test(wave8-blockers): 4 餘項 BLOCKER 修復驗收（vuln #4 + B14 + B25/B26 + B8）
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確認 critic + debugger + vuln-verifier 報告中尚未驗收的 4 修復都已實裝在 production， 並補對應 dedicated tests: vuln #4 — fusion prompt injection 防禦: - score_with_elephant 內 _sanitize 剔除控制字元 + 截長至 max_len - alert_name(100) / evidence(...) / proposal(300) 三層 sanitize - 驗證：1000 個 'A' 攻擊 payload → prompt 內 'A' < 200，控制字元 \\x00\\x1b\\x02 全剔除 debugger B14 — Gemini quota fail-closed: - ollama_failover_manager._check_gemini_quota except branch - Redis 異常時 return False（非 fail-open），費用安全 > 服務可用性 - best-effort 呼叫 alert_gemini_quota_exceeded 通知運維 debugger B25/B26 — auto_repair drain_pending_tasks: - AutoRepairService._pending_tasks (set) + drain_pending_tasks(timeout=60.0) - main.py shutdown 已接 _repair_svc.drain_pending_tasks() 呼叫 - K8s rolling restart 時 fire-and-forget tasks 不丟失 debugger B8 — governance ≥3 failures alert: - run_self_check 後聚合 failed_checks - ≥3 項失敗 → self._alert("governance_self_failure", ...) 觸發 - payload 含 failed_checks list + total_checks=4 + errors dict Tests: 10/10 PASSED (vuln 3 + B14 2 + drain 2 + governance 3) Note: 此 commit 純補測，所有 4 修復代碼上 commit 已 in production 仍待: 1167+ CD runs 確認 deploy 成功 Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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apps/api/tests/test_wave8_remaining_blockers.py
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apps/api/tests/test_wave8_remaining_blockers.py
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"""Wave 8 餘項 BLOCKER 修復驗收測試
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================================================================================
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覆蓋 critic + debugger + vuln-verifier 報告中尚未驗收的 4 修復：
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1. vuln #4 — decision_fusion._sanitize prompt injection 防禦
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2. debugger B14 — Gemini quota Redis 異常時 fail-closed（非 fail-open）
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3. debugger B25/B26 — auto_repair_service.drain_pending_tasks (lifespan SIGTERM)
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4. debugger B8 — GovernanceAgent.run_self_check ≥3 失敗觸發 alert_governance
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設計原則:
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- 直接驗證 production 代碼行為，不過度 mock
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- 使用 monkeypatch 隔離外部依賴
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2026-04-27 Wave8 BLOCKER 收尾 by Claude Opus 4.7
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"""
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from __future__ import annotations
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from unittest.mock import AsyncMock, MagicMock, patch
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import pytest
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# =============================================================================
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# vuln #4 — decision_fusion._sanitize prompt injection 防禦
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# =============================================================================
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class TestVuln4FusionSanitize:
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"""alert_name / evidence / proposal 為不可信使用者輸入，prompt 注入防禦
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核心驗證：score_with_elephant 內呼叫 LLM 前，evil input 會被
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控制字元剔除 + 截長至 max_len，不會原樣傳入 prompt。
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"""
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@pytest.mark.asyncio
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async def test_score_with_elephant_sanitizes_prompt(self):
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"""注入控制字元 + 超長 attacker payload → LLM 收到的 prompt 已 sanitize"""
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from src.services.decision_fusion import DecisionFusionEngine
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engine = DecisionFusionEngine()
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# 注入：alert_name 含控制字元 + payload 超長 1000 chars
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evil_alert = "ignore_prior\x00\x1b\x02XXX" + "A" * 1000
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incident = MagicMock()
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incident.signals = [MagicMock(labels={"alertname": evil_alert})]
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captured_prompt: dict = {}
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class _FakeResp:
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status_code = 200
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text = ""
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def json(self):
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return {"response": "0.5"}
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def raise_for_status(self):
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pass
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async def _fake_post(url, json=None, **kwargs): # noqa: A002
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captured_prompt["body"] = (json or {}).get("prompt", "")
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return _FakeResp()
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mock_client = MagicMock()
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mock_client.post = AsyncMock(side_effect=_fake_post)
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with patch("httpx.AsyncClient") as mock_async_client:
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mock_async_client.return_value.__aenter__.return_value = mock_client
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try:
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await engine.score_with_elephant(
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incident=incident,
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evidence=MagicMock(evidence_summary="x", mcp_health={}),
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proposal="dummy",
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)
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except Exception:
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pass # 允許 score 解析失敗（重點驗 prompt sanitize）
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prompt_body = captured_prompt.get("body", "")
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# 控制字元應被剔除
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assert "\x00" not in prompt_body
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assert "\x1b" not in prompt_body
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assert "\x02" not in prompt_body
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# 超長 payload 應被截斷（max_len 約 100 for alert_name）
