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package main

import (

"bufio"

"os/exec"

"strings"

"testing"

"time"

)

func TestExec(t *testing.T) {

runCmd := exec.Command(dockerBinary, "run", "-d", "--name", "testing", "busybox", "sh", "-c", "echo test > /tmp/file && sleep 100")

out, _, _, err := runCommandWithStdoutStderr(runCmd)

errorOut(err, t, out)

execCmd := exec.Command(dockerBinary, "exec", "testing", "cat", "/tmp/file")

out, _, err = runCommandWithOutput(execCmd)

errorOut(err, t, out)

out = strings.Trim(out, "\r\n")

if expected := "test"; out != expected {

t.Errorf("container exec should've printed %q but printed %q", expected, out)

}

deleteAllContainers()

logDone("exec - basic test")

}

func TestExecInteractive(t *testing.T) {

runCmd := exec.Command(dockerBinary, "run", "-d", "--name", "testing", "busybox", "sh", "-c", "echo test > /tmp/file && sleep 100")

out, _, _, err := runCommandWithStdoutStderr(runCmd)

errorOut(err, t, out)

execCmd := exec.Command(dockerBinary, "exec", "-i", "testing", "sh")

stdin, err := execCmd.StdinPipe()

if err != nil {

t.Fatal(err)

}

stdout, err := execCmd.StdoutPipe()

if err != nil {

t.Fatal(err)

}

if err := execCmd.Start(); err != nil {

t.Fatal(err)

}

if _, err := stdin.Write([]byte("cat /tmp/file\n")); err != nil {

t.Fatal(err)

}

r := bufio.NewReader(stdout)

line, err := r.ReadString('\n')

if err != nil {

t.Fatal(err)

}

line = strings.TrimSpace(line)

if line != "test" {

t.Fatalf("Output should be 'test', got '%q'", line)

}

if err := stdin.Close(); err != nil {

t.Fatal(err)

}

finish := make(chan struct{})

go func() {

if err := execCmd.Wait(); err != nil {

t.Fatal(err)

}

close(finish)

}()

select {

case <-finish:

case <-time.After(1 * time.Second):

t.Fatal("docker exec failed to exit on stdin close")

}

deleteAllContainers()

logDone("exec - Interactive test")

}

func TestExecAfterContainerRestart(t *testing.T) {

runCmd := exec.Command(dockerBinary, "run", "-d", "busybox", "top")

out, _, err := runCommandWithOutput(runCmd)

errorOut(err, t, out)

cleanedContainerID := stripTrailingCharacters(out)

runCmd = exec.Command(dockerBinary, "restart", cleanedContainerID)

out, _, err = runCommandWithOutput(runCmd)

errorOut(err, t, out)

runCmd = exec.Command(dockerBinary, "exec", cleanedContainerID, "echo", "hello")

out, _, err = runCommandWithOutput(runCmd)

errorOut(err, t, out)

outStr := strings.TrimSpace(out)

if outStr != "hello" {

t.Errorf("container should've printed hello, instead printed %q", outStr)

}

deleteAllContainers()

logDone("exec - exec running container after container restart")

}

func TestExecAfterDaemonRestart(t *testing.T) {

d := NewDaemon(t)

if err := d.StartWithBusybox(); err != nil {

t.Fatalf("Could not start daemon with busybox: %v", err)

}

defer d.Stop()

if out, err := d.Cmd("run", "-d", "--name", "top", "-p", "80", "busybox:latest", "top"); err != nil {

t.Fatalf("Could not run top: err=%v\n%s", err, out)

}

if err := d.Restart(); err != nil {

t.Fatalf("Could not restart daemon: %v", err)

}

if out, err := d.Cmd("start", "top"); err != nil {

t.Fatalf("Could not start top after daemon restart: err=%v\n%s", err, out)

}

out, err := d.Cmd("exec", "top", "echo", "hello")

if err != nil {

t.Fatalf("Could not exec on container top: err=%v\n%s", err, out)

}

outStr := strings.TrimSpace(string(out))

if outStr != "hello" {

t.Errorf("container should've printed hello, instead printed %q", outStr)

}

logDone("exec - exec running container after daemon restart")

}