chore: fix build and lint errors (#351)

* chore: fix build and lint errors

* test: skip another test using auto increment

* test: skip isolation level test

Author: olavloite

google/cloud/sqlalchemy_spanner/sqlalchemy_spanner.py

@@ -304,7 +304,7 @@ def render_literal_value(self, value, type_):
         generate a SQL statement.
         """
         raw = ["\\", "'", '"', "\n", "\t", "\r"]
-        if type(value) == str and any(single in value for single in raw):
+        if isinstance(value, str) and any(single in value for single in raw):
             value = 'r"""{}"""'.format(value)
             return value
         else:

test/test_suite_20.py

@@ -2111,6 +2111,10 @@ def test_empty_insert_multiple(self):
     def test_insert_from_select_autoinc(self):
         pass
 
+    @pytest.mark.skip("Spanner does not support auto increment")
+    def test_no_results_for_non_returning_insert(self, connection, style, executemany):
+        pass
+
     def test_autoclose_on_insert(self):
         """
         SPANNER OVERRIDE:
@@ -2495,6 +2499,17 @@ class IsOrIsNotDistinctFromTest(_IsOrIsNotDistinctFromTest):
     pass
 
 
+@pytest.mark.skip("Spanner doesn't bizarre characters in foreign key names")
+class BizarroCharacterFKResolutionTest(fixtures.TestBase):
+    pass
+
+
+class IsolationLevelTest(fixtures.TestBase):
+    @pytest.mark.skip("Cloud Spanner does not support different isolation levels")
+    def test_dialect_user_setting_is_restored(self, testing_engine):
+        pass
+
+
 class OrderByLabelTest(_OrderByLabelTest):
     @pytest.mark.skip(
         "Spanner requires an alias for the GROUP BY list when specifying derived "