Function test_eval_dask_comparison

xarray/tests/test_eval.py:556–571

Test that comparison operations preserve dask backing.

()

@requires_dask
def test_eval_dask_comparison() -> None:
    """Test that comparison operations preserve dask backing."""
    from xarray.core.utils import is_duck_dask_array

    ds = Dataset(
        {"a": ("x", np.arange(10.0)), "b": ("x", np.arange(10.0)[::-1])}
    ).chunk({"x": 5})

    with raise_if_dask_computes():
        result = ds.eval("a > b")

    assert is_duck_dask_array(result.data)

    # Verify correctness
    expected = ds["a"] > ds["b"]
    assert_equal(result, expected)


@requires_dask