plugeth/eth/filters/filter_test.go
Sina Mahmoodi 95741b1844
core: move genesis alloc types to core/types (#29003)
We want to use these types in public user-facing APIs, so they shouldn't be in core.

Co-authored-by: Felix Lange <fjl@twurst.com>
2024-02-16 19:05:33 +01:00

391 lines
20 KiB
Go

// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package filters
import (
"context"
"encoding/json"
"math/big"
"strings"
"testing"
"time"
"github.com/ethereum/go-ethereum/accounts/abi"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/consensus/ethash"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/rpc"
"github.com/ethereum/go-ethereum/triedb"
)
func makeReceipt(addr common.Address) *types.Receipt {
receipt := types.NewReceipt(nil, false, 0)
receipt.Logs = []*types.Log{
{Address: addr},
}
receipt.Bloom = types.CreateBloom(types.Receipts{receipt})
return receipt
}
func BenchmarkFilters(b *testing.B) {
var (
db, _ = rawdb.NewLevelDBDatabase(b.TempDir(), 0, 0, "", false)
_, sys = newTestFilterSystem(b, db, Config{})
key1, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
addr1 = crypto.PubkeyToAddress(key1.PublicKey)
addr2 = common.BytesToAddress([]byte("jeff"))
addr3 = common.BytesToAddress([]byte("ethereum"))
addr4 = common.BytesToAddress([]byte("random addresses please"))
gspec = &core.Genesis{
Alloc: types.GenesisAlloc{addr1: {Balance: big.NewInt(1000000)}},
BaseFee: big.NewInt(params.InitialBaseFee),
Config: params.TestChainConfig,
}
)
defer db.Close()
_, chain, receipts := core.GenerateChainWithGenesis(gspec, ethash.NewFaker(), 100010, func(i int, gen *core.BlockGen) {
switch i {
case 2403:
receipt := makeReceipt(addr1)
gen.AddUncheckedReceipt(receipt)
gen.AddUncheckedTx(types.NewTransaction(999, common.HexToAddress("0x999"), big.NewInt(999), 999, gen.BaseFee(), nil))
case 1034:
receipt := makeReceipt(addr2)
gen.AddUncheckedReceipt(receipt)
gen.AddUncheckedTx(types.NewTransaction(999, common.HexToAddress("0x999"), big.NewInt(999), 999, gen.BaseFee(), nil))
case 34:
receipt := makeReceipt(addr3)
gen.AddUncheckedReceipt(receipt)
gen.AddUncheckedTx(types.NewTransaction(999, common.HexToAddress("0x999"), big.NewInt(999), 999, gen.BaseFee(), nil))
case 99999:
receipt := makeReceipt(addr4)
gen.AddUncheckedReceipt(receipt)
gen.AddUncheckedTx(types.NewTransaction(999, common.HexToAddress("0x999"), big.NewInt(999), 999, gen.BaseFee(), nil))
}
})
// The test txs are not properly signed, can't simply create a chain
// and then import blocks. TODO(rjl493456442) try to get rid of the
// manual database writes.
