mirror of https://github.com/grpc/grpc-go.git
69 lines
1.9 KiB
Go
69 lines
1.9 KiB
Go
/*
|
|
*
|
|
* Copyright 2020 gRPC authors.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package testutils
|
|
|
|
import (
|
|
"errors"
|
|
"time"
|
|
)
|
|
|
|
// ErrRecvTimeout is an error to indicate that a receive operation on the
|
|
// channel timed out.
|
|
var ErrRecvTimeout = errors.New("timed out when waiting for value on channel")
|
|
|
|
const (
|
|
// DefaultChanRecvTimeout is the default timeout for receive operations on the
|
|
// underlying channel.
|
|
DefaultChanRecvTimeout = 1 * time.Second
|
|
// DefaultChanBufferSize is the default buffer size of the underlying channel.
|
|
DefaultChanBufferSize = 1
|
|
)
|
|
|
|
// Channel wraps a generic channel and provides a timed receive operation.
|
|
type Channel struct {
|
|
ch chan interface{}
|
|
}
|
|
|
|
// Send sends value on the underlying channel.
|
|
func (cwt *Channel) Send(value interface{}) {
|
|
cwt.ch <- value
|
|
}
|
|
|
|
// Receive returns the value received on the underlying channel, or
|
|
// ErrRecvTimeout if DefaultChanRecvTimeout amount of time elapses.
|
|
func (cwt *Channel) Receive() (interface{}, error) {
|
|
timer := time.NewTimer(DefaultChanRecvTimeout)
|
|
select {
|
|
case <-timer.C:
|
|
return nil, ErrRecvTimeout
|
|
case got := <-cwt.ch:
|
|
timer.Stop()
|
|
return got, nil
|
|
}
|
|
}
|
|
|
|
// NewChannel returns a new Channel.
|
|
func NewChannel() *Channel {
|
|
return NewChannelWithSize(DefaultChanBufferSize)
|
|
}
|
|
|
|
// NewChannelWithSize returns a new Channel with a buffer of bufSize.
|
|
func NewChannelWithSize(bufSize int) *Channel {
|
|
return &Channel{ch: make(chan interface{}, bufSize)}
|
|
}
|