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path: root/whisper/whisper_test.go
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// Copyright 2014 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with go-ethereum.  If not, see <http://www.gnu.org/licenses/>.

package whisper

import (
    "testing"
    "time"

    "github.com/ethereum/go-ethereum/p2p"
    "github.com/ethereum/go-ethereum/p2p/discover"
)

func startTestCluster(n int) []*Whisper {
    // Create the batch of simulated peers
    nodes := make([]*p2p.Peer, n)
    for i := 0; i < n; i++ {
        nodes[i] = p2p.NewPeer(discover.NodeID{}, "", nil)
    }
    whispers := make([]*Whisper, n)
    for i := 0; i < n; i++ {
        whispers[i] = New()
        whispers[i].Start()
    }
    // Wire all the peers to the root one
    for i := 1; i < n; i++ {
        src, dst := p2p.MsgPipe()

        go whispers[0].handlePeer(nodes[i], src)
        go whispers[i].handlePeer(nodes[0], dst)
    }
    return whispers
}

func TestSelfMessage(t *testing.T) {
    // Start the single node cluster
    client := startTestCluster(1)[0]

    // Start watching for self messages, signal any arrivals
    self := client.NewIdentity()
    done := make(chan struct{})

    client.Watch(Filter{
        To: &self.PublicKey,
        Fn: func(msg *Message) {
            close(done)
        },
    })
    // Send a dummy message to oneself
    msg := NewMessage([]byte("self whisper"))
    envelope, err := msg.Wrap(DefaultPoW, Options{
        From: self,
        To:   &self.PublicKey,
        TTL:  DefaultTTL,
    })
    if err != nil {
        t.Fatalf("failed to wrap message: %v", err)
    }
    // Dump the message into the system and wait for it to pop back out
    if err := client.Send(envelope); err != nil {
        t.Fatalf("failed to send self-message: %v", err)
    }
    select {
    case <-done:
    case <-time.After(time.Second):
        t.Fatalf("self-message receive timeout")
    }
}

func TestDirectMessage(t *testing.T) {
    // Start the sender-recipient cluster
    cluster := startTestCluster(2)

    sender := cluster[0]
    senderId := sender.NewIdentity()

    recipient := cluster[1]
    recipientId := recipient.NewIdentity()

    // Watch for arriving messages on the recipient
    done := make(chan struct{})
    recipient.Watch(Filter{
        To: &recipientId.PublicKey,
        Fn: func(msg *Message) {
            close(done)
        },
    })
    // Send a dummy message from the sender
    msg := NewMessage([]byte("direct whisper"))
    envelope, err := msg.Wrap(DefaultPoW, Options{
        From: senderId,
        To:   &recipientId.PublicKey,
        TTL:  DefaultTTL,
    })
    if err != nil {
        t.Fatalf("failed to wrap message: %v", err)
    }
    if err := sender.Send(envelope); err != nil {
        t.Fatalf("failed to send direct message: %v", err)
    }
    // Wait for an arrival or a timeout
    select {
    case <-done:
    case <-time.After(time.Second):
        t.Fatalf("direct message receive timeout")
    }
}

func TestAnonymousBroadcast(t *testing.T) {
    testBroadcast(true, t)
}

func TestIdentifiedBroadcast(t *testing.T) {
    testBroadcast(false, t)
}

func testBroadcast(anonymous bool, t *testing.T) {
    // Start the single sender multi recipient cluster
    cluster := startTestCluster(3)

    sender := cluster[1]
    targets := cluster[1:]
    for _, target := range targets {
        if !anonymous {
            target.NewIdentity()
        }
    }
    // Watch for arriving messages on the recipients
    dones := make([]chan struct{}, len(targets))
    for i := 0; i < len(targets); i++ {
        done := make(chan struct{}) // need for the closure
        dones[i] = done

        targets[i].Watch(Filter{
            Topics: NewFilterTopicsFromStringsFlat("broadcast topic"),
            Fn: func(msg *Message) {
                close(done)
            },
        })
    }
    // Send a dummy message from the sender
    msg := NewMessage([]byte("broadcast whisper"))
    envelope, err := msg.Wrap(DefaultPoW, Options{
        Topics: NewTopicsFromStrings("broadcast topic"),
        TTL:    DefaultTTL,
    })
    if err != nil {
        t.Fatalf("failed to wrap message: %v", err)
    }
    if err := sender.Send(envelope); err != nil {
        t.Fatalf("failed to send broadcast message: %v", err)
    }
    // Wait for an arrival on each recipient, or timeouts
    timeout := time.After(time.Second)
    for _, done := range dones {
        select {
        case <-done:
        case <-timeout:
            t.Fatalf("broadcast message receive timeout")
        }
    }
}

func TestMessageExpiration(t *testing.T) {
    // Start the single node cluster and inject a dummy message
    node := startTestCluster(1)[0]

    message := NewMessage([]byte("expiring message"))
    envelope, err := message.Wrap(DefaultPoW, Options{
        TTL: time.Second,
    })
    if err != nil {
        t.Fatalf("failed to wrap message: %v", err)
    }
    if err := node.Send(envelope); err != nil {
        t.Fatalf("failed to inject message: %v", err)
    }
    // Check that the message is inside the cache
    if _, ok := node.messages[envelope.Hash()]; !ok {
        t.Fatalf("message not found in cache")
    }
    // Wait for expiration and check cache again
    time.Sleep(time.Second)     // wait for expiration
    time.Sleep(expirationCycle) // wait for cleanup cycle
    if _, ok := node.messages[envelope.Hash()]; ok {
        t.Fatalf("message not expired from cache")
    }
}