CT-1099: Migrate test 071_commented_yaml_regression_3568_tests

tests/functional/schema_tests/fixtures.py

@@ -536,6 +536,10 @@
 
 """
 
+all_quotes_schema__schema_yml = """# models/schema.yml
+# only comments here, which should be okay!
+# https://github.com/dbt-labs/dbt-core/issues/3568"""
+
 models_v2__render_test_cli_arg_models__schema_yml = """
 version: 2
 

tests/functional/schema_tests/test_schema_v2_tests.py

@@ -93,6 +93,7 @@
     macro_resolution_order_models__config_yml,
     macro_resolution_order_models__my_model_sql,
     alt_local_utils__macros__type_timestamp_sql,
+    all_quotes_schema__schema_yml,
 )
 from dbt.exceptions import ParsingException, CompilationException
 from dbt.contracts.results import TestStatus
@@ -991,6 +992,24 @@ def test_invalid_schema_file(
         assert re.search(r"'models' is not a list", str(exc))
 
 
+class TestCommentedSchema:
+    @pytest.fixture(scope="class")
+    def models(self):
+        return {
+            "schema.yml": all_quotes_schema__schema_yml,
+            "model.sql": invalid_schema_models__model_sql,
+        }
+
+    def test_quoted_schema_file(self, project):
+        try:
+            # A schema file consisting entirely of quotes should not be a problem
+            run_dbt(['parse'])
+        except TypeError:
+            assert False, '`dbt parse` failed with a yaml file that is all comments with the same exception as 3568'
+        except Exception:
+            assert False, '`dbt parse` failed with a yaml file that is all comments'
+
+
 class TestWrongSpecificationBlock:
     @pytest.fixture(scope="class")
     def models(self):