Add tests for test_assert_only_unstructured_passes_for_primitives

Author: Tinche

tests/asserts.py tests/helpers.pytests/asserts.py renamed to tests/helpers.py

@@ -1,4 +1,4 @@
-"""Helpers for assertions."""
+"""Helpers for tests."""
 
 from typing import Any
 

tests/test_converter.py

@@ -32,7 +32,7 @@
 from cattrs.gen import make_dict_structure_fn, override
 
 from ._compat import is_py310_plus
-from .asserts import assert_only_unstructured
+from .helpers import assert_only_unstructured
 from .typed import (
     nested_typed_classes,
     simple_typed_attrs,

tests/test_gen_dict.py

@@ -13,7 +13,7 @@
 from cattrs.errors import ClassValidationError, ForbiddenExtraKeysError
 from cattrs.gen import make_dict_structure_fn, make_dict_unstructure_fn, override
 
-from .asserts import assert_only_unstructured
+from .helpers import assert_only_unstructured
 from .typed import nested_typed_classes, simple_typed_classes, simple_typed_dataclasses
 from .untyped import nested_classes, simple_classes
 

tests/test_helpers.py

@@ -0,0 +1,52 @@
+"""Tests for test helpers."""
+
+import pytest
+from attrs import define
+
+from .helpers import assert_only_unstructured
+
+
+def test_assert_only_unstructured_passes_for_primitives():
+    """assert_only_unstructured should pass for basic Python data types."""
+    # Test primitives
+    assert_only_unstructured(42)
+    assert_only_unstructured("hello")
+    assert_only_unstructured(3.14)
+    assert_only_unstructured(True)
+    assert_only_unstructured(None)
+
+    # Test collections of primitives
+    assert_only_unstructured([1, 2, 3])
+    assert_only_unstructured({"key": "value", "number": 42})
+    assert_only_unstructured((1, "two", 3.0))
+    assert_only_unstructured({1, 2, 3})
+    assert_only_unstructured(frozenset([1, 2, 3]))
+
+    # Test nested structures
+    assert_only_unstructured(
+        {"list": [1, 2, {"nested": "dict"}], "tuple": (True, None), "number": 42}
+    )
+
+
+def test_assert_only_unstructured_fails_for_attrs_classes():
+    """assert_only_unstructured should fail for attrs classes."""
+
+    @define
+    class SimpleAttrsClass:
+        value: int
+
+    instance = SimpleAttrsClass(42)
+
+    # Should raise AssertionError for attrs class instance
+    with pytest.raises(AssertionError):
+        assert_only_unstructured(instance)
+
+    # Should also fail when attrs instance is nested in collections
+    with pytest.raises(AssertionError):
+        assert_only_unstructured([instance])
+
+    with pytest.raises(AssertionError):
+        assert_only_unstructured({"key": instance})
+
+    with pytest.raises(AssertionError):
+        assert_only_unstructured((1, instance, 3))