Fixing again the issue of the empty coords on reindex with pad method

pyproject.toml

@@ -2,7 +2,7 @@
 
 [project]
 name = "tensordb"
-version = "0.32.3"
+version = "0.32.4"
 description = "Database based in a file system storage combined with Xarray and Zarr"
 keywords = ["Database Files Xarray Handler Zarr Store Read Write Append Update Upsert Backup Delete S3"]
 readme = "README.md"

src/tensordb/algorithms.py

@@ -867,6 +867,7 @@ def reindex_with_pad(
                 "The bfill method is not implemented for the moment"
             )
 
+        is_coord_empty = False
         reindex_data = data.copy()
         reindex_mapped_pad_coords = {}
         reindex_mapped_coords = {}
@@ -880,6 +881,7 @@ def reindex_with_pad(
             if pad_width <= 0:
                 continue
             data_coord = data.coords[dim].to_numpy()
+            is_coord_empty |= len(data_coord) == 0
             total_coord = np.union1d(np.array(coord), data_coord)
 
             auto_map = {c: i for i, c in enumerate(total_coord)}
@@ -896,7 +898,7 @@ def reindex_with_pad(
             inv_autoincrement_map[dim] = {v: k for k, v in auto_map.items()}
             pad_widths[dim] = (0, pad_width)
 
-        if not reindex_mapped_pad_coords:
+        if not reindex_mapped_pad_coords or is_coord_empty:
             data = data.reindex(coords, fill_value=fill_value, method=method)
             if apply_chunk:
                 data = data.chunk(preferred_chunks)

tests/test_algorithms.py

@@ -530,7 +530,7 @@ def test_rolling_overlap(window, apply_ffill):
 )
 @pytest.mark.parametrize(
     "slices",
-    [{"a": [0, 3, 4], "b": [1, 3]}, {}, {"a": [0, 1], "b": [0]}],
+    [{"a": [0, 3, 4], "b": [1, 3]}, {}, {"a": [0, 1], "b": [0]}, {"a": [1], "b": []}],
 )
 @pytest.mark.parametrize(
     "coords",