'Masking is True if any input is masked'

def test_mask_true_if_any_input_masked(self):

    t = Table([self.ca, self.a])
    assert (t.masked is True)
    t = Table([self.ca])
    assert (t.masked is False)
    t = Table([self.ca, ma.array([1, 2, 3])])
    assert (t.masked is True)
