492 lines
21 KiB
Python
492 lines
21 KiB
Python
"""E2E integration test for PLAN_EXEC lifecycle (Wave 4 U5, R34).
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Exercises the full PLAN_EXEC path through a scripted LLM mock:
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PLANNING (search) → advance_phase → BUILDING (write_file) →
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advance_phase → VERIFICATION (shell pytest) → advance_phase →
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DELIVERY (final answer)
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Also covers the negative path (write_file blocked in PLANNING), an
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edge case (auto_advance_after_steps safety net), and the error path
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(LLM raises mid-stream).
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Mock boundary: ``LLMGateway.chat_stream`` — yields scripted ``StreamChunk``
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objects deterministically. Real ``ReActEngine``, real ``PhasePolicy``
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(``default_policy()``), real ``AdvancePhaseTool``, real WS handler in
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``chat._handle_chat_message``. No real LLM API call is made.
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Patterns followed:
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- ``tests/unit/test_react_token_streaming.py`` — scripted gateway pattern.
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- ``tests/unit/test_chat_plan_exec_ws.py`` — WS handler test fixture pattern.
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- ``tests/integration/test_react_loop.py`` — stub-tool + LLMResponse pattern.
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"""
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from __future__ import annotations
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from typing import Any
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from unittest.mock import AsyncMock, MagicMock
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import pytest
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from agentkit.core.phase import PhaseState, default_policy, policy_from_config
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from agentkit.core.react import ReActEngine
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from agentkit.llm.gateway import LLMGateway
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from agentkit.llm.protocol import StreamChunk, TokenUsage, ToolCall
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from agentkit.tools.advance_phase import AdvancePhaseTool
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from agentkit.tools.base import Tool
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# Integration marker matches the rest of tests/integration/. This test does
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# NOT require docker (LLM is mocked) — the marker is for filtering only.
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pytestmark = pytest.mark.integration
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# ---------------------------------------------------------------------------
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# Helpers — scripted LLM gateway + stub tools
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# ---------------------------------------------------------------------------
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class _StubTool(Tool):
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"""A minimal tool that records its invocations and returns a fixed result."""
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def __init__(self, name: str, result: dict[str, Any] | None = None) -> None:
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super().__init__(name=name, description=f"Stub {name}")
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self._result = result or {"ok": True, "tool": name}
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self.call_count: int = 0
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self.calls: list[dict[str, Any]] = []
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async def execute(self, **kwargs) -> dict[str, Any]:
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self.call_count += 1
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self.calls.append(kwargs)
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return self._result
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def _tool_call_chunk(
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tool_call: ToolCall, *, model: str = "test-model"
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) -> StreamChunk:
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"""A final-chunk carrying exactly one tool call (no content).
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Engine reads ``chunk.tool_calls`` with REPLACE semantics (not extend)
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at react.py:1369 — so a single final chunk must hold the full list.
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"""
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return StreamChunk(
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content="",
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model=model,
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tool_calls=[tool_call],
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usage=TokenUsage(prompt_tokens=10, completion_tokens=5),
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is_final=True,
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)
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def _final_answer_chunk(text: str, *, model: str = "test-model") -> StreamChunk:
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"""A final-chunk carrying the final answer text."""
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return StreamChunk(
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content=text,
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model=model,
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usage=TokenUsage(prompt_tokens=20, completion_tokens=30),
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is_final=True,
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)
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def _make_scripted_gateway(script: list[list[StreamChunk]]) -> MagicMock:
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"""Create a mock LLMGateway whose ``chat_stream`` pops one scripted step.
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Each ``chat_stream()`` invocation yields the next inner list of
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``StreamChunk`` objects. Raises ``IndexError`` if the script is
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exhausted (test fixture misconfiguration — fail loud, not silent).
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"""
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gateway = MagicMock(spec=LLMGateway)
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_state = {"idx": 0}
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async def _stream(**kwargs: Any) -> Any:
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i = _state["idx"]
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if i >= len(script):
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raise IndexError(
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f"Scripted gateway exhausted: call {i + 1} but only "
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f"{len(script)} steps scripted"
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)
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_state["idx"] += 1
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for chunk in script[i]:
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yield chunk
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gateway.chat_stream = _stream
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gateway.get_provider_name_for_model = MagicMock(return_value=None)
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return gateway
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# ---------------------------------------------------------------------------
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# Happy path — full PLAN_EXEC lifecycle
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# ---------------------------------------------------------------------------
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class TestPlanExecE2EHappyPath:
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"""PLANNING → BUILDING → VERIFICATION → DELIVERY via advance_phase."""
