package main import ( "os" "os/exec" "runtime" "strings" "testing" "unicode" "github.com/docker/docker/pkg/homedir" ) func TestHelpTextVerify(t *testing.T) { // 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 := os.Environ() // 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, ec, err := runCommandWithOutput(helpCmd) if err != nil || ec != 0 { t.Fatalf("docker help should have worked\nout:%s\nec:%d", out, ec) } lines := strings.Split(out, "\n") for _, line := range lines { if len(line) > 80 { t.Fatalf("Line is too long(%d chars):\n%s", len(line), line) } if scanForHome && strings.Contains(line, `=`+home) { t.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] != '/' { t.Fatalf("Main help should not have used home shortcut:\n%s", line) } } } // Make sure each cmd's help text fits within 80 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, ec, err = runCommandWithOutput(helpCmd) if err != nil || ec != 0 { t.Fatalf("docker help should have worked\nout:%s\nec:%d", out, ec) } i := strings.Index(out, "Commands:") if i < 0 { t.Fatalf("Missing 'Commands:' in:\n%s", out) } // Grab all chars starting at "Commands:" // Skip first line, its "Commands:" cmds := []string{} for _, cmd := range strings.Split(out[i:], "\n")[1:] { // 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) helpCmd := exec.Command(dockerBinary, cmd, "--help") helpCmd.Env = newEnvs out, ec, err := runCommandWithOutput(helpCmd) if err != nil || ec != 0 { t.Fatalf("Error on %q help: %s\nexit code:%d", cmd, out, ec) } lines := strings.Split(out, "\n") for _, line := range lines { if len(line) > 80 { t.Fatalf("Help for %q is too long(%d chars):\n%s", cmd, len(line), line) } if scanForHome && strings.Contains(line, `"`+home) { t.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] != '/' { t.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 if strings.HasPrefix(line, " ") { t.Fatalf("Help for %q should not have a multi-line option: %s", cmd, line) } // Options should NOT end with a period if strings.HasPrefix(line, " -") && strings.HasSuffix(line, ".") { t.Fatalf("Help for %q should not end with a period: %s", cmd, line) } // Options should not end with a space if strings.HasSuffix(line, " ") { t.Fatalf("Help for %q should not end with a space: %s", cmd, line) } } } expected := 39 if len(cmds) != expected { t.Fatalf("Wrong # of cmds(%d), it should be: %d\nThe list:\n%q", len(cmds), expected, cmds) } } logDone("help - verify text") }