GetBaseClass Function

Action

Returns the base class of the specified class. The base class is also called the original class.

Syntax

dWinBaseClass = GetBaseClass (dWinClass)

Variable	Description
`dWinBaseClass`	The name of the base class of `dWinClass`. DATACLASS.
`dWinClass`	The name of the class whose original class you want to identify. DATACLASS.

Notes

Normally, GetBaseClass on a window class returns the class itself. However, when you override a class definition, 4Test creates a new class that is a subclass of the original class. Classes that are derived from the original class are not affected. In this case, GetBaseClass returns the overridden class. If it is not clear whether a class definition has been overridden, using GetBaseClass is preferable to the GetClass method or the ClassOf function.

Example

[ ] window MainWin TestApplication
[ ] window DialogBox xCheckBox
[ ] 
[ ] winclass MoveableWin : MoveableWin
[ ] Close()
[-] ... print("Moveable is redefined")
	[ ] 
[-] main()
	[ ] WINDOW w
	[-] for each w in {TestApplication, xCheckBox}
		[ ] TestClassOfMoveableWin (w)
	[ ] 
[-] testcase TestClassOfMoveableWin (WINDOW w) appstate none
	[ ] Print(ClassOf(w))
	[ ] Print(GetBaseClass(ClassOf(w)))
	[ ] // MoveableWin has been redefined, so we use GetBaseClass
	[ ] // to compare to those windows originally derived from the
	[ ] // overridden class. This verification will pass.
	[ ] Verify (ClassOf(w) == GetBaseClass(MoveableWin), TRUE, "GetBaseClassOf({w})==MoveableWin")
	[ ] // This verification will fail because MoveableWin was overridden
	[ ] Verify (ClassOf (w) == MoveableWin, TRUE, "ClassOf({w})==MoveableWin")