gspec.MustCommit(db, triedb.NewDatabase(db, triedb.HashDefaults))
for i, block := range chain {
rawdb.WriteBlock(db, block)
rawdb.WriteCanonicalHash(db, block.Hash(), block.NumberU64())
rawdb.WriteHeadBlockHash(db, block.Hash())
rawdb.WriteReceipts(db, block.Hash(), block.NumberU64(), receipts[i])
}
b.ResetTimer()
filter := sys.NewRangeFilter(0, -1, []common.Address{addr1, addr2, addr3, addr4}, nil)
for i := 0; i < b.N; i++ {
filter.begin = 0
logs, _ := filter.Logs(context.Background())
if len(logs) != 4 {
b.Fatal("expected 4 logs, got", len(logs))
}
}
}
func TestFilters(t *testing.T) {
var (
db = rawdb.NewMemoryDatabase()
_, sys = newTestFilterSystem(t, db, Config{})
// Sender account
key1, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
addr = crypto.PubkeyToAddress(key1.PublicKey)
signer = types.NewLondonSigner(big.NewInt(1))
// Logging contract
contract = common.Address{0xfe}
contract2 = common.Address{0xff}
abiStr = `[{"inputs":[],"name":"log0","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"t1","type":"uint256"}],"name":"log1","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"t1","type":"uint256"},{"internalType":"uint256","name":"t2","type":"uint256"}],"name":"log2","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"t1","type":"uint256"},{"internalType":"uint256","name":"t2","type":"uint256"},{"internalType":"uint256","name":"t3","type":"uint256"}],"name":"log3","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"t1","type":"uint256"},{"internalType":"uint256","name":"t2","type":"uint256"},{"internalType":"uint256","name":"t3","type":"uint256"},{"internalType":"uint256","name":"t4","type":"uint256"}],"name":"log4","outputs":[],"stateMutability":"nonpayable","type":"function"}]`
/*
// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.7.0 <0.9.0;
contract Logger {
function log0() external {
assembly {
log0(0, 0)
}
}
function log1(uint t1) external {
assembly {
log1(0, 0, t1)
}
}
function log2(uint t1, uint t2) external {
assembly {
log2(0, 0, t1, t2)
}
}
function log3(uint t1, uint t2, uint t3) external {
assembly {
log3(0, 0, t1, t2, t3)
}
}
function log4(uint t1, uint t2, uint t3, uint t4) external {
assembly {
log4(0, 0, t1, t2, t3, t4)
}
}
}
*/
bytecode = common.FromHex("608060405234801561001057600080fd5b50600436106100575760003560e01c80630aa731851461005c5780632a4c08961461006657806378b9a1f314610082578063c670f8641461009e578063c683d6a3146100ba575b600080fd5b6100646100d6565b005b610080600480360381019061007b9190610143565b6100dc565b005b61009c60048036038101906100979190610196565b6100e8565b005b6100b860048036038101906100b391906101d6565b6100f2565b005b6100d460048036038101906100cf9190610203565b6100fa565b005b600080a0565b808284600080a3505050565b8082600080a25050565b80600080a150565b80828486600080a450505050565b600080fd5b6000819050919050565b6101208161010d565b811461012b57600080fd5b50565b60008135905061013d81610117565b92915050565b60008060006060848603121561015c5761015b610108565b5b600061016a8682870161012e565b935050602061017b8682870161012e565b925050604061018c8682870161012e565b9150509250925092565b600080604083850312156101ad576101ac610108565b5b60006101bb8582860161012e565b92505060206101cc8582860161012e565b9150509250929050565b6000602082840312156101ec576101eb610108565b5b60006101fa8482850161012e565b91505092915050565b6000806000806080858703121561021d5761021c610108565b5b600061022b8782880161012e565b945050602061023c8782880161012e565b935050604061024d8782880161012e565b925050606061025e8782880161012e565b9150509295919450925056fea264697066735822122073a4b156f487e59970dc1ef449cc0d51467268f676033a17188edafcee861f9864736f6c63430008110033")
hash1 = common.BytesToHash([]byte("topic1"))
hash2 = common.BytesToHash([]byte("topic2"))
hash3 = common.BytesToHash([]byte("topic3"))
hash4 = common.BytesToHash([]byte("topic4"))
hash5 = common.BytesToHash([]byte("topic5"))
gspec = &core.Genesis{
Config: params.TestChainConfig,
Alloc: types.GenesisAlloc{
addr: {Balance: big.NewInt(0).Mul(big.NewInt(100), big.NewInt(params.Ether))},
contract: {Balance: big.NewInt(0), Code: bytecode},
contract2: {Balance: big.NewInt(0), Code: bytecode},
},
BaseFee: big.NewInt(params.InitialBaseFee),
}
)
contractABI, err := abi.JSON(strings.NewReader(abiStr))
if err != nil {
t.Fatal(err)
}
// Hack: GenerateChainWithGenesis creates a new db.