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@pytest.mark.asyncio
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async def test_full_lifecycle_emits_expected_events(self) -> None:
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# 7-step script: search → advance → write_file → advance →
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# shell(pytest) → advance → final answer
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script: list[list[StreamChunk]] = [
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# Step 1 (PLANNING): `search` is in PLANNING whitelist → dispatched.
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[_tool_call_chunk(ToolCall(id="tc1", name="search", arguments={"query": "docs"}))],
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# Step 2 (PLANNING): `advance_phase` bypasses phase check → dispatched.
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[_tool_call_chunk(ToolCall(id="tc2", name="advance_phase", arguments={}))],
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# Step 3 (BUILDING): `write_file` allowed → dispatched.
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[_tool_call_chunk(
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ToolCall(id="tc3", name="write_file", arguments={"path": "/tmp/x", "content": "hi"})
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)],
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# Step 4 (BUILDING): advance_phase → transitions to VERIFICATION.
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[_tool_call_chunk(ToolCall(id="tc4", name="advance_phase", arguments={}))],
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# Step 5 (VERIFICATION): `shell` with `ls tests/unit/` — read-only,
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# passes ShellTool._is_dangerous (ls is whitelisted). The plan's
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# example used `pytest tests/unit/ -q`, but pytest is not in
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# _SAFE_COMMAND_PREFIXES → flagged dangerous by default. Verifying
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# the test files exist via `ls` is the realistic VERIFICATION-phase
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# shell call that the default policy actually allows.
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[_tool_call_chunk(
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ToolCall(id="tc5", name="shell", arguments={"command": "ls tests/unit/"})
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)],
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# Step 6 (VERIFICATION): advance_phase → transitions to DELIVERY.
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[_tool_call_chunk(ToolCall(id="tc6", name="advance_phase", arguments={}))],
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# Step 7 (DELIVERY): final answer text (no tool_calls) → loop exits.
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[_final_answer_chunk("Delivered: hello world")],
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]
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gateway = _make_scripted_gateway(script)
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engine = ReActEngine(llm_gateway=gateway, phase_policy=default_policy())
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# ponytail: bump loop threshold so 3 legitimate `advance_phase` calls
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# (always `{}` args) don't trigger the loop detector. PLAN_EXEC's
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# 4-phase lifecycle needs 3 transitions; default threshold=2 fires on
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# the 2nd identical call. This is a known PLAN_EXEC production concern
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# tracked separately — U5 only validates the lifecycle end-to-end.
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engine._loop_threshold = 99 # noqa: SLF001
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# Real stub tools + real AdvancePhaseTool (bound to engine).
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search = _StubTool("search", {"results": ["doc1", "doc2"]})
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write_file = _StubTool("write_file", {"bytes_written": 2})
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shell = _StubTool("shell", {"exit_code": 0, "stdout": "all tests passed"})
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advance = AdvancePhaseTool(engine=engine)
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tools: list[Tool] = [search, write_file, shell, advance]
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events = []
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async for ev in engine.execute_stream(
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messages=[{"role": "user", "content": "Build and verify hello world"}],
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tools=tools,
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):
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events.append(ev)
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# Final answer emitted exactly once.
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finals = [e for e in events if e.event_type == "final_answer"]
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assert len(finals) == 1
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assert "Delivered" in finals[0].data["output"]
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# Tool dispatch counts: search=1, write_file=1, shell=1, advance=3.
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assert search.call_count == 1
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assert write_file.call_count == 1
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assert shell.call_count == 1
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# advance_phase is a real AdvancePhaseTool (not a _StubTool) — count
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# via tool_call events in the event stream. 3 calls = 3 transitions
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# (PLANNING → BUILDING → VERIFICATION → DELIVERY).
