Fix failures in data-apis#267

Author: crusaderky

src/array_api_extra/_lib/_testing.py

@@ -5,6 +5,8 @@
 See also ..testing for public testing utilities.
 """
 
+from __future__ import annotations
+
 import math
 from types import ModuleType
 from typing import Any, cast

tests/test_funcs.py

@@ -196,7 +196,6 @@ def test_device(self, xp: ModuleType, device: Device):
         y = apply_where(x % 2 == 0, x, self.f1, fill_value=x)
         assert get_device(y) == device
 
-    @pytest.mark.xfail_xp_backend(Backend.SPARSE, reason="no isdtype")
     @pytest.mark.filterwarnings("ignore::RuntimeWarning")  # overflows, etc.
     @hypothesis.settings(
         # The xp and library fixtures are not regenerated between hypothesis iterations