Fix accident in cuda_bindings/cuda/bindings/_path_finder/supported_libs.py (#655)

* Fix accident discovered in passing.

* Add test_libname_dict_values_are_unique()

Author: rwgk

cuda_bindings/cuda/bindings/_path_finder/supported_libs.py

@@ -256,8 +256,6 @@
     "cufft": (
         "cufft64_10.dll",
         "cufft64_11.dll",
-        "cufftw64_10.dll",
-        "cufftw64_11.dll",
     ),
     "cufftw": (
         "cufftw64_10.dll",

cuda_bindings/tests/test_path_finder_load.py

@@ -30,6 +30,18 @@ def test_all_libnames_windows_dlls_consistency():
     assert tuple(sorted(ALL_LIBNAMES_WINDOWS)) == tuple(sorted(supported_libs.SUPPORTED_WINDOWS_DLLS.keys()))
 
 
+@pytest.mark.parametrize("dict_name", ["SUPPORTED_LINUX_SONAMES", "SUPPORTED_WINDOWS_DLLS"])
+def test_libname_dict_values_are_unique(dict_name):
+    libname_dict = getattr(supported_libs, dict_name)
+    libname_for_value = {}
+    for libname, values in libname_dict.items():
+        for value in values:
+            prev_libname = libname_for_value.get(value)
+            if prev_libname is not None:
+                raise RuntimeError(f"Multiple libnames for {value!r}: {prev_libname}, {libname}")
+            libname_for_value[value] = libname
+
+
 def test_all_libnames_libnames_requiring_os_add_dll_directory_consistency():
     assert not (set(supported_libs.LIBNAMES_REQUIRING_OS_ADD_DLL_DIRECTORY) - set(ALL_LIBNAMES_WINDOWS))