feat: add a retention script downstreams can schedule
The library only ever SELECTs/INSERTs into llm_calls (D15), so expiring rows has to live outside it — holding DELETE would contradict the REVOKE UPDATE, DELETE the deployment template recommends. tools/telemetry_retention.py is dry-run by default and prints the row count, the created_at window and the tenant_id spread so an operator can tell whether the rows about to go are the intended ones. The Postgres branch refuses partitioned targets with exit code 3 (DETACH/DROP PARTITION is O(1); DELETE is not) and otherwise deletes in per-batch transactions. Missing asyncpg exits 2 rather than degrading quietly: this is an ops tool, and a silent "0 rows" reads as "already clean". Exit codes are the contract with the scheduler, so argparse errors were moved off 2 (now 1) to keep "bad flags" distinguishable from "cannot reach the database". The Postgres cases run against the real instance in throwaway schemas — never public.llm_calls — and the batch case asserts the shared table's row count is unchanged, so a search_path that failed to apply lands as a red test instead of a deletion.
This commit is contained in:
@@ -0,0 +1,298 @@
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"""`tools/telemetry_retention.py` 的 PostgreSQL 分支测试(issue #12 Task 3,真实 PG)。
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DSN 走 .env `PGW_TELEMETRY_PG_DSN`,缺则 skip。
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隔离纪律(M4 事故教训): `public.llm_calls` 是与真实批跑共享的表,而本测试跑的是
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一个**会删数据的脚本**——一律在自建的临时 schema 里操作(DSN 挂 search_path),
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teardown 只 `DROP SCHEMA ... CASCADE`;分批删除那例另行断言 `public.llm_calls`
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的行数前后不变,把"search_path 没生效"这种最坏情况钉成红灯而不是静默删库。
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"""
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from __future__ import annotations
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import os
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import re
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import subprocess
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import sys
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from datetime import UTC, datetime, timedelta
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from pathlib import Path
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from uuid import uuid4
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import pytest
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from dotenv import dotenv_values
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from polygateway.telemetry.schema import PG_DDL
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_ROOT = Path(__file__).resolve().parents[2]
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_SCRIPT = _ROOT / "tools" / "telemetry_retention.py"
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_INSERT = (
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"INSERT INTO llm_calls (call_id, model, provider, source_name, messages, response, "
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"prompt_tokens, completion_tokens, usage_source, latency_ms, tenant_id, created_at) "
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"VALUES ($1, 'm', 'p', 's1', '[]', 'ok', 1, 2, 'measured', 10, $2, $3)"
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)
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def _partitioned_ddl() -> str:
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"""由库的真实 `PG_DDL` 派生一份 RANGE 分区版建表语句。
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不另抄一份 DDL: 抄的那份与库的 schema 必然漂移,而漂移后本测试验的就不再是
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"库建的表被做成分区后脚本认不认得"。两处改动都是分区表的**硬性要求**——
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分区表上的唯一约束必须包含分区键,故 `call_id` 单列主键不再合法。
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"""
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body, count = re.subn(
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r"call_id(\s+)TEXT PRIMARY KEY", r"call_id\1TEXT NOT NULL", PG_DDL, count=1
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)
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if count != 1:
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raise AssertionError("PG_DDL 的 call_id 主键声明形态已变,分区版 DDL 需同步")
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body = body.strip().rstrip(";").strip()
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if not body.endswith(")"):
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raise AssertionError("PG_DDL 结尾形态已变,分区版 DDL 需同步")
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return (
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f"{body[:-1].rstrip()},\n"
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" PRIMARY KEY (call_id, created_at)\n"
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") PARTITION BY RANGE (created_at)"
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)
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def _dsn_value() -> str | None:
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merged = {**dotenv_values(".env"), **os.environ}
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raw = merged.get("PGW_TELEMETRY_PG_DSN")
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if not raw:
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return None
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scheme, sep, rest = raw.partition("://")
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return f"{scheme.partition('+')[0]}{sep}{rest}"
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def _search_path_dsn(dsn: str, schema: str) -> str:
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sep = "&" if "?" in dsn else "?"
