syncthing/lib/structutil/structutil_test.go

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// Copyright (C) 2016 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
package structutil
import (
"testing"
)
type Defaulter struct {
Value string
}
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func (d *Defaulter) ParseDefault(v string) error {
*d = Defaulter{Value: v}
return nil
}
func TestSetDefaults(t *testing.T) {
x := &struct {
A string `default:"string"`
B int `default:"2"`
C float64 `default:"2.2"`
D bool `default:"true"`
E Defaulter `default:"defaulter"`
}{}
if x.A != "" {
t.Error("string failed")
} else if x.B != 0 {
t.Error("int failed")
} else if x.C != 0 {
t.Errorf("float failed")
} else if x.D {
t.Errorf("bool failed")
} else if x.E.Value != "" {
t.Errorf("defaulter failed")
}
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SetDefaults(x)
if x.A != "string" {
t.Error("string failed")
} else if x.B != 2 {
t.Error("int failed")
} else if x.C != 2.2 {
t.Errorf("float failed")
} else if !x.D {
t.Errorf("bool failed")
} else if x.E.Value != "defaulter" {
t.Errorf("defaulter failed")
}
}
func TestFillNillSlices(t *testing.T) {
// Nil
x := &struct {
A []string `default:"a,b"`
}{}
if x.A != nil {
t.Error("not nil")
}
if err := FillNilSlices(x); err != nil {
t.Error(err)
}
if len(x.A) != 2 {
t.Error("length")
}
// Already provided
y := &struct {
A []string `default:"c,d,e"`
}{[]string{"a", "b"}}
if len(y.A) != 2 {
t.Error("length")
}
if err := FillNilSlices(y); err != nil {
t.Error(err)
}
if len(y.A) != 2 {
t.Error("length")
}
// Non-nil but empty
z := &struct {
A []string `default:"c,d,e"`
}{[]string{}}
if len(z.A) != 0 {
t.Error("length")
}
if err := FillNilSlices(z); err != nil {
t.Error(err)
}
if len(z.