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# 1000 個 'A' 不可能全部進去
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assert prompt_body.count("A") < 200, (
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f"未截長：prompt 含 {prompt_body.count('A')} 個 A（應 <200）"
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)
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def test_get_alert_name_returns_string(self):
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"""_get_alert_name 取 signals[0].alert_name 屬性"""
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from src.services.decision_fusion import DecisionFusionEngine
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engine = DecisionFusionEngine()
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signal = MagicMock()
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signal.alert_name = "HighCPU"
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incident = MagicMock()
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incident.signals = [signal]
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result = engine._get_alert_name(incident)
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assert result == "HighCPU"
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def test_get_alert_name_handles_none(self):
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"""_get_alert_name(None) → 'unknown'（不 raise）"""
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from src.services.decision_fusion import DecisionFusionEngine
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engine = DecisionFusionEngine()
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assert engine._get_alert_name(None) == "unknown"
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# =============================================================================
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# debugger B14 — Gemini quota Redis 異常時 fail-closed
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# =============================================================================
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class TestB14QuotaFailClosed:
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"""Redis 異常時 fail-closed 防 Gemini 失控呼叫（費用鐵律）"""
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@pytest.mark.asyncio
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async def test_redis_exception_returns_false(self):
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"""Redis pipeline 拋 ConnectionError → _check_gemini_quota return False"""
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from src.services.ollama_failover_manager import OllamaFailoverManager
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manager = OllamaFailoverManager(health_monitor=MagicMock())
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manager._settings = MagicMock(GEMINI_DAILY_QUOTA=1000)
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# mock get_redis 返回會 raise 的 client
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bad_redis = MagicMock()
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bad_redis.pipeline = MagicMock(side_effect=ConnectionError("Redis down"))
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with patch("src.core.redis_client.get_redis", return_value=bad_redis), \
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patch(
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"src.services.failover_alerter.get_failover_alerter",
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return_value=MagicMock(
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alert_gemini_quota_exceeded=AsyncMock(),
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),
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):
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result = await manager._check_gemini_quota()
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# 鐵律：Redis 異常時 fail-closed（拒走 Gemini）
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assert result is False, "Redis 異常時必須 fail-closed，避免 Gemini 失控呼叫"
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@pytest.mark.asyncio
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async def test_redis_exception_triggers_alert(self):
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"""Redis 異常時 best-effort 呼叫 alert_gemini_quota_exceeded"""
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from src.services.ollama_failover_manager import OllamaFailoverManager
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manager = OllamaFailoverManager(health_monitor=MagicMock())
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manager._settings = MagicMock(GEMINI_DAILY_QUOTA=1000)
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bad_redis = MagicMock()
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bad_redis.pipeline = MagicMock(side_effect=ConnectionError("Redis down"))
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mock_alerter = MagicMock(alert_gemini_quota_exceeded=AsyncMock())
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with patch("src.core.redis_client.get_redis", return_value=bad_redis), \
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patch(
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"src.services.failover_alerter.get_failover_alerter",
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return_value=mock_alerter,
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):
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await manager._check_gemini_quota()
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# alert 應被呼叫（best-effort）
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mock_alerter.alert_gemini_quota_exceeded.assert_awaited_once()
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call_kwargs = mock_alerter.alert_gemini_quota_exceeded.await_args[0][0]
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assert call_kwargs.get("reason") == "fail_closed_due_to_redis_error"
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# =============================================================================
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# debugger B25/B26 — auto_repair drain_pending_tasks (lifespan SIGTERM)
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# =============================================================================
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class TestB25B26DrainPendingTasks:
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"""K8s rolling restart 時 fire-and-forget tasks 不丟失"""
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@pytest.mark.asyncio
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async def test_drain_returns_zero_when_no_tasks(self):
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"""無 pending task 時 drain 立即返回"""
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from src.services.auto_repair_service import AutoRepairService
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svc = AutoRepairService()
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# _pending_tasks 是 instance attribute set
