Validate that dynamic rule goes are not reused

octodns/record/dynamic.py

@@ -271,7 +271,11 @@ class _DynamicMixin(object):
                         # currently looking at, e.g. geo=NA-US and there was a
                         # previous rule with NA
                         for seen, where in geos_seen.items():
-                            if geo.startswith(seen):
+                            if geo == seen:
+                                reasons.append(
+                                    f'rule {rule_num} targets geo {geo} which has previously been seen in rule {where}'
+                                )
+                            elif geo.startswith(seen):
                                 reasons.append(
                                     f'rule {rule_num} targets geo {geo} which is more specific than the previously seen {seen} in rule {where}'
                                 )

tests/test_octodns_record_dynamic.py

@@ -1299,6 +1299,7 @@ class TestRecordDynamic(TestCase):
         self.assertFalse(reasons)
         self.assertEqual({'sfo', 'iad'}, pools_seen)
 
+        # this one targets NA in rule 0 and then NA-Ca in rule 1
         pools = {'iad', 'sfo'}
         rules = [
             {'geos': ('AS', 'NA'), 'pool': 'sfo'},
@@ -1312,6 +1313,7 @@ class TestRecordDynamic(TestCase):
             reasons,
         )
 
+        # this one targets NA and NA-US in rule 0
         pools = {'sfo'}
         rules = [{'geos': ('AS', 'NA-US', 'NA'), 'pool': 'sfo'}]
         reasons, pools_seen = _DynamicMixin._validate_rules(pools, rules)
@@ -1321,3 +1323,15 @@ class TestRecordDynamic(TestCase):
             ],
             reasons,
         )
+
+        # this one targets the same geo in multiple rules
+        pools = {'iad', 'sfo'}
+        rules = [
+            {'geos': ('AS', 'NA'), 'pool': 'sfo'},
+            {'geos': ('EU', 'NA'), 'pool': 'iad'},
+        ]
+        reasons, pools_seen = _DynamicMixin._validate_rules(pools, rules)
+        self.assertEqual(
+            ['rule 2 targets geo NA which has previously been seen in rule 1'],
+            reasons,
+        )