fix broken tests that used invalid codec JSON

Author: d-v-b

tests/test_array.py

@@ -1105,8 +1105,8 @@ def test_dtype_roundtrip(
             (ZstdCodec(level=3),),
             (ZstdCodec(level=3), GzipCodec(level=0)),
             ZstdCodec(level=3),
-            {"name": "zstd", "configuration": {"level": 3}},
-            ({"name": "zstd", "configuration": {"level": 3}},),
+            {"name": "zstd", "configuration": {"level": 3, "checksum": True}},
+            ({"name": "zstd", "configuration": {"level": 3, "checksum": True}},),
         ],
     )
     @pytest.mark.parametrize(

tests/test_config.py

@@ -180,7 +180,7 @@ async def _encode_single(self, chunk_bytes: Buffer, chunk_spec: ArraySpec) -> Bu
             chunks=(10,),
             zarr_format=3,
             dtype="i4",
-            compressors=[{"name": "blosc", "configuration": {}}],
+            compressors=[{"name": "blosc", "configuration": {"cname": "lz4", "clevel": 1, "shuffle": "noshuffle", "blocksize": 1, "typesize": 1}},],
         )
         arr[:] = range(100)
         _mock.call.assert_called()

tests/test_group.py

@@ -16,6 +16,7 @@
 import zarr
 import zarr.api.asynchronous
 import zarr.api.synchronous
+from zarr.core.array import default_compressor_v2, default_compressors_v3, default_serializer_v3
 import zarr.storage
 from zarr import Array, AsyncArray, AsyncGroup, Group
 from zarr.abc.store import Store
@@ -523,7 +524,7 @@ def test_group_child_iterators(store: Store, zarr_format: ZarrFormat, consolidat
                     "chunks": (1,),
                     "order": "C",
                     "filters": None,
-                    "compressor": Blosc(),
+                    "compressor":  default_compressor_v2(dtype).to_json(zarr_format=zarr_format),
                     "zarr_format": zarr_format,
                 },
                 "subgroup": {
@@ -550,8 +551,11 @@ def test_group_child_iterators(store: Store, zarr_format: ZarrFormat, consolidat
                         "name": "default",
                     },
                     "codecs": (
-                        {"configuration": {"endian": "little"}, "name": "bytes"},
-                        {"configuration": {}, "name": "zstd"},
+                        default_serializer_v3(dtype).to_json(zarr_format=zarr_format),
+                        *[
+                            c.to_json(zarr_format=zarr_format)
+                            for c in default_compressors_v3(dtype)
+                        ],
                     ),
                     "data_type": unpack_dtype_json(dtype.to_json(zarr_format=zarr_format)),
                     "fill_value": fill_value,