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parse_test.go
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parse_test.go
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package arg
import (
"bytes"
"encoding/json"
"fmt"
"net"
"net/mail"
"net/url"
"os"
"strings"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func setenv(t *testing.T, name, val string) {
if err := os.Setenv(name, val); err != nil {
t.Error(err)
}
}
func parse(cmdline string, dest interface{}) error {
_, err := pparse(cmdline, dest)
return err
}
func pparse(cmdline string, dest interface{}) (*Parser, error) {
return parseWithEnv(cmdline, nil, dest)
}
func parseWithEnv(cmdline string, env []string, dest interface{}) (*Parser, error) {
p, err := NewParser(Config{}, dest)
if err != nil {
return nil, err
}
// split the command line
var parts []string
if len(cmdline) > 0 {
parts = strings.Split(cmdline, " ")
}
// split the environment vars
for _, s := range env {
pos := strings.Index(s, "=")
if pos == -1 {
return nil, fmt.Errorf("missing equals sign in %q", s)
}
err := os.Setenv(s[:pos], s[pos+1:])
if err != nil {
return nil, err
}
}
// execute the parser
return p, p.Parse(parts)
}
func TestString(t *testing.T) {
var args struct {
Foo string
Ptr *string
}
err := parse("--foo bar --ptr baz", &args)
require.NoError(t, err)
assert.Equal(t, "bar", args.Foo)
assert.Equal(t, "baz", *args.Ptr)
}
func TestBool(t *testing.T) {
var args struct {
A bool
B bool
C *bool
D *bool
}
err := parse("--a --c", &args)
require.NoError(t, err)
assert.True(t, args.A)
assert.False(t, args.B)
assert.True(t, *args.C)
assert.Nil(t, args.D)
}
func TestInt(t *testing.T) {
var args struct {
Foo int
Ptr *int
}
err := parse("--foo 7 --ptr 8", &args)
require.NoError(t, err)
assert.EqualValues(t, 7, args.Foo)
assert.EqualValues(t, 8, *args.Ptr)
}
func TestHexOctBin(t *testing.T) {
var args struct {
Hex int
Oct int
Bin int
Underscored int
}
err := parse("--hex 0xA --oct 0o10 --bin 0b101 --underscored 123_456", &args)
require.NoError(t, err)
assert.EqualValues(t, 10, args.Hex)
assert.EqualValues(t, 8, args.Oct)
assert.EqualValues(t, 5, args.Bin)
assert.EqualValues(t, 123456, args.Underscored)
}
func TestNegativeInt(t *testing.T) {
var args struct {
Foo int
}
err := parse("-foo -100", &args)
require.NoError(t, err)
assert.EqualValues(t, args.Foo, -100)
}
func TestNegativeIntAndFloatAndTricks(t *testing.T) {
var args struct {
Foo int
Bar float64
N int `arg:"--100"`
}
err := parse("-foo -100 -bar -60.14 -100 -100", &args)
require.NoError(t, err)
assert.EqualValues(t, args.Foo, -100)
assert.EqualValues(t, args.Bar, -60.14)
assert.EqualValues(t, args.N, -100)
}
func TestUint(t *testing.T) {
var args struct {
Foo uint
Ptr *uint
}
err := parse("--foo 7 --ptr 8", &args)
require.NoError(t, err)
assert.EqualValues(t, 7, args.Foo)
assert.EqualValues(t, 8, *args.Ptr)
}
func TestFloat(t *testing.T) {
var args struct {
Foo float32
Ptr *float32
}
err := parse("--foo 3.4 --ptr 3.5", &args)
require.NoError(t, err)
assert.EqualValues(t, 3.4, args.Foo)
assert.EqualValues(t, 3.5, *args.Ptr)
