fix validate connection failing (dbt-labs#168)

* fix validate connection failing

* fix code check

* more format

dbt/adapters/bigquery/connections.py

@@ -380,8 +380,11 @@ def raw_execute(self, sql, fetch=False, *, use_legacy_sql=False):
         client = conn.handle
 
         fire_event(SQLQuery(conn_name=conn.name, sql=sql))
-
-        if self.profile.query_comment and self.profile.query_comment.job_label:
+        if (
+            hasattr(self.profile, "query_comment")
+            and self.profile.query_comment
+            and self.profile.query_comment.job_label
+        ):
             query_comment = self.query_header.comment.query_comment
             labels = self._labels_from_query_comment(query_comment)
         else:
@@ -475,7 +478,10 @@ def execute(
             message = f"{code} ({num_rows_formated} rows, {processed_bytes} processed)"
 
         response = BigQueryAdapterResponse(  # type: ignore[call-arg]
-            _message=message, rows_affected=num_rows, code=code, bytes_processed=bytes_processed
+            _message=message,
+            rows_affected=num_rows,
+            code=code,
+            bytes_processed=bytes_processed,
         )
 
         return response, table
@@ -530,7 +536,8 @@ def copy_and_results():
 
         self._retry_and_handle(
             msg='copy table "{}" to "{}"'.format(
-                ", ".join(source_ref.path for source_ref in source_ref_array), destination_ref.path
+                ", ".join(source_ref.path for source_ref in source_ref_array),
+                destination_ref.path,
             ),
             conn=conn,
             fn=copy_and_results,
@@ -572,7 +579,12 @@ def fn():
         self._retry_and_handle(msg="create dataset", conn=conn, fn=fn)
 
     def _query_and_results(
-        self, client, sql, job_params, job_creation_timeout=None, job_execution_timeout=None
+        self,
+        client,
+        sql,
+        job_params,
+        job_creation_timeout=None,
+        job_execution_timeout=None,
     ):
         """Query the client and wait for results."""
         # Cannot reuse job_config if destination is set and ddl is used

tests/functional/adapter/test_basic.py

@@ -12,6 +12,7 @@
 from dbt.tests.adapter.basic.test_snapshot_check_cols import BaseSnapshotCheckCols
 from dbt.tests.adapter.basic.test_snapshot_timestamp import BaseSnapshotTimestamp
 from dbt.tests.adapter.basic.test_adapter_methods import BaseAdapterMethod
+from dbt.tests.adapter.basic.test_validate_connection import BaseValidateConnection
 
 
 class TestSimpleMaterializationsBigQuery(BaseSimpleMaterializations):
@@ -54,3 +55,6 @@ class TestSnapshotTimestampBigQuery(BaseSnapshotTimestamp):
 
 class TestBaseAdapterMethodBigQuery(BaseAdapterMethod):
     pass
+
+class TestBigQueryValidateConnection(BaseValidateConnection):
+    pass