// Commit the genesis manually and use GenerateChain.
_, err = gspec.Commit(db, triedb.NewDatabase(db, nil))
if err != nil {
t.Fatal(err)
}
chain, _ := core.GenerateChain(gspec.Config, gspec.ToBlock(), ethash.NewFaker(), db, 1000, func(i int, gen *core.BlockGen) {
switch i {
case 1:
data, err := contractABI.Pack("log1", hash1.Big())
if err != nil {
t.Fatal(err)
}
tx, _ := types.SignTx(types.NewTx(&types.LegacyTx{
Nonce: 0,
GasPrice: gen.BaseFee(),
Gas: 30000,
To: &contract,
Data: data,
}), signer, key1)
gen.AddTx(tx)
tx2, _ := types.SignTx(types.NewTx(&types.LegacyTx{
Nonce: 1,
GasPrice: gen.BaseFee(),
Gas: 30000,
To: &contract2,
Data: data,
}), signer, key1)
gen.AddTx(tx2)
case 2:
data, err := contractABI.Pack("log2", hash2.Big(), hash1.Big())
if err != nil {
t.Fatal(err)
}
tx, _ := types.SignTx(types.NewTx(&types.LegacyTx{
Nonce: 2,
GasPrice: gen.BaseFee(),
Gas: 30000,
To: &contract,
Data: data,
}), signer, key1)
gen.AddTx(tx)
case 998:
data, err := contractABI.Pack("log1", hash3.Big())
if err != nil {
t.Fatal(err)
}
tx, _ := types.SignTx(types.NewTx(&types.LegacyTx{
Nonce: 3,
GasPrice: gen.BaseFee(),
Gas: 30000,
To: &contract2,
Data: data,
}), signer, key1)
gen.AddTx(tx)
case 999:
data, err := contractABI.Pack("log1", hash4.Big())
if err != nil {
t.Fatal(err)
}
tx, _ := types.SignTx(types.NewTx(&types.LegacyTx{
Nonce: 4,
GasPrice: gen.BaseFee(),
Gas: 30000,
To: &contract,
Data: data,
}), signer, key1)
gen.AddTx(tx)
}
})
var l uint64
bc, err := core.NewBlockChain(db, nil, gspec, nil, ethash.NewFaker(), vm.Config{}, nil, &l)
if err != nil {
t.Fatal(err)
}
_, err = bc.InsertChain(chain)
if err != nil {
t.Fatal(err)
}
// Set block 998 as Finalized (-3)
bc.SetFinalized(chain[998].Header())
// Generate pending block
pchain, preceipts := core.GenerateChain(gspec.Config, chain[len(chain)-1], ethash.NewFaker(), db, 1, func(i int, gen *core.BlockGen) {
data, err := contractABI.Pack("log1", hash5.Big())
if err != nil {
t.Fatal(err)
}
tx, _ := types.SignTx(types.NewTx(&types.LegacyTx{
Nonce: 5,
GasPrice: gen.BaseFee(),
Gas: 30000,
To: &contract,
Data: data,
}), signer, key1)
gen.AddTx(tx)
})
sys.backend.(*testBackend).pendingBlock = pchain[0]
sys.backend.(*testBackend).pendingReceipts = preceipts[0]
for i, tc := range []struct {
f *Filter
want string
err string
}{
{
f: sys.NewBlockFilter(chain[2].Hash(), []common.Address{contract}, nil),
want: `[{"address":"0xfe00000000000000000000000000000000000000","topics":["0x0000000000000000000000000000000000000000000000000000746f70696332","0x0000000000000000000000000000000000000000000000000000746f70696331"],"data":"0x","blockNumber":"0x3","transactionHash":"0xdefe471992a07a02acdfbe33edaae22fbb86d7d3cec3f1b8e4e77702fb3acc1d","transactionIndex":"0x0","blockHash":"0x7a7556792ca7d37882882e2b001fe14833eaf81c2c7f865c9c771ec37a024f6b","logIndex":"0x0","removed":false}]`,
},
{
f: sys.NewRangeFilter(0, int64(rpc.LatestBlockNumber), []common.Address{contract}, [][]common.Hash{{hash1, hash2, hash3, hash4}}),