}
func TestDuration(t *testing.T) {
var args struct {
Foo time.Duration
Ptr *time.Duration
}
err := parse("--foo 3ms --ptr 4ms", &args)
require.NoError(t, err)
assert.Equal(t, 3*time.Millisecond, args.Foo)
assert.Equal(t, 4*time.Millisecond, *args.Ptr)
}
func TestInvalidDuration(t *testing.T) {
var args struct {
Foo time.Duration
}
err := parse("--foo xxx", &args)
require.Error(t, err)
}
func TestIntPtr(t *testing.T) {
var args struct {
Foo *int
}
err := parse("--foo 123", &args)
require.NoError(t, err)
require.NotNil(t, args.Foo)
assert.Equal(t, 123, *args.Foo)
}
func TestIntPtrNotPresent(t *testing.T) {
var args struct {
Foo *int
}
err := parse("", &args)
require.NoError(t, err)
assert.Nil(t, args.Foo)
}
func TestMixed(t *testing.T) {
var args struct {
Foo string `arg:"-f"`
Bar int
Baz uint `arg:"positional"`
Ham bool
Spam float32
}
args.Bar = 3
err := parse("123 -spam=1.2 -ham -f xyz", &args)
require.NoError(t, err)
assert.Equal(t, "xyz", args.Foo)
assert.Equal(t, 3, args.Bar)
assert.Equal(t, uint(123), args.Baz)
assert.Equal(t, true, args.Ham)
assert.EqualValues(t, 1.2, args.Spam)
}
func TestRequired(t *testing.T) {
var args struct {
Foo string `arg:"required"`
}
err := parse("", &args)
require.Error(t, err, "--foo is required")
}
func TestRequiredWithEnv(t *testing.T) {
var args struct {
Foo string `arg:"required,env:FOO"`
}
err := parse("", &args)
require.Error(t, err, "--foo is required (or environment variable FOO)")
}
func TestRequiredWithEnvOnly(t *testing.T) {
var args struct {
Foo string `arg:"required,--,-,env:FOO"`
}
_, err := parseWithEnv("", []string{}, &args)
require.Error(t, err, "environment variable FOO is required")
}
func TestShortFlag(t *testing.T) {
var args struct {
Foo string `arg:"-f"`
}
err := parse("-f xyz", &args)
require.NoError(t, err)
assert.Equal(t, "xyz", args.Foo)
err = parse("-foo xyz", &args)
require.NoError(t, err)
assert.Equal(t, "xyz", args.Foo)
err = parse("--foo xyz", &args)
require.NoError(t, err)
assert.Equal(t, "xyz", args.Foo)
}
func TestInvalidShortFlag(t *testing.T) {
var args struct {
Foo string `arg:"-foo"`
}
err := parse("", &args)
assert.Error(t, err)
}
func TestLongFlag(t *testing.T) {
var args struct {
Foo string `arg:"--abc"`
}
err := parse("-abc xyz", &args)
require.NoError(t, err)
assert.Equal(t, "xyz", args.Foo)
err = parse("--abc xyz", &args)
require.NoError(t, err)
assert.Equal(t, "xyz", args.Foo)
}
func TestSlice(t *testing.T) {
var args struct {
Strings []string
}
err := parse("--strings a b c", &args)
require.NoError(t, err)
assert.Equal(t, []string{"a", "b", "c"}, args.Strings)
}
func TestSliceOfBools(t *testing.T) {
var args struct {
B []bool
}
err := parse("--b true false true", &args)
require.NoError(t, err)
assert.Equal(t, []bool{true, false, true}, args.B)
}
func TestMap(t *testing.T) {
var args struct {
Values map[string]int
}
err := parse("--values a=1 b=2 c=3", &args)
require.NoError(t, err)
assert.Len(t, args.Values, 3)
assert.Equal(t, 1, args.Values["a"])
assert.Equal(t, 2, args.Values["b"])
