bugfix: ignore commented-out schema tests

dbt/parser.py

@@ -256,6 +256,9 @@ def parse_schema_tests(tests, root_project, projects):
 
         for model_name, test_spec in test_yml.items():
             for test_type, configs in test_spec.get('constraints', {}).items():
+                if configs is None:
+                    continue
+
                 for config in configs:
                     to_add = parse_schema_test(
                         test, model_name, config, test_type,

test/unit/test_parser.py

@@ -924,6 +924,29 @@ def test__simple_schema_test(self):
             }
         )
 
+    def test__schema_test_with_comments(self):
+        tests = [{
+            'name': 'commented_test',
+            'resource_type': 'test',
+            'package_name': 'root',
+            'root_path': get_os_path('/usr/src/app'),
+            'path': 'commented_test.yml',
+            'raw_sql': None,
+            'raw_yml': '''
+stripe_mrr:
+    constraints:
+        relationships:
+#            - {from: fly_customer_id, to: cio_accounts, field: id}
+'''
+        }]
+
+        self.assertEquals(
+            dbt.parser.parse_schema_tests(
+                tests,
+                self.root_project_config,
+                {'root': self.root_project_config,
+                 'snowplow': self.snowplow_project_config}),
+            {})
 
     def test__simple_data_test(self):
         tests = [{