fix plain classes using __future__ annotations

Author: giograno

src/py_avro_schema/_testing.py

@@ -13,8 +13,6 @@
 """
 Test functions
 """
-from __future__ import annotations
-
 import dataclasses
 import difflib
 from typing import Dict, Type, Union
@@ -59,10 +57,3 @@ class PyType:
     """For testing"""
 
     field_a: str
-
-Name = str
-
-class PyClass:
-    """For testing"""
-
-    name: Name

tests/models/__init__.py

@@ -0,0 +1,9 @@
+from __future__ import annotations
+
+Name = str
+
+
+class PyClass:
+    """For testing imports with future annotations"""
+
+    name: Name

tests/models/forward.py

@@ -18,6 +18,7 @@
 from py_avro_schema._alias import Alias, Opaque, register_type_aliases
 from py_avro_schema._testing import assert_schema
 
+
 def test_plain_class_with_type_hints():
     @register_type_aliases(aliases=["test_plain_class.OldPyType"])
     class PyType:
@@ -155,7 +156,7 @@ class PyClass:
 
 
 def test_type_aliases_future():
-    from py_avro_schema._testing import PyClass
+    from tests.models.forward import PyClass
 
     expected = {"fields": [{"name": "name", "type": "string"}], "name": "PyClass", "type": "record"}
     assert_schema(PyClass, expected)