assert.Equal(t, 3, args.Values["c"])
}
func TestMapPositional(t *testing.T) {
var args struct {
Values map[string]int `arg:"positional"`
}
err := parse("a=1 b=2 c=3", &args)
require.NoError(t, err)
assert.Len(t, args.Values, 3)
assert.Equal(t, 1, args.Values["a"])
assert.Equal(t, 2, args.Values["b"])
assert.Equal(t, 3, args.Values["c"])
}
func TestMapWithSeparate(t *testing.T) {
var args struct {
Values map[string]int `arg:"separate"`
}
err := parse("--values a=1 --values b=2 --values c=3", &args)
require.NoError(t, err)
assert.Len(t, args.Values, 3)
assert.Equal(t, 1, args.Values["a"])
assert.Equal(t, 2, args.Values["b"])
assert.Equal(t, 3, args.Values["c"])
}
func TestPlaceholder(t *testing.T) {
var args struct {
Input string `arg:"positional" placeholder:"SRC"`
Output []string `arg:"positional" placeholder:"DST"`
Optimize int `arg:"-O" placeholder:"LEVEL"`
MaxJobs int `arg:"-j" placeholder:"N"`
}
err := parse("-O 5 --maxjobs 2 src dest1 dest2", &args)
assert.NoError(t, err)
}
func TestNoLongName(t *testing.T) {
var args struct {
ShortOnly string `arg:"-s,--"`
EnvOnly string `arg:"--,env"`
}
setenv(t, "ENVONLY", "TestVal")
err := parse("-s TestVal2", &args)
assert.NoError(t, err)
assert.Equal(t, "TestVal", args.EnvOnly)
assert.Equal(t, "TestVal2", args.ShortOnly)
}
func TestCaseSensitive(t *testing.T) {
var args struct {
Lower bool `arg:"-v"`
Upper bool `arg:"-V"`
}
err := parse("-v", &args)
require.NoError(t, err)
assert.True(t, args.Lower)
assert.False(t, args.Upper)
}
func TestCaseSensitive2(t *testing.T) {
var args struct {
Lower bool `arg:"-v"`
Upper bool `arg:"-V"`
}
err := parse("-V", &args)
require.NoError(t, err)
assert.False(t, args.Lower)
assert.True(t, args.Upper)
}
func TestPositional(t *testing.T) {
var args struct {
Input string `arg:"positional"`
Output string `arg:"positional"`
}
err := parse("foo", &args)
require.NoError(t, err)
assert.Equal(t, "foo", args.Input)
assert.Equal(t, "", args.Output)
}
func TestPositionalPointer(t *testing.T) {
var args struct {
Input string `arg:"positional"`
Output []*string `arg:"positional"`
}
err := parse("foo bar baz", &args)
require.NoError(t, err)
assert.Equal(t, "foo", args.Input)
bar := "bar"
baz := "baz"
assert.Equal(t, []*string{&bar, &baz}, args.Output)
}
func TestRequiredPositional(t *testing.T) {
var args struct {
Input string `arg:"positional"`
Output string `arg:"positional,required"`
}
err := parse("foo", &args)
assert.Error(t, err)
}
func TestRequiredPositionalMultiple(t *testing.T) {
var args struct {
Input string `arg:"positional"`
Multiple []string `arg:"positional,required"`
}
err := parse("foo", &args)
assert.Error(t, err)
}
func TestTooManyPositional(t *testing.T) {
var args struct {
Input string `arg:"positional"`
Output string `arg:"positional"`
}
err := parse("foo bar baz", &args)
assert.Error(t, err)
}
func TestMultiple(t *testing.T) {
var args struct {
Foo []int
Bar []string
}
err := parse("--foo 1 2 3 --bar x y z", &args)
require.NoError(t, err)
assert.Equal(t, []int{1, 2, 3}, args.Foo)
assert.Equal(t, []string{"x", "y", "z"}, args.Bar)
}
