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// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package opt
import (
"encoding/json"
"flag"
"reflect"
"strings"
"testing"
)
func TestBool(t *testing.T) {
tests := []struct {
name string
in any
want string // JSON
wantBack any
}{
{
name: "null_for_unset",
in: struct {
True Bool
False Bool
Unset Bool
}{
True: "true",
False: "false",
},
want: `{"True":true,"False":false,"Unset":null}`,
wantBack: struct {
True Bool
False Bool
Unset Bool
}{
True: "true",
False: "false",
Unset: "unset",
},
},
{
name: "omitempty_unset",
in: struct {
True Bool
False Bool
Unset Bool `json:",omitempty"`
}{
True: "true",
False: "false",
},
want: `{"True":true,"False":false}`,
},
{
name: "unset_marshals_as_null",
in: struct {
True Bool
False Bool
Foo Bool
}{
True: "true",
False: "false",
Foo: "unset",
},
want: `{"True":true,"False":false,"Foo":null}`,
wantBack: struct {
True Bool
False Bool
Foo Bool
}{"true", "false", "unset"},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
j, err := json.Marshal(tt.in)
if err != nil {
t.Fatal(err)
}
if string(j) != tt.want {
t.Errorf("wrong JSON:\n got: %s\nwant: %s\n", j, tt.want)
}
wantBack := tt.in
if tt.wantBack != nil {
wantBack = tt.wantBack
}
// And back again:
newVal := reflect.New(reflect.TypeOf(tt.in))
out := newVal.Interface()
if err := json.Unmarshal(j, out); err != nil {
t.Fatalf("Unmarshal %#q: %v", j, err)
}
got := newVal.Elem().Interface()
if !reflect.DeepEqual(got, wantBack) {
t.Errorf("value mismatch\n got: %+v\nwant: %+v\n", got, wantBack)
}
})
}
}
func TestBoolEqualBool(t *testing.T) {
tests := []struct {
b Bool
v bool
want bool
}{
{"", true, false},
{"", false, false},
{"sdflk;", true, false},
{"sldkf;", false, false},
{"true", true, true},
{"true", false, false},
{"false", true, false},
{"false", false, true},
{"1", true, false}, // "1" is not true; only "true" is
{"True", true, false}, // "True" is not true; only "true" is
}
for _, tt := range tests {
if got := tt.b.EqualBool(tt.v); got != tt.want {
t.Errorf("(%q).EqualBool(%v) = %v; want %v", string(tt.b), tt.v, got, tt.want)
}
}
}
func TestUnmarshalAlloc(t *testing.T) {
b := json.Unmarshaler(new(Bool))
n := testing.AllocsPerRun(10, func() { b.UnmarshalJSON(trueBytes) })
if n > 0 {
t.Errorf("got %v allocs, want 0", n)
}
}
func TestBoolFlag(t *testing.T) {
tests := []struct {
arguments string
wantParseError bool // expect flag.Parse to error
want Bool
}{
{"", false, Bool("")},
{"-test", true, Bool("")},
{`-test=""`, true, Bool("")},
{"-test invalid", true, Bool("")},
{"-test true", false, NewBool(true)},
{"-test 1", false, NewBool(true)},
{"-test false", false, NewBool(false)},
{"-test 0", false, NewBool(false)},
}
for _, tt := range tests {
var got Bool
fs := flag.NewFlagSet(t.Name(), flag.ContinueOnError)
fs.Var(&BoolFlag{&got}, "test", "test flag")
arguments := strings.Split(tt.arguments, " ")
err := fs.Parse(arguments)
if (err != nil) != tt.wantParseError {
t.Errorf("flag.Parse(%q) returned error %v, want %v", arguments, err, tt.wantParseError)
}
if got != tt.want {
t.Errorf("flag.Parse(%q) got %q, want %q", arguments, got, tt.want)
}
}
}
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