Class ArrayWithoutBroadcastTo

xarray/tests/test_variable.py:1670–1683

    def test_set_dims_without_broadcast(self):
        class ArrayWithoutBroadcastTo(NDArrayMixin, indexing.ExplicitlyIndexed):
            def __init__(self, array):
                self.array = array

            # Broadcasting with __getitem__ is "easier" to implement
            # especially for dims of 1
            def __getitem__(self, key):
                return self.array[key]

            def __array_function__(self, *args, **kwargs):
                raise NotImplementedError(
                    "Not we don't want to use broadcast_to here "
                    "https://github.com/pydata/xarray/issues/9462"
                )

        arr = ArrayWithoutBroadcastTo(np.zeros((3, 4)))
        # We should be able to add a new axis without broadcasting