want: `[{"address":"0xfe00000000000000000000000000000000000000","topics":["0x0000000000000000000000000000000000000000000000000000746f70696331"],"data":"0x","blockNumber":"0x2","transactionHash":"0xa8028c655b6423204c8edfbc339f57b042d6bec2b6a61145d76b7c08b4cccd42","transactionIndex":"0x0","blockHash":"0x24417bb49ce44cfad65da68f33b510bf2a129c0d89ccf06acb6958b8585ccf34","logIndex":"0x0","removed":false},{"address":"0xfe00000000000000000000000000000000000000","topics":["0x0000000000000000000000000000000000000000000000000000746f70696332","0x0000000000000000000000000000000000000000000000000000746f70696331"],"data":"0x","blockNumber":"0x3","transactionHash":"0xdefe471992a07a02acdfbe33edaae22fbb86d7d3cec3f1b8e4e77702fb3acc1d","transactionIndex":"0x0","blockHash":"0x7a7556792ca7d37882882e2b001fe14833eaf81c2c7f865c9c771ec37a024f6b","logIndex":"0x0","removed":false},{"address":"0xfe00000000000000000000000000000000000000","topics":["0x0000000000000000000000000000000000000000000000000000746f70696334"],"data":"0x","blockNumber":"0x3e8","transactionHash":"0x9a87842100a638dfa5da8842b4beda691d2fd77b0c84b57f24ecfa9fb208f747","transactionIndex":"0x0","blockHash":"0xb360bad5265261c075ece02d3bf0e39498a6a76310482cdfd90588748e6c5ee0","logIndex":"0x0","removed":false}]`,
},
{
f: sys.NewRangeFilter(900, 999, []common.Address{contract}, [][]common.Hash{{hash3}}),
},
{
f: sys.NewRangeFilter(990, int64(rpc.LatestBlockNumber), []common.Address{contract2}, [][]common.Hash{{hash3}}),
want: `[{"address":"0xff00000000000000000000000000000000000000","topics":["0x0000000000000000000000000000000000000000000000000000746f70696333"],"data":"0x","blockNumber":"0x3e7","transactionHash":"0x53e3675800c6908424b61b35a44e51ca4c73ca603e58a65b32c67968b4f42200","transactionIndex":"0x0","blockHash":"0x2e4620a2b426b0612ec6cad9603f466723edaed87f98c9137405dd4f7a2409ff","logIndex":"0x0","removed":false}]`,
},
{
f: sys.NewRangeFilter(1, 10, []common.Address{contract}, [][]common.Hash{{hash2}, {hash1}}),
want: `[{"address":"0xfe00000000000000000000000000000000000000","topics":["0x0000000000000000000000000000000000000000000000000000746f70696332","0x0000000000000000000000000000000000000000000000000000746f70696331"],"data":"0x","blockNumber":"0x3","transactionHash":"0xdefe471992a07a02acdfbe33edaae22fbb86d7d3cec3f1b8e4e77702fb3acc1d","transactionIndex":"0x0","blockHash":"0x7a7556792ca7d37882882e2b001fe14833eaf81c2c7f865c9c771ec37a024f6b","logIndex":"0x0","removed":false}]`,
},
{
f: sys.NewRangeFilter(1, 10, nil, [][]common.Hash{{hash1, hash2}}),
