vxlan unit test - minor fixes

[vpp.git] / test / util.py

diff --git a/test/util.py b/test/util.py
index 6e7e275..ae887a5 100644 (file)
--- a/test/util.py
+++ b/test/util.py
@@ -1,4 +1,69 @@
 import socket
+import sys
+from abc import abstractmethod, ABCMeta
+from cStringIO import StringIO
+
+
+def ppp(headline, packet):
+    """ Return string containing the output of scapy packet.show() call. """
+    o = StringIO()
+    old_stdout = sys.stdout
+    sys.stdout = o
+    print(headline)
+    packet.show()
+    sys.stdout = old_stdout
+    return o.getvalue()
+
+
+def ppc(headline, capture, limit=10):
+    """ Return string containing ppp() printout for a capture.
+
+    :param headline: printed as first line of output
+    :param capture: packets to print
+    :param limit: limit the print to # of packets
+    """
+    if not capture:
+        return headline
+    tail = ""
+    if limit < len(capture):
+        tail = "\nPrint limit reached, %s out of %s packets printed" % (
+            len(capture), limit)
+        limit = len(capture)
+    body = "".join([ppp("Packet #%s:" % count, p)
+                    for count, p in zip(range(0, limit), capture)])
+    return "%s\n%s%s" % (headline, body, tail)
+
+
+def ip4_range(ip4, s, e):
+    tmp = ip4.rsplit('.', 1)[0]
+    return ("%s.%d" % (tmp, i) for i in range(s, e))
+
+
+def ip4n_range(ip4n, s, e):
+    ip4 = socket.inet_ntop(socket.AF_INET, ip4n)
+    return (socket.inet_pton(socket.AF_INET, ip) for ip in ip4_range(ip4, s, e))
+
+
+class NumericConstant(object):
+    __metaclass__ = ABCMeta
+
+    desc_dict = {}
+
+    @abstractmethod
+    def __init__(self, value):
+        self._value = value
+
+    def __int__(self):
+        return self._value
+
+    def __long__(self):
+        return self._value
+
+    def __str__(self):
+        if self._value in self.desc_dict:
+            return self.desc_dict[self._value]
+        return ""
+
 
 class Host(object):
     """ Generic test host "connected" to VPPs interface. """