avoid masked array vs raw array mismatch in to_dask_array tests

tests/test_io.py

@@ -95,6 +95,7 @@ def test_json_bytes_no_delim_defined(ndjson_points_file: str) -> None:
 
 
 def test_to_and_from_dask_array(daa: dak.Array) -> None:
+ daa = dak.from_awkward(daa.compute(), npartitions=3)
  computed = ak.flatten(daa.points.x.compute())
  x = dak.flatten(daa.points.x)
  daskarr = dak.to_dask_array(x)
@@ -273,6 +274,8 @@ def test_from_lists(caa_p1: ak.Array) -> None:
 def test_to_dask_array(daa: dak.Array, caa: dak.Array) -> None:
  from dask.array.utils import assert_eq as da_assert_eq
 
+ daa = dak.from_awkward(daa.compute(), npartitions=4)
+
  da = dak.to_dask_array(dak.flatten(daa.points.x))
  ca = ak.to_numpy(ak.flatten(caa.points.x))
  da_assert_eq(da, ca)