func TestMultiplePositionals(t *testing.T) {
var args struct {
Input string `arg:"positional"`
Multiple []string `arg:"positional,required"`
}
err := parse("foo a b c", &args)
assert.NoError(t, err)
assert.Equal(t, "foo", args.Input)
assert.Equal(t, []string{"a", "b", "c"}, args.Multiple)
}
func TestMultipleWithEq(t *testing.T) {
var args struct {
Foo []int
Bar []string
}
err := parse("--foo 1 2 3 --bar=x", &args)
require.NoError(t, err)
assert.Equal(t, []int{1, 2, 3}, args.Foo)
assert.Equal(t, []string{"x"}, args.Bar)
}
func TestMultipleWithDefault(t *testing.T) {
var args struct {
Foo []int
Bar []string
}
args.Foo = []int{42}
args.Bar = []string{"foo"}
err := parse("--foo 1 2 3 --bar x y z", &args)
require.NoError(t, err)
assert.Equal(t, []int{1, 2, 3}, args.Foo)
assert.Equal(t, []string{"x", "y", "z"}, args.Bar)
}
func TestExemptField(t *testing.T) {
var args struct {
Foo string
Bar interface{} `arg:"-"`
}
err := parse("--foo xyz", &args)
require.NoError(t, err)
assert.Equal(t, "xyz", args.Foo)
}
func TestUnknownField(t *testing.T) {
var args struct {
Foo string
}
err := parse("--bar xyz", &args)
assert.Error(t, err)
}
func TestMissingRequired(t *testing.T) {
var args struct {
Foo string `arg:"required"`
X []string `arg:"positional"`
}
err := parse("x", &args)
assert.Error(t, err)
}
func TestNonsenseKey(t *testing.T) {
var args struct {
X []string `arg:"positional, nonsense"`
}
err := parse("x", &args)
assert.Error(t, err)
}
func TestMissingValueAtEnd(t *testing.T) {
var args struct {
Foo string
}
err := parse("--foo", &args)
assert.Error(t, err)
}
func TestMissingValueInMiddle(t *testing.T) {
var args struct {
Foo string
Bar string
}
err := parse("--foo --bar=abc", &args)
assert.Error(t, err)
}
func TestNegativeValue(t *testing.T) {
var args struct {
Foo int
}
err := parse("--foo -123", &args)
require.NoError(t, err)
assert.Equal(t, -123, args.Foo)
}
func TestInvalidInt(t *testing.T) {
var args struct {
Foo int
}
err := parse("--foo=xyz", &args)
assert.Error(t, err)
}
func TestInvalidUint(t *testing.T) {
var args struct {
Foo uint
}
err := parse("--foo=xyz", &args)
assert.Error(t, err)
}
func TestInvalidFloat(t *testing.T) {
var args struct {
Foo float64
}
err := parse("--foo xyz", &args)
require.Error(t, err)
}
func TestInvalidBool(t *testing.T) {
var args struct {
Foo bool
}
err := parse("--foo=xyz", &args)
require.Error(t, err)
}
func TestInvalidIntSlice(t *testing.T) {
var args struct {
Foo []int
}
err := parse("--foo 1 2 xyz", &args)
require.Error(t, err)
}
func TestInvalidPositional(t *testing.T) {
var args struct {
Foo int `arg:"positional"`
}
err := parse("xyz", &args)
require.Error(t, err)
}
func TestInvalidPositionalSlice(t *testing.T) {
var args struct {
Foo []int `arg:"positional"`
}
err := parse("1 2 xyz", &args)
require.Error(t, err)
}
func TestNoMoreOptions(t *testing.T) {
var args struct {
Foo string
Bar []string `arg:"positional"`
}
err := parse("abc -- --foo xyz", &args)
require.NoError(t, err)
assert.Equal(t, "", args.Foo)
assert.Equal(t, []string{"abc", "--foo", "xyz"}, args.Bar)
