Add test for config warning in init_array

Author: dstansby

tests/test_api.py

@@ -7,6 +7,8 @@
 
 import zarr.codecs
 import zarr.storage
+from zarr.core.array import init_array
+from zarr.storage._common import StorePath
 
 if TYPE_CHECKING:
     import pathlib
@@ -390,6 +392,20 @@ def test_array_order(
         assert arr.metadata.order == expected_order
 
 
+async def test_init_order_warns() -> None:
+    with pytest.warns(
+        RuntimeWarning, match="The `order` keyword argument has no effect for Zarr format 3 arrays"
+    ):
+        await init_array(
+            store_path=StorePath(store=MemoryStore()),
+            shape=(1,),
+            dtype="uint8",
+            config=None,
+            zarr_format=3,
+            order="F",
+        )
+
+
 # def test_lazy_loader():
 #     foo = np.arange(100)
 #     bar = np.arange(100, 0, -1)