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hkuds--nanobot/tests/agent/test_loop_image_generation_media.py
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Python

from __future__ import annotations
from pathlib import Path
from typing import Any
from unittest.mock import AsyncMock, MagicMock
import pytest
from nanobot.agent.loop import AgentLoop
from nanobot.bus.events import InboundMessage
from nanobot.bus.queue import MessageBus
from nanobot.config.loader import set_config_path
from nanobot.config.schema import ImageGenerationToolConfig, ProviderConfig, ToolsConfig
from nanobot.providers.base import LLMResponse, ToolCallRequest
from nanobot.providers.image_generation import GeneratedImageResponse
PNG_DATA_URL = (
"data:image/png;base64,"
"iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8/x8AAwMCAO+/p9sAAAAASUVORK5CYII="
)
class FakeImageClient:
def __init__(self, **kwargs: Any) -> None:
pass
async def generate(self, **kwargs: Any) -> GeneratedImageResponse:
return GeneratedImageResponse(images=[PNG_DATA_URL], content="", raw={})
@pytest.mark.asyncio
async def test_outbound_no_longer_carries_generated_media(
tmp_path: Path,
monkeypatch: pytest.MonkeyPatch,
) -> None:
"""Media delivery is now the LLM's responsibility via the message tool."""
set_config_path(tmp_path / "config.json")
monkeypatch.setattr(
"nanobot.agent.tools.image_generation.get_image_gen_provider",
lambda name: FakeImageClient if name == "openrouter" else None,
)
provider = MagicMock()
provider.get_default_model.return_value = "test-model"
provider.generation.max_tokens = 4096
provider.chat_with_retry = AsyncMock(
side_effect=[
LLMResponse(
content="",
finish_reason="tool_calls",
tool_calls=[
ToolCallRequest(
id="call_img",
name="generate_image",
arguments={"prompt": "draw a tiny icon"},
)
],
),
LLMResponse(content="Done", finish_reason="stop"),
]
)
provider.chat_stream_with_retry = AsyncMock()
loop = AgentLoop(
bus=MessageBus(),
provider=provider,
workspace=tmp_path,
model="test-model",
tools_config=ToolsConfig(
image_generation=ImageGenerationToolConfig(enabled=True),
),
image_generation_provider_config=ProviderConfig(api_key="sk-or-test"),
)
loop.consolidator.maybe_consolidate_by_tokens = AsyncMock(return_value=False) # type: ignore[method-assign]
result = await loop._process_message(
InboundMessage(
channel="websocket",
sender_id="user",
chat_id="chat-image",
content="draw an icon",
)
)
assert result is not None
assert result.content == "Done"
# OutboundMessage no longer carries generated media —
# the LLM sends images via the message tool instead.
assert result.media == []