test: Correctly check number of test script arguments

len(sys.argv) gives the number of arguments including the
name of the command.

Fixes BMC#25722

diff --git a/test/enable-tethering b/test/enable-tethering
index c9668a1..cbcd4e7 100755 (executable)
--- a/test/enable-tethering
+++ b/test/enable-tethering
@@ -3,7 +3,7 @@
 import sys
 import dbus
 
-if (len(sys.argv) >= 2 and len(sys.argv) < 4 and sys.argv[1] == "wifi"):
+if (len(sys.argv) >= 3 and len(sys.argv) != 4 and sys.argv[1] == "wifi"):
        print "Usage: %s wifi [SSID] [passphrase]" % (sys.argv[0])
        sys.exit(1)
 elif (len(sys.argv) < 2):