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OtnsTest.go
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OtnsTest.go
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// Copyright (c) 2020, The OTNS Authors.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. Neither the name of the copyright holder nor the
// names of its contributors may be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
package otnstester
import (
"bufio"
"context"
"fmt"
"os"
"strconv"
"strings"
"syscall"
"testing"
"time"
"google.golang.org/grpc/credentials/insecure"
visualize_grpc_pb "github.com/openthread/ot-ns/visualize/grpc/pb"
"google.golang.org/grpc"
"github.com/openthread/ot-ns/dispatcher"
"github.com/stretchr/testify/assert"
"github.com/chzyer/readline"
"github.com/openthread/ot-ns/cli/runcli"
"github.com/openthread/ot-ns/otns_main"
"github.com/openthread/ot-ns/progctx"
. "github.com/openthread/ot-ns/types"
"github.com/openthread/ot-ns/visualize"
"github.com/simonlingoogle/go-simplelogger"
)
var (
stdinPipeFile = "stdin.namedpipe"
stdoutPipeFile = "stdout.namedpipe"
)
type OtnsTest struct {
*testing.T
stdin *os.File
stdout *os.File
otnsDone chan struct{}
pendingOutput chan string
pendingVisualizeEvents chan *visualize_grpc_pb.VisualizeEvent
stdinCloser *readline.CancelableStdin
ctx *progctx.ProgCtx
grpcClient visualize_grpc_pb.VisualizeGrpcServiceClient
visualizeStream visualize_grpc_pb.VisualizeGrpcService_VisualizeClient
}
func (ot *OtnsTest) Go(duration time.Duration) {
seconds := float64(duration) / float64(time.Second)
ot.sendCommand(fmt.Sprintf("go %f", seconds))
ot.expectDone()
}
func (ot *OtnsTest) Join() {
<-ot.otnsDone
}
func (ot *OtnsTest) AddNode(role string) NodeId {
cmd := fmt.Sprintf("add %s", role)
ot.sendCommand(cmd)
return ot.expectCommandResultInt()
}
func (ot *OtnsTest) sendCommand(cmd string) {
simplelogger.Infof("> %s", cmd)
_, err := ot.stdin.WriteString(cmd + "\n")
simplelogger.PanicIfError(err)
}
func (ot *OtnsTest) sendCommandf(format string, args ...interface{}) {
cmd := fmt.Sprintf(format, args...)
ot.sendCommand(cmd)
}
func (ot *OtnsTest) stdoutReadRoutine() {
simplelogger.Infof("OTNS Stdout reader started.")
scanner := bufio.NewScanner(ot.stdout)
scanner.Split(bufio.ScanLines)
for scanner.Scan() {
simplelogger.Infof("read stdout: %#v", scanner.Text())
ot.pendingOutput <- scanner.Text()
}
}
func (ot *OtnsTest) shutdown() {
}
func (ot *OtnsTest) expectDone() {
ot.expectCommandResultLines()
}
func (ot *OtnsTest) expectCommandResultLines() (output []string) {
loop:
for {
line := <-ot.pendingOutput
if line == "Done" {
break loop
} else if strings.HasPrefix(line, "Error") {
simplelogger.Panicf("%s", line)
} else {
output = append(output, line)
}
}
simplelogger.Infof("expectCommandResultLines: %#v", output)
return
}
func (ot *OtnsTest) expectCommandResultInt() int {
lines := ot.expectCommandResultLines()
simplelogger.AssertTrue(len(lines) == 1)
v, err := strconv.Atoi(lines[0])
simplelogger.PanicIfError(err)
return v
}
func (ot *OtnsTest) Shutdown() {
ot.ctx.Cancel(nil)
ot.Join()
}
func (ot *OtnsTest) SetSpeed(speed int) {
ot.sendCommandf("speed %d", speed)
ot.expectDone()
}
func (ot *OtnsTest) Reset() {
ot.SetSpeed(dispatcher.MaxSimulateSpeed)
ot.SetPacketLossRatio(0)
ot.RemoveAllNodes()
}
func (ot *OtnsTest) SetPacketLossRatio(ratio float32) {
ot.sendCommandf("plr %f", ratio)
ot.expectDone()
}
func (ot *OtnsTest) RemoveAllNodes() {
nodes := ot.ListNodes()
simplelogger.Infof("Remove all nodes: %+v", nodes)
for nodeid := range nodes {
ot.DeleteNode(nodeid)
}
}
type NodeInfo struct {
ExtAddr uint64
Rloc16 uint16
X, Y int
Failed bool
}
func (ot *OtnsTest) ListNodes() map[NodeId]*NodeInfo {
ot.sendCommand("nodes")
lines := ot.expectCommandResultLines()
nodes := map[NodeId]*NodeInfo{}
for _, line := range lines {
var err error
var id NodeId
var extaddr uint64
var rloc16 uint16
var x, y int
failed := false
for _, sec := range strings.Split(line, "\t") {
kv := strings.Split(sec, "=")
switch kv[0] {
case "id":
id, err = strconv.Atoi(kv[1])
ot.ExpectNoError(err)
case "extaddr":
extaddr, err = strconv.ParseUint(kv[1], 16, 64)
ot.ExpectNoError(err)
case "rloc16":
var value uint64
value, err = strconv.ParseUint(kv[1], 16, 16)
ot.ExpectNoError(err)
rloc16 = uint16(value)
case "x":
x, err = strconv.Atoi(kv[1])
ot.ExpectNoError(err)
case "y":
y, err = strconv.Atoi(kv[1])
ot.ExpectNoError(err)
case "failed":
ot.ExpectTrue(kv[1] == "false" || kv[1] == "true")
failed = kv[1] == "failed"
}
}
nodes[id] = &NodeInfo{
ExtAddr: extaddr,
Rloc16: rloc16,
X: x,
Y: y,
Failed: failed,
}
}
return nodes
}
func (ot *OtnsTest) ExpectNoError(err error) {
assert.Nil(ot, err, "unexpected error")
if err != nil {
ot.FailNow()
}
}
func (ot *OtnsTest) ExpectTrue(value bool, msgAndArgs ...interface{}) {
assert.True(ot, value, msgAndArgs...)
