def test_zero_2d_dat(self, backend, y):
        """Zero a vector-valued Dat."""
        y.data[:] = 10
        assert (y.data == 10).all()
        y.zero()
        assert (y.data == 0).all()
dataset/ETHPy150Open OP2/PyOP2/test/unit/test_direct_loop.py/TestDirectLoop.test_zero_2d_dat/original