async def test_min_size_max_size(dsn): async with pool.AsyncConnectionPool(dsn, min_size=2) as p: assert p.min_size == p.max_size == 2 async with pool.AsyncConnectionPool(dsn, min_size=2, max_size=4) as p: assert p.min_size == 2 assert p.max_size == 4 with pytest.raises(ValueError): pool.AsyncConnectionPool(dsn, min_size=4, max_size=2)
async def test_wait_ready(dsn, monkeypatch): delay_connection(monkeypatch, 0.1) with pytest.raises(pool.PoolTimeout): async with pool.AsyncConnectionPool(dsn, min_size=4, num_workers=1) as p: await p.wait(0.3) async with pool.AsyncConnectionPool(dsn, min_size=4, num_workers=1) as p: await p.wait(0.5) async with pool.AsyncConnectionPool(dsn, min_size=4, num_workers=2) as p: await p.wait(0.3) await p.wait(0.0001) # idempotent
async def test_stats_usage(dsn, retries): async def worker(n): try: async with p.connection(timeout=0.3) as conn: await conn.execute("select pg_sleep(0.2)") except pool.PoolTimeout: pass async for retry in retries: with retry: async with pool.AsyncConnectionPool(dsn, min_size=3) as p: await p.wait(2.0) ts = [create_task(worker(i)) for i in range(7)] await asyncio.gather(*ts) stats = p.get_stats() assert stats["requests_num"] == 7 assert stats["requests_queued"] == 4 assert 850 <= stats["requests_wait_ms"] <= 950 assert stats["requests_errors"] == 1 assert 1150 <= stats["usage_ms"] <= 1250 assert stats.get("returns_bad", 0) == 0 async with p.connection() as conn: await conn.close() await p.wait() stats = p.pop_stats() assert stats["requests_num"] == 8 assert stats["returns_bad"] == 1 async with p.connection(): pass assert p.get_stats()["requests_num"] == 1
async def test_putconn_no_pool(dsn): async with pool.AsyncConnectionPool(dsn, min_size=1) as p: conn = await psycopg.AsyncConnection.connect(dsn) with pytest.raises(ValueError): await p.putconn(conn) await conn.close()
async def test_queue_size(dsn): async def worker(t, ev=None): try: async with p.connection(): if ev: ev.set() await asyncio.sleep(t) except pool.TooManyRequests as e: errors.append(e) else: success.append(True) errors = [] success = [] async with pool.AsyncConnectionPool(dsn, min_size=1, max_waiting=3) as p: await p.wait() ev = asyncio.Event() create_task(worker(0.3, ev)) await ev.wait() ts = [create_task(worker(0.1)) for i in range(4)] await asyncio.gather(*ts) assert len(success) == 4 assert len(errors) == 1 assert isinstance(errors[0], pool.TooManyRequests) assert p.name in str(errors[0]) assert str(p.max_waiting) in str(errors[0]) assert p.get_stats()["requests_errors"] == 1
async def test_queue_timeout(dsn, retries): async def worker(n): t0 = time() try: async with p.connection() as conn: cur = await conn.execute( "select pg_backend_pid() from pg_sleep(0.2)") (pid, ) = await cur.fetchone() # type: ignore[misc] except pool.PoolTimeout as e: t1 = time() errors.append((n, t1 - t0, e)) else: t1 = time() results.append((n, t1 - t0, pid)) async for retry in retries: with retry: results: List[Tuple[int, float, int]] = [] errors: List[Tuple[int, float, Exception]] = [] async with pool.AsyncConnectionPool(dsn, min_size=2, timeout=0.1) as p: ts = [create_task(worker(i)) for i in range(4)] await asyncio.gather(*ts) assert len(results) == 2 assert len(errors) == 2 for e in errors: assert 0.1 < e[1] < 0.15
async def test_setup_no_timeout(dsn, proxy): with pytest.raises(pool.PoolTimeout): async with pool.AsyncConnectionPool(proxy.client_dsn, min_size=1, num_workers=1) as p: await p.wait(0.2) async with pool.AsyncConnectionPool(proxy.client_dsn, min_size=1, num_workers=1) as p: await asyncio.sleep(0.5) assert not p._pool proxy.start() async with p.connection() as conn: await conn.execute("select 1")
async def test_grow(dsn, monkeypatch, retries): delay_connection(monkeypatch, 0.1) async def worker(n): t0 = time() async with p.connection() as conn: await conn.execute("select 1 from pg_sleep(0.2)") t1 = time() results.append((n, t1 - t0)) async for retry in retries: with retry: async with pool.AsyncConnectionPool(dsn, min_size=2, max_size=4, num_workers=3) as p: await p.wait(1.0) ts = [] results = [] ts = [create_task(worker(i)) for i in range(6)] await asyncio.gather(*ts) want_times = [0.2, 0.2, 0.3, 0.4, 0.4, 0.4] times = [item[1] for item in results] for got, want in zip(times, want_times): assert got == pytest.approx(want, 0.1), times