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return f"{dsn}{sep}options=-csearch_path%3D{schema}"
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def _stamp(delta: timedelta) -> datetime:
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return datetime.now(UTC) + delta
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def _run(*args: str, env: dict[str, str] | None = None) -> subprocess.CompletedProcess[str]:
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return subprocess.run(
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[sys.executable, str(_SCRIPT), *args],
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capture_output=True,
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text=True,
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cwd=_ROOT,
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env=env,
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timeout=120,
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)
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@pytest.fixture
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async def dsn():
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value = _dsn_value()
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if value is None:
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pytest.skip("PGW_TELEMETRY_PG_DSN 未配置")
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# 隔离守卫: 该实例有 app/chs_prod 等在用库,只许打 polygateway 专用库
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if not value.rstrip("/").endswith("/polygateway"):
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pytest.fail(f"保留期脚本测试只允许连 polygateway 专用库,当前 DSN 库名不符: {value!r}")
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return value
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async def _make_schema(dsn_value: str, prefix: str, ddl: str, extra: tuple[str, ...] = ()) -> str:
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import asyncpg
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name = f"pgwret_{prefix}_{uuid4().hex[:8]}"
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conn = await asyncpg.connect(dsn_value, timeout=10)
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try:
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await conn.execute(f"CREATE SCHEMA {name}")
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await conn.execute(f"SET search_path = {name}")
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await conn.execute(ddl)
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for statement in extra:
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await conn.execute(statement)
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finally:
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await conn.close()
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return name
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async def _drop_schema(dsn_value: str, name: str) -> None:
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import asyncpg
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conn = await asyncpg.connect(dsn_value, timeout=10)
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try:
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await conn.execute(f"DROP SCHEMA {name} CASCADE")
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finally:
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await conn.close()
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async def _seed(schema_dsn: str, rows: list[tuple[str, str, datetime]]) -> None:
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import asyncpg
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conn = await asyncpg.connect(schema_dsn, timeout=10)
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try:
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await conn.executemany(_INSERT, rows)
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finally:
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await conn.close()
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async def _call_ids(schema_dsn: str) -> list[str]:
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import asyncpg
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conn = await asyncpg.connect(schema_dsn, timeout=10)
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try:
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rows = await conn.fetch("SELECT call_id FROM llm_calls ORDER BY call_id")
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finally:
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await conn.close()
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return [r["call_id"] for r in rows]
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async def _public_count(dsn_value: str) -> int:
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"""共享表的行数;本测试全程不得让它变动一行。"""
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import asyncpg
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conn = await asyncpg.connect(dsn_value, timeout=10)
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try:
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if await conn.fetchval("SELECT to_regclass('public.llm_calls')") is None:
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return -1
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return await conn.fetchval("SELECT COUNT(*) FROM public.llm_calls")
