Add test, restore coord attrs for the most_common method

Author: BSchilperoort

src/xarray_regrid/methods/most_common.py

@@ -151,6 +151,8 @@ def most_common(data: xr.Dataset, target_ds: xr.Dataset, time_dim: str) -> xr.Da
     """
     dim_order = data.dims
     coords = utils.common_coords(data, target_ds, remove_coord=time_dim)
+    coord_attrs = {coord: data[coord].attrs for coord in target_ds.coords}
+
     bounds = tuple(
         _construct_intervals(target_ds[coord].to_numpy()) for coord in coords
     )
@@ -185,6 +187,7 @@ def most_common(data: xr.Dataset, target_ds: xr.Dataset, time_dim: str) -> xr.Da
     ds_regrid = ds_regrid.rename({f"{coord}_bins": coord for coord in coords})
     for coord in coords:
         ds_regrid[coord] = target_ds[coord]
+        ds_regrid[coord].attrs = coord_attrs[coord]
 
     return ds_regrid.transpose(*dim_order)
 

tests/test_most_common.py

@@ -85,6 +85,7 @@ def test_attrs_dataarray(dummy_lc_data, dummy_target_grid):
     da_regrid = dummy_lc_data["lc"].regrid.most_common(dummy_target_grid)
     assert da_regrid.attrs != {}
     assert da_regrid.attrs == dummy_lc_data["lc"].attrs
+    assert da_regrid["longitude"].attrs == dummy_lc_data["longitude"].attrs
 
 
 def test_attrs_dataset(dummy_lc_data, dummy_target_grid):
@@ -93,3 +94,4 @@ def test_attrs_dataset(dummy_lc_data, dummy_target_grid):
     )
     assert ds_regrid.attrs != {}
     assert ds_regrid.attrs == dummy_lc_data.attrs
+    assert ds_regrid["longitude"].attrs == dummy_lc_data["longitude"].attrs