If no networks are found, return None rather than an empty
array. This is easier to check by the caller (and was assumed
in some cases). Also add an exception to get_ordered_network
if no network is found.
---
 autotests/util/iwd.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/autotests/util/iwd.py b/autotests/util/iwd.py
index 3ba5112c..35e5a693 100755
--- a/autotests/util/iwd.py
+++ b/autotests/util/iwd.py
@@ -376,6 +376,10 @@ class Device(IWDDBusAbstract):
         for bus_obj in self._station.GetOrderedNetworks():
             ordered_network = OrderedNetwork(bus_obj)
             ordered_networks.append(ordered_network)
+
+        if len(ordered_networks) == 0:
+            return None
+
         return ordered_networks
 
     def get_ordered_network(self, network):
@@ -385,6 +389,9 @@ class Device(IWDDBusAbstract):
         '''
         ordered_networks = self.get_ordered_networks()
 
+        if not ordered_networks:
+            raise Exception('Network %s not found' % network)
+
         for n in ordered_networks:
             if n.name == network:
                 return n
-- 
2.17.1