if !value {
ot.FailNow()
}
}
func (ot *OtnsTest) DeleteNode(ids ...NodeId) {
if len(ids) == 0 {
return
}
cmd := "del"
for _, id := range ids {
cmd = cmd + fmt.Sprintf(" %d", id)
}
ot.executeCommand(cmd)
}
func (ot *OtnsTest) executeCommand(cmd string) []string {
ot.sendCommand(cmd)
return ot.expectCommandResultLines()
}
func (ot *OtnsTest) GetNodeState(id NodeId) string {
lines := ot.executeCommandNodeContext(id, "state")
ot.ExpectTrue(len(lines) == 1)
return lines[0]
}
func (ot *OtnsTest) executeCommandNodeContext(id NodeId, cmd string) []string {
return ot.executeCommand(fmt.Sprintf("node %d \"%s\"", id, cmd))
}
func (ot *OtnsTest) Command(cmd string) []string {
ot.sendCommand(cmd)
return ot.expectCommandResultLines()
}
func (ot *OtnsTest) Commandf(format string, args ...interface{}) []string {
ot.sendCommandf(format, args...)
return ot.expectCommandResultLines()
}
func (ot *OtnsTest) visualizeStreamReadRoutine() {
vctx := ot.visualizeStream.Context()
for vctx.Err() == nil {
evt, err := ot.visualizeStream.Recv()
ot.ExpectTrue(err == nil || ot.visualizeStream.Context().Err() != nil)
if err == nil {
simplelogger.Warnf("Visualize: %+v", evt)
ot.pendingVisualizeEvents <- evt
}
}
}
func (ot *OtnsTest) ExpectVisualizeEvent(match func(evt *visualize_grpc_pb.VisualizeEvent) bool) {
deadline := time.After(time.Second * 10)
for {
select {
case evt := <-ot.pendingVisualizeEvents:
if match(evt) {
return
}
case <-deadline:
ot.ExpectTrue(false, "ExpectVisualizeEvent timeout")
}
}
}
func (ot *OtnsTest) ExpectVisualizeAddNode(nodeid NodeId, x int, y int, radioRange int) {
ot.ExpectVisualizeEvent(func(evt *visualize_grpc_pb.VisualizeEvent) bool {
addNode := evt.GetAddNode()
if addNode == nil {
return false
}
return addNode.NodeId == int32(nodeid) && addNode.X == int32(x) && addNode.Y == int32(y) && addNode.RadioRange == int32(radioRange)
})
}
func NewOtnsTest(t *testing.T) *OtnsTest {
ot := &OtnsTest{
T: t,
otnsDone: make(chan struct{}),
pendingOutput: make(chan string, 1000),
pendingVisualizeEvents: make(chan *visualize_grpc_pb.VisualizeEvent, 1000),
}
os.Args = append(os.Args, "-log", "debug", "-web=false", "-autogo=false")
_ = os.Remove(stdinPipeFile)
_ = os.Remove(stdoutPipeFile)
err := syscall.Mkfifo(stdinPipeFile, 0644)
simplelogger.PanicIfError(err)
ot.stdin, err = os.OpenFile(stdinPipeFile, os.O_RDWR, os.ModeNamedPipe)
simplelogger.PanicIfError(err)
ot.stdinCloser = readline.NewCancelableStdin(ot.stdin)
err = syscall.Mkfifo(stdoutPipeFile, 0644)
simplelogger.PanicIfError(err)
ot.stdout, err = os.OpenFile(stdoutPipeFile, os.O_RDWR, os.ModeNamedPipe)
simplelogger.PanicIfError(err)
ot.ctx = progctx.New(context.Background())
go func() {
defer func() {
simplelogger.Infof("OTNS exited.")
ot.shutdown()
close(ot.otnsDone)
}()
otns_main.Main(ot.ctx, func(ctx *progctx.ProgCtx, args *otns_main.MainArgs) visualize.Visualizer {
return nil
}, &runcli.CliOptions{
EchoInput: false,
Stdin: ot.stdin,
Stdout: ot.stdout,
})
}()
grpcConn, err := grpc.Dial("localhost:8999", grpc.WithTransportCredentials(insecure.NewCredentials()))
ot.ExpectNoError(err)
grpcClient := visualize_grpc_pb.NewVisualizeGrpcServiceClient(grpcConn)
ot.grpcClient = grpcClient
deadline := time.Now().Add(time.Second * 10)
for time.Now().Before(deadline) {
visualizeStream, err := grpcClient.Visualize(ot.ctx, &visualize_grpc_pb.VisualizeRequest{})
if err != nil {
continue
}
ot.visualizeStream = visualizeStream
break
}
go ot.stdoutReadRoutine()
go ot.visualizeStreamReadRoutine()
return ot
}