want: `[{"address":"0xfe00000000000000000000000000000000000000","topics":["0x0000000000000000000000000000000000000000000000000000746f70696331"],"data":"0x","blockNumber":"0x2","transactionHash":"0xa8028c655b6423204c8edfbc339f57b042d6bec2b6a61145d76b7c08b4cccd42","transactionIndex":"0x0","blockHash":"0x24417bb49ce44cfad65da68f33b510bf2a129c0d89ccf06acb6958b8585ccf34","logIndex":"0x0","removed":false},{"address":"0xff00000000000000000000000000000000000000","topics":["0x0000000000000000000000000000000000000000000000000000746f70696331"],"data":"0x","blockNumber":"0x2","transactionHash":"0xdba3e2ea9a7d690b722d70ee605fd67ba4c00d1d3aecd5cf187a7b92ad8eb3df","transactionIndex":"0x1","blockHash":"0x24417bb49ce44cfad65da68f33b510bf2a129c0d89ccf06acb6958b8585ccf34","logIndex":"0x1","removed":false},{"address":"0xfe00000000000000000000000000000000000000","topics":["0x0000000000000000000000000000000000000000000000000000746f70696332","0x0000000000000000000000000000000000000000000000000000746f70696331"],"data":"0x","blockNumber":"0x3","transactionHash":"0xdefe471992a07a02acdfbe33edaae22fbb86d7d3cec3f1b8e4e77702fb3acc1d","transactionIndex":"0x0","blockHash":"0x7a7556792ca7d37882882e2b001fe14833eaf81c2c7f865c9c771ec37a024f6b","logIndex":"0x0","removed":false}]`,
},
{
f: sys.NewRangeFilter(0, int64(rpc.LatestBlockNumber), nil, [][]common.Hash{{common.BytesToHash([]byte("fail"))}}),
},
{
f: sys.NewRangeFilter(0, int64(rpc.LatestBlockNumber), []common.Address{common.BytesToAddress([]byte("failmenow"))}, nil),
},
{
f: sys.NewRangeFilter(0, int64(rpc.LatestBlockNumber), nil, [][]common.Hash{{common.BytesToHash([]byte("fail"))}, {hash1}}),
},
{
f: sys.NewRangeFilter(int64(rpc.LatestBlockNumber), int64(rpc.LatestBlockNumber), nil, nil),
want: `[{"address":"0xfe00000000000000000000000000000000000000","topics":["0x0000000000000000000000000000000000000000000000000000746f70696334"],"data":"0x","blockNumber":"0x3e8","transactionHash":"0x9a87842100a638dfa5da8842b4beda691d2fd77b0c84b57f24ecfa9fb208f747","transactionIndex":"0x0","blockHash":"0xb360bad5265261c075ece02d3bf0e39498a6a76310482cdfd90588748e6c5ee0","logIndex":"0x0","removed":false}]`,
},
{
f: sys.NewRangeFilter(int64(rpc.FinalizedBlockNumber), int64(rpc.LatestBlockNumber), nil, nil),
want: `[{"address":"0xff00000000000000000000000000000000000000","topics":["0x0000000000000000000000000000000000000000000000000000746f70696333"],"data":"0x","blockNumber":"0x3e7","transactionHash":"0x53e3675800c6908424b61b35a44e51ca4c73ca603e58a65b32c67968b4f42200","transactionIndex":"0x0","blockHash":"0x2e4620a2b426b0612ec6cad9603f466723edaed87f98c9137405dd4f7a2409ff","logIndex":"0x0","removed":false},{"address":"0xfe00000000000000000000000000000000000000","topics":["0x0000000000000000000000000000000000000000000000000000746f70696334"],"data":"0x","blockNumber":"0x3e8","transactionHash":"0x9a87842100a638dfa5da8842b4beda691d2fd77b0c84b57f24ecfa9fb208f747","transactionIndex":"0x0","blockHash":"0xb360bad5265261c075ece02d3bf0e39498a6a76310482cdfd90588748e6c5ee0","logIndex":"0x0","removed":false}]`,
},
{
f: sys.NewRangeFilter(int64(rpc.FinalizedBlockNumber), int64(rpc.FinalizedBlockNumber), nil, nil),
want: `[{"address":"0xff00000000000000000000000000000000000000","topics":["0x0000000000000000000000000000000000000000000000000000746f70696333"],"data":"0x","blockNumber":"0x3e7","transactionHash":"0x53e3675800c6908424b61b35a44e51ca4c73ca603e58a65b32c67968b4f42200","transactionIndex":"0x0","blockHash":"0x2e4620a2b426b0612ec6cad9603f466723edaed87f98c9137405dd4f7a2409ff","logIndex":"0x0","removed":false}]`,
