Fix mypy

Author: dstansby

src/zarr/core/array.py

@@ -3989,12 +3989,12 @@ async def init_array(
             chunks_out = chunk_shape_parsed
             codecs_out = sub_codecs
 
-        if order is not None:
-            if config is None:
-                config = {}
-            if "order" not in config:
-                config["order"] = order
+        if config is None:
+            config = {}
+        if order is not None and isinstance(config, dict):
+            config["order"] = config.get("order", order)
 
+        print(config)
         meta = AsyncArray._create_metadata_v3(
             shape=shape_parsed,
             dtype=dtype_parsed,

tests/test_array.py

@@ -1253,7 +1253,7 @@ def test_order(
         Test that the arrays generated by array indexing have a memory order defined by the config order
         value, and that for zarr v2 arrays, the ``order`` field in the array metadata is set correctly.
         """
-        config: ArrayConfigLike = {}
+        config: ArrayConfigLike | None = {}
         if order is None:
             config = {}
             expected = zarr.config.get("array.order")
@@ -1275,6 +1275,7 @@ def test_order(
         )
         assert arr.order == expected
         if zarr_format == 2:
+            assert arr.metadata.zarr_format == 2
             assert arr.metadata.order == expected
 
         vals = np.asarray(arr)