Add prefixlist.get_network_list() + tests

vppcfg/config/prefixlist.py

@@ -36,6 +36,20 @@ def get_by_name(yaml, plname):
     return None, None
 
 
+def get_network_list(yaml, plname):
+    """Returns a list of 0 or more ip_network elements, that represent the members
+    in a prefixlist of given name. Return the empty list if the prefixlist doesn't
+    exist"""
+    ret = []
+    plname, pl = get_by_name(yaml, plname)
+    if not pl:
+        return ret
+    for m in pl["members"]:
+        ipn = ipaddress.ip_network(m, strict=False)
+        ret.append(ipn)
+    return ret
+
+
 def count(yaml, plname):
     """Return the number of IPv4 and IPv6 entries in the prefixlist.
     Returns 0, 0 if it doesn't exist"""

vppcfg/config/test_prefixlist.py

@@ -75,3 +75,12 @@ class TestACLMethods(unittest.TestCase):
         self.assertFalse(prefixlist.is_empty(self.cfg, "trusted"))
         self.assertTrue(prefixlist.is_empty(self.cfg, "empty"))
         self.assertTrue(prefixlist.is_empty(self.cfg, "pl-noexist"))
+
+    def test_get_network_list(self):
+        l = prefixlist.get_network_list(self.cfg, "trusted")
+        self.assertIsInstance(l, list)
+        self.assertEquals(4, len(l))
+
+        l = prefixlist.get_network_list(self.cfg, "pl-notexist")
+        self.assertIsInstance(l, list)
+        self.assertEquals(0, len(l))