Pull in go-flags, modified to build on Solaris

github.com/jessevdk/go-flags/help_test.go

@@ -0,0 +1,153 @@
+package flags
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"testing"
+	"time"
+)
+
+func helpDiff(a, b string) (string, error) {
+	atmp, err := ioutil.TempFile("", "help-diff")
+
+	if err != nil {
+		return "", err
+	}
+
+	btmp, err := ioutil.TempFile("", "help-diff")
+
+	if err != nil {
+		return "", err
+	}
+
+	if _, err := io.WriteString(atmp, a); err != nil {
+		return "", err
+	}
+
+	if _, err := io.WriteString(btmp, b); err != nil {
+		return "", err
+	}
+
+	ret, err := exec.Command("diff", "-u", "-d", "--label", "got", atmp.Name(), "--label", "expected", btmp.Name()).Output()
+
+	os.Remove(atmp.Name())
+	os.Remove(btmp.Name())
+
+	return string(ret), nil
+}
+
+type helpOptions struct {
+	Verbose  []bool       `short:"v" long:"verbose" description:"Show verbose debug information" ini-name:"verbose"`
+	Call     func(string) `short:"c" description:"Call phone number" ini-name:"call"`
+	PtrSlice []*string    `long:"ptrslice" description:"A slice of pointers to string"`
+
+	OnlyIni string `ini-name:"only-ini" description:"Option only available in ini"`
+
+	Other struct {
+		StringSlice []string       `short:"s" description:"A slice of strings"`
+		IntMap      map[string]int `long:"intmap" description:"A map from string to int" ini-name:"int-map"`
+	} `group:"Other Options"`
+}
+
+func TestHelp(t *testing.T) {
+	var opts helpOptions
+
+	p := NewNamedParser("TestHelp", HelpFlag)
+	p.AddGroup("Application Options", "The application options", &opts)
+
+	_, err := p.ParseArgs([]string{"--help"})
+
+	if err == nil {
+		t.Fatalf("Expected help error")
+	}
+
+	if e, ok := err.(*Error); !ok {
+		t.Fatalf("Expected flags.Error, but got %#T", err)
+	} else {
+		if e.Type != ErrHelp {
+			t.Errorf("Expected flags.ErrHelp type, but got %s", e.Type)
+		}
+
+		expected := `Usage:
+  TestHelp [OPTIONS]
+
+Application Options:
+  -v, --verbose   Show verbose debug information
+  -c=             Call phone number
+      --ptrslice= A slice of pointers to string
+
+Other Options:
+  -s=             A slice of strings
+      --intmap=   A map from string to int
+
+Help Options:
+  -h, --help      Show this help message
+`
+
+		if e.Message != expected {
+			ret, err := helpDiff(e.Message, expected)
+
+			if err != nil {
+				t.Errorf("Unexpected diff error: %s", err)
+				t.Errorf("Unexpected help message, expected:\n\n%s\n\nbut got\n\n%s", expected, e.Message)
+			} else {
+				t.Errorf("Unexpected help message:\n\n%s", ret)
+			}
+		}
+	}
+}
+
+func TestMan(t *testing.T) {
+	var opts helpOptions
+
+	p := NewNamedParser("TestMan", HelpFlag)
+	p.ShortDescription = "Test manpage generation"
+	p.LongDescription = "This is a somewhat longer description of what this does"
+	p.AddGroup("Application Options", "The application options", &opts)
+
+	var buf bytes.Buffer
+	p.WriteManPage(&buf)
+
+	got := buf.String()
+
+	tt := time.Now()
+
+	expected := fmt.Sprintf(`.TH TestMan 1 "%s"
+.SH NAME
+TestMan \- Test manpage generation
+.SH SYNOPSIS
+\fBTestMan\fP [OPTIONS]
+.SH DESCRIPTION
+This is a somewhat longer description of what this does
+.SH OPTIONS
+.TP
+\fB-v, --verbose\fP
+Show verbose debug information
+.TP
+\fB-c\fP
+Call phone number
+.TP
+\fB--ptrslice\fP
+A slice of pointers to string
+.TP
+\fB-s\fP
+A slice of strings
+.TP
+\fB--intmap\fP
+A map from string to int
+`, tt.Format("2 January 2006"))
+
+	if got != expected {
+		ret, err := helpDiff(got, expected)
+
+		if err != nil {
+			t.Errorf("Unexpected man page, expected:\n\n%s\n\nbut got\n\n%s", expected, got)
+		} else {
+			t.Errorf("Unexpected man page:\n\n%s", ret)
+		}
+	}
+}