add tiny test for new exception being thrown

felixdivo · felixdivo · commit 4de88d205b82 · 2019-08-03T14:44:14.000+02:00
diff --git a/test/test_vector.py b/test/test_vector.py
@@ -8,6 +8,7 @@
 import ctypes
 import time
 import logging
+import os
 import unittest
 from unittest.mock import Mock
 
@@ -213,12 +214,19 @@ def test_shutdown(self) -> None:
         can.interfaces.vector.canlib.xldriver.xlClosePort.assert_called()
         can.interfaces.vector.canlib.xldriver.xlCloseDriver.assert_called()
 
-    def test_reset(self):
+    def test_reset(self) -> None:
         self.bus = can.Bus(channel=0, bustype="vector", _testing=True)
         self.bus.reset()
         can.interfaces.vector.canlib.xldriver.xlDeactivateChannel.assert_called()
         can.interfaces.vector.canlib.xldriver.xlActivateChannel.assert_called()
 
+    def test_called_without_testing_argument(self) -> None:
+        """This tests if an exception is thrown when we are not running on Windows."""
+        if os.name != "nt":
+            with self.assertRaises(OSError):
+                # do not set the _testing argument, since it supresses the exception
+                can.Bus(channel=0, bustype="vector")
+
 
 def xlGetApplConfig(
     app_name_p: ctypes.c_char_p,
