fixes for passing tests

Author: d-v-b

src/zarr/api/synchronous.py

@@ -754,7 +754,7 @@ def create_array(
     data: np.ndarray[Any, np.dtype[Any]] | None = None,
     chunks: ChunkCoords | Literal["auto"] = "auto",
     shards: ShardsLike | None = None,
-    filters: Iterable[FilterLike] | None | Literal["auto"] = "auto",
+    filters: FilterLike | Iterable[FilterLike] | None | Literal["auto"] = "auto",
     compressors: CompressorLike | Iterable[CompressorLike] | None | Literal["auto"] = "auto",
     serializer: SerializerLike | Literal["auto"] = "auto",
     fill_value: Any | None = DEFAULT_FILL_VALUE,

src/zarr/core/array.py

@@ -4338,7 +4338,7 @@ async def create_array(
     chunks: ChunkCoords | Literal["auto"] = "auto",
     shards: ShardsLike | None = None,
     filters: FilterLike | Iterable[FilterLike] | None | Literal["auto"] = "auto",
-    compressors: Iterable[CompressorLike] | CompressorLike | None | Literal["auto"] = "auto",
+    compressors: CompressorLike | Iterable[CompressorLike] | None | Literal["auto"] = "auto",
     serializer: SerializerLike | Literal["auto"] = "auto",
     fill_value: Any | None = DEFAULT_FILL_VALUE,
     order: MemoryOrder | None = None,
@@ -4870,6 +4870,9 @@ def _parse_deprecated_compressor(
             compressors = ()
         else:
             compressors = (compressor,)
+    # TODO: remove this, because we should be setting the default deeper in the stack
+    elif zarr_format == 2 and compressor == compressors == "auto":
+        compressors = ({"id": "blosc"},)
     return compressors
 
 

src/zarr/core/metadata/v2.py

@@ -275,10 +275,10 @@ def parse_filters(data: object) -> tuple[Numcodec, ...] | None:
         for val in data:
             if _is_numcodec(val):
                 out.append(val)
-            if _check_codecjson_v2(val):
+            elif _check_codecjson_v2(val):
                 out.append(get_numcodec(val))
             else:
-                msg = f'Invalid representation of Numcodec. Got {data}, expected a dict with an "id" key or a Numcodec instance.'
+                msg = f'Invalid representation of a Zarr V2 codec. Got {data}, expected a dict with an "id" key or a Numcodec instance.'
                 raise TypeError(msg)
         if len(out) == 0:
             # Per the v2 spec, an empty tuple is not allowed -- use None to express "no filters"