Files
Stirling-PDF/engine/tests/agents/test_pdf_review.py
T
2026-05-01 10:19:38 +01:00

217 lines
8.5 KiB
Python

"""Tests for ``PdfReviewAgent``.
LLM-localised text is the consumer's responsibility (verified by mocking
the localiser agent), but the deterministic placement geometry —
anchor-text selection, per-page stacking, fallback right-margin — is pure
Python and worth pinning here.
"""
from __future__ import annotations
import json
from dataclasses import dataclass
from unittest.mock import AsyncMock, patch
import pytest
from stirling.agents.pdf_review import (
_LOCALISER_SYSTEM_PROMPT,
PdfReviewAgent,
_LocalisedComment,
_LocalisedVerdict,
)
from stirling.contracts import EditPlanResponse, OrchestratorRequest, SupportedCapability
from stirling.contracts.ledger import Discrepancy, DiscrepancyKind, Severity, Verdict
from stirling.models import ToolEndpoint
from stirling.models.agent_tool_models import AgentToolId, PdfCommentAgentParams
from stirling.services.runtime import AppRuntime
@dataclass
class _StubResult:
output: _LocalisedVerdict
def _make_verdict(discrepancies: list[Discrepancy]) -> Verdict:
return Verdict(
session_id="s1",
discrepancies=discrepancies,
pages_examined=[d.page for d in discrepancies] or [0],
rounds_taken=1,
summary="Test verdict.",
clean=not discrepancies,
)
def _discrepancy(page: int = 0, stated: str = "$215,000", context: str = "Total row") -> Discrepancy:
return Discrepancy(
page=page,
kind=DiscrepancyKind.TALLY,
severity=Severity.ERROR,
description="Column total is wrong.",
stated=stated,
expected="$215,500",
context=context,
)
def test_specs_prefer_stated_as_anchor_text() -> None:
verdict = _make_verdict([_discrepancy(stated="$215,000")])
localised = [_LocalisedComment(discrepancy_index=0, subject="Total mismatch", text="Off by $500.")]
specs = PdfReviewAgent._build_comment_specs(verdict, localised)
assert len(specs) == 1
assert specs[0].anchor_text == "$215,000"
def test_specs_fall_back_to_context_when_stated_missing() -> None:
verdict = _make_verdict(
[
_discrepancy(stated="", context="We grew 15% this year"),
]
)
localised = [_LocalisedComment(discrepancy_index=0, subject="Claim", text="Unverified.")]
specs = PdfReviewAgent._build_comment_specs(verdict, localised)
assert specs[0].anchor_text == "We grew 15% this year"
def test_specs_anchor_text_none_when_no_hints() -> None:
verdict = _make_verdict([_discrepancy(stated="", context="")])
localised = [_LocalisedComment(discrepancy_index=0, subject="Total wrong", text="Off by ten.")]
specs = PdfReviewAgent._build_comment_specs(verdict, localised)
assert specs[0].anchor_text is None
def test_specs_drop_out_of_range_indices() -> None:
verdict = _make_verdict([_discrepancy(page=0)]) # only one discrepancy, valid index is 0
localised = [
_LocalisedComment(discrepancy_index=0, subject="Real", text="Real comment."),
_LocalisedComment(discrepancy_index=99, subject="Hallucinated", text="Should be dropped."),
]
specs = PdfReviewAgent._build_comment_specs(verdict, localised)
assert len(specs) == 1
assert specs[0].text == "Real comment."
def test_specs_stack_per_page() -> None:
"""Multiple discrepancies on the same page should be vertically stacked
in the right margin (decreasing y) rather than overlapping."""
verdict = _make_verdict(
[
_discrepancy(page=0, stated="A"),
_discrepancy(page=0, stated="B"),
_discrepancy(page=1, stated="C"),
]
)
localised = [
_LocalisedComment(discrepancy_index=0, subject="s", text="t"),
_LocalisedComment(discrepancy_index=1, subject="s", text="t"),
_LocalisedComment(discrepancy_index=2, subject="s", text="t"),
]
specs = PdfReviewAgent._build_comment_specs(verdict, localised)
page0 = [s for s in specs if s.page_index == 0]
assert len(page0) == 2
assert page0[0].y > page0[1].y # stacked downward
page1 = [s for s in specs if s.page_index == 1]
assert page1[0].y == page0[0].y # first on a new page resets the stack
@pytest.mark.anyio
async def test_payload_serialises_anchor_text_as_camel_case(runtime: AppRuntime) -> None:
"""Java deserialises the comments JSON via record-component names, so the
keys must be camelCase (anchorText, pageIndex)."""
