Tests for current_timestamp (#275)

* Test failure will confirm that it is not a timezone-naive data type

* Temporarily update dev-requirements.text

* Tests for current_timestamp

* Restore original dev-requirements.txt

tests/functional/adapter/utils/test_utils.py

@@ -4,6 +4,7 @@
 from dbt.tests.adapter.utils.test_bool_or import BaseBoolOr
 from dbt.tests.adapter.utils.test_cast_bool_to_text import BaseCastBoolToText
 from dbt.tests.adapter.utils.test_concat import BaseConcat
+from dbt.tests.adapter.utils.test_current_timestamp import BaseCurrentTimestampAware
 from dbt.tests.adapter.utils.test_dateadd import BaseDateAdd
 from dbt.tests.adapter.utils.test_datediff import BaseDateDiff
 from dbt.tests.adapter.utils.test_date_trunc import BaseDateTrunc
@@ -39,6 +40,11 @@ class TestConcat(BaseConcat):
     pass
 
 
+# Use either BaseCurrentTimestampAware or BaseCurrentTimestampNaive but not both
+class TestCurrentTimestamp(BaseCurrentTimestampAware):
+    pass
+
+
 class TestDateAdd(BaseDateAdd):
     pass