github.com/lfch/etcd-io/tests/v3@v3.0.0-20221004140520-eac99acd3e9d/framework/testutils/helpters.go (about)

     1  // Copyright 2022 The etcd Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package testutils
    16  
    17  import (
    18  	"errors"
    19  	"time"
    20  
    21  	clientv3 "github.com/lfch/etcd-io/client/v3"
    22  )
    23  
    24  type KV struct {
    25  	Key, Val string
    26  }
    27  
    28  func KeysFromGetResponse(resp *clientv3.GetResponse) (kvs []string) {
    29  	for _, kv := range resp.Kvs {
    30  		kvs = append(kvs, string(kv.Key))
    31  	}
    32  	return kvs
    33  }
    34  
    35  func KeyValuesFromGetResponse(resp *clientv3.GetResponse) (kvs []KV) {
    36  	for _, kv := range resp.Kvs {
    37  		kvs = append(kvs, KV{Key: string(kv.Key), Val: string(kv.Value)})
    38  	}
    39  	return kvs
    40  }
    41  
    42  func KeyValuesFromWatchResponse(resp clientv3.WatchResponse) (kvs []KV) {
    43  	for _, event := range resp.Events {
    44  		kvs = append(kvs, KV{Key: string(event.Kv.Key), Val: string(event.Kv.Value)})
    45  	}
    46  	return kvs
    47  }
    48  
    49  func KeyValuesFromWatchChan(wch clientv3.WatchChan, wantedLen int, timeout time.Duration) (kvs []KV, err error) {
    50  	for {
    51  		select {
    52  		case watchResp, ok := <-wch:
    53  			if ok {
    54  				kvs = append(kvs, KeyValuesFromWatchResponse(watchResp)...)
    55  				if len(kvs) == wantedLen {
    56  					return kvs, nil
    57  				}
    58  			}
    59  		case <-time.After(timeout):
    60  			return nil, errors.New("closed watcher channel should not block")
    61  		}
    62  	}
    63  }