private static void LSP()
{
WriteHeading("LSP");
WidgetBase widget = new NotLspWidget();
WidgetBase[] widgetRelatives = widget.Relatives();
try
{
//try to put some other WidgetBase to the array
widgetRelatives[0] = new LspWidget();
}
catch (ArrayTypeMismatchException)
{
Console.WriteLine("ArrayTypeMismatchException handled");
}
WidgetBase w = new LspWidget();
WidgetBase[] relatives = w.Relatives();
//try to put some other WidgetBase to the array
relatives[0] = new NotLspWidget();
}
public void LspCovariance_Works()
{
WidgetBase w = new LspWidget();
WidgetBase[] relatives = w.Relatives();
//try to put some other WidgetBase to the array
relatives[0] = new NotLspWidget();
Assert.IsTrue(true);
}
public void LspCovariance_ThrowException()
{
WidgetBase w = new NotLspWidget();
WidgetBase[] relatives = w.Relatives();
//try to put some other WidgetBase to the array
relatives[0] = new LspWidget();
Assert.Fail("ArrayTypeMismatchException exception should have been thrown");
}