filter All-NaN slice and divide warnings from dask blocks.

Author: Nirkan

xrspatial/tests/test_zonal.py

@@ -447,7 +447,8 @@ def test_default_stats_dataarray(
     assert_input_data_unmodified(data_zones, copied_data_zones)
     assert_input_data_unmodified(data_values_2d, copied_data_values_2d)
 
-
+@pytest.mark.filterwarnings("ignore:All-NaN slice encountered:RuntimeWarning")
+@pytest.mark.filterwarnings("ignore:invalid value encountered in divide:RuntimeWarning")
 @pytest.mark.parametrize("backend", ['numpy', 'dask+numpy', 'cupy'])
 def test_zone_ids_stats(backend, data_zones, data_values_2d, result_zone_ids_stats,
                         result_zone_ids_stats_no_majority):