def test_should_work_with_changed_data(self):
# Given
pa = self._make_2d_grid()
ip = Interpolator([pa], num_points=1000, domain_manager=self._domain)
p = ip.interpolate('p')
# When.
pa.p *= 2.0
ip.update()
p = ip.interpolate('p')
# Then.
expect = np.sin(ip.x * np.pi) * 2.0
np.testing.assert_allclose(p, expect, rtol=5e-2)
