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// Copyright (C) MongoDB, Inc. 2017-present.
//
// 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
package drivertest
import (
"errors"
"net"
"time"
)
// ChannelNetConn implements the net.Conn interface by reading and writing wire messages to a channel.
type ChannelNetConn struct {
WriteErr error
Written chan []byte
ReadResp chan []byte
ReadErr chan error
}
// Read reads data from the connection
func (c *ChannelNetConn) Read(b []byte) (int, error) {
var wm []byte
var err error
select {
case wm = <-c.ReadResp:
case err = <-c.ReadErr:
}
return copy(b, wm), err
}
// Write writes data to the connection.
func (c *ChannelNetConn) Write(b []byte) (int, error) {
copyBuf := make([]byte, len(b))
copy(copyBuf, b)
select {
case c.Written <- copyBuf:
default:
c.WriteErr = errors.New("could not write wm to Written channel")
}
return len(b), c.WriteErr
}
// Close closes the connection.
func (c *ChannelNetConn) Close() error {
return nil
}
// LocalAddr returns the local network address.
func (c *ChannelNetConn) LocalAddr() net.Addr {
return nil
}
// RemoteAddr returns the remote network address.
func (c *ChannelNetConn) RemoteAddr() net.Addr {
return nil
}
// SetDeadline sets the read and write deadlines associated with the connection.
func (c *ChannelNetConn) SetDeadline(_ time.Time) error {
return nil
}
// SetReadDeadline sets the read and write deadlines associated with the connection.
func (c *ChannelNetConn) SetReadDeadline(_ time.Time) error {
return nil
}
// SetWriteDeadline sets the read and write deadlines associated with the connection.
func (c *ChannelNetConn) SetWriteDeadline(_ time.Time) error {
return nil
}
// GetWrittenMessage gets the last wire message written to the connection
func (c *ChannelNetConn) GetWrittenMessage() []byte {
select {
case wm := <-c.Written:
return wm
default:
return nil
}
}
// AddResponse adds a response to the connection.
func (c *ChannelNetConn) AddResponse(resp []byte) error {
select {
case c.ReadResp <- resp[:4]:
default:
return errors.New("could not write length bytes")
}
select {
case c.ReadResp <- resp[4:]:
default:
return errors.New("could not write response bytes")
}
return nil
}
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