async def test_queue_timeout_override(dsn, retries): async def worker(n): t0 = time() timeout = 0.25 if n == 3 else None try: async with p.connection(timeout=timeout) as conn: cur = await conn.execute( "select pg_backend_pid() from pg_sleep(0.2)") (pid, ) = await cur.fetchone() except pool.PoolTimeout as e: t1 = time() errors.append((n, t1 - t0, e)) else: t1 = time() results.append((n, t1 - t0, pid)) async for retry in retries: with retry: results = [] errors = [] async with pool.AsyncConnectionPool(dsn, min_size=2, timeout=0.1) as p: ts = [create_task(worker(i)) for i in range(4)] await asyncio.gather(*ts) assert len(results) == 3 assert len(errors) == 1 for e in errors: assert 0.1 < e[1] < 0.15
async def test_defaults(dsn): async with pool.AsyncConnectionPool(dsn) as p: assert p.min_size == p.max_size == 4 assert p.timeout == 30 assert p.max_idle == 10 * 60 assert p.max_lifetime == 60 * 60 assert p.num_workers == 3
async def test_shrink(dsn, monkeypatch): from psycopg_pool.pool_async import ShrinkPool results = [] async def run_hacked(self, pool): n0 = pool._nconns await orig_run(self, pool) n1 = pool._nconns results.append((n0, n1)) orig_run = ShrinkPool._run monkeypatch.setattr(ShrinkPool, "_run", run_hacked) async def worker(n): async with p.connection() as conn: await conn.execute("select pg_sleep(0.1)") async with pool.AsyncConnectionPool(dsn, min_size=2, max_size=4, max_idle=0.2) as p: await p.wait(5.0) assert p.max_idle == 0.2 ts = [create_task(worker(i)) for i in range(4)] await asyncio.gather(*ts) await asyncio.sleep(1) assert results == [(4, 4), (4, 3), (3, 2), (2, 2), (2, 2)]
async def test_reset(dsn): resets = 0 async def setup(conn): async with conn.transaction(): await conn.execute("set timezone to '+1:00'") async def reset(conn): nonlocal resets resets += 1 async with conn.transaction(): await conn.execute("set timezone to utc") async with pool.AsyncConnectionPool(dsn, min_size=1, reset=reset) as p: async with p.connection() as conn: assert resets == 0 await conn.execute("set timezone to '+2:00'") await p.wait() assert resets == 1 async with p.connection() as conn: cur = await conn.execute("show timezone") assert (await cur.fetchone()) == ("UTC", ) await p.wait() assert resets == 2
async def test_stats_measures(dsn): async def worker(n): async with p.connection() as conn: await conn.execute("select pg_sleep(0.2)") async with pool.AsyncConnectionPool(dsn, min_size=2, max_size=4) as p: await p.wait(2.0) stats = p.get_stats() assert stats["pool_min"] == 2 assert stats["pool_max"] == 4 assert stats["pool_size"] == 2 assert stats["pool_available"] == 2 assert stats["requests_waiting"] == 0 ts = [create_task(worker(i)) for i in range(3)] await asyncio.sleep(0.1) stats = p.get_stats() await asyncio.gather(*ts) assert stats["pool_min"] == 2 assert stats["pool_max"] == 4 assert stats["pool_size"] == 3 assert stats["pool_available"] == 0 assert stats["requests_waiting"] == 0 await p.wait(2.0) ts = [create_task(worker(i)) for i in range(7)] await asyncio.sleep(0.1) stats = p.get_stats() await asyncio.gather(*ts) assert stats["pool_min"] == 2 assert stats["pool_max"] == 4 assert stats["pool_size"] == 4 assert stats["pool_available"] == 0 assert stats["requests_waiting"] == 3
async def test_configure(dsn): inits = 0 async def configure(conn): nonlocal inits inits += 1 async with conn.transaction(): await conn.execute("set default_transaction_read_only to on") async with pool.AsyncConnectionPool(dsn, min_size=1, configure=configure) as p: await p.wait(timeout=1.0) async with p.connection() as conn: assert inits == 1 res = await conn.execute("show default_transaction_read_only") assert (await res.fetchone())[0] == "on" async with p.connection() as conn: assert inits == 1 res = await conn.execute("show default_transaction_read_only") assert (await res.fetchone())[0] == "on" await conn.close() async with p.connection() as conn: assert inits == 2 res = await conn.execute("show default_transaction_read_only") assert (await res.fetchone())[0] == "on"
async def test_fail_rollback_close(dsn, caplog, monkeypatch): async with pool.AsyncConnectionPool(dsn, min_size=1) as p: conn = await p.getconn() async def bad_rollback(): conn.pgconn.finish() await orig_rollback() # Make the rollback fail orig_rollback = conn.rollback monkeypatch.setattr(conn, "rollback", bad_rollback) pid = conn.pgconn.backend_pid with pytest.raises(psycopg.ProgrammingError): await conn.execute("wat") assert conn.pgconn.transaction_status == TransactionStatus.INERROR await p.putconn(conn) async with p.connection() as conn2: assert conn2.pgconn.backend_pid != pid assert conn2.pgconn.transaction_status == TransactionStatus.IDLE recs = [ r for r in caplog.records if r.name.startswith("psycopg") and r.levelno >= logging.WARNING ] assert len(recs) == 3 assert "INERROR" in recs[0].message assert "OperationalError" in recs[1].message assert "BAD" in recs[2].message
