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package main
import (
"os/exec"
"runtime"
"strings"
"unicode"
"github.com/docker/docker/pkg/homedir"
"github.com/docker/docker/pkg/integration/checker"
"github.com/go-check/check"
)
func (s *DockerSuite) TestHelpTextVerify(c *check.C) {
testRequires(c, DaemonIsLinux)
// Make sure main help text fits within 80 chars and that
// on non-windows system we use ~ when possible (to shorten things).
// Test for HOME set to its default value and set to "/" on linux
// Yes on windows setting up an array and looping (right now) isn't
// necessary because we just have one value, but we'll need the
// array/loop on linux so we might as well set it up so that we can
// test any number of home dirs later on and all we need to do is
// modify the array - the rest of the testing infrastructure should work
homes := []string{homedir.Get()}
// Non-Windows machines need to test for this special case of $HOME
if runtime.GOOS != "windows" {
homes = append(homes, "/")
}
homeKey := homedir.Key()
baseEnvs := appendBaseEnv(true)
// Remove HOME env var from list so we can add a new value later.
for i, env := range baseEnvs {
if strings.HasPrefix(env, homeKey+"=") {
baseEnvs = append(baseEnvs[:i], baseEnvs[i+1:]...)
break
}
}
for _, home := range homes {
// Dup baseEnvs and add our new HOME value
newEnvs := make([]string, len(baseEnvs)+1)
copy(newEnvs, baseEnvs)
newEnvs[len(newEnvs)-1] = homeKey + "=" + home
scanForHome := runtime.GOOS != "windows" && home != "/"
// Check main help text to make sure its not over 80 chars
helpCmd := exec.Command(dockerBinary, "help")
helpCmd.Env = newEnvs
out, _, err := runCommandWithOutput(helpCmd)
c.Assert(err, checker.IsNil, check.Commentf(out))
lines := strings.Split(out, "\n")
foundTooLongLine := false
for _, line := range lines {
if !foundTooLongLine && len(line) > 80 {
c.Logf("Line is too long:\n%s", line)
foundTooLongLine = true
}
// All lines should not end with a space
c.Assert(line, checker.Not(checker.HasSuffix), " ", check.Commentf("Line should not end with a space"))
if scanForHome && strings.Contains(line, `=`+home) {
c.Fatalf("Line should use '%q' instead of %q:\n%s", homedir.GetShortcutString(), home, line)
}
if runtime.GOOS != "windows" {
i := strings.Index(line, homedir.GetShortcutString())
if i >= 0 && i != len(line)-1 && line[i+1] != '/' {
c.Fatalf("Main help should not have used home shortcut:\n%s", line)
}
}
}
// Make sure each cmd's help text fits within 90 chars and that
// on non-windows system we use ~ when possible (to shorten things).
// Pull the list of commands from the "Commands:" section of docker help
helpCmd = exec.Command(dockerBinary, "help")
helpCmd.Env = newEnvs
out, _, err = runCommandWithOutput(helpCmd)
c.Assert(err, checker.IsNil, check.Commentf(out))
i := strings.Index(out, "Commands:")
c.Assert(i, checker.GreaterOrEqualThan, 0, check.Commentf("Missing 'Commands:' in:\n%s", out))
cmds := []string{}
// Grab all chars starting at "Commands:"
helpOut := strings.Split(out[i:], "\n")
// First line is just "Commands:"
if isLocalDaemon {
// Replace first line with "daemon" command since it's not part of the list of commands.
helpOut[0] = " daemon"
} else {
// Skip first line
helpOut = helpOut[1:]
}
// Create the list of commands we want to test
cmdsToTest := []string{}
for _, cmd := range helpOut {
// Stop on blank line or non-idented line
if cmd == "" || !unicode.IsSpace(rune(cmd[0])) {
break
}
// Grab just the first word of each line
cmd = strings.Split(strings.TrimSpace(cmd), " ")[0]
cmds = append(cmds, cmd) // Saving count for later
cmdsToTest = append(cmdsToTest, cmd)
}
// Add some 'two word' commands - would be nice to automatically
// calculate this list - somehow
cmdsToTest = append(cmdsToTest, "volume create")
cmdsToTest = append(cmdsToTest, "volume inspect")
cmdsToTest = append(cmdsToTest, "volume ls")
cmdsToTest = append(cmdsToTest, "volume rm")
for _, cmd := range cmdsToTest {
var stderr string
args := strings.Split(cmd+" --help", " ")
// Check the full usage text
helpCmd := exec.Command(dockerBinary, args...)
