Better tests + fixes

appveyor.yml

@@ -31,7 +31,7 @@ test_script:
   - 'del test\bpf.uts' # Don't bother with BPF regression tests
   - "%PYTHON%\\python -m coverage run --parallel-mode bin\\UTscapy -c test\\configs\\windows.utsc || exit /b 42"
   
-  # Tls unit tests
+  # TLS unit tests
   # Note: due to a multiprocessing bug, we got to be in the UTscapy.py folder and call it directly
   - 'cd scapy/tools'
   - "%PYTHON%\\python -m coverage run --concurrency=multiprocessing UTscapy.py -f text -t ..\\..\\test\\tls\\tests_tls_netaccess.uts -F -P \"sys.path.append(os.path.abspath('../../test/tls'))\" -K open_ssl_client || exit /b 42"

test/mock_windows.uts

@@ -209,9 +209,27 @@ assert _correct
 
 = show_interfaces
 
-from scapy.arch import *
-show_interfaces()
+from scapy.arch import show_interfaces
+from StringIO import StringIO
+
+@mock.patch('sys.stdout', new_callable=StringIO)
+def test_show_interfaces(mock_stdout):
+    show_interfaces()
+    lines = mock_stdout.getvalue().split("\n")[1:]
+    for l in lines:
+        if not l.strip():
+            continue
+        try:
+            int(l[0])
+        except:
+            sys.stderr.write(l)
+            return False
+    return True
+
+assert test_show_interfaces()
 
 = dev_from_pcapname
 
+from scapy.config import conf
+
 assert dev_from_pcapname(conf.iface.pcap_name).guid == conf.iface.guid