def test_set_target(self):
old_target = Text('hi')
viewport = Viewport(old_target, width=100, height=100)
new_target = Text('bye')
viewport.target = new_target
self.assertIs(new_target, viewport.target)
self.assertIs(viewport, new_target.parent)
self.assertIsNone(old_target.parent)
def test_set_target(self):
old_target = Text('hi')
viewport = Viewport(old_target, width=100, height=100)
new_target = Text('bye')
viewport.target = new_target
self.assertIs(new_target, viewport.target)
self.assertIs(viewport, new_target.parent)
self.assertIsNone(old_target.parent)
def test_set_target__marks_dirty(self):
viewport = Viewport(Text('hi'), width=100, height=100)
with self.assertMarksDirty(viewport):
viewport.target = Text('bye')
def test_set_target__marks_dirty(self):
viewport = Viewport(Text('hi'), width=100, height=100)
with self.assertMarksDirty(viewport):
viewport.target = Text('bye')