path: root/p2p/simulations/adapters/inproc_test.go

// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library 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.
//
// The go-ethereum library 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 the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package adapters

import (
    "bytes"
    "encoding/binary"
    "fmt"
    "testing"
    "time"

    "github.com/ethereum/go-ethereum/p2p/simulations/pipes"
)

func TestTCPPipe(t *testing.T) {
    c1, c2, err := pipes.TCPPipe()
    if err != nil {
        t.Fatal(err)
    }

    done := make(chan struct{})

    go func() {
        msgs := 50
        size := 1024
        for i := 0; i < msgs; i++ {
            msg := make([]byte, size)
            _ = binary.PutUvarint(msg, uint64(i))

            _, err := c1.Write(msg)
            if err != nil {
                t.Fatal(err)
            }
        }

        for i := 0; i < msgs; i++ {
            msg := make([]byte, size)
            _ = binary.PutUvarint(msg, uint64(i))

            out := make([]byte, size)
            _, err := c2.Read(out)
            if err != nil {
                t.Fatal(err)
            }

            if !bytes.Equal(msg, out) {
                t.Fatalf("expected %#v, got %#v", msg, out)
            }
        }
        done <- struct{}{}
    }()

    select {
    case <-done:
    case <-time.After(5 * time.Second):
        t.Fatal("test timeout")
    }
}

func TestTCPPipeBidirections(t *testing.T) {
    c1, c2, err := pipes.TCPPipe()
    if err != nil {
        t.Fatal(err)
    }

    done := make(chan struct{})

    go func() {
        msgs := 50
        size := 7
        for i := 0; i < msgs; i++ {
            msg := []byte(fmt.Sprintf("ping %02d", i))

            _, err := c1.Write(msg)
            if err != nil {
                t.Fatal(err)
            }
        }

        for i := 0; i < msgs; i++ {
            expected := []byte(fmt.Sprintf("ping %02d", i))

            out := make([]byte, size)
            _, err := c2.Read(out)
            if err != nil {
                t.Fatal(err)
            }

            if !bytes.Equal(expected, out) {
                t.Fatalf("expected %#v, got %#v", out, expected)
            } else {
                msg := []byte(fmt.Sprintf("pong %02d", i))
                _, err := c2.Write(msg)
                if err != nil {
                    t.Fatal(err)
                }
            }
        }

        for i := 0; i < msgs; i++ {
            expected := []byte(fmt.Sprintf("pong %02d", i))

            out := make([]byte, size)
            _, err := c1.Read(out)
            if err != nil {
                t.Fatal(err)
            }

            if !bytes.Equal(expected, out) {
                t.Fatalf("expected %#v, got %#v", out, expected)
            }
        }
        done <- struct{}{}
    }()

    select {
    case <-done:
    case <-time.After(5 * time.Second):
        t.Fatal("test timeout")
    }
}

func TestNetPipe(t *testing.T) {
    c1, c2, err := pipes.NetPipe()
    if err != nil {
        t.Fatal(err)
    }

    done := make(chan struct{})

    go func() {
        msgs := 50
        size := 1024
        // netPipe is blocking, so writes are emitted asynchronously
        go func() {
            for i := 0; i < msgs; i++ {
                msg := make([]byte, size)
                _ = binary.PutUvarint(msg, uint64(i))

                _, err := c1.Write(msg)
                if err != nil {
                    t.Fatal(err)
                }
            }
        }()

        for i := 0; i < msgs; i++ {
            msg := make([]byte, size)
            _ = binary.PutUvarint(msg, uint64(i))

            out := make([]byte, size)
            _, err := c2.Read(out)
            if err != nil {
                t.Fatal(err)
            }

            if !bytes.Equal(msg, out) {
                t.Fatalf("expected %#v, got %#v", msg, out)
            }
        }

        done <- struct{}{}
    }()

    select {
    case <-done:
    case <-time.After(5 * time.Second):
        t.Fatal("test timeout")
    }
}

func TestNetPipeBidirections(t *testing.T) {
    c1, c2, err := pipes.NetPipe()
    if err != nil {
        t.Fatal(err)
    }

    done := make(chan struct{})

    go func() {
        msgs := 1000
        size := 8
        pingTemplate := "ping %03d"
        pongTemplate := "pong %03d"

        // netPipe is blocking, so writes are emitted asynchronously
        go func() {
            for i := 0; i < msgs; i++ {
                msg := []byte(fmt.Sprintf(pingTemplate, i))

                _, err := c1.Write(msg)
                if err != nil {
                    t.Fatal(err)
                }
            }
        }()

        // netPipe is blocking, so reads for pong are emitted asynchronously
        go func() {
            for i := 0; i < msgs; i++ {
                expected := []byte(fmt.Sprintf(pongTemplate, i))

                out := make([]byte, size)
                _, err := c1.Read(out)
                if err != nil {
                    t.Fatal(err)
                }

                if !bytes.Equal(expected, out) {
                    t.Fatalf("expected %#v, got %#v", expected, out)
                }
            }

            done <- struct{}{}
        }()

        // expect to read pings, and respond with pongs to the alternate connection
        for i := 0; i < msgs; i++ {
            expected := []byte(fmt.Sprintf(pingTemplate, i))

            out := make([]byte, size)
            _, err := c2.Read(out)
            if err != nil {
                t.Fatal(err)
            }

            if !bytes.Equal(expected, out) {
                t.Fatalf("expected %#v, got %#v", expected, out)
            } else {
                msg := []byte(fmt.Sprintf(pongTemplate, i))

                _, err := c2.Write(msg)
                if err != nil {
                    t.Fatal(err)
                }
            }
        }
    }()

    select {
    case <-done:
    case <-time.After(5 * time.Second):
        t.Fatal("test timeout")
    }
}