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// Contains some common utility functions for testing.
package whisper
import (
"bytes"
"fmt"
"io/ioutil"
"math/rand"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/p2p/discover"
)
// randomNodeID generates and returns a random P2P discovery node id for the
// whisper tests.
func randomNodeID() (id discover.NodeID) {
for i := range id {
id[i] = byte(rand.Intn(255))
}
return id
}
// randomNodeName generates and returns a random P2P node name for the whisper
// tests.
func randomNodeName() string {
return common.MakeName(fmt.Sprintf("whisper-go-test-%3d", rand.Intn(999)), "1.0")
}
// whisperCaps returns the node capabilities for running the whisper sub-protocol.
func whisperCaps() []p2p.Cap {
return []p2p.Cap{
p2p.Cap{
Name: protocolName,
Version: uint(protocolVersion),
},
}
}
// bufMsgPipe creates a buffered message pipe between two endpoints.
func bufMsgPipe() (*p2p.MsgPipeRW, *p2p.MsgPipeRW) {
A, midA := p2p.MsgPipe()
midB, B := p2p.MsgPipe()
go copyMsgPipe(midA, midB)
go copyMsgPipe(midB, midA)
return A, B
}
// copyMsgPipe copies messages from the src pipe to the dest.
func copyMsgPipe(dst, src *p2p.MsgPipeRW) {
defer dst.Close()
for {
msg, err := src.ReadMsg()
if err != nil {
return
}
data, err := ioutil.ReadAll(msg.Payload)
if err != nil {
return
}
msg.Payload = bytes.NewReader(data)
if err := dst.WriteMsg(msg); err != nil {
return
}
}
}
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