Update zeroconf test to display expected result

tests/test_zeroconf.py

@@ -7,10 +7,17 @@
 
 def test_zeroconf():
   """ Unit test for zeroconf advertisement """
+  FAKE_PORT = 9898
 
-  # get default network interface
+  # get network interface and MAC address that the service is expected to be advertised on
   iface = ni.gateways()['default'][ni.AF_INET][1]
-  FAKE_PORT = 9898
+  try:
+    mac_addr = ni.ifaddresses(iface)[ni.AF_LINK][0]['addr']
+  except:
+    mac_addr = 'none'
+
+  AMPLIPI_ZC_NAME = f'amplipi-{mac_addr}._amplipi._tcp.local.'
+  print(f'Expecting that "{AMPLIPI_ZC_NAME}" is advertised to interface {iface}')
 
   services_advertised = {}
 
@@ -34,14 +41,6 @@ def on_service_state_change(zeroconf: Zeroconf, service_type: str, name: str, st
   # wait enough time for a response from the service
   sleep(2)
 
-  # figure out what the name will be
-  try:
-    mac_addr = ni.ifaddresses(iface)[ni.AF_LINK][0]['addr']
-  except:
-    mac_addr = 'none'
-
-  AMPLIPI_ZC_NAME = f'amplipi-{mac_addr}._amplipi._tcp.local.'
-
   # stop the advertiser
   event.set()
   zc_reg.join()