Add test to verify order of consolidated metadata

Author: lkluft

tests/test_metadata/test_consolidated.py

@@ -467,6 +467,35 @@ def test_to_dict_empty(self):
         }
         assert result == expected
 
+    @pytest.mark.parametrize("zarr_format", [2, 3])
+    async def test_to_dict_order(
+        self, memory_store: zarr.storage.MemoryStore, zarr_format: ZarrFormat
+    ) -> None:
+        with zarr.config.set(default_zarr_format=zarr_format):
+            g = await group(store=memory_store)
+
+            # Create groups in non-lexicographix order
+            dtype = "float32"
+            await g.create_array(name="b", shape=(1,), dtype=dtype)
+            child = await g.create_group("c", attributes={"key": "child"})
+            await g.create_array(name="a", shape=(1,), dtype=dtype)
+
+            await child.create_array("e", shape=(1,), dtype=dtype)
+            await child.create_array("d", shape=(1,), dtype=dtype)
+
+            # Consolidate metadata and re-open store
+            await zarr.api.asynchronous.consolidate_metadata(memory_store)
+            g2 = await zarr.api.asynchronous.open_group(store=memory_store)
+
+            assert list(g2.metadata.consolidated_metadata.metadata) == ["a", "b", "c"]
+            assert list(g2.metadata.consolidated_metadata.flattened_metadata) == [
+                "a",
+                "b",
+                "c",
+                "c/d",
+                "c/e",
+            ]
+
     @pytest.mark.parametrize("zarr_format", [2, 3])
     async def test_open_consolidated_raises_async(self, zarr_format: ZarrFormat):
         store = zarr.storage.MemoryStore()