add test

tests/unit/test_message_serialization.py

@@ -83,3 +83,34 @@ def test_message_with_only_text_content_and_vision_disabled():
 
     assert serialized_message == expected_serialized_message
     assert message.contains_image is False
+
+
+def test_message_with_mixed_content_and_vision_disabled():
+    # Create a message with both text and image content
+    text_content1 = TextContent(text='This is a text message')
+    image_content1 = ImageContent(
+        image_urls=['http://example.com/image1.png', 'http://example.com/image2.png']
+    )
+    text_content2 = TextContent(text='This is another text message')
+    image_content2 = ImageContent(
+        image_urls=['http://example.com/image3.png', 'http://example.com/image4.png']
+    )
+
+    # Initialize Message with vision disabled
+    message = Message(
+        role='user',
+        content=[text_content1, image_content1, text_content2, image_content2],
+        vision_enabled=False,
+    )
+    serialized_message = message.serialize_model()
+
+    # Expected serialization ignores images and concatenates text
+    expected_serialized_message = {
+        'role': 'user',
+        'content': 'This is a text message\nThis is another text message',
+    }
+
+    # Assert serialized message matches expectation
+    assert serialized_message == expected_serialized_message
+    # Assert that images exist in the original message
+    assert message.contains_image