chore: import upstream snapshot with attribution

test/utils/test_deserialization.py

@@ -0,0 +1,51 @@
+# SPDX-FileCopyrightText: 2022-present deepset GmbH <info@deepset.ai>
+#
+# SPDX-License-Identifier: Apache-2.0
+
+
+import pytest
+
+from haystack.components.generators.chat.openai import OpenAIChatGenerator
+from haystack.core.errors import DeserializationError
+from haystack.utils.deserialization import deserialize_component_inplace
+
+
+class ChatGeneratorWithoutFromDict:
+    def to_dict(self):
+        return {"type": "test_deserialization.ChatGeneratorWithoutFromDict"}
+
+
+class TestDeserializeComponentInplace:
+    def test_deserialize_component_inplace(self, monkeypatch):
+        monkeypatch.setenv("OPENAI_API_KEY", "test-api-key")
+        chat_generator = OpenAIChatGenerator()
+        data = {"chat_generator": chat_generator.to_dict()}
+        deserialize_component_inplace(data)
+        assert isinstance(data["chat_generator"], OpenAIChatGenerator)
+        assert data["chat_generator"].to_dict() == chat_generator.to_dict()
+
+    def test_missing_key(self):
+        data = {"some_key": "some_value"}
+        with pytest.raises(DeserializationError):
+            deserialize_component_inplace(data)
+
+    def test_component_is_not_a_dict(self):
+        data = {"chat_generator": "not_a_dict"}
+        with pytest.raises(DeserializationError):
+            deserialize_component_inplace(data)
+
+    def test_type_key_missing(self):
+        data = {"chat_generator": {"some_key": "some_value"}}
+        with pytest.raises(DeserializationError):
+            deserialize_component_inplace(data)
+
+    def test_class_not_correctly_imported(self):
+        data = {"chat_generator": {"type": "invalid.module.InvalidClass"}}
+        with pytest.raises(DeserializationError):
+            deserialize_component_inplace(data)
+
+    def test_component_no_from_dict_method(self):
+        chat_generator = ChatGeneratorWithoutFromDict()
+        data = {"chat_generator": chat_generator.to_dict()}
+        deserialize_component_inplace(data)
+        assert isinstance(data["chat_generator"], ChatGeneratorWithoutFromDict)