fix: ensure deterministic behavior for Use function with seeded random

polyfactory/factories/base.py

@@ -507,7 +507,7 @@ def seed_random(cls, seed: int) -> None:
         :returns: 'None'
 
         """
-        cls.__random__ = Random(seed)
+        cls.__random__.seed(seed)
         cls.__faker__.seed_instance(seed)
 
     @classmethod

tests/test_random_seed.py

@@ -3,6 +3,7 @@
 
 from pydantic import VERSION, BaseModel, Field
 
+from polyfactory.fields import Use
 from polyfactory.factories.pydantic_factory import ModelFactory
 
 
@@ -26,6 +27,24 @@ class MyModelFactory(ModelFactory):
     assert ins.special_id == "ID-515.943"
 
 
+def test_deterministic_use_function_seeding():
+    class MyModel(BaseModel):
+        choice_value: str
+
+    choices = ["option1", "option2", "option3", "option4", "option5"]
+
+    class MyModelFactory(ModelFactory):
+        __model__ = MyModel
+        choice_value = Use(ModelFactory.__random__.choice, choices)
+
+    ModelFactory.seed_random(12345)
+    first_batch = [MyModelFactory.build().choice_value for _ in range(10)]
+
+    ModelFactory.seed_random(12345) # Seed random again with the same value
+    second_batch = [MyModelFactory.build().choice_value for _ in range(10)]
+
+    assert first_batch == second_batch
+
 def test_deterministic_optionals_seeding() -> None:
     class ModelWithOptionalValues(BaseModel):
         name: Optional[str]