是的，您可以使用find.descendant和Element.ancestorWidgetOfExactType.
示例:
// Finds a RichText widget that a descendant (child/grand-child/etc) of a
// tab widget with text "Tab 1"
find.descendant(of: find.text('Tab 1'), matching: find.byType(RichText));
// Finds a parent widget of type MyParentWidget.
tester.element(find.byType(MyChildWidget))
.ancestorWidgetOfExactType(MyParentWidget);