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113 lines
4.1 KiB
Python
113 lines
4.1 KiB
Python
import pytest
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from langbot_plugin.api.entities.builtin.provider.message import Message, MessageChunk
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from langbot_plugin.api.entities.builtin.platform.message import File, MessageChain
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from langbot.pkg.pipeline.process.stream_results import coalesce_stream_results
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async def source(*items):
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for item in items:
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yield item
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@pytest.mark.asyncio
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async def test_terminal_snapshot_is_delivered_once_with_attachments():
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text = '<think>reasoning</think>answer'
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completed = Message(role='assistant', content=text)
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completed.attachments = MessageChain([File(url='https://example.com/report.txt', name='report.txt')])
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results = [
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item
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async for item in coalesce_stream_results(
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source(
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MessageChunk(role='assistant', content='answer', all_content=text, is_final=True),
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completed,
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)
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)
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]
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assert results == [completed]
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assert results[0].attachments is completed.attachments
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@pytest.mark.asyncio
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@pytest.mark.parametrize('with_snapshot', [False, True])
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async def test_progressive_chunks_are_not_buffered(with_snapshot):
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first = MessageChunk(role='assistant', content='hel', all_content='hel')
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final = MessageChunk(role='assistant', content='lo', all_content='hello', is_final=True)
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completed = Message(role='assistant', content='hello')
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stream = coalesce_stream_results(source(first, final, *([completed] if with_snapshot else [])))
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assert await anext(stream) == first
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assert [item async for item in stream] == [completed if with_snapshot else final]
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@pytest.mark.asyncio
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async def test_completed_only_and_distinct_messages_are_preserved():
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final = MessageChunk(role='assistant', content='first', is_final=True)
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other = Message(role='assistant', content='second')
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results = [item async for item in coalesce_stream_results(source(final, other))]
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assert [item.content for item in results] == ['first', 'second']
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assert [item async for item in coalesce_stream_results(source(other))] == [other]
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@pytest.mark.asyncio
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async def test_blank_terminal_delta_uses_completed_snapshot():
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completed = Message(role='assistant', content='answer')
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results = [
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item
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async for item in coalesce_stream_results(
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source(
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MessageChunk(role='assistant', is_final=True),
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completed,
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)
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)
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]
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assert results == [completed]
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@pytest.mark.asyncio
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async def test_failures_propagate_without_successful_final():
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async def failing():
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yield MessageChunk(role='assistant', content='partial')
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raise RuntimeError('provider failed')
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stream = coalesce_stream_results(failing())
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assert (await anext(stream)).content == 'partial'
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with pytest.raises(RuntimeError, match='provider failed'):
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await anext(stream)
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@pytest.mark.asyncio
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async def test_cumulative_stream_ends_with_last_snapshot_even_when_final_is_blank():
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results = [
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item
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async for item in coalesce_stream_results(
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source(
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MessageChunk(role='assistant', content='hel'),
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MessageChunk(role='assistant', content='hello'),
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MessageChunk(role='assistant', is_final=True),
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)
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)
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]
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assert [item.all_content for item in results] == ['hel', 'hello', 'hello']
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assert results[-1].is_final
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@pytest.mark.asyncio
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async def test_multi_round_completion_keeps_one_transcript_and_attachments():
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first = '<think>plan</think>I will create a file.'
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last = '<think>file created</think>Here is your file.'
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completed = Message(role='assistant', content=last)
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completed.attachments = MessageChain([File(name='report.txt', base64='aGVsbG8=')])
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results = [
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item
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async for item in coalesce_stream_results(
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source(
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MessageChunk(role='assistant', content=first, is_final=False),
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MessageChunk(role='assistant', content=first + last, is_final=True),
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completed,
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)
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)
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]
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assert len(results) == 2
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assert results[-1].content == first + last
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assert results[-1].attachments is completed.attachments
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