Fixed path segment duplication in open_array (#2167)

Closes #2166

Author: TomAugspurger

Diff for: src/zarr/api/asynchronous.py

@@ -897,7 +897,6 @@ async def open_array(
         if store_path.store.mode.create:
             return await create(
                 store=store_path,
-                path=path,
                 zarr_format=zarr_format,
                 overwrite=store_path.store.mode.overwrite,
                 **kwargs,

Diff for: src/zarr/testing/store.py

@@ -2,6 +2,7 @@
 
 import pytest
 
+import zarr.api.asynchronous
 from zarr.abc.store import AccessMode, Store
 from zarr.core.buffer import Buffer, default_buffer_prototype
 from zarr.store._utils import _normalize_interval_index
@@ -232,3 +233,14 @@ async def test_list_dir(self, store: S) -> None:
         keys_observed = [k async for k in store.list_dir("group-0/group-1")]
         assert len(keys_expected) == len(keys_observed), keys_observed
         assert set(keys_observed) == set(keys_expected), keys_observed
+
+    async def test_set_get(self, store_kwargs: dict[str, Any]) -> None:
+        kwargs = {**store_kwargs, **{"mode": "w"}}
+        store = self.store_cls(**kwargs)
+        await zarr.api.asynchronous.open_array(store=store, path="a", mode="w", shape=(4,))
+        keys = [x async for x in store.list()]
+        assert keys == ["a/zarr.json"]
+
+        # no errors
+        await zarr.api.asynchronous.open_array(store=store, path="a", mode="r")
+        await zarr.api.asynchronous.open_array(store=store, path="a", mode="a")