Add test for label properties

ome_zarr/data.py

@@ -155,11 +155,14 @@ def create_zarr(
         write_multiscale(labels, label_grp)
 
         colors = []
+        properties = []
         for x in range(1, 9):
             rgba = [randrange(0, 256) for i in range(4)]
             colors.append({"label-value": x, "rgba": rgba})
+            properties.append({"label-value": x, "class": f"class {x}"})
         label_grp.attrs["image-label"] = {
             "version": "0.1",
             "colors": colors,
+            "properties": properties,
             "source": {"image": "../../"},
         }

tests/test_napari.py

@@ -13,7 +13,7 @@ def initdir(self, tmpdir):
         self.path = tmpdir.mkdir("data")
         create_zarr(str(self.path), astronaut, "astronaut")
 
-    def assert_layers(self, layers, visible_1, visible_2):
+    def assert_layers(self, layers, visible_1, visible_2, label_props=None):
         # TODO: check name
 
         assert len(layers) == 2
@@ -27,6 +27,8 @@ def assert_layers(self, layers, visible_1, visible_2):
 
         data, metadata, layer_type = self.assert_layer(label)
         assert visible_2 == metadata["visible"]
+        if label_props:
+            assert label_props == metadata["properties"]
 
     def assert_layer(self, layer_data):
         data, metadata, layer_type = layer_data
@@ -47,7 +49,11 @@ def test_labels(self):
     def test_label(self):
         filename = str(self.path.join("labels", "astronaut"))
         layers = napari_get_reader(filename)()
-        self.assert_layers(layers, False, True)
+        properties = {
+            "index": [i for i in range(1, 9)],
+            "class": [f"class {i}" for i in range(1, 9)],
+        }
+        self.assert_layers(layers, False, True, properties)
 
     @pytest.mark.skipif(
         not sys.platform.startswith("darwin") or sys.version_info < (3, 7),