96 lines
2.7 KiB
Go
96 lines
2.7 KiB
Go
// Copyright 2018 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package v3rpc
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import (
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"bytes"
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"math"
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"testing"
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pb "go.etcd.io/etcd/etcdserver/etcdserverpb"
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"go.etcd.io/etcd/mvcc/mvccpb"
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)
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func TestSendFragment(t *testing.T) {
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tt := []struct {
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wr *pb.WatchResponse
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maxRequestBytes int
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fragments int
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werr error
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}{
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{ // large limit should not fragment
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wr: createResponse(100, 1),
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maxRequestBytes: math.MaxInt32,
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fragments: 1,
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},
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{ // large limit for two messages, expect no fragment
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wr: createResponse(10, 2),
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maxRequestBytes: 50,
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fragments: 1,
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},
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{ // limit is small but only one message, expect no fragment
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wr: createResponse(1024, 1),
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maxRequestBytes: 1,
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fragments: 1,
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},
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{ // exceed limit only when combined, expect fragments
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wr: createResponse(11, 5),
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maxRequestBytes: 20,
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fragments: 5,
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},
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{ // 5 events with each event exceeding limits, expect fragments
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wr: createResponse(15, 5),
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maxRequestBytes: 10,
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fragments: 5,
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},
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{ // 4 events with some combined events exceeding limits
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wr: createResponse(10, 4),
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maxRequestBytes: 35,
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fragments: 2,
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},
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}
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for i := range tt {
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fragmentedResp := make([]*pb.WatchResponse, 0)
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testSend := func(wr *pb.WatchResponse) error {
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fragmentedResp = append(fragmentedResp, wr)
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return nil
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}
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err := sendFragments(tt[i].wr, tt[i].maxRequestBytes, testSend)
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if err != tt[i].werr {
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t.Errorf("#%d: expected error %v, got %v", i, tt[i].werr, err)
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}
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got := len(fragmentedResp)
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if got != tt[i].fragments {
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t.Errorf("#%d: expected response number %d, got %d", i, tt[i].fragments, got)
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}
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if got > 0 && fragmentedResp[got-1].Fragment {
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t.Errorf("#%d: expected fragment=false in last response, got %+v", i, fragmentedResp[got-1])
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}
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}
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}
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func createResponse(dataSize, events int) (resp *pb.WatchResponse) {
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resp = &pb.WatchResponse{Events: make([]*mvccpb.Event, events)}
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for i := range resp.Events {
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resp.Events[i] = &mvccpb.Event{
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Kv: &mvccpb.KeyValue{
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Key: bytes.Repeat([]byte("a"), dataSize),
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},
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}
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}
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return resp
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}
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