tjb-tech
376 lines
13 KiB
Python
376 lines
13 KiB
Python
"""Tests for the React backend host protocol."""
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from __future__ import annotations
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import io
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import json
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import pytest
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from openharness.api.client import ApiMessageCompleteEvent
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from openharness.api.usage import UsageSnapshot
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from openharness.engine.messages import ConversationMessage, TextBlock
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from openharness.ui.backend_host import BackendHostConfig, ReactBackendHost
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from openharness.ui.protocol import BackendEvent
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from openharness.ui.runtime import build_runtime, close_runtime, start_runtime
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class StaticApiClient:
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"""Fake streaming client for backend host tests."""
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def __init__(self, text: str) -> None:
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self._text = text
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async def stream_message(self, request):
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del request
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yield ApiMessageCompleteEvent(
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message=ConversationMessage(role="assistant", content=[TextBlock(text=self._text)]),
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usage=UsageSnapshot(input_tokens=2, output_tokens=3),
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stop_reason=None,
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)
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class FailingApiClient:
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"""Fake client that triggers the query-loop ErrorEvent path."""
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def __init__(self, message: str) -> None:
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self._message = message
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async def stream_message(self, request):
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del request
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if False:
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yield None
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raise RuntimeError(self._message)
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class FakeBinaryStdout:
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"""Capture protocol writes through a binary stdout buffer."""
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def __init__(self) -> None:
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self.buffer = io.BytesIO()
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def flush(self) -> None:
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return None
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@pytest.mark.asyncio
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async def test_backend_host_processes_command(tmp_path, monkeypatch):
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monkeypatch.chdir(tmp_path)
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monkeypatch.setenv("OPENHARNESS_CONFIG_DIR", str(tmp_path / "config"))
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monkeypatch.setenv("OPENHARNESS_DATA_DIR", str(tmp_path / "data"))
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host = ReactBackendHost(BackendHostConfig(api_client=StaticApiClient("unused")))
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host._bundle = await build_runtime(api_client=StaticApiClient("unused"))
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events = []
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async def _emit(event):
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events.append(event)
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host._emit = _emit # type: ignore[method-assign]
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await start_runtime(host._bundle)
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try:
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should_continue = await host._process_line("/version")
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finally:
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await close_runtime(host._bundle)
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assert should_continue is True
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assert any(event.type == "transcript_item" and event.item and event.item.role == "user" for event in events)
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assert any(
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event.type == "transcript_item"
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and event.item
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and event.item.role == "system"
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and "OpenHarness" in event.item.text
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for event in events
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)
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assert any(event.type == "state_snapshot" for event in events)
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@pytest.mark.asyncio
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async def test_backend_host_processes_model_turn(tmp_path, monkeypatch):
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monkeypatch.chdir(tmp_path)
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monkeypatch.setenv("OPENHARNESS_CONFIG_DIR", str(tmp_path / "config"))
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monkeypatch.setenv("OPENHARNESS_DATA_DIR", str(tmp_path / "data"))
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host = ReactBackendHost(BackendHostConfig(api_client=StaticApiClient("hello from react backend")))
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host._bundle = await build_runtime(api_client=StaticApiClient("hello from react backend"))
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events = []
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async def _emit(event):
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events.append(event)
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host._emit = _emit # type: ignore[method-assign]
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await start_runtime(host._bundle)
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try:
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should_continue = await host._process_line("hi")
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finally:
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await close_runtime(host._bundle)
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assert should_continue is True
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assert any(
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event.type == "assistant_complete" and event.message == "hello from react backend"
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for event in events
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)
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assert any(
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event.type == "assistant_complete"
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and event.item
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and event.item.role == "assistant"
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and "hello from react backend" in event.item.text
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for event in events
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)
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@pytest.mark.asyncio
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async def test_backend_host_surfaces_query_errors(tmp_path, monkeypatch):
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monkeypatch.chdir(tmp_path)
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monkeypatch.setenv("OPENHARNESS_CONFIG_DIR", str(tmp_path / "config"))
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monkeypatch.setenv("OPENHARNESS_DATA_DIR", str(tmp_path / "data"))
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host = ReactBackendHost(BackendHostConfig(api_client=FailingApiClient("rate limit")))
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host._bundle = await build_runtime(api_client=FailingApiClient("rate limit"))
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events = []
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async def _emit(event):
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events.append(event)
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host._emit = _emit # type: ignore[method-assign]
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await start_runtime(host._bundle)
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try:
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should_continue = await host._process_line("hi")
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finally:
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await close_runtime(host._bundle)
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assert should_continue is True
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assert any(event.type == "error" and "rate limit" in event.message for event in events)
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assert any(
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event.type == "transcript_item"
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and event.item
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and event.item.role == "system"
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and "rate limit" in event.item.text
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for event in events
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)
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@pytest.mark.asyncio
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async def test_backend_host_command_does_not_reset_cli_overrides(tmp_path, monkeypatch):
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"""Regression: slash commands should not snap model/provider back to persisted defaults.
