ancestor method

Finder ancestor ({Finder of, Finder matching, bool matchRoot: false })

Finds widgets that are ancestors of the of parameter and that match the matching parameter.

Sample code

// Test if a Text widget that contains 'faded' is the
// descendant of an Opacity widget with opacity 0.5:
expect(
  tester.widget<Opacity>(
    find.ancestor(
      of: find.text('faded'),
      matching: find.byType('Opacity'),
    )
  ).opacity,
  0.5
);

If the matchRoot argument is true then the widget(s) specified by of will be matched along with the ancestors.

Implementation 

Finder ancestor({ Finder of, Finder matching, bool matchRoot = false}) {
  return _AncestorFinder(of, matching, matchRoot: matchRoot);
}