Function test_to_backend

dask/array/tests/test_array_core.py:6051–6063

()

def test_to_backend():
    # Test that `Array.to_backend` works as expected
    with dask.config.set({"array.backend": "numpy"}):
        # Start with numpy-backed array
        x = da.ones(10)
        assert isinstance(x._meta, np.ndarray)

        # Default `to_backend` shouldn't change data
        assert_eq(x, x.to_backend())

        # Moving to a "missing" backend should raise an error
        with pytest.raises(ValueError, match="No backend dispatch registered"):
            x.to_backend("missing")


def test_from_array_copies():