cnbugs
224 lines
9.9 KiB
Python
224 lines
9.9 KiB
Python
import asyncio
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import unittest
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from unittest.mock import patch
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from backend.ai_agent import run_diagnostic_agent
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async def collect_events(stream):
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return [event async for event in stream]
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class DiagnosticAgentTest(unittest.TestCase):
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def test_executes_read_only_tool_and_returns_final_answer(self):
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responses = iter([
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'{"action":"command","command":"kubectl get pods -A","reason":"查看异常 Pod"}',
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'{"action":"final","analysis":"发现一个异常 Pod","verified":true,"remaining_issues":0}',
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])
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async def fake_completion(messages):
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return next(responses)
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async def fake_execute(command):
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return {"command": command, "mode": "read", "returncode": 0, "stdout": "pod-a Running", "stderr": ""}
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async def run():
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with patch("backend.ai_agent._complete_chat", fake_completion), patch("backend.ai_agent.execute_kubectl", fake_execute):
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return await collect_events(run_diagnostic_agent("report", max_steps=3))
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events = asyncio.run(run())
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self.assertEqual(
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[event["type"] for event in events],
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["command", "result", "thinking", "command", "result", "thinking", "final"],
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)
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self.assertEqual(events[3]["mode"], "read")
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self.assertEqual(events[-1]["content"], "发现一个异常 Pod")
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def test_pauses_mutating_command_for_human_approval(self):
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async def fake_completion(messages):
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return '{"action":"command","command":"kubectl rollout restart deployment/api -n prod","reason":"重启故障工作负载"}'
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async def run():
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with patch("backend.ai_agent._complete_chat", fake_completion):
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return await collect_events(run_diagnostic_agent("report", max_steps=3))
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events = asyncio.run(run())
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self.assertEqual(events[-1]["type"], "approval_required")
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self.assertEqual(events[-1]["command"], "kubectl rollout restart deployment/api -n prod")
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self.assertTrue(events[-1]["approval_id"])
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def test_manual_mode_never_executes_command_and_waits_for_result(self):
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async def fake_completion(messages):
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return '{"action":"command","command":"kubectl get pods -A","reason":"查看 Pod"}'
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async def run():
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with patch("backend.ai_agent._complete_chat", fake_completion), patch("backend.ai_agent.execute_kubectl") as execute:
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events = await collect_events(run_diagnostic_agent("report", max_steps=3, execution_mode="manual"))
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return events, execute
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events, execute = asyncio.run(run())
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execute.assert_not_called()
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self.assertEqual(events[-1]["type"], "manual_command")
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self.assertEqual(events[-1]["command"], "kubectl get pods -A")
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self.assertTrue(events[-1]["command_id"])
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def test_ai_mode_keeps_write_command_behind_approval(self):
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async def fake_completion(messages):
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return '{"action":"command","command":"kubectl delete pod api-0 -n prod","reason":"删除故障 Pod"}'
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executed = []
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async def run():
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async def fake_execute(command):
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executed.append(command)
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return {"command": command, "mode": "read", "returncode": 0, "stdout": "nodes ready", "stderr": ""}
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with patch("backend.ai_agent._complete_chat", fake_completion), patch("backend.ai_agent.execute_kubectl", fake_execute):
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return await collect_events(run_diagnostic_agent("report", max_steps=3, execution_mode="ai"))
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events = asyncio.run(run())
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self.assertEqual(executed, ["kubectl get nodes -o wide"])
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self.assertEqual(events[-1]["type"], "approval_required")
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def test_rejects_unknown_execution_mode(self):
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async def run():
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return await collect_events(run_diagnostic_agent("report", execution_mode="invalid"))
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events = asyncio.run(run())
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self.assertEqual(events[-1]["type"], "error")
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self.assertIn("执行模式", events[-1]["message"])
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def test_ai_mode_forces_initial_read_only_probe_before_model_planning(self):
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responses = iter([
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'{"action":"final","analysis":"根据采集结果完成分析","verified":true,"remaining_issues":0}',
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])
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async def fake_completion(messages):
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return next(responses)
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executed = []
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async def fake_execute(command):
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executed.append(command)
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return {"command": command, "mode": "read", "returncode": 0, "stdout": "node-a Ready", "stderr": ""}
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async def run():
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with patch("backend.ai_agent._complete_chat", fake_completion), patch("backend.ai_agent.execute_kubectl", fake_execute):
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return await collect_events(run_diagnostic_agent("report", max_steps=3, execution_mode="ai"))
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events = asyncio.run(run())
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self.assertEqual(executed, ["kubectl get nodes -o wide"])
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self.assertEqual([event["type"] for event in events[:2]], ["command", "result"])
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self.assertEqual(events[-1]["type"], "final")
