Add cffi to test env, and add skip as appropriate

Author: gmarkall

ci/test_conda.sh

@@ -22,6 +22,7 @@ rapids-mamba-retry create -n test \
     make \
     psutil \
     pytest \
+    cffi \
     python=${RAPIDS_PY_VERSION}
 
 # Temporarily allow unbound variables for conda activation.

ci/test_wheel.sh

@@ -7,6 +7,7 @@ rapids-logger "Install testing dependencies"
 # TODO: Replace with rapids-dependency-file-generator
 python -m pip install \
     psutil \
+    cffi \
     cuda-python \
     nvidia-cuda-cccl-cu12 \
     pytest

numba_cuda/numba/cuda/tests/cudapy/test_device_func.py

@@ -3,8 +3,8 @@
 
 import numpy as np
 
-from numba.cuda.testing import (skip_on_cudasim, test_data_dir, unittest,
-                                CUDATestCase)
+from numba.cuda.testing import (skip_on_cudasim, skip_unless_cffi,
+                                test_data_dir, unittest, CUDATestCase)
 from numba import cuda, jit, float32, int32, types
 from numba.core.errors import TypingError
 from types import ModuleType
@@ -297,6 +297,7 @@ def test_link_multiple_sources_tuple(self):
     def test_link_multiple_sources_list(self):
         self._test_link_multiple_sources(list)
 
+    @skip_unless_cffi
     def test_link_sources_in_memory_and_on_disk(self):
         jitlink_cu = str(test_data_dir / "jitlink.cu")
         link = [jitlink_cu, jitlink_user_cu]