agent = PdfReviewAgent(runtime)
verdict = _make_verdict([_discrepancy(page=2, stated="110", context="Line 3")])
canned = _LocalisedVerdict(
comments=[_LocalisedComment(discrepancy_index=0, subject="Off by ten", text="Subtotal wrong.")],
)
with patch.object(agent._localiser_agent, "run", return_value=_StubResult(output=canned)):
payload_json = await agent._build_localised_comments_payload("flag math errors", verdict)
payload = json.loads(payload_json)
assert len(payload) == 1
assert payload[0]["anchorText"] == "110"
assert payload[0]["pageIndex"] == 2
assert payload[0]["text"] == "Subtotal wrong."
# ---------------------------------------------------------------------------
# orchestrate() — classifier-driven first-turn routing
# ---------------------------------------------------------------------------
@pytest.mark.anyio
async def test_orchestrate_classifier_true_emits_math_audit_plan(runtime: AppRuntime) -> None:
"""First turn — when the math-intent classifier says yes, emit a one-step plan
calling the math auditor with resume_with=PDF_REVIEW."""
agent = PdfReviewAgent(runtime)
request = OrchestratorRequest(user_message="vérifie les totaux", file_names=["report.pdf"])
with patch.object(agent._math_intent_classifier, "classify", AsyncMock(return_value=True)):
response = await agent.orchestrate(request)
assert isinstance(response, EditPlanResponse)
assert response.resume_with == SupportedCapability.PDF_REVIEW
assert len(response.steps) == 1
assert response.steps[0].tool == AgentToolId.MATH_AUDITOR_AGENT
@pytest.mark.anyio
async def test_orchestrate_classifier_false_routes_to_pdf_comment_agent(runtime: AppRuntime) -> None:
"""When the classifier says no math, delegate to pdf-comment-agent for prose review."""
agent = PdfReviewAgent(runtime)
request = OrchestratorRequest(
user_message="review the invoices for ambiguous wording",
file_names=["contract.pdf"],
)
with patch.object(agent._math_intent_classifier, "classify", AsyncMock(return_value=False)):
response = await agent.orchestrate(request)
assert isinstance(response, EditPlanResponse)
assert response.resume_with is None
assert len(response.steps) == 1
assert response.steps[0].tool == AgentToolId.PDF_COMMENT_AGENT
assert isinstance(response.steps[0].parameters, PdfCommentAgentParams)
assert response.steps[0].parameters.prompt == request.user_message
@pytest.mark.anyio
async def test_orchestrate_resume_uses_verdict_without_calling_classifier(
runtime: AppRuntime,
) -> None:
"""Resume turns are detected by Verdict-artifact presence and bypass the
classifier entirely (saves an LLM call when we already know the answer)."""
from stirling.contracts import MathAuditorToolReportArtifact
agent = PdfReviewAgent(runtime)
verdict = _make_verdict([_discrepancy(page=0, stated="$100")])
request = OrchestratorRequest(
user_message="flag math errors",
file_names=["report.pdf"],
artifacts=[MathAuditorToolReportArtifact(report=verdict)],
)
canned = _LocalisedVerdict(
comments=[_LocalisedComment(discrepancy_index=0, subject="Wrong", text="Off.")],
)
classifier_mock = AsyncMock(return_value=False)
with patch.object(agent._localiser_agent, "run", return_value=_StubResult(output=canned)):
with patch.object(agent._math_intent_classifier, "classify", classifier_mock):
response = await agent.orchestrate(request)
assert isinstance(response, EditPlanResponse)
assert response.resume_with is None
assert len(response.steps) == 1
assert response.steps[0].tool == ToolEndpoint.ADD_COMMENTS
classifier_mock.assert_not_called() # short-circuit on Verdict
# ---------------------------------------------------------------------------
# Prompt pinning — guard against accidental drift
# ---------------------------------------------------------------------------
def test_localiser_prompt_requires_verbatim_quoting() -> None:
"""If this prompt is rephrased and drops the verbatim rule, the LLM may
paraphrase numeric values like ``$215,000`` as 'about $215k'."""
assert "verbatim" in _LOCALISER_SYSTEM_PROMPT.lower()