async def test_connection_class(dsn): class MyConn(psycopg.AsyncConnection): pass async with pool.AsyncConnectionPool(dsn, connection_class=MyConn, min_size=1) as p: async with p.connection() as conn: assert isinstance(conn, MyConn)
async def test_connection_not_lost(dsn): async with pool.AsyncConnectionPool(dsn, min_size=1) as p: with pytest.raises(ZeroDivisionError): async with p.connection() as conn: pid = conn.pgconn.backend_pid 1 / 0 async with p.connection() as conn2: assert conn2.pgconn.backend_pid == pid
async def test_reopen(dsn): p = pool.AsyncConnectionPool(dsn) async with p.connection() as conn: await conn.execute("select 1") await p.close() assert p._sched_runner is None with pytest.raises(psycopg.OperationalError, match="cannot be reused"): await p.open()
async def test_closed_putconn(dsn): p = pool.AsyncConnectionPool(dsn, min_size=1) async with p.connection() as conn: pass assert not conn.closed async with p.connection() as conn: await p.close() assert conn.closed
async def test_close_no_tasks(dsn): p = pool.AsyncConnectionPool(dsn) assert not p._sched_runner.done() for t in p._workers: assert not t.done() await p.close() assert p._sched_runner.done() for t in p._workers: assert t.done()
async def test_max_lifetime(dsn): async with pool.AsyncConnectionPool(dsn, min_size=1, max_lifetime=0.2) as p: await asyncio.sleep(0.1) pids = [] for i in range(5): async with p.connection() as conn: pids.append(conn.pgconn.backend_pid) await asyncio.sleep(0.2) assert pids[0] == pids[1] != pids[4], pids
async def test_uniform_use(dsn, retries): async for retry in retries: with retry: async with pool.AsyncConnectionPool(dsn, min_size=4) as p: counts = Counter() for i in range(8): async with p.connection() as conn: await asyncio.sleep(0.1) counts[id(conn)] += 1 assert len(counts) == 4 assert set(counts.values()) == set([2])
async def test_its_really_a_pool(dsn): async with pool.AsyncConnectionPool(dsn, min_size=2) as p: async with p.connection() as conn: cur = await conn.execute("select pg_backend_pid()") (pid1, ) = await cur.fetchone() async with p.connection() as conn2: cur = await conn2.execute("select pg_backend_pid()") (pid2, ) = await cur.fetchone() async with p.connection() as conn: assert conn.pgconn.backend_pid in (pid1, pid2)
async def test_open_context(dsn): p = pool.AsyncConnectionPool(dsn, open=False) assert p.closed async with p: assert not p.closed async with p.connection() as conn: cur = await conn.execute("select 1") assert await cur.fetchone() == (1, ) assert p.closed
async def test_closed_getconn(dsn): p = pool.AsyncConnectionPool(dsn, min_size=1) assert not p.closed async with p.connection(): pass await p.close() assert p.closed with pytest.raises(pool.PoolClosed): async with p.connection(): pass
async def test_broken_reconnect(dsn): async with pool.AsyncConnectionPool(dsn, min_size=1) as p: async with p.connection() as conn: cur = await conn.execute("select pg_backend_pid()") (pid1, ) = await cur.fetchone() await conn.close() async with p.connection() as conn2: cur = await conn2.execute("select pg_backend_pid()") (pid2, ) = await cur.fetchone() assert pid1 != pid2
async def test_configure_badstate(dsn, caplog): caplog.set_level(logging.WARNING, logger="psycopg.pool") async def configure(conn): await conn.execute("select 1") async with pool.AsyncConnectionPool(dsn, min_size=1, configure=configure) as p: with pytest.raises(pool.PoolTimeout): await p.wait(timeout=0.5) assert caplog.records assert "INTRANS" in caplog.records[0].message
async def test_open_no_op(dsn): p = pool.AsyncConnectionPool(dsn) try: assert not p.closed await p.open() assert not p.closed async with p.connection() as conn: cur = await conn.execute("select 1") assert await cur.fetchone() == (1, ) finally: await p.close()
async def test_close_no_tasks(dsn): p = pool.AsyncConnectionPool(dsn) assert p._sched_runner and not p._sched_runner.done() assert p._workers workers = p._workers[:] for t in workers: assert not t.done() await p.close() assert p._sched_runner is None assert not p._workers for t in workers: assert t.done()
async def test_spike(dsn, monkeypatch): # Inspired to https://github.com/brettwooldridge/HikariCP/blob/dev/ # documents/Welcome-To-The-Jungle.md delay_connection(monkeypatch, 0.15) async def worker(): async with p.connection(): await asyncio.sleep(0.002) async with pool.AsyncConnectionPool(dsn, min_size=5, max_size=10) as p: await p.wait() ts = [create_task(worker()) for i in range(50)] await asyncio.gather(*ts) await p.wait() assert len(p._pool) < 7