Added another test for multiple inheritance

This test ensures that the __tablename__ is set correctly according to the
inheritance order of the mixins.

Author: RmStorm

tests/test_declarative.py

@@ -277,3 +277,22 @@ class MyTableWithName(MyTableNameMixin, db.Model):
 
     assert MyTableWithoutName.__table__.name == 'mytablewithoutname'
     assert MyTableWithName.__table__.name == 'manually_overwritten_name'
+
+
+async def test_multiple_inheritance_overwrite_declared_table_name():
+    class MyTableNameMixin:
+        @db.declared_attr
+        def __tablename__(cls):
+            return cls.__name__.lower()
+
+    class AnotherTableNameMixin:
+        __tablename__ = "static_table_name"
+
+    class MyTableWithoutName(AnotherTableNameMixin, MyTableNameMixin, db.Model):
+        id = db.Column(db.Integer, primary_key=True)
+
+    class MyOtherTableWithoutName(MyTableNameMixin, AnotherTableNameMixin, db.Model):
+        id = db.Column(db.Integer, primary_key=True)
+
+    assert MyTableWithoutName.__table__.name == 'static_table_name'
+    assert MyOtherTableWithoutName.__table__.name == 'myothertablewithoutname'