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package flags
import (
"fmt"
"testing"
)
type marshalled string
func (m *marshalled) UnmarshalFlag(value string) error {
if value == "yes" {
*m = "true"
} else if value == "no" {
*m = "false"
} else {
return fmt.Errorf("`%s' is not a valid value, please specify `yes' or `no'", value)
}
return nil
}
func (m marshalled) MarshalFlag() (string, error) {
if m == "true" {
return "yes", nil
}
return "no", nil
}
type marshalledError bool
func (m marshalledError) MarshalFlag() (string, error) {
return "", newErrorf(ErrMarshal, "Failed to marshal")
}
func TestUnmarshal(t *testing.T) {
var opts = struct {
Value marshalled `short:"v"`
}{}
ret := assertParseSuccess(t, &opts, "-v=yes")
assertStringArray(t, ret, []string{})
if opts.Value != "true" {
t.Errorf("Expected Value to be \"true\"")
}
}
func TestUnmarshalDefault(t *testing.T) {
var opts = struct {
Value marshalled `short:"v" default:"yes"`
}{}
ret := assertParseSuccess(t, &opts)
assertStringArray(t, ret, []string{})
if opts.Value != "true" {
t.Errorf("Expected Value to be \"true\"")
}
}
func TestUnmarshalOptional(t *testing.T) {
var opts = struct {
Value marshalled `short:"v" optional:"yes" optional-value:"yes"`
}{}
ret := assertParseSuccess(t, &opts, "-v")
assertStringArray(t, ret, []string{})
if opts.Value != "true" {
t.Errorf("Expected Value to be \"true\"")
}
}
func TestUnmarshalError(t *testing.T) {
var opts = struct {
Value marshalled `short:"v"`
}{}
assertParseFail(t, ErrMarshal, fmt.Sprintf("invalid argument for flag `%cv' (expected flags.marshalled): `invalid' is not a valid value, please specify `yes' or `no'", defaultShortOptDelimiter), &opts, "-vinvalid")
}
func TestUnmarshalPositionalError(t *testing.T) {
var opts = struct {
Args struct {
Value marshalled
} `positional-args:"yes"`
}{}
parser := NewParser(&opts, Default&^PrintErrors)
_, err := parser.ParseArgs([]string{"invalid"})
msg := "`invalid' is not a valid value, please specify `yes' or `no'"
if err == nil {
assertFatalf(t, "Expected error: %s", msg)
return
}
if err.Error() != msg {
assertErrorf(t, "Expected error message %#v, but got %#v", msg, err.Error())
}
}
func TestMarshalError(t *testing.T) {
var opts = struct {
Value marshalledError `short:"v"`
}{}
p := NewParser(&opts, Default)
o := p.Command.Groups()[0].Options()[0]
_, err := convertToString(o.value, o.tag)
assertError(t, err, ErrMarshal, "Failed to marshal")
}
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