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finally:
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await conn.close()
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@pytest.fixture
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async def partitioned_schema(dsn):
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"""临时 schema 内的**分区表**: 脚本必须认出它并让路给 DROP PARTITION。"""
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name = await _make_schema(
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dsn,
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"part",
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_partitioned_ddl(),
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extra=(
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"CREATE TABLE llm_calls_all PARTITION OF llm_calls "
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"FOR VALUES FROM ('2000-01-01') TO ('2100-01-01')",
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),
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)
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yield _search_path_dsn(dsn, name), name
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await _drop_schema(dsn, name)
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@pytest.fixture
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async def plain_schema(dsn):
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"""临时 schema 内的普通表: 存量场景,脚本的分批 DELETE 兜底路径。"""
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name = await _make_schema(dsn, "plain", PG_DDL)
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yield _search_path_dsn(dsn, name), name
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await _drop_schema(dsn, name)
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class TestPartitionedTarget:
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async def test_partitioned_table_exits_three_without_deleting_anything(
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self, partitioned_schema
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):
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schema_dsn, schema = partitioned_schema
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await _seed(
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schema_dsn,
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[
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("part-old-1", "", _stamp(timedelta(days=-30))),
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("part-old-2", "acme", _stamp(timedelta(days=-20))),
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],
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)
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# 带 --apply 跑: 危险的那条路径必须在真正删之前就被分区探测拦住
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result = _run(
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"--backend", "postgres", "--dsn", schema_dsn, "--older-than-days", "7", "--apply"
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)
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assert result.returncode == 3, (result.stdout, result.stderr)
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combined = result.stdout + result.stderr
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assert "DROP PARTITION" in combined
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assert "DETACH" in combined
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assert await _call_ids(schema_dsn) == ["part-old-1", "part-old-2"]
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# 脚本必须报出它解析到的**限定表名**: 这是"我删的到底是哪张表"的唯一凭据
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assert f"{schema}.llm_calls" in result.stdout
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class TestPlainTableBatches:
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async def test_apply_deletes_only_expired_rows_in_batches(self, plain_schema, dsn):
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schema_dsn, schema = plain_schema
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before_public = await _public_count(dsn)
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await _seed(
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schema_dsn,
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[
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("old-1", "", _stamp(timedelta(days=-40))),
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("old-2", "acme", _stamp(timedelta(days=-30))),
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("old-3", "acme", _stamp(timedelta(days=-20))),
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("old-4", "acme", _stamp(timedelta(days=-15))),
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("old-5", "", _stamp(timedelta(days=-10))),
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("fresh-1", "acme", _stamp(timedelta(days=-1))),
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("fresh-2", "", _stamp(timedelta(hours=-1))),
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],
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)
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result = _run(
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"--backend",
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"postgres",