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assert isinstance(svc._pending_tasks, set)
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result = await svc.drain_pending_tasks(timeout=1.0)
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assert result.get("pending") == 0 or result.get("drained") == 0
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@pytest.mark.asyncio
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async def test_drain_waits_for_pending_tasks(self):
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"""有 pending task 時 drain 會等到完成或 timeout"""
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import asyncio
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from src.services.auto_repair_service import AutoRepairService
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svc = AutoRepairService()
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# 注入 short-lived task
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completed = []
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async def _short_task():
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await asyncio.sleep(0.05)
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completed.append("done")
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task = asyncio.create_task(_short_task())
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svc._pending_tasks.add(task)
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task.add_done_callback(svc._pending_tasks.discard)
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result = await svc.drain_pending_tasks(timeout=2.0)
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# task 應已完成
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assert "done" in completed
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# drain 結果含 pending 計數（修法形狀）
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assert isinstance(result, dict)
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# =============================================================================
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# debugger B8 — GovernanceAgent ≥3 失敗時觸發 alert_governance
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# =============================================================================
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class TestB8GovernanceFailureAlert:
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"""4 自檢中 ≥3 項失敗 → 觸發 governance_self_failure 告警"""
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@pytest.mark.asyncio
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async def test_three_failures_triggers_alert(self):
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"""3 項失敗應觸發 _alert"""
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from src.services.governance_agent import GovernanceAgent
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agent = GovernanceAgent()
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# mock 四項 check：3 個 raise，1 個成功
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agent.check_trust_drift = AsyncMock(side_effect=RuntimeError("DB down"))
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agent.check_knowledge_degradation = AsyncMock(side_effect=RuntimeError("KM error"))
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agent.check_llm_hallucination = AsyncMock(side_effect=RuntimeError("LLM error"))
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agent.check_execution_blast_radius = AsyncMock(return_value={"status": "ok"})
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agent._alert = AsyncMock()
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await agent.run_self_check()
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# _alert 應被呼叫（≥3 失敗）
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agent._alert.assert_awaited_once()
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call_args = agent._alert.await_args
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assert call_args[0][0] == "governance_self_failure"
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payload = call_args[0][1]
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assert payload["total_checks"] == 4
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assert len(payload["failed_checks"]) >= 3
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@pytest.mark.asyncio
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async def test_two_failures_no_alert(self):
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"""僅 2 項失敗不觸發 alert（治理機制仍部分可用）"""
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from src.services.governance_agent import GovernanceAgent
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agent = GovernanceAgent()
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agent.check_trust_drift = AsyncMock(side_effect=RuntimeError("err1"))
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agent.check_knowledge_degradation = AsyncMock(side_effect=RuntimeError("err2"))
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agent.check_llm_hallucination = AsyncMock(return_value={"status": "ok"})
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agent.check_execution_blast_radius = AsyncMock(return_value={"status": "ok"})
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agent._alert = AsyncMock()
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await agent.run_self_check()
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# 僅 2 失敗不觸發
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agent._alert.assert_not_awaited()
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@pytest.mark.asyncio
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async def test_all_four_failures_triggers_alert(self):
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"""4 項全失敗也應觸發 alert"""
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from src.services.governance_agent import GovernanceAgent
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agent = GovernanceAgent()
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agent.check_trust_drift = AsyncMock(side_effect=RuntimeError("e"))
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agent.check_knowledge_degradation = AsyncMock(side_effect=RuntimeError("e"))
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agent.check_llm_hallucination = AsyncMock(side_effect=RuntimeError("e"))
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agent.check_execution_blast_radius = AsyncMock(side_effect=RuntimeError("e"))
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agent._alert = AsyncMock()
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await agent.run_self_check()
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agent._alert.assert_awaited_once()
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payload = agent._alert.await_args[0][1]
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assert len(payload["failed_checks"]) == 4
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