support contracts on models materialized as view (#500)

* first pass with contract check

* rename test class

* file merge cleanup

* clean up tests

* changelog

* fix class name

* remove dbt-core pin

.changes/unreleased/Features-20230223-182450.yaml

@@ -1,6 +1,6 @@
 kind: Features
-body: implement data_type_code_to_name on SnowflakeConnectionManager
+body: Enforce contracts on models materialized as tables and views
 time: 2023-02-23T18:24:50.272955-05:00
 custom:
-  Author: michelleark
-  Issue: "464"
+  Author: michelleark emmyoop
+  Issue: 464 490

dbt/include/snowflake/macros/adapters.sql

@@ -94,6 +94,9 @@
     {{ get_persist_docs_column_list(model_columns, query_columns) }}
 
   {%- endif %}
+  {% if config.get('contract', False) -%}
+    {{ get_assert_columns_equivalent(sql) }}
+  {%- endif %}
   {% if copy_grants -%} copy grants {%- endif %} as (
     {{ sql }}
   );

tests/functional/adapter/test_constraints.py

@@ -2,7 +2,8 @@
 
 from dbt.tests.util import relation_from_name
 from dbt.tests.adapter.constraints.test_constraints import (
-    BaseConstraintsColumnsEqual,
+    BaseTableConstraintsColumnsEqual,
+    BaseViewConstraintsColumnsEqual,
     BaseConstraintsRuntimeEnforcement
 )
 
@@ -21,8 +22,7 @@
 """
 
 
-class TestSnowflakeConstraintsColumnsEqual(BaseConstraintsColumnsEqual):
-
+class SnowflakeColumnEqualSetup:
     @pytest.fixture
     def int_type(self):
         return "FIXED"
@@ -46,6 +46,13 @@ def data_types(self, int_type, schema_int_type, string_type):
             ["""TO_VARIANT(PARSE_JSON('{"key3": "value3", "key4": "value4"}'))""", 'variant', 'VARIANT'],
         ]
 
+class TestSnowflakeTableConstraintsColumnsEqual(SnowflakeColumnEqualSetup, BaseTableConstraintsColumnsEqual):
+    pass
+
+
+class TestSnowflakeViewConstraintsColumnsEqual(SnowflakeColumnEqualSetup, BaseViewConstraintsColumnsEqual):
+    pass
+
 
 class TestSnowflakeConstraintsRuntimeEnforcement(BaseConstraintsRuntimeEnforcement):