ci: improve test

apps/hiopy/tests/check_hierarchy.py

@@ -20,6 +20,10 @@ def check_interpolation(source_var, target_var):
     assert np.allclose(sum([source_var[..., i::4] for i in range(4)]) / 4, target_var)
 
 
+def check_metadata(var):
+    assert "hiopy::copy_metadata" not in var.attrs
+
+
 def _collect_groups(dataset, parent=None):
     if "crs" in dataset.array_keys():
         yield dataset, parent
@@ -37,6 +41,7 @@ def main():
             for name, item in g.arrays():
                 if {"cell", "time"} <= set(item.attrs["_ARRAY_DIMENSIONS"]):
                     check_interpolation(parent[name], item)
+                    check_metadata(item)
 
 
 if __name__ == "__main__":