helpCmd.Env = newEnvs
out, stderr, _, err = runCommandWithStdoutStderr(helpCmd)
c.Assert(len(stderr), checker.Equals, 0, check.Commentf("Error on %q help. non-empty stderr:%q", cmd, stderr))
c.Assert(out, checker.Not(checker.HasSuffix), "\n\n", check.Commentf("Should not have blank line on %q\n", cmd))
c.Assert(out, checker.Contains, "--help", check.Commentf("All commands should mention '--help'. Command '%v' did not.\n", cmd))
c.Assert(err, checker.IsNil, check.Commentf(out))
// Check each line for lots of stuff
lines := strings.Split(out, "\n")
for _, line := range lines {
c.Assert(len(line), checker.LessOrEqualThan, 107, check.Commentf("Help for %q is too long:\n%s", cmd, line))
if scanForHome && strings.Contains(line, `"`+home) {
c.Fatalf("Help for %q should use ~ instead of %q on:\n%s",
cmd, home, line)
}
i := strings.Index(line, "~")
if i >= 0 && i != len(line)-1 && line[i+1] != '/' {
c.Fatalf("Help for %q should not have used ~:\n%s", cmd, line)
}
// If a line starts with 4 spaces then assume someone
// added a multi-line description for an option and we need
// to flag it
c.Assert(line, checker.Not(checker.HasPrefix), " ", check.Commentf("Help for %q should not have a multi-line option", cmd))
// Options should NOT end with a period
if strings.HasPrefix(line, " -") && strings.HasSuffix(line, ".") {
c.Fatalf("Help for %q should not end with a period: %s", cmd, line)
}
// Options should NOT end with a space
c.Assert(line, checker.Not(checker.HasSuffix), " ", check.Commentf("Help for %q should not end with a space", cmd))
}
// For each command make sure we generate an error
// if we give a bad arg
args = strings.Split(cmd+" --badArg", " ")
out, _, err = dockerCmdWithError(args...)
c.Assert(err, checker.NotNil, check.Commentf(out))
// Be really picky
c.Assert(stderr, checker.Not(checker.HasSuffix), "\n\n", check.Commentf("Should not have a blank line at the end of 'docker rm'\n"))
// Now make sure that each command will print a short-usage
// (not a full usage - meaning no opts section) if we
// are missing a required arg or pass in a bad arg
// These commands will never print a short-usage so don't test
noShortUsage := map[string]string{
"images": "",
"login": "",
"logout": "",
"network": "",
"stats": "",
}
if _, ok := noShortUsage[cmd]; !ok {
// For each command run it w/o any args. It will either return
// valid output or print a short-usage
var dCmd *exec.Cmd
var stdout, stderr string
var args []string
// skipNoArgs are ones that we don't want to try w/o
// any args. Either because it'll hang the test or
// lead to incorrect test result (like false negative).
// Whatever the reason, skip trying to run w/o args and
// jump to trying with a bogus arg.
skipNoArgs := map[string]struct{}{
"daemon": {},
"events": {},
"load": {},
}
ec := 0
if _, ok := skipNoArgs[cmd]; !ok {
args = strings.Split(cmd, " ")
dCmd = exec.Command(dockerBinary, args...)
stdout, stderr, ec, err = runCommandWithStdoutStderr(dCmd)
}
// If its ok w/o any args then try again with an arg
if ec == 0 {
args = strings.Split(cmd+" badArg", " ")
dCmd = exec.Command(dockerBinary, args...)
