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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package flag_test
import (
. "flag"
"fmt"
"os"
"testing"
)
var (
test_bool = Bool("test_bool", false, "bool value")
test_int = Int("test_int", 0, "int value")
test_int64 = Int64("test_int64", 0, "int64 value")
test_uint = Uint("test_uint", 0, "uint value")
test_uint64 = Uint64("test_uint64", 0, "uint64 value")
test_string = String("test_string", "0", "string value")
test_float64 = Float64("test_float64", 0, "float64 value")
)
func boolString(s string) string {
if s == "0" {
return "false"
}
return "true"
}
func TestEverything(t *testing.T) {
m := make(map[string]*Flag)
desired := "0"
visitor := func(f *Flag) {
if len(f.Name) > 5 && f.Name[0:5] == "test_" {
m[f.Name] = f
ok := false
switch {
case f.Value.String() == desired:
ok = true
case f.Name == "test_bool" && f.Value.String() == boolString(desired):
ok = true
}
if !ok {
t.Error("Visit: bad value", f.Value.String(), "for", f.Name)
}
}
}
VisitAll(visitor)
if len(m) != 7 {
t.Error("VisitAll misses some flags")
for k, v := range m {
t.Log(k, *v)
}
}
m = make(map[string]*Flag)
Visit(visitor)
if len(m) != 0 {
t.Errorf("Visit sees unset flags")
for k, v := range m {
t.Log(k, *v)
}
}
// Now set all flags
Set("test_bool", "true")
Set("test_int", "1")
Set("test_int64", "1")
Set("test_uint", "1")
Set("test_uint64", "1")
Set("test_string", "1")
Set("test_float64", "1")
desired = "1"
Visit(visitor)
if len(m) != 7 {
t.Error("Visit fails after set")
for k, v := range m {
t.Log(k, *v)
}
}
}
func TestUsage(t *testing.T) {
called := false
ResetForTesting(func() { called = true })
if ParseForTesting([]string{"a.out", "-x"}) {
t.Error("parse did not fail for unknown flag")
}
if !called {
t.Error("did not call Usage for unknown flag")
}
}
func TestParse(t *testing.T) {
ResetForTesting(func() { t.Error("bad parse") })
boolFlag := Bool("bool", false, "bool value")
bool2Flag := Bool("bool2", false, "bool2 value")
intFlag := Int("int", 0, "int value")
int64Flag := Int64("int64", 0, "int64 value")
uintFlag := Uint("uint", 0, "uint value")
uint64Flag := Uint64("uint64", 0, "uint64 value")
stringFlag := String("string", "0", "string value")
float64Flag := Float64("float64", 0, "float64 value")
extra := "one-extra-argument"
args := []string{
"a.out",
"-bool",
"-bool2=true",
"--int", "22",
"--int64", "23",
"-uint", "24",
"--uint64", "25",
"-string", "hello",
"-float64", "2718e28",
extra,
}
if !ParseForTesting(args) {
t.Fatal("parse failed")
}
if *boolFlag != true {
t.Error("bool flag should be true, is ", *boolFlag)
}
if *bool2Flag != true {
t.Error("bool2 flag should be true, is ", *bool2Flag)
}
if *intFlag != 22 {
t.Error("int flag should be 22, is ", *intFlag)
}
if *int64Flag != 23 {
t.Error("int64 flag should be 23, is ", *int64Flag)
}
if *uintFlag != 24 {
t.Error("uint flag should be 24, is ", *uintFlag)
}
if *uint64Flag != 25 {
t.Error("uint64 flag should be 25, is ", *uint64Flag)
}
if *stringFlag != "hello" {
t.Error("string flag should be `hello`, is ", *stringFlag)
}
if *float64Flag != 2718e28 {
t.Error("float64 flag should be 2718e28, is ", *float64Flag)
}
if len(Args()) != 1 {
t.Error("expected one argument, got", len(Args()))
} else if Args()[0] != extra {
t.Errorf("expected argument %q got %q", extra, Args()[0])
}
}
// Declare a user-defined flag.
type flagVar []string
func (f *flagVar) String() string {
return fmt.Sprint([]string(*f))
}
func (f *flagVar) Set(value string) bool {
*f = append(*f, value)
return true
}
func TestUserDefined(t *testing.T) {
ResetForTesting(func() { t.Fatal("bad parse") })
var v flagVar
Var(&v, "v", "usage")
if !ParseForTesting([]string{"a.out", "-v", "1", "-v", "2", "-v=3"}) {
t.Error("parse failed")
}
if len(v) != 3 {
t.Fatal("expected 3 args; got ", len(v))
}
expect := "[1 2 3]"
if v.String() != expect {
t.Errorf("expected value %q got %q", expect, v.String())
}
}
func TestChangingArgs(t *testing.T) {
ResetForTesting(func() { t.Fatal("bad parse") })
oldArgs := os.Args
defer func() { os.Args = oldArgs }()
os.Args = []string{"cmd", "-before", "subcmd", "-after", "args"}
before := Bool("before", false, "")
Parse()
cmd := Arg(0)
os.Args = Args()
after := Bool("after", false, "")
Parse()
args := Args()
if !*before || cmd != "subcmd" || !*after || len(args) != 1 || args[0] != "args" {
t.Fatalf("expected true subcmd true [args] got %v %v %v %v", *before, cmd, *after, args)
}
}
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