// Contains some common utility functions for testing.

package whisper

import (
	"fmt"
	"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),
		},
	}
}