144 lines
2.6 KiB
Go
144 lines
2.6 KiB
Go
package main
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import (
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"bytes"
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"context"
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"io"
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"log"
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"net/http"
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"net/http/httptest"
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"os"
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"os/exec"
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"strings"
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"syscall"
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"testing"
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"time"
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"github.com/gorilla/websocket"
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"github.com/stretchr/testify/require"
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"gitlab.com/slon/shad-go/tools/testtool"
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)
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const importPath = "gitlab.com/slon/shad-go/wscat"
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var binCache testtool.BinCache
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func TestMain(m *testing.M) {
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os.Exit(func() int {
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var teardown testtool.CloseFunc
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binCache, teardown = testtool.NewBinCache()
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defer teardown()
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return m.Run()
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}())
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}
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type Conn struct {
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in io.WriteCloser
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out *bytes.Buffer
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}
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func startCommand(t *testing.T, addr string) (conn *Conn, stop func()) {
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t.Helper()
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binary, err := binCache.GetBinary(importPath)
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require.NoError(t, err)
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cmd := exec.Command(binary, "-addr", addr)
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cmd.Stderr = os.Stderr
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out := &bytes.Buffer{}
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cmd.Stdout = out
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stdin, err := cmd.StdinPipe()
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require.NoError(t, err)
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require.NoError(t, cmd.Start())
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conn = &Conn{
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in: stdin,
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out: out,
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}
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done := make(chan struct{})
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go func() {
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_ = cmd.Wait()
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close(done)
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}()
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stop = func() {
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defer func() {
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_ = cmd.Process.Kill()
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<-done
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}()
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// try killing softly
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_ = cmd.Process.Signal(syscall.SIGTERM)
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ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond*100)
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defer cancel()
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select {
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case <-done:
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case <-ctx.Done():
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t.Fatalf("client shutdown timed out")
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}
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}
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require.NoError(t, err)
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return
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}
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func TestWScat(t *testing.T) {
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upgrader := websocket.Upgrader{}
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var received, sent [][]byte
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h := func(w http.ResponseWriter, r *http.Request) {
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c, err := upgrader.Upgrade(w, r, nil)
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if err != nil {
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log.Print("upgrade:", err)
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return
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}
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defer func() { _ = c.Close() }()
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for {
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_, message, err := c.ReadMessage()
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if err != nil {
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t.Logf("error reading message: %s", err)
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break
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}
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received = append(received, message)
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resp := []byte(testtool.RandomName())
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err = c.WriteMessage(websocket.TextMessage, resp)
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require.NoError(t, err)
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sent = append(sent, resp)
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}
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}
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s := httptest.NewServer(http.HandlerFunc(h))
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defer s.Close()
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wsURL := strings.Replace(s.URL, "http", "ws", 1)
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t.Logf("starting ws server %s", wsURL)
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conn, stop := startCommand(t, wsURL)
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defer stop()
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var in [][]byte
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for i := 0; i < 100; i++ {
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msg := []byte(testtool.RandomName())
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in = append(in, msg)
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_, err := conn.in.Write(append(msg, '\n'))
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require.NoError(t, err)
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}
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// give client time to make a request
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time.Sleep(time.Millisecond * 100)
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stop()
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require.Equal(t, bytes.Join(in, nil), bytes.Join(received, nil))
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require.Equal(t, bytes.Join(sent, nil), conn.out.Bytes())
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}
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