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def test_parse_agent_action_accepts_markdown_json_fence(self):
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from backend.ai_agent import _parse_agent_action
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action = _parse_agent_action(
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'我将先检查 Pod。\n```json\n{"action":"command","command":"kubectl get pods -A","reason":"查看 Pod"}\n```'
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)
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self.assertEqual(action["action"], "command")
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self.assertEqual(action["command"], "kubectl get pods -A")
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def test_ai_mode_continues_beyond_six_commands_until_model_finishes(self):
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command_count = 8
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responses = iter([
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*[
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(
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'{"action":"command","command":"kubectl get pods -A '
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f'--field-selector metadata.name=pod-{index}","reason":"继续收集证据"}}'
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)
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for index in range(command_count)
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],
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'{"action":"final","analysis":"已完成根因分析","verified":true,"remaining_issues":0}',
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])
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executed = []
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async def fake_completion(messages):
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return next(responses)
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async def fake_execute(command):
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executed.append(command)
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return {"command": command, "mode": "read", "returncode": 0, "stdout": "evidence", "stderr": ""}
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async def run():
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with patch("backend.ai_agent._complete_chat", fake_completion), patch("backend.ai_agent.execute_kubectl", fake_execute):
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return await collect_events(run_diagnostic_agent("report", execution_mode="ai", max_steps=20))
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events = asyncio.run(run())
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self.assertEqual(len(executed), command_count + 1)
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self.assertEqual(events[-1]["type"], "final")
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self.assertEqual(events[-1]["content"], "已完成根因分析")
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self.assertNotIn("最大轮次", events[-1]["content"])
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def test_safety_limit_reports_agent_error_instead_of_sending_user_to_manual_diagnosis(self):
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async def fake_completion(messages):
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return '{"action":"command","command":"kubectl get pods -A","reason":"继续调查"}'
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async def fake_execute(command):
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return {"command": command, "mode": "read", "returncode": 0, "stdout": "same result", "stderr": ""}
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async def run():
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with patch("backend.ai_agent._complete_chat", fake_completion), patch("backend.ai_agent.execute_kubectl", fake_execute):
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return await collect_events(run_diagnostic_agent("report", execution_mode="ai", max_steps=2))
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events = asyncio.run(run())
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self.assertEqual(events[-1]["type"], "error")
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self.assertIn("安全上限", events[-1]["message"])
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self.assertNotIn("人工排查", events[-1]["message"])
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def test_agent_rejects_final_until_verification_reports_no_remaining_issues(self):
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responses = iter([
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'{"action":"final","analysis":"已经修复"}',
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'{"action":"command","command":"kubectl get pods -A","reason":"执行全量复检"}',
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'{"action":"final","analysis":"所有工作负载恢复正常","verified":true,"remaining_issues":0}',
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])
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executed = []
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async def fake_completion(messages):
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return next(responses)
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async def fake_execute(command):
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executed.append(command)
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stdout = "node-a Ready" if command == "kubectl get nodes -o wide" else "all pods Running"
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return {"command": command, "mode": "read", "returncode": 0, "stdout": stdout, "stderr": ""}
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async def run():
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with patch("backend.ai_agent._complete_chat", fake_completion), patch("backend.ai_agent.execute_kubectl", fake_execute):
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return await collect_events(run_diagnostic_agent("report", execution_mode="ai", max_steps=5))
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events = asyncio.run(run())
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self.assertEqual(executed, ["kubectl get nodes -o wide", "kubectl get pods -A"])
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self.assertEqual(events[-1]["type"], "final")
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self.assertTrue(events[-1]["verified"])
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self.assertEqual(events[-1]["remaining_issues"], 0)
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def test_parse_final_requires_explicit_verification_fields(self):
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from backend.ai_agent import _parse_agent_action
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with self.assertRaises(ValueError):
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_parse_agent_action('{"action":"final","analysis":"看起来正常"}')
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action = _parse_agent_action(
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'{"action":"final","analysis":"全部正常","verified":true,"remaining_issues":0}'
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)
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self.assertTrue(action["verified"])
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self.assertEqual(action["remaining_issues"], 0)
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def test_stops_when_model_returns_invalid_action(self):
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async def fake_completion(messages):
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return "not-json"
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async def run():
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with patch("backend.ai_agent._complete_chat", fake_completion):
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return await collect_events(run_diagnostic_agent("report", max_steps=3))
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events = asyncio.run(run())
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self.assertEqual(events[-1]["type"], "error")
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self.assertIn("JSON", events[-1]["message"])
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if __name__ == "__main__":
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unittest.main()
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