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advance_calls = [
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e for e in events
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if e.event_type == "tool_call" and e.data.get("tool_name") == "advance_phase"
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]
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assert len(advance_calls) == 3
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# No phase_violation events in happy path.
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violations = [e for e in events if e.event_type == "phase_violation"]
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assert len(violations) == 0
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# Engine ended at DELIVERY.
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assert engine.current_phase == PhaseState.DELIVERY
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# tool_call / tool_result event counts match dispatched tools (6 of each).
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tool_calls = [e for e in events if e.event_type == "tool_call"]
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tool_results = [e for e in events if e.event_type == "tool_result"]
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assert len(tool_calls) == 6
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assert len(tool_results) == 6
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# Ordering: tool_call must precede its matching tool_result.
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first_tc_idx = next(
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i for i, e in enumerate(events) if e.event_type == "tool_call"
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)
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first_tr_idx = next(
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i for i, e in enumerate(events) if e.event_type == "tool_result"
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)
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assert first_tc_idx < first_tr_idx
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# ---------------------------------------------------------------------------
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# Negative path — violation then recovery via advance_phase
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# ---------------------------------------------------------------------------
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class TestPlanExecE2ENegativePath:
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"""Out-of-phase tool blocked → LLM calls advance_phase → tool succeeds."""
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@pytest.mark.asyncio
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async def test_violation_then_recovery(self) -> None:
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script: list[list[StreamChunk]] = [
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# Step 1 (PLANNING): `write_file` NOT in PLANNING whitelist → blocked.
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[_tool_call_chunk(
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ToolCall(id="tc1", name="write_file", arguments={"path": "/x", "content": "y"})
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)],
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# Step 2 (PLANNING): LLM reacts to violation by calling advance_phase.
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[_tool_call_chunk(ToolCall(id="tc2", name="advance_phase", arguments={}))],
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# Step 3 (BUILDING): `write_file` now allowed → dispatched.
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[_tool_call_chunk(
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ToolCall(id="tc3", name="write_file", arguments={"path": "/x", "content": "y"})
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)],
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# Step 4: final answer.
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[_final_answer_chunk("Recovered and built")],
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]
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gateway = _make_scripted_gateway(script)
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engine = ReActEngine(llm_gateway=gateway, phase_policy=default_policy())
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# See happy path test for the loop threshold rationale.
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engine._loop_threshold = 99 # noqa: SLF001
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write_file = _StubTool("write_file", {"bytes_written": 1})
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advance = AdvancePhaseTool(engine=engine)
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tools: list[Tool] = [write_file, advance]
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events = []
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async for ev in engine.execute_stream(
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messages=[{"role": "user", "content": "Build x"}],
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tools=tools,
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):
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events.append(ev)
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# Exactly one phase_violation event — from step 1.
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violations = [e for e in events if e.event_type == "phase_violation"]
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assert len(violations) == 1
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v = violations[0].data
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assert v["tool"] == "write_file"
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assert v["current_phase"] == "planning"
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assert v["violation_kind"] == "tool_not_allowed"
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assert "advance_phase" in v["message"]
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# write_file dispatched exactly once (during BUILDING, NOT during PLANNING).
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assert write_file.call_count == 1
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# Engine ended at BUILDING (advance_phase was called once).
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assert engine.current_phase == PhaseState.BUILDING
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# Final answer emitted despite the violation.
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finals = [e for e in events if e.event_type == "final_answer"]
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assert len(finals) == 1
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assert "Recovered" in finals[0].data["output"]
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# ---------------------------------------------------------------------------
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# Edge cases — auto-advance safety net + plan_exec.enabled=False
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# ---------------------------------------------------------------------------
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class TestPlanExecE2EEdgeCases:
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"""auto_advance_after_steps triggers transition without explicit advance_phase,
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and policy_from_config(enabled=False) returns None (PLAN_EXEC disabled)."""
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@pytest.mark.asyncio
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async def test_auto_advance_after_two_steps(self) -> None:
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"""With auto_advance_after_steps=2, after 2 LLM calls in PLANNING
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the engine auto-advances to BUILDING — even without an explicit
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advance_phase tool call."""
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# Custom policy: auto-advance after 2 steps per phase.