}
func TestNoMoreOptionsBeforeHelp(t *testing.T) {
var args struct {
Foo int
}
err := parse("not_an_integer -- --help", &args)
assert.NotEqual(t, ErrHelp, err)
}
func TestHelpFlag(t *testing.T) {
var args struct {
Foo string
Bar interface{} `arg:"-"`
}
err := parse("--help", &args)
assert.Equal(t, ErrHelp, err)
}
func TestPanicOnNonPointer(t *testing.T) {
var args struct{}
assert.Panics(t, func() {
_ = parse("", args)
})
}
func TestErrorOnNonStruct(t *testing.T) {
var args string
err := parse("", &args)
assert.Error(t, err)
}
func TestUnsupportedType(t *testing.T) {
var args struct {
Foo interface{}
}
err := parse("--foo", &args)
assert.Error(t, err)
}
func TestUnsupportedSliceElement(t *testing.T) {
var args struct {
Foo []interface{}
}
err := parse("--foo 3", &args)
assert.Error(t, err)
}
func TestUnsupportedSliceElementMissingValue(t *testing.T) {
var args struct {
Foo []interface{}
}
err := parse("--foo", &args)
assert.Error(t, err)
}
func TestUnknownTag(t *testing.T) {
var args struct {
Foo string `arg:"this_is_not_valid"`
}
err := parse("--foo xyz", &args)
assert.Error(t, err)
}
func TestParse(t *testing.T) {
var args struct {
Foo string
}
os.Args = []string{"example", "--foo", "bar"}
err := Parse(&args)
require.NoError(t, err)
assert.Equal(t, "bar", args.Foo)
}
func TestParseError(t *testing.T) {
var args struct {
Foo string `arg:"this_is_not_valid"`
}
os.Args = []string{"example", "--bar"}
err := Parse(&args)
assert.Error(t, err)
}
func TestMustParse(t *testing.T) {
var args struct {
Foo string
}
os.Args = []string{"example", "--foo", "bar"}
parser := MustParse(&args)
assert.Equal(t, "bar", args.Foo)
assert.NotNil(t, parser)
}
func TestEnvironmentVariable(t *testing.T) {
var args struct {
Foo string `arg:"env"`
}
_, err := parseWithEnv("", []string{"FOO=bar"}, &args)
require.NoError(t, err)
assert.Equal(t, "bar", args.Foo)
}
func TestEnvironmentVariableNotPresent(t *testing.T) {
var args struct {
NotPresent string `arg:"env"`
}
_, err := parseWithEnv("", nil, &args)
require.NoError(t, err)
assert.Equal(t, "", args.NotPresent)
}
func TestEnvironmentVariableOverrideName(t *testing.T) {
var args struct {
Foo string `arg:"env:BAZ"`
}
_, err := parseWithEnv("", []string{"BAZ=bar"}, &args)
require.NoError(t, err)
assert.Equal(t, "bar", args.Foo)
}
func TestEnvironmentVariableOverrideArgument(t *testing.T) {
var args struct {
Foo string `arg:"env"`
}
_, err := parseWithEnv("--foo zzz", []string{"FOO=bar"}, &args)
require.NoError(t, err)
assert.Equal(t, "zzz", args.Foo)
}
func TestEnvironmentVariableError(t *testing.T) {
var args struct {
Foo int `arg:"env"`
}
_, err := parseWithEnv("", []string{"FOO=bar"}, &args)
assert.Error(t, err)
}
func TestEnvironmentVariableRequired(t *testing.T) {
var args struct {
Foo string `arg:"env,required"`
}
_, err := parseWithEnv("", []string{"FOO=bar"}, &args)
require.NoError(t, err)
assert.Equal(t, "bar", args.Foo)
}
func TestEnvironmentVariableSliceArgumentString(t *testing.T) {
var args struct {
Foo []string `arg:"env"`
}
_, err := parseWithEnv("", []string{`FOO=bar,"baz, qux"`}, &args)