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When the session is launched with CLI overrides (e.g. --provider openai -m 5.4),
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issuing a command like /fast triggers a UI state refresh. That refresh must
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preserve the effective session settings, not reload ~/.openharness/settings.json
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verbatim.
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"""
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monkeypatch.chdir(tmp_path)
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monkeypatch.setenv("OPENHARNESS_CONFIG_DIR", str(tmp_path / "config"))
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monkeypatch.setenv("OPENHARNESS_DATA_DIR", str(tmp_path / "data"))
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host = ReactBackendHost(BackendHostConfig(api_client=StaticApiClient("unused")))
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host._bundle = await build_runtime(
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api_client=StaticApiClient("unused"),
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model="5.4",
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api_format="openai",
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)
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events = []
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async def _emit(event):
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events.append(event)
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host._emit = _emit # type: ignore[method-assign]
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await start_runtime(host._bundle)
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try:
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# Sanity: the initial session state reflects CLI overrides.
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assert host._bundle.app_state.get().model == "5.4"
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assert host._bundle.app_state.get().provider == "openai-compatible"
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# Run a command that triggers sync_app_state.
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await host._process_line("/fast show")
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# CLI overrides should remain in effect.
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assert host._bundle.app_state.get().model == "5.4"
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assert host._bundle.app_state.get().provider == "openai-compatible"
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finally:
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await close_runtime(host._bundle)
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@pytest.mark.asyncio
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async def test_build_runtime_leaves_interactive_sessions_unbounded_by_default(tmp_path, monkeypatch):
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monkeypatch.chdir(tmp_path)
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monkeypatch.setenv("OPENHARNESS_CONFIG_DIR", str(tmp_path / "config"))
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monkeypatch.setenv("OPENHARNESS_DATA_DIR", str(tmp_path / "data"))
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bundle = await build_runtime(
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api_client=StaticApiClient("unused"),
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enforce_max_turns=False,
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)
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try:
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assert bundle.engine.max_turns is None
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assert bundle.enforce_max_turns is False
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finally:
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await close_runtime(bundle)
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@pytest.mark.asyncio
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async def test_backend_host_emits_utf8_protocol_bytes(monkeypatch):
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host = ReactBackendHost(BackendHostConfig())
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fake_stdout = FakeBinaryStdout()
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monkeypatch.setattr("openharness.ui.backend_host.sys.stdout", fake_stdout)
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await host._emit(BackendEvent(type="assistant_delta", message="你好😊"))
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raw = fake_stdout.buffer.getvalue()
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assert raw.startswith(b"OHJSON:")
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decoded = raw.decode("utf-8").strip()
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payload = json.loads(decoded.removeprefix("OHJSON:"))
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assert payload["type"] == "assistant_delta"
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assert payload["message"] == "你好😊"
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@pytest.mark.asyncio
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async def test_backend_host_emits_model_select_request(tmp_path, monkeypatch):
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monkeypatch.chdir(tmp_path)
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monkeypatch.setenv("OPENHARNESS_CONFIG_DIR", str(tmp_path / "config"))
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monkeypatch.setenv("OPENHARNESS_DATA_DIR", str(tmp_path / "data"))
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host = ReactBackendHost(BackendHostConfig(api_client=StaticApiClient("unused")))
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host._bundle = await build_runtime(api_client=StaticApiClient("unused"), model="opus", api_format="anthropic")
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events = []
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async def _emit(event):
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events.append(event)
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host._emit = _emit # type: ignore[method-assign]
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await start_runtime(host._bundle)
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try:
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await host._handle_select_command("model")
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finally:
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await close_runtime(host._bundle)
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event = next(item for item in events if item.type == "select_request")
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assert event.modal["command"] == "model"
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assert any(option["value"] == "opus" and option.get("active") for option in event.select_options)
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assert any(option["value"] == "default" for option in event.select_options)
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@pytest.mark.asyncio
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async def test_backend_host_emits_theme_select_request(tmp_path, monkeypatch):
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monkeypatch.chdir(tmp_path)
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monkeypatch.setenv("OPENHARNESS_CONFIG_DIR", str(tmp_path / "config"))
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monkeypatch.setenv("OPENHARNESS_DATA_DIR", str(tmp_path / "data"))
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host = ReactBackendHost(BackendHostConfig(api_client=StaticApiClient("unused")))
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host._bundle = await build_runtime(api_client=StaticApiClient("unused"))
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events = []
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async def _emit(event):
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events.append(event)
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host._emit = _emit # type: ignore[method-assign]