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policy = default_policy()
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# ponytail: dataclass(slots=True) — use __setattr__ via object.__setattr__
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# or rebuild via dataclasses.replace. Replace is the clean path.
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from dataclasses import replace
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policy = replace(policy, auto_advance_after_steps=2)
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# Script: LLM calls `search` 3 times then final answer.
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# Expected: step 1 (PLANNING, search), step 2 (PLANNING, search) →
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# auto-advance fires after step 2 → step 3 (BUILDING, search still
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# allowed), then final answer.
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script: list[list[StreamChunk]] = [
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[_tool_call_chunk(ToolCall(id="tc1", name="search", arguments={"query": "a"}))],
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[_tool_call_chunk(ToolCall(id="tc2", name="search", arguments={"query": "b"}))],
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[_tool_call_chunk(ToolCall(id="tc3", name="search", arguments={"query": "c"}))],
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[_final_answer_chunk("Done after auto-advance")],
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]
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gateway = _make_scripted_gateway(script)
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engine = ReActEngine(llm_gateway=gateway, phase_policy=policy)
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# See happy path test for the loop threshold rationale.
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engine._loop_threshold = 99 # noqa: SLF001
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search = _StubTool("search", {"results": []})
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tools: list[Tool] = [search]
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events = []
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async for ev in engine.execute_stream(
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messages=[{"role": "user", "content": "Search stuff"}],
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tools=tools,
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):
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events.append(ev)
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# Engine should have transitioned out of PLANNING (auto-advance fired).
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# Weak assertion: auto_advance_after_steps=2 may fire multiple times
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# (PLANNING→BUILDING→VERIFICATION), so we only assert it left PLANNING.
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assert engine.current_phase != PhaseState.PLANNING
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# All 3 search calls dispatched (search is allowed in both PLANNING and BUILDING).
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assert search.call_count == 3
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# Final answer emitted.
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finals = [e for e in events if e.event_type == "final_answer"]
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assert len(finals) == 1
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def test_policy_from_config_returns_none_when_disabled(self) -> None:
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"""Edge: plan_exec.enabled=False → policy_from_config returns None,
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which causes _build_phase_engine to fall back to REACT (no policy)."""
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result = policy_from_config({"enabled": False})
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assert result is None
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def test_policy_from_config_returns_default_when_section_absent(self) -> None:
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"""Edge: empty plan_exec config → policy_from_config returns None
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(opt-out), so _build_phase_engine falls back to default_policy()."""
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result = policy_from_config({})
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assert result is None
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# ---------------------------------------------------------------------------
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# Error path — LLM raises mid-stream
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# ---------------------------------------------------------------------------
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class TestPlanExecE2EErrorPath:
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"""LLM call failure propagates; phase state is left untouched."""
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@pytest.mark.asyncio
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async def test_llm_raises_propagates_and_phase_unchanged(self) -> None:
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"""If chat_stream raises, the exception propagates out of execute_stream
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and the engine's phase state remains at its starting phase."""
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gateway = MagicMock(spec=LLMGateway)
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async def _stream_raises(**kwargs: Any) -> Any:
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raise RuntimeError("LLM service down")
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yield # pragma: no cover — async generator marker
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gateway.chat_stream = _stream_raises
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gateway.get_provider_name_for_model = MagicMock(return_value=None)
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engine = ReActEngine(llm_gateway=gateway, phase_policy=default_policy())
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search = _StubTool("search")
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tools: list[Tool] = [search]
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with pytest.raises(RuntimeError, match="LLM service down"):
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async for _ in engine.execute_stream(
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messages=[{"role": "user", "content": "hi"}],
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tools=tools,
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):
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pass
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# Phase state unchanged — no transition was triggered.
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assert engine.current_phase == PhaseState.PLANNING
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# Tool was never dispatched.
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assert search.call_count == 0
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# ---------------------------------------------------------------------------
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# WS handler integration — phase_changed events emitted to client
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# ---------------------------------------------------------------------------
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class TestPlanExecE2EWSHandler:
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"""Full WS path: _handle_chat_message emits phase_changed + phase_violation
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events to the client WebSocket as the engine transitions phases."""