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"--dsn",
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schema_dsn,
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"--older-than-days",
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"7",
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"--apply",
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"--batch-size",
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"2",
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)
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assert result.returncode == 0, (result.stdout, result.stderr)
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assert await _call_ids(schema_dsn) == ["fresh-1", "fresh-2"]
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assert f"{schema}.llm_calls" in result.stdout
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assert "将删除行数: 5" in result.stdout
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assert "'acme': 3" in result.stdout
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# 5 行 / 每批 2 行 = 3 批,每批各自提交;批次行必须真的出现三条
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assert "批次 1" in result.stdout
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assert "批次 3" in result.stdout
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assert "批次 4" not in result.stdout
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assert "已删除 5 行" in result.stdout
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assert await _public_count(dsn) == before_public
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async def test_dry_run_on_a_plain_table_deletes_nothing(self, plain_schema):
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schema_dsn, _ = plain_schema
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await _seed(schema_dsn, [("old-1", "acme", _stamp(timedelta(days=-30)))])
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result = _run("--backend", "postgres", "--dsn", schema_dsn, "--older-than-days", "7")
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assert result.returncode == 0, (result.stdout, result.stderr)
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assert "将删除行数: 1" in result.stdout
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assert "dry-run" in result.stdout
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assert await _call_ids(schema_dsn) == ["old-1"]
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class TestMissingAsyncpg:
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async def test_missing_asyncpg_exits_two_without_touching_rows(self, plain_schema, tmp_path):
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"""缺 asyncpg 必须明确报错退出(码 2),不静默降级——这是运维工具不是库路径。
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用一个只 `raise ImportError` 的临时 `asyncpg.py` 挂进子进程的 PYTHONPATH 构造该
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场景: 脚本跑在子进程里,monkeypatch 对它无效。DSN 用**真实可连**的临时 schema,
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这样"没有导入守卫"的实现会走通并退出 0,而不是碰巧也退出 2 而假绿。
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"""
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schema_dsn, _ = plain_schema
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await _seed(schema_dsn, [("old-1", "acme", _stamp(timedelta(days=-30)))])
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stub = tmp_path / "stub"
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stub.mkdir()
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(stub / "asyncpg.py").write_text(
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'raise ImportError("asyncpg 未安装(测试构造)")\n', encoding="utf-8"
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)
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env = {
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**os.environ,
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"PYTHONPATH": os.pathsep.join(
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[str(stub), *([p] if (p := os.environ.get("PYTHONPATH")) else [])]
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),
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}
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result = _run(
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"--backend",
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"postgres",
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"--dsn",
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schema_dsn,
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"--older-than-days",
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"7",
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"--apply",
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env=env,
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)
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assert result.returncode == 2, (result.stdout, result.stderr)
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assert "asyncpg" in result.stderr
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assert "pip install" in result.stderr
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assert await _call_ids(schema_dsn) == ["old-1"]
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@@ -0,0 +1,273 @@
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"""`tools/telemetry_retention.py` 的 SQLite 分支测试(issue #12 Task 3)。