require.NoError(t, err)
assert.Equal(t, []string{"bar", "baz, qux"}, args.Foo)
}
func TestEnvironmentVariableSliceEmpty(t *testing.T) {
var args struct {
Foo []string `arg:"env"`
}
_, err := parseWithEnv("", []string{`FOO=`}, &args)
require.NoError(t, err)
assert.Len(t, args.Foo, 0)
}
func TestEnvironmentVariableSliceArgumentInteger(t *testing.T) {
var args struct {
Foo []int `arg:"env"`
}
_, err := parseWithEnv("", []string{`FOO=1,99`}, &args)
require.NoError(t, err)
assert.Equal(t, []int{1, 99}, args.Foo)
}
func TestEnvironmentVariableSliceArgumentFloat(t *testing.T) {
var args struct {
Foo []float32 `arg:"env"`
}
_, err := parseWithEnv("", []string{`FOO=1.1,99.9`}, &args)
require.NoError(t, err)
assert.Equal(t, []float32{1.1, 99.9}, args.Foo)
}
func TestEnvironmentVariableSliceArgumentBool(t *testing.T) {
var args struct {
Foo []bool `arg:"env"`
}
_, err := parseWithEnv("", []string{`FOO=true,false,0,1`}, &args)
require.NoError(t, err)
assert.Equal(t, []bool{true, false, false, true}, args.Foo)
}
func TestEnvironmentVariableSliceArgumentWrongCsv(t *testing.T) {
var args struct {
Foo []int `arg:"env"`
}
_, err := parseWithEnv("", []string{`FOO=1,99\"`}, &args)
assert.Error(t, err)
}
func TestEnvironmentVariableSliceArgumentWrongType(t *testing.T) {
var args struct {
Foo []bool `arg:"env"`
}
_, err := parseWithEnv("", []string{`FOO=one,two`}, &args)
assert.Error(t, err)
}
func TestEnvironmentVariableMap(t *testing.T) {
var args struct {
Foo map[int]string `arg:"env"`
}
_, err := parseWithEnv("", []string{`FOO=1=one,99=ninetynine`}, &args)
require.NoError(t, err)
assert.Len(t, args.Foo, 2)
assert.Equal(t, "one", args.Foo[1])
assert.Equal(t, "ninetynine", args.Foo[99])
}
func TestEnvironmentVariableEmptyMap(t *testing.T) {
var args struct {
Foo map[int]string `arg:"env"`
}
_, err := parseWithEnv("", []string{`FOO=`}, &args)
require.NoError(t, err)
assert.Len(t, args.Foo, 0)
}
func TestEnvironmentVariableIgnored(t *testing.T) {
var args struct {
Foo string `arg:"env"`
}
setenv(t, "FOO", "abc")
p, err := NewParser(Config{IgnoreEnv: true}, &args)
require.NoError(t, err)
err = p.Parse(nil)
assert.NoError(t, err)
assert.Equal(t, "", args.Foo)
}
func TestDefaultValuesIgnored(t *testing.T) {
var args struct {
Foo string `default:"bad"`
}
p, err := NewParser(Config{IgnoreDefault: true}, &args)
require.NoError(t, err)
err = p.Parse(nil)
assert.NoError(t, err)
assert.Equal(t, "", args.Foo)
}
func TestRequiredEnvironmentOnlyVariableIsMissing(t *testing.T) {
var args struct {
Foo string `arg:"required,--,env:FOO"`
}
_, err := parseWithEnv("", []string{""}, &args)
assert.Error(t, err)
}
func TestOptionalEnvironmentOnlyVariable(t *testing.T) {
var args struct {
Foo string `arg:"env:FOO"`
}
_, err := parseWithEnv("", []string{}, &args)
assert.NoError(t, err)
}
func TestEnvironmentVariableInSubcommandIgnored(t *testing.T) {
var args struct {
Sub *struct {
Foo string `arg:"env"`
} `arg:"subcommand"`
}
setenv(t, "FOO", "abc")
p, err := NewParser(Config{IgnoreEnv: true}, &args)
require.NoError(t, err)
