LifeCycleButton button = new LifeCycleButton();
Assert.IsNull(button.Parent);
var firstParent = new Button();
button.Parent = firstParent;
Assert.AreEqual(button.LastParentChangingEventArgs.NewParent, firstParent);
Assert.IsNull(button.LastParentChangingEventArgs.OldParent);
var secondParent = new Button();
button.Parent = secondParent;
Assert.AreEqual(button.LastParentChangingEventArgs.OldParent, firstParent);
Assert.AreEqual(button.LastParentChangingEventArgs.NewParent, secondParent);
button.Parent = null;
Assert.AreEqual(button.LastParentChangingEventArgs.OldParent, secondParent);
Assert.AreEqual(button.LastParentChangingEventArgs.NewParent, null);
Assert.AreEqual(3, button.changing);
Assert.AreEqual(3, button.changed);
}
public void ChangingAndChangedBothFireForParentOverride()
{
LifeCycleButton button = new LifeCycleButton();
bool changing = false;
bool changed = false;
button.Parent = new Button();
button.ParentChanging += (_, __) => changing = true;
button.ParentChanged += (_, __) =>
{
if (!changing)
{
Assert.Fail("Attached fired before changing");
}
changed = true;
};
Assert.IsFalse(changing);
Assert.IsFalse(changed);
button.ParentOverride = new Button();
Assert.IsTrue(changing);
Assert.IsTrue(changed);
}
public void ChangingArgsAreSetCorrectly()
{
LifeCycleButton button = new LifeCycleButton();
Assert.IsNull(button.Handler);
var firstHandler = new HandlerStub();
button.Handler = firstHandler;
Assert.AreEqual(button.LastHandlerChangingEventArgs.NewHandler, firstHandler);
Assert.IsNull(button.LastHandlerChangingEventArgs.OldHandler);
var secondHandler = new HandlerStub();
button.Handler = secondHandler;
Assert.AreEqual(button.LastHandlerChangingEventArgs.OldHandler, firstHandler);
Assert.AreEqual(button.LastHandlerChangingEventArgs.NewHandler, secondHandler);
button.Handler = null;
Assert.AreEqual(button.LastHandlerChangingEventArgs.OldHandler, secondHandler);
Assert.AreEqual(button.LastHandlerChangingEventArgs.NewHandler, null);
Assert.AreEqual(3, button.changing);
Assert.AreEqual(3, button.changed);
}
public void BasicAttachMethods()
{
LifeCycleButton button = new LifeCycleButton();
button.Handler = new HandlerStub();
Assert.AreEqual(1, button.attaching);
Assert.AreEqual(1, button.attached);
}
public void BasicDetachMethods(Type handlerType)
{
LifeCycleButton button = new LifeCycleButton();
button.Handler = new HandlerStub();
Assert.Zero(button.detaching);
Assert.Zero(button.detached);
if (handlerType != null)
{
button.Handler = (IViewHandler)Activator.CreateInstance(handlerType);
}
else
{
button.Handler = null;
}
Assert.AreEqual(1, button.detached);
Assert.AreEqual(1, button.detaching);
}
public void ParentOverrideChangingArgsSendCorrectly()
{
LifeCycleButton button = new LifeCycleButton();
Assert.IsNull(button.Parent);
var firstParent = new Button();
button.Parent = firstParent;
Assert.AreEqual(button.LastParentChangingEventArgs.NewParent, firstParent);
Assert.IsNull(button.LastParentChangingEventArgs.OldParent);
var secondParent = new Button();
button.ParentOverride = secondParent;
Assert.AreEqual(button.LastParentChangingEventArgs.OldParent, firstParent);
Assert.AreEqual(button.LastParentChangingEventArgs.NewParent, secondParent);
button.ParentOverride = null;
Assert.AreEqual(button.LastParentChangingEventArgs.OldParent, secondParent);
Assert.AreEqual(button.LastParentChangingEventArgs.NewParent, firstParent);
}
