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package main

import (

"bufio"

"os"

"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")

if out, _, _, err := runCommandWithStdoutStderr(runCmd); err != nil {

t.Fatal(out, err)

}

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

out, _, err := runCommandWithOutput(execCmd)

if err != nil {

t.Fatal(out, err)

}

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 TestExecInteractiveStdinClose(t *testing.T) {

defer deleteAllContainers()

out, _, err := runCommandWithOutput(exec.Command(dockerBinary, "run", "-itd", "busybox", "/bin/cat"))

if err != nil {

t.Fatal(err)

}

contId := strings.TrimSpace(out)

returnchan := make(chan struct{})

go func() {

var err error

cmd := exec.Command(dockerBinary, "exec", "-i", contId, "/bin/ls", "/")

cmd.Stdin = os.Stdin

if err != nil {

t.Fatal(err)

}

out, err := cmd.CombinedOutput()

if err != nil {

t.Fatal(err, out)

}

if string(out) == "" {

t.Fatalf("Output was empty, likely blocked by standard input")

}

returnchan <- struct{}{}

}()

select {

case <-returnchan:

case <-time.After(10 * time.Second):

t.Fatal("timed out running docker exec")

}

logDone("exec - interactive mode closes stdin after execution")

}

func TestExecInteractive(t *testing.T) {

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

if out, _, _, err := runCommandWithStdoutStderr(runCmd); err != nil {

t.Fatal(out, err)

}

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)

if err != nil {

t.Fatal(out, err)

}

cleanedContainerID := stripTrailingCharacters(out)

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

if out, _, err = runCommandWithOutput(runCmd); err != nil {

t.Fatal(out, err)

}

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

out, _, err = runCommandWithOutput(runCmd)

if err != nil {

t.Fatal(out, err)

}

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")

}

// Regresssion test for #9155, #9044

func TestExecEnv(t *testing.T) {

defer deleteAllContainers()

runCmd := exec.Command(dockerBinary, "run",

"-e", "LALA=value1",

"-e", "LALA=value2",

"-d", "--name", "testing", "busybox", "top")

if out, _, _, err := runCommandWithStdoutStderr(runCmd); err != nil {

t.Fatal(out, err)

}

execCmd := exec.Command(dockerBinary, "exec", "testing", "env")

out, _, err := runCommandWithOutput(execCmd)

if err != nil {

t.Fatal(out, err)

}

if strings.Contains(out, "LALA=value1") ||

!strings.Contains(out, "LALA=value2") ||

!strings.Contains(out, "HOME=/root") {

t.Errorf("exec env(%q), expect %q, %q", out, "LALA=value2", "HOME=/root")

}

logDone("exec - exec inherits correct env")

}

func TestExecExitStatus(t *testing.T) {

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

if out, _, _, err := runCommandWithStdoutStderr(runCmd); err != nil {

t.Fatal(out, err)

}

// Test normal (non-detached) case first

cmd := exec.Command(dockerBinary, "exec", "top", "sh", "-c", "exit 23")

ec, _ := runCommand(cmd)

if ec != 23 {

t.Fatalf("Should have had an ExitCode of 23, not: %d", ec)

}

logDone("exec - exec non-zero ExitStatus")

}