stdout, stderr, ec, err = runCommandWithStdoutStderr(dCmd)
}
if len(stdout) != 0 || len(stderr) == 0 || ec == 0 || err == nil {
c.Fatalf("Bad output from %q\nstdout:%q\nstderr:%q\nec:%d\nerr:%q", args, stdout, stderr, ec, err)
}
// Should have just short usage
c.Assert(stderr, checker.Contains, "\nUsage:\t", check.Commentf("Missing short usage on %q\n", args))
// But shouldn't have full usage
c.Assert(stderr, checker.Not(checker.Contains), "--help=false", check.Commentf("Should not have full usage on %q\n", args))
c.Assert(stderr, checker.Not(checker.HasSuffix), "\n\n", check.Commentf("Should not have a blank line on %q\n", args))
}
}
// Number of commands for standard release and experimental release
standard := 41
experimental := 1
expected := standard + experimental
if isLocalDaemon {
expected++ // for the daemon command
}
c.Assert(len(cmds), checker.LessOrEqualThan, expected, check.Commentf("Wrong # of cmds, it should be: %d\nThe list:\n%q", expected, cmds))
}
}
func (s *DockerSuite) TestHelpExitCodesHelpOutput(c *check.C) {
testRequires(c, DaemonIsLinux)
// Test to make sure the exit code and output (stdout vs stderr) of
// various good and bad cases are what we expect
// docker : stdout=all, stderr=empty, rc=0
out, _, err := dockerCmdWithError()
c.Assert(err, checker.IsNil, check.Commentf(out))
// Be really pick
c.Assert(out, checker.Not(checker.HasSuffix), "\n\n", check.Commentf("Should not have a blank line at the end of 'docker'\n"))
// docker help: stdout=all, stderr=empty, rc=0
out, _, err = dockerCmdWithError("help")
c.Assert(err, checker.IsNil, check.Commentf(out))
// Be really pick
c.Assert(out, checker.Not(checker.HasSuffix), "\n\n", check.Commentf("Should not have a blank line at the end of 'docker help'\n"))
// docker --help: stdout=all, stderr=empty, rc=0
out, _, err = dockerCmdWithError("--help")
c.Assert(err, checker.IsNil, check.Commentf(out))
// Be really pick
c.Assert(out, checker.Not(checker.HasSuffix), "\n\n", check.Commentf("Should not have a blank line at the end of 'docker --help'\n"))
// docker inspect busybox: stdout=all, stderr=empty, rc=0
// Just making sure stderr is empty on valid cmd
out, _, err = dockerCmdWithError("inspect", "busybox")
c.Assert(err, checker.IsNil, check.Commentf(out))
// Be really pick
c.Assert(out, checker.Not(checker.HasSuffix), "\n\n", check.Commentf("Should not have a blank line at the end of 'docker inspect busyBox'\n"))
// docker rm: stdout=empty, stderr=all, rc!=0
// testing the min arg error msg
cmd := exec.Command(dockerBinary, "rm")
stdout, stderr, _, err := runCommandWithStdoutStderr(cmd)
c.Assert(err, checker.NotNil)
c.Assert(stdout, checker.Equals, "")
// Should not contain full help text but should contain info about
// # of args and Usage line
c.Assert(stderr, checker.Contains, "requires a minimum", check.Commentf("Missing # of args text from 'docker rm'\n"))
// docker rm NoSuchContainer: stdout=empty, stderr=all, rc=0
// testing to make sure no blank line on error
cmd = exec.Command(dockerBinary, "rm", "NoSuchContainer")
stdout, stderr, _, err = runCommandWithStdoutStderr(cmd)
c.Assert(err, checker.NotNil)
c.Assert(len(stderr), checker.Not(checker.Equals), 0)
c.Assert(stdout, checker.Equals, "")
// Be really picky
c.Assert(stderr, checker.Not(checker.HasSuffix), "\n\n", check.Commentf("Should not have a blank line at the end of 'docker rm'\n"))
// docker BadCmd: stdout=empty, stderr=all, rc=0
cmd = exec.Command(dockerBinary, "BadCmd")
stdout, stderr, _, err = runCommandWithStdoutStderr(cmd)
c.Assert(err, checker.NotNil)
c.Assert(stdout, checker.Equals, "")
c.Assert(stderr, checker.Equals, "docker: 'BadCmd' is not a docker command.\nSee 'docker --help'.\n", check.Commentf("Unexcepted output for 'docker badCmd'\n"))
}
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