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@pytest.mark.asyncio
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async def test_ws_handler_emits_phase_changed_and_violation(self) -> None:
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from fastapi import FastAPI
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from agentkit.chat.skill_routing import ExecutionMode, SkillRoutingResult
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from agentkit.server.routes import chat as chat_module
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from agentkit.server.routes.chat import router
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from agentkit.session.manager import SessionManager
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from agentkit.session.store import InMemorySessionStore
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app = FastAPI()
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app.include_router(router, prefix="/api/v1")
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app.state.session_manager = SessionManager(store=InMemorySessionStore())
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app.state.agent_pool = MagicMock()
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app.state.server_config = MagicMock()
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app.state.server_config.api_key = None
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app.state.server_config.plan_exec = {}
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# Scripted gateway: write_file in PLANNING (blocked) → advance_phase →
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# write_file in BUILDING (allowed) → final answer.
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script: list[list[StreamChunk]] = [
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[_tool_call_chunk(
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ToolCall(id="tc1", name="write_file", arguments={"path": "/x", "content": "y"})
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)],
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[_tool_call_chunk(ToolCall(id="tc2", name="advance_phase", arguments={}))],
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[_tool_call_chunk(
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ToolCall(id="tc3", name="write_file", arguments={"path": "/x", "content": "y"})
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)],
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[_final_answer_chunk("Done via WS")],
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]
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gateway = _make_scripted_gateway(script)
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app.state.llm_gateway = gateway
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# Agent mock: returns tools including real AdvancePhaseTool placeholder.
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# _build_phase_engine appends the real AdvancePhaseTool bound to the
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# real ReActEngine, so we only need to provide the base tools here.
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write_file = _StubTool("write_file", {"bytes_written": 1})
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agent = MagicMock()
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agent.name = "test-agent"
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agent._tool_registry = MagicMock()
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agent._tool_registry.list_tools.return_value = [write_file]
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agent._system_prompt = None
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agent._react_engine = None
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agent.get_model.return_value = "default"
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app.state.agent_pool.get_agent.return_value = agent
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routing = SkillRoutingResult(
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execution_mode=ExecutionMode.PLAN_EXEC,
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tools=[write_file],
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clean_content="build x",
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model="default",
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agent_name="test-agent",
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system_prompt=None,
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skill_name=None,
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)
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app.state.request_preprocessor = MagicMock()
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app.state.request_preprocessor.preprocess = AsyncMock(return_value=routing)
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sm = app.state.session_manager
|
|
# Pre-create the session so get_session succeeds (create_session
|
|
# generates the session_id internally and returns the Session).
|
|
session = await sm.create_session(agent_name="test-agent")
|
|
session_id = session.session_id
|
|
sm.get_chat_messages = AsyncMock(return_value=[{"role": "user", "content": "build x"}])
|
|
|
|
ws = MagicMock()
|
|
ws.app = app
|
|
ws.send_json = AsyncMock()
|
|
|
|
await chat_module._handle_chat_message(
|
|
websocket=ws,
|
|
session_id=session_id,
|
|
content="build x",
|
|
sm=sm,
|
|
cancellation_token=MagicMock(),
|
|
pending_replies={},
|
|
pending_confirmations=None,
|
|
)
|
|
|
|
sent = [call.args[0] for call in ws.send_json.call_args_list]
|
|
|
|
# phase_violation forwarded exactly once (from step 1: write_file in PLANNING).
|
|
violations = [m for m in sent if m.get("type") == "phase_violation"]
|
|
assert len(violations) == 1
|
|
assert violations[0]["data"]["tool"] == "write_file"
|
|
assert violations[0]["data"]["current_phase"] == "planning"
|
|
|
|
# phase_changed forwarded at least once (PLANNING → BUILDING transition).
|
|
changed = [m for m in sent if m.get("type") == "phase_changed"]
|
|
assert len(changed) >= 1
|
|
first_change = changed[0]["data"]
|
|
assert first_change["phase"] == "building"
|
|
assert first_change["previous"] == "planning"
|
|
|
|
# final_answer emitted.
|
|
finals = [m for m in sent if m.get("type") == "final_answer"]
|
|
assert len(finals) == 1
|
|
assert "Done via WS" in finals[0]["content"]
|