Add get_by_lcp_name() + tests

config/bridgedomain.py

@@ -26,6 +26,16 @@ def get_bridgedomains(yaml):
     return ret
 
 
+def get_by_lcp_name(yaml, lcpname):
+    """ Returns the bridgedomain by a given lcp name, or None,None if it does not exist """
+    if not 'bridgedomains' in yaml:
+        return None,None
+    for ifname, iface in yaml['bridgedomains'].items():
+        if 'lcp' in iface and iface['lcp'] == lcpname:
+            return ifname, iface
+    return None,None
+
+
 def get_by_name(yaml, ifname):
     """ Return the BridgeDomain by name, if it exists. Return None,None otherwise. """
     try: