fix: constrained 0 length lists (#570)

Author: marcozzxx810

polyfactory/value_generators/constrained_collections.py

@@ -46,7 +46,7 @@ def handle_constrained_collection(
     collection: set[T] | list[T] = set() if (collection_type in (frozenset, set) or unique_items) else []
 
     try:
-        length = factory.__random__.randint(min_items, max_items) or 1
+        length = factory.__random__.randint(min_items, max_items)
         while (i := len(collection)) < length:
             if field_build_parameters and len(field_build_parameters) > i:
                 build_params = field_build_parameters[i]

tests/constraints/test_frozen_set_constraints.py

@@ -83,4 +83,4 @@ def test_handle_constrained_set_with_different_types(t_type: Any) -> None:
             field_meta=FieldMeta(name="test", annotation=frozenset, random=Random()),
             item_type=t_type,
         )
-        assert len(result) > 0
+        assert len(result) >= 0

tests/constraints/test_list_constraints.py

@@ -89,7 +89,7 @@ def test_handle_constrained_list_with_different_types(t_type: Any) -> None:
         field_meta=field_meta.children[0],  # type: ignore[index]
         item_type=t_type,
     )
-    assert len(result) > 0
+    assert len(result) >= 0
 
 
 def test_handle_unique_items() -> None:

tests/constraints/test_set_constraints.py

@@ -83,4 +83,4 @@ def test_handle_constrained_set_with_different_types(t_type: Any) -> None:
             field_meta=FieldMeta(name="test", annotation=set, random=Random()),
             item_type=t_type,
         )
-        assert len(result) > 0
+        assert len(result) >= 0