},
{
f: sys.NewRangeFilter(int64(rpc.LatestBlockNumber), int64(rpc.FinalizedBlockNumber), nil, nil),
},
{
f: sys.NewRangeFilter(int64(rpc.SafeBlockNumber), int64(rpc.LatestBlockNumber), nil, nil),
err: "safe header not found",
},
{
f: sys.NewRangeFilter(int64(rpc.SafeBlockNumber), int64(rpc.SafeBlockNumber), nil, nil),
err: "safe header not found",
},
{
f: sys.NewRangeFilter(int64(rpc.LatestBlockNumber), int64(rpc.SafeBlockNumber), nil, nil),
err: "safe header not found",
},
{
f: sys.NewRangeFilter(int64(rpc.PendingBlockNumber), int64(rpc.PendingBlockNumber), nil, nil),
want: `[{"address":"0xfe00000000000000000000000000000000000000","topics":["0x0000000000000000000000000000000000000000000000000000746f70696335"],"data":"0x","blockNumber":"0x3e9","transactionHash":"0x4110587c1b8d86edc85dce929a34127f1cb8809515a9f177c91c866de3eb0638","transactionIndex":"0x0","blockHash":"0xd5e8d4e4eb51a2a2a6ec20ef68a4c2801240743c8deb77a6a1d118ac3eefb725","logIndex":"0x0","removed":false}]`,
},
{
f: sys.NewRangeFilter(int64(rpc.LatestBlockNumber), int64(rpc.PendingBlockNumber), nil, nil),
want: `[{"address":"0xfe00000000000000000000000000000000000000","topics":["0x0000000000000000000000000000000000000000000000000000746f70696334"],"data":"0x","blockNumber":"0x3e8","transactionHash":"0x9a87842100a638dfa5da8842b4beda691d2fd77b0c84b57f24ecfa9fb208f747","transactionIndex":"0x0","blockHash":"0xb360bad5265261c075ece02d3bf0e39498a6a76310482cdfd90588748e6c5ee0","logIndex":"0x0","removed":false},{"address":"0xfe00000000000000000000000000000000000000","topics":["0x0000000000000000000000000000000000000000000000000000746f70696335"],"data":"0x","blockNumber":"0x3e9","transactionHash":"0x4110587c1b8d86edc85dce929a34127f1cb8809515a9f177c91c866de3eb0638","transactionIndex":"0x0","blockHash":"0xd5e8d4e4eb51a2a2a6ec20ef68a4c2801240743c8deb77a6a1d118ac3eefb725","logIndex":"0x0","removed":false}]`,
},
{
f: sys.NewRangeFilter(int64(rpc.PendingBlockNumber), int64(rpc.LatestBlockNumber), nil, nil),
err: errInvalidBlockRange.Error(),
},
} {
logs, err := tc.f.Logs(context.Background())
if err == nil && tc.err != "" {
t.Fatalf("test %d, expected error %q, got nil", i, tc.err)
} else if err != nil && err.Error() != tc.err {
t.Fatalf("test %d, expected error %q, got %q", i, tc.err, err.Error())
}
if tc.want == "" && len(logs) == 0 {
continue
}
have, err := json.Marshal(logs)
if err != nil {
t.Fatal(err)
}
if string(have) != tc.want {
t.Fatalf("test %d, have:\n%s\nwant:\n%s", i, have, tc.want)
}
}
t.Run("timeout", func(t *testing.T) {
f := sys.NewRangeFilter(0, -1, nil, nil)
ctx, cancel := context.WithDeadline(context.Background(), time.Now().Add(-time.Hour))
defer cancel()
_, err := f.Logs(ctx)
if err == nil {
t.Fatal("expected error")
}
if err != context.DeadlineExceeded {
t.Fatalf("expected context.DeadlineExceeded, got %v", err)
}
})
}