err = p.Parse([]string{"sub"})
require.NoError(t, err)
require.NotNil(t, args.Sub)
assert.Equal(t, "", args.Sub.Foo)
}
func TestParserMustParseEmptyArgs(t *testing.T) {
// this mirrors TestEmptyArgs
p, err := NewParser(Config{}, &struct{}{})
require.NoError(t, err)
assert.NotNil(t, p)
p.MustParse(nil)
}
func TestParserMustParse(t *testing.T) {
tests := []struct {
name string
args versioned
cmdLine []string
code int
output string
}{
{name: "help", args: struct{}{}, cmdLine: []string{"--help"}, code: 0, output: "display this help and exit"},
{name: "version", args: versioned{}, cmdLine: []string{"--version"}, code: 0, output: "example 3.2.1"},
{name: "invalid", args: struct{}{}, cmdLine: []string{"invalid"}, code: -1, output: ""},
}
for _, tt := range tests {
tt := tt
t.Run(tt.name, func(t *testing.T) {
var exitCode int
var stdout bytes.Buffer
exit := func(code int) { exitCode = code }
p, err := NewParser(Config{Exit: exit, Out: &stdout}, &tt.args)
require.NoError(t, err)
assert.NotNil(t, p)
p.MustParse(tt.cmdLine)
assert.NotNil(t, exitCode)
assert.Equal(t, tt.code, exitCode)
assert.Contains(t, stdout.String(), tt.output)
})
}
}
type textUnmarshaler struct {
val int
}
func (f *textUnmarshaler) UnmarshalText(b []byte) error {
f.val = len(b)
return nil
}
func TestTextUnmarshaler(t *testing.T) {
// fields that implement TextUnmarshaler should be parsed using that interface
var args struct {
Foo textUnmarshaler
}
err := parse("--foo abc", &args)
require.NoError(t, err)
assert.Equal(t, 3, args.Foo.val)
}
func TestPtrToTextUnmarshaler(t *testing.T) {
// fields that implement TextUnmarshaler should be parsed using that interface
var args struct {
Foo *textUnmarshaler
}
err := parse("--foo abc", &args)
require.NoError(t, err)
assert.Equal(t, 3, args.Foo.val)
}
func TestRepeatedTextUnmarshaler(t *testing.T) {
// fields that implement TextUnmarshaler should be parsed using that interface
var args struct {
Foo []textUnmarshaler
}
err := parse("--foo abc d ef", &args)
require.NoError(t, err)
require.Len(t, args.Foo, 3)
assert.Equal(t, 3, args.Foo[0].val)
assert.Equal(t, 1, args.Foo[1].val)
assert.Equal(t, 2, args.Foo[2].val)
}
func TestRepeatedPtrToTextUnmarshaler(t *testing.T) {
// fields that implement TextUnmarshaler should be parsed using that interface
var args struct {
Foo []*textUnmarshaler
}
err := parse("--foo abc d ef", &args)
require.NoError(t, err)
require.Len(t, args.Foo, 3)
assert.Equal(t, 3, args.Foo[0].val)
assert.Equal(t, 1, args.Foo[1].val)
assert.Equal(t, 2, args.Foo[2].val)
}
func TestPositionalTextUnmarshaler(t *testing.T) {
// fields that implement TextUnmarshaler should be parsed using that interface
var args struct {
Foo []textUnmarshaler `arg:"positional"`
}
err := parse("abc d ef", &args)
require.NoError(t, err)
require.Len(t, args.Foo, 3)
assert.Equal(t, 3, args.Foo[0].val)
assert.Equal(t, 1, args.Foo[1].val)
assert.Equal(t, 2, args.Foo[2].val)
}
func TestPositionalPtrToTextUnmarshaler(t *testing.T) {
// fields that implement TextUnmarshaler should be parsed using that interface