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await start_runtime(host._bundle)
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try:
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await host._handle_select_command("theme")
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finally:
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await close_runtime(host._bundle)
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event = next(item for item in events if item.type == "select_request")
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assert event.modal["command"] == "theme"
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assert any(option["value"] == "default" for option in event.select_options)
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@pytest.mark.asyncio
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async def test_backend_host_emits_turns_select_request_with_unlimited_option(tmp_path, monkeypatch):
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monkeypatch.chdir(tmp_path)
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monkeypatch.setenv("OPENHARNESS_CONFIG_DIR", str(tmp_path / "config"))
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monkeypatch.setenv("OPENHARNESS_DATA_DIR", str(tmp_path / "data"))
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host = ReactBackendHost(BackendHostConfig(api_client=StaticApiClient("unused")))
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host._bundle = await build_runtime(api_client=StaticApiClient("unused"), enforce_max_turns=False)
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events = []
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async def _emit(event):
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events.append(event)
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host._emit = _emit # type: ignore[method-assign]
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await start_runtime(host._bundle)
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try:
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await host._handle_select_command("turns")
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finally:
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await close_runtime(host._bundle)
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event = next(item for item in events if item.type == "select_request")
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assert event.modal["command"] == "turns"
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assert any(option["value"] == "unlimited" and option.get("active") for option in event.select_options)
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@pytest.mark.asyncio
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async def test_backend_host_emits_provider_select_request(tmp_path, monkeypatch):
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monkeypatch.chdir(tmp_path)
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monkeypatch.setenv("OPENHARNESS_CONFIG_DIR", str(tmp_path / "config"))
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monkeypatch.setenv("OPENHARNESS_DATA_DIR", str(tmp_path / "data"))
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host = ReactBackendHost(BackendHostConfig(api_client=StaticApiClient("unused")))
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host._bundle = await build_runtime(api_client=StaticApiClient("unused"))
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events = []
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async def _emit(event):
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events.append(event)
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host._emit = _emit # type: ignore[method-assign]
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await start_runtime(host._bundle)
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try:
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await host._handle_select_command("provider")
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finally:
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await close_runtime(host._bundle)
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event = next(item for item in events if item.type == "select_request")
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assert event.modal["command"] == "provider"
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assert any(option["value"] == "claude-api" and option.get("active") for option in event.select_options)
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@pytest.mark.asyncio
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async def test_backend_host_apply_select_command_shows_single_segment_transcript(tmp_path, monkeypatch):
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monkeypatch.chdir(tmp_path)
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monkeypatch.setenv("OPENHARNESS_CONFIG_DIR", str(tmp_path / "config"))
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monkeypatch.setenv("OPENHARNESS_DATA_DIR", str(tmp_path / "data"))
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host = ReactBackendHost(BackendHostConfig(api_client=StaticApiClient("unused")))
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host._bundle = await build_runtime(api_client=StaticApiClient("unused"))
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events = []
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async def _emit(event):
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events.append(event)
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host._emit = _emit # type: ignore[method-assign]
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await start_runtime(host._bundle)
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try:
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should_continue = await host._apply_select_command("theme", "default")
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finally:
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await close_runtime(host._bundle)
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assert should_continue is True
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user_event = next(item for item in events if item.type == "transcript_item" and item.item and item.item.role == "user")
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assert user_event.item.text == "/theme"
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@pytest.mark.asyncio
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async def test_backend_host_apply_provider_select_command_shows_single_segment_transcript(tmp_path, monkeypatch):
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monkeypatch.chdir(tmp_path)
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monkeypatch.setenv("OPENHARNESS_CONFIG_DIR", str(tmp_path / "config"))
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monkeypatch.setenv("OPENHARNESS_DATA_DIR", str(tmp_path / "data"))
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host = ReactBackendHost(BackendHostConfig(api_client=StaticApiClient("unused")))
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host._bundle = await build_runtime(api_client=StaticApiClient("unused"))
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events = []
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async def _emit(event):
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events.append(event)
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host._emit = _emit # type: ignore[method-assign]
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await start_runtime(host._bundle)
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try:
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should_continue = await host._apply_select_command("provider", "claude-api")
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finally:
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await close_runtime(host._bundle)
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assert should_continue is True
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user_event = next(item for item in events if item.type == "transcript_item" and item.item and item.item.role == "user")
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assert user_event.item.text == "/provider"
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