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一律经 `subprocess` 跑真实脚本 + 真实临时 SQLite 库文件: 脚本是独立运维工具、
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不被库 import,用 monkeypatch 或直接 import 私有函数测出来的"通过"与运维实际
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执行的那条路径不是同一条(退出码、argparse 行为、stdout 全都测不到)。
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"""
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from __future__ import annotations
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import sqlite3
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import subprocess
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import sys
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from datetime import UTC, datetime, timedelta
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from pathlib import Path
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from polygateway.telemetry.schema import SQLITE_DDL
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_ROOT = Path(__file__).resolve().parents[2]
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_SCRIPT = _ROOT / "tools" / "telemetry_retention.py"
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_TIME_FORMAT = "%Y-%m-%d %H:%M:%S"
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# 库写入 SQLite 的 created_at 是 UTC 的 'YYYY-MM-DD HH:MM:SS' 文本(schema 的
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# DEFAULT (datetime('now'))),测试数据必须同款,否则字符串比较的口径就假了
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_INSERT = (
|
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"INSERT INTO llm_calls (call_id, model, provider, source_name, messages, response, "
|
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"prompt_tokens, completion_tokens, usage_source, latency_ms, tenant_id, created_at) "
|
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"VALUES (?, 'm', 'p', 's1', '[]', 'ok', 1, 2, 'measured', 10, ?, ?)"
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)
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def _stamp(delta: timedelta) -> str:
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return (datetime.now(UTC) + delta).strftime(_TIME_FORMAT)
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|
||||
|
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def _make_db(tmp_path: Path, rows: list[tuple[str, str, str]]) -> Path:
|
||||
"""按库的真实 DDL 建临时库并灌入 (call_id, tenant_id, created_at) 三元组。"""
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path = tmp_path / "telemetry.db"
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conn = sqlite3.connect(path)
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try:
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conn.executescript(SQLITE_DDL)
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conn.executemany(_INSERT, rows)
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conn.commit()
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finally:
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conn.close()
|
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return path
|
||||
|
||||
|
||||
def _run(*args: str) -> subprocess.CompletedProcess[str]:
|
||||
return subprocess.run(
|
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[sys.executable, str(_SCRIPT), *args],
|
||||
capture_output=True,
|
||||
text=True,
|
||||
cwd=_ROOT,
|
||||
timeout=120,
|
||||
)
|
||||
|
||||
|
||||
def _rows(path: Path) -> list[str]:
|
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conn = sqlite3.connect(path)
|
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try:
|
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return [r[0] for r in conn.execute("SELECT call_id FROM llm_calls ORDER BY call_id")]
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finally:
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conn.close()
|
||||
|
||||
|
||||
def _aged_db(tmp_path: Path) -> Path:
|
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return _make_db(
|
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tmp_path,
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[
|
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("old-1", "", _stamp(timedelta(days=-30))),
|
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("old-2", "acme", _stamp(timedelta(days=-20))),
|
||||
("old-3", "acme", _stamp(timedelta(days=-10))),
|
||||
("fresh-1", "acme", _stamp(timedelta(days=-1))),
|
||||
("fresh-2", "", _stamp(timedelta(hours=-1))),
|
||||
],
|
||||
)
|
||||
|
||||
|
||||
class TestSqliteDryRun:
|
||||
def test_dry_run_deletes_nothing_and_reports_counts_range_and_tenants(self, tmp_path):
|
||||
"""缺省(不带 --apply)是 dry-run: 一行不删,且报出足以判断"删的是不是我想删的"的三样。"""
|
||||
path = _aged_db(tmp_path)
|
||||
|
||||
result = _run("--backend", "sqlite", "--path", str(path), "--older-than-days", "7")
|
||||
|
||||
assert result.returncode == 0, result.stderr
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assert _rows(path) == ["fresh-1", "fresh-2", "old-1", "old-2", "old-3"]
|
||||
assert "将删除行数: 3" in result.stdout
|
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assert "created_at 范围:" in result.stdout
|
||||
assert "按 tenant_id 分布" in result.stdout
|
||||
# 空串是"未归属"的哨兵而非 NULL,repr 让它在输出里不被误读成缺失
|
||||
assert "'acme': 2" in result.stdout
|
||||
assert "'': 1" in result.stdout
|
||||
assert "dry-run" in result.stdout
|
||||
|
||||
