avoid logging socketcan exception on non-linux platforms (#1800)

Author: zariiii9003

can/interfaces/socketcan/utils.py

@@ -8,6 +8,7 @@
 import os
 import struct
 import subprocess
+import sys
 from typing import List, Optional, cast
 
 from can import typechecking
@@ -46,6 +47,8 @@ def find_available_interfaces() -> List[str]:
 
     :return: The list of available and active CAN interfaces or an empty list of the command failed
     """
+    if sys.platform != "linux":
+        return []
 
     try:
         command = ["ip", "-json", "link", "list", "up"]

test/test_socketcan_helpers.py

@@ -45,9 +45,11 @@ def test_find_available_interfaces_w_patch(self):
 
         with mock.patch("subprocess.check_output") as check_output:
             check_output.return_value = ip_output
-            ifs = find_available_interfaces()
 
-            self.assertEqual(["vcan0", "mycustomCan123"], ifs)
+            with mock.patch("sys.platform", "linux"):
+                ifs = find_available_interfaces()
+
+        self.assertEqual(["vcan0", "mycustomCan123"], ifs)
 
     def test_find_available_interfaces_exception(self):
         with mock.patch("subprocess.check_output") as check_output: