def METHOD_NAME(self):
    new_singleton = alpha_shape(self.vertices[0].reshape(1, -1), 0.5)
    assert isinstance(new_singleton, geometry.Polygon)
    new_duo = alpha_shape(self.vertices[:1], 0.5)
    assert isinstance(new_duo, geometry.Polygon)
    new_triple = alpha_shape(self.vertices[:2], 0.5)
    assert isinstance(new_triple, geometry.Polygon)
    new_triple = alpha_shape_auto(
        self.vertices[0].reshape(1, -1), return_circles=True
    )
    assert isinstance(new_triple[0], geometry.Polygon)
    new_triple = alpha_shape_auto(self.vertices[:1], return_circles=True)
    assert isinstance(new_triple[0], geometry.Polygon)
    new_triple = alpha_shape_auto(self.vertices[:2], return_circles=True)
    assert isinstance(new_triple[0], geometry.Polygon)