Move the output around - first print the unexpected messages, only then fail the assertions

tests.py

@@ -58,12 +58,6 @@ class YAMLTest(unittest.TestCase):
 
         v = Validator(schema=self.yaml_schema)
         rv, msgs = v.validate(cfg)
-        count = 0
-        if 'test' in unittest and 'errors' in unittest['test'] and 'count' in unittest['test']['errors']:
-            count = unittest['test']['errors']['count']
-        if len(msgs) != count:
-            print(msgs, file=sys.stderr)
-        self.assertEqual(len(msgs), count)
 
         msgs_unexpected = 0
         msgs_expected = []
@@ -80,6 +74,12 @@ class YAMLTest(unittest.TestCase):
             if not this_msg_expected:
                 print("%s: Unexpected message: %s" % (self.yaml_filename, m), file=sys.stderr)
                 fail = True
+
+        count = 0
+        if 'test' in unittest and 'errors' in unittest['test'] and 'count' in unittest['test']['errors']:
+            count = unittest['test']['errors']['count']
+
+        self.assertEqual(len(msgs), count)
         self.assertFalse(fail)
 
         return

unittest/yaml/error-subinterface4.yaml

@@ -1,22 +0,0 @@
-test:
-  description: "The length of the generated child LCP name is too long"
-  errors:
-    expected:
-     - "sub-interface .* has LCP with too long name"
-    count: 1
----
-interfaces:
-  GigabitEthernet1/0/0:
-    lcp: "e01234"
-    sub-interfaces:
-      100:
-        description: "Dot1Q subinterface"
-        encapsulation:
-          dot1q: 1234
-      101:
-        description: "QinQ subinterface"
-        addresses: [ 192.0.2.1/24 ]
-        encapsulation:
-          dot1q: 1234
-          inner-dot1q: 2345
-