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LangBot/tests/unit_tests/platform/test_websocket_adapter_attachments.py
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2026-07-19 09:58:59 +08:00

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Python

"""Unit tests for WebSocketAdapter._process_image_components.
The web debug client uploads Image / Voice / File components carrying a storage
key in ``path``. This helper resolves each to a base64 data URI (so multimodal
LLM input and the Box sandbox inbox have usable bytes), then deletes the
consumed storage object and clears ``path``. Covers mimetype selection per
type and fail-closed error handling.
"""
from __future__ import annotations
import base64
from types import SimpleNamespace
from unittest.mock import AsyncMock, Mock
import pytest
from langbot.pkg.api.http.context import ExecutionContext
from langbot.pkg.platform.sources.websocket_adapter import WebSocketAdapter
_CONTEXT = ExecutionContext(
instance_uuid='instance-a',
workspace_uuid='workspace-a',
placement_generation=1,
pipeline_uuid='pipeline-a',
)
_UPLOAD_PREFIX = 'v1/instance-a/workspace-a/1/upload_image/'
def _make_connection():
return SimpleNamespace(execution_context=_CONTEXT)
def _make_adapter(load_return=b'hello', load_side_effect=None):
provider = Mock()
provider.load = AsyncMock(return_value=load_return, side_effect=load_side_effect)
storage_mgr = Mock()
storage_mgr.storage_provider = provider
storage_mgr.scoped_prefix.return_value = _UPLOAD_PREFIX
storage_mgr.is_scoped_object_key.return_value = True
storage_mgr.delete_scoped_object_key = AsyncMock()
ap = Mock()
ap.storage_mgr = storage_mgr
logger = Mock()
logger.error = AsyncMock()
logger.warning = AsyncMock()
# WebSocketAdapter is a pydantic model; bypass full __init__/validation.
adapter = WebSocketAdapter.model_construct(ap=ap, logger=logger)
return adapter, storage_mgr, provider
@pytest.mark.asyncio
async def test_image_jpeg_mimetype_and_cleanup():
adapter, storage_mgr, _ = _make_adapter(load_return=b'\xff\xd8\xff')
path = f'{_UPLOAD_PREFIX}photo.jpg'
chain = [{'type': 'Image', 'path': path}]
await adapter._process_image_components(_make_connection(), chain)
expected_b64 = base64.b64encode(b'\xff\xd8\xff').decode('utf-8')
assert chain[0]['base64'] == f'data:image/jpeg;base64,{expected_b64}'
assert chain[0]['path'] == '' # consumed
storage_mgr.delete_scoped_object_key.assert_awaited_once_with(
_CONTEXT,
path,
expected_owner_type='upload_image',
)
@pytest.mark.asyncio
async def test_image_defaults_to_png():
adapter, _, _ = _make_adapter()
chain = [{'type': 'Image', 'path': f'{_UPLOAD_PREFIX}blob'}]
await adapter._process_image_components(_make_connection(), chain)
assert chain[0]['base64'].startswith('data:image/png;base64,')
@pytest.mark.asyncio
async def test_voice_uses_guessed_or_wav_mimetype():
adapter, _, _ = _make_adapter()
chain = [{'type': 'Voice', 'path': f'{_UPLOAD_PREFIX}clip.wav'}]
await adapter._process_image_components(_make_connection(), chain)
assert chain[0]['base64'].startswith('data:audio/')
@pytest.mark.asyncio
async def test_file_uses_octet_stream_fallback():
adapter, _, _ = _make_adapter()
chain = [{'type': 'File', 'path': f'{_UPLOAD_PREFIX}unknownblob'}]
await adapter._process_image_components(_make_connection(), chain)
assert chain[0]['base64'].startswith('data:application/octet-stream;base64,')
@pytest.mark.asyncio
async def test_skips_components_without_path_or_unknown_type():
adapter, _, provider = _make_adapter()
chain = [
{'type': 'Image', 'path': ''}, # no path
{'type': 'Plain', 'path': 'storage://abc/x'}, # not a file component
{'type': 'At', 'target': '123'}, # no path key at all
]
await adapter._process_image_components(_make_connection(), chain)
provider.load.assert_not_awaited()
assert 'base64' not in chain[0]
assert 'base64' not in chain[1]
@pytest.mark.asyncio
async def test_load_failure_is_logged_and_aborts_processing():
adapter, _, _ = _make_adapter(load_side_effect=RuntimeError('storage down'))
chain = [{'type': 'File', 'path': f'{_UPLOAD_PREFIX}doc.pdf'}]
with pytest.raises(RuntimeError, match='storage down'):
await adapter._process_image_components(_make_connection(), chain)
assert 'base64' not in chain[0]
adapter.logger.error.assert_awaited_once()