Add small test

tests/test_vector/test_geometric.py

@@ -172,6 +172,7 @@ def test_buffer_without_overlap(self, monkeypatch) -> None:  # type: ignore
         # Output should be of same size as input and same geometry type
         assert len(buffer.ds) == len(two_squares.ds)
         assert np.all(buffer.ds.geometry.geom_type == two_squares.ds.geometry.geom_type)
+        assert buffer.crs == two_squares.crs
 
         # Extract individual geometries
         polys = []