Sanity check special case params and stubs

Author: honno

array_api_tests/stubs.py

@@ -72,3 +72,7 @@
     for func in funcs:
         if func.__name__ not in name_to_func.keys():
             name_to_func[func.__name__] = func
+
+# sanity check public attributes are not empty
+for attr in __all__:
+    assert len(locals()[attr]) != 0, f"{attr} is empty"

array_api_tests/test_special_cases.py

@@ -1197,6 +1197,11 @@ def parse_binary_case_block(case_block: str) -> List[BinaryCase]:
 # its False - Hypothesis will complain if we reject too many examples, thus
 # indicating we've done something wrong.
 
+# sanity checks
+assert len(unary_params) != 0
+assert len(binary_params) != 0
+assert len(iop_params) != 0
+
 
 @pytest.mark.parametrize("func_name, func, case", unary_params)
 @given(