tests

numcodecs/_zarr3.py

@@ -1,13 +1,14 @@
 from __future__ import annotations
 
 import asyncio
+import math
 from dataclasses import dataclass, replace
 from functools import cached_property
-import math
-from typing_extensions import Self
 from warnings import warn
 
 import numpy as np
+from typing_extensions import Self
+
 import numcodecs
 
 try:
@@ -18,18 +19,17 @@
 except ImportError:
     raise ImportError("zarr 3.0.0 or later is required to use the numcodecs zarr integration.")
 
-from zarr.abc.codec import ArrayArrayCodec, BytesBytesCodec, ArrayBytesCodec
-from zarr.core.buffer import NDBuffer, Buffer, BufferPrototype
-from zarr.core.buffer.cpu import as_numpy_array_wrapper
+from zarr.abc.codec import ArrayArrayCodec, ArrayBytesCodec, BytesBytesCodec
 from zarr.core.array_spec import ArraySpec
+from zarr.core.buffer import Buffer, BufferPrototype, NDBuffer
+from zarr.core.buffer.cpu import as_numpy_array_wrapper
 from zarr.core.common import (
     JSON,
     parse_named_configuration,
     product,
 )
 from zarr.core.metadata import ArrayMetadata
 
-
 CODEC_PREFIX = "numcodecs."
 
 

numcodecs/tests/test_zarr3_import.py

@@ -1,13 +1,17 @@
 from __future__ import annotations
+
 import pytest
 
 
 def test_zarr3_import():
+    ERROR_MESSAGE_MATCH = "zarr 3.0.0 or later.*"
+
     try:
         import zarr
-    except ImportError:
-        pass
 
-    if zarr is None or zarr.__version__ < "3.0.0":
-        with pytest.raises(ImportError):
+        if zarr.__version__ < "3.0.0":
+            with pytest.raises(ImportError, match=ERROR_MESSAGE_MATCH):
+                import numcodecs._zarr3  # noqa: F401
+    except ImportError:
+        with pytest.raises(ImportError, match=ERROR_MESSAGE_MATCH):
             import numcodecs._zarr3  # noqa: F401

pyproject.toml

@@ -132,7 +132,7 @@ doctest_optionflags = [
     "IGNORE_EXCEPTION_DETAIL",
 ]
 testpaths = [
-    "numcodecs",
+    "numcodecs/tests",
 ]
 norecursedirs = [
     ".git",