Move code coverage skips to branches

Co-authored-by: jakirkham <[email protected]>

Author: dstansby

numcodecs/checksum32.py

@@ -9,8 +9,8 @@
 from .compat import ensure_contiguous_ndarray, ndarray_copy
 from .jenkins import jenkins_lookup3
 
-if TYPE_CHECKING:
-    from typing_extensions import Buffer  # pragma: no cover
+if TYPE_CHECKING:  # pragma: no cover
+    from typing_extensions import Buffer
 
 CHECKSUM_LOCATION = Literal['start', 'end']
 

numcodecs/tests/test_zarr3.py

@@ -5,9 +5,10 @@
 import numpy as np
 import pytest
 
-if not TYPE_CHECKING:
-    zarr = pytest.importorskip("zarr")
+if TYPE_CHECKING:  # pragma: no cover
+    import zarr
 else:
+    zarr = pytest.importorskip("zarr")
     import zarr  # pragma: no cover
 
 import zarr.storage