def test_dry_run_reports_the_actual_created_at_window(self, tmp_path):
|
||||
"""时间范围报的必须是**命中行**的窗口,不是全表的。"""
|
||||
path = _aged_db(tmp_path)
|
||||
|
||||
result = _run("--backend", "sqlite", "--path", str(path), "--older-than-days", "7")
|
||||
|
||||
conn = sqlite3.connect(path)
|
||||
try:
|
||||
low, high = conn.execute(
|
||||
"SELECT MIN(created_at), MAX(created_at) FROM llm_calls WHERE call_id LIKE 'old-%'"
|
||||
).fetchone()
|
||||
finally:
|
||||
conn.close()
|
||||
assert f"{low} ~ {high}" in result.stdout
|
||||
|
||||
|
||||
class TestSqliteApply:
|
||||
def test_apply_removes_only_expired_rows(self, tmp_path):
|
||||
path = _aged_db(tmp_path)
|
||||
|
||||
result = _run(
|
||||
"--backend", "sqlite", "--path", str(path), "--older-than-days", "7", "--apply"
|
||||
)
|
||||
|
||||
assert result.returncode == 0, result.stderr
|
||||
assert _rows(path) == ["fresh-1", "fresh-2"]
|
||||
assert "已删除 3 行" in result.stdout
|
||||
|
||||
def test_older_than_days_zero_deletes_everything_before_now(self, tmp_path):
|
||||
"""N=0 的边界: 截止时刻即"此刻",此刻之前的全删、之后的(未来戳)留下。"""
|
||||
path = _make_db(
|
||||
tmp_path,
|
||||
[
|
||||
("past", "", _stamp(timedelta(seconds=-5))),
|
||||
("future", "", _stamp(timedelta(hours=1))),
|
||||
],
|
||||
)
|
||||
|
||||
result = _run(
|
||||
"--backend", "sqlite", "--path", str(path), "--older-than-days", "0", "--apply"
|
||||
)
|
||||
|
||||
assert result.returncode == 0, result.stderr
|
||||
assert _rows(path) == ["future"]
|
||||
|
||||
def test_vacuum_with_apply_rewrites_the_file(self, tmp_path):
|
||||
path = _aged_db(tmp_path)
|
||||
|
||||
result = _run(
|
||||
"--backend",
|
||||
"sqlite",
|
||||
"--path",
|
||||
str(path),
|
||||
"--older-than-days",
|
||||
"7",
|
||||
"--apply",
|
||||
"--vacuum",
|
||||
)
|
||||
|
||||
assert result.returncode == 0, result.stderr
|
||||
assert "VACUUM" in result.stdout
|
||||
assert _rows(path) == ["fresh-1", "fresh-2"]
|
||||
|
||||
def test_deleting_from_a_db_without_the_table_is_a_backend_failure(self, tmp_path):
|
||||
"""连得上但没有 llm_calls: 属"目标不可用",退出码 2 且**不**静默当成 0 行。"""
|
||||
path = tmp_path / "empty.db"
|
||||
sqlite3.connect(path).close()
|
||||
|
||||
result = _run("--backend", "sqlite", "--path", str(path), "--older-than-days", "7")
|
||||
|
||||
assert result.returncode == 2
|
||||
assert "llm_calls" in result.stderr
|
||||
|
||||
def test_missing_db_file_exits_two(self, tmp_path):
|
||||
result = _run(
|
||||
"--backend", "sqlite", "--path", str(tmp_path / "nope.db"), "--older-than-days", "7"
|
||||
)
|
||||
|
||||
assert result.returncode == 2
|
||||
assert "nope.db" in result.stderr
|
||||
|
||||
|
||||
class TestUsageErrors:
|
||||
"""参数层的一切错误都是退出码 1(argparse 默认的 2 已被本脚本改写,2 留给连接失败)。"""
|
||||
|
||||
def test_sqlite_with_dsn_exits_one(self, tmp_path):
|
||||
result = _run(
|
||||
"--backend",
|
||||
"sqlite",
|
||||
"--path",
|
||||
str(tmp_path / "x.db"),
|
||||
"--dsn",
|
||||
"postgresql://x/y",
|
||||
"--older-than-days",
|
||||
"7",
|
||||
)
|
||||
|
||||
assert result.returncode == 1
|
||||
assert "--dsn" in result.stderr
|
||||
|
||||
def test_sqlite_without_path_exits_one(self):
|
||||
result = _run("--backend", "sqlite", "--older-than-days", "7")
|
||||
|
||||
assert result.returncode == 1
|
||||
assert "--path" in result.stderr
|
||||
|
||||
def test_sqlite_with_batch_size_exits_one(self, tmp_path):
|
||||
result = _run(
|
||||
"--backend",
|
||||
"sqlite",
|
||||
"--path",
|
||||
str(tmp_path / "x.db"),
|
||||
"--older-than-days",
|
||||
"7",
|
||||
"--batch-size",
|
||||
"10",
|
||||
)
|
||||
|
||||
assert result.returncode == 1
|
||||
assert "--batch-size" in result.stderr
|
||||
|
||||
def test_postgres_with_vacuum_exits_one(self):
|
||||
result = _run(
|
||||
"--backend",
|
||||
"postgres",
|
||||
"--dsn",
|
||||
"postgresql://x/y",
|
||||
"--older-than-days",
|
||||
"7",
|
||||
"--apply",
|
||||
"--vacuum",
|
||||
)
|
||||
|
||||
assert result.returncode == 1
|
||||
assert "--vacuum" in result.stderr
|
||||
|
||||
def test_vacuum_without_apply_exits_one(self, tmp_path):
|
||||
result = _run(
|
||||
"--backend",
|
||||
"sqlite",
|
||||
"--path",
|
||||
str(tmp_path / "x.db"),
|
||||
"--older-than-days",
|
||||
"7",
|
||||
"--vacuum",
|
||||
)
|
||||
|
||||
assert result.returncode == 1
|
||||
assert "--apply" in result.stderr
|
||||
|
||||
def test_missing_older_than_days_exits_one(self, tmp_path):
|
||||
result = _run("--backend", "sqlite", "--path", str(tmp_path / "x.db"))
|
||||
|
||||
assert result.returncode == 1
|
||||
|
||||
def test_negative_older_than_days_exits_one(self, tmp_path):
|
||||
result = _run(
|
||||
"--backend", "sqlite", "--path", str(tmp_path / "x.db"), "--older-than-days", "-1"
|
||||
)
|
||||
|
||||
assert result.returncode == 1
|
||||
assert "--older-than-days" in result.stderr
|
||||
|
||||
def test_unknown_backend_exits_one(self, tmp_path):
|
||||
result = _run("--backend", "mysql", "--path", str(tmp_path / "x.db"))
|
||||
|
||||
assert result.returncode == 1
|
||||
|
||||
|
||||
class TestHelp:
|
||||
def test_help_names_the_maintenance_role_and_the_recommended_path(self):
|
||||
"""帮助文本是运维唯一会读的文档,权限口径与"推荐不是 DELETE"必须在里面。"""
|
||||
result = _run("--help")
|
||||
|
||||
assert result.returncode == 0
|
||||
assert "维护角色" in result.stdout
|
||||
assert "REVOKE" in result.stdout
|
||||
assert "PARTITION" in result.stdout
|
||||
Reference in New Issue
Block a user