[testing] _onedal_cpu/gpu_supported design test (#1636)

* Update test_patching.py

* Update test_patching.py

* Update test_patching.py

* Update test_patching.py

* Update test_patching.py

* Update test_patching.py

Author: icfaust

sklearnex/tests/test_patching.py

@@ -14,6 +14,7 @@
 # limitations under the License.
 # ==============================================================================
 
+import inspect
 import os
 import pathlib
 import re
@@ -122,3 +123,14 @@ def test_is_patched_instance(estimator):
     unpatched = UNPATCHED_MODELS[estimator]
     assert is_patched_instance(patched), f"{patched} is a patched instance"
     assert not is_patched_instance(unpatched), f"{unpatched} is an unpatched instance"
+
+
+@pytest.mark.parametrize("member", ["_onedal_cpu_supported", "_onedal_gpu_supported"])
+@pytest.mark.parametrize(
+    "name",
+    [i for i in PATCHED_MODELS.keys() if "sklearnex" in PATCHED_MODELS[i].__module__],
+)
+def test_onedal_supported_member(name, member):
+    patched = PATCHED_MODELS[name]
+    sig = str(inspect.signature(getattr(patched, member)))
+    assert "(self, method_name, *data)" == sig