add testing

pyproject.toml

@@ -160,7 +160,10 @@ pretty = true
 [tool.pytest.ini_options]
 minversion = "7.0"
 testpaths = ["tests"]
-filterwarnings = ["error"]
+filterwarnings = [
+    "error",
+    "ignore::FutureWarning", # TODO remove after zarr-python v3 
+]
 addopts = [
     "-vv",
     "--color=yes",

src/ngio/core/ngff_image.py

@@ -361,7 +361,7 @@ def derive_new_image(
         new_image = NgffImage(store=store)
 
         if copy_tables:
-            # TODO: to be refactored when the label location is changed in the spec
+            # TODO: to be refactored when the table location is changed in the spec
             source_tables_group = self.tables._table_group
 
             if source_tables_group is None:

tests/core/test_ngff_image.py

@@ -38,3 +38,22 @@ def test_ngff_image(self, ome_zarr_image_v04_path: Path) -> None:
         )
 
         new_ngff_image.update_omero_window(start_percentile=1.1, end_percentile=98.9)
+
+    def test_ngff_image_derive(self, ome_zarr_image_v04_path: Path) -> None:
+        from ngio.core.ngff_image import NgffImage
+
+        ngff_image = NgffImage(ome_zarr_image_v04_path)
+
+        for name, table_type in [("test_roi", "roi_table")]:
+            table = ngff_image.tables.new(name=name, table_type=table_type)
+            table.consolidate()
+
+        ngff_image.labels.derive("test_label")
+
+        new_path = ome_zarr_image_v04_path.parent / "new_ngff_image.zarr"
+        new_ngff_image = ngff_image.derive_new_image(
+            new_path, "new_image", overwrite=True, copy_labels=True, copy_tables=True
+        )
+
+        assert ngff_image.tables.list() == new_ngff_image.tables.list()
+        assert ngff_image.labels.list() == new_ngff_image.labels.list()