Better logic and error message.

tests/bash_tests/unit_test.py

@@ -4,8 +4,11 @@ import system_tests
 import os
 import unittest
 
-bSkip=not os.path.isfile(system_tests.unit_tests) and not os.path.isfile(system_tests.unit_tests + '.exe')
+bSkip=not (os.path.isfile(system_tests.unit_tests) or os.path.isfile(system_tests.unit_tests + '.exe'))
 if bSkip:
-    raise unittest.SkipTest('*** %s does not exist ***' % system_tests.unit_tests)
+    msg='*** %s does not exist ***' % system_tests.unit_tests
+    print(msg)
+    raise unittest.SkipTest(msg)
 
 system_tests.BT.runTest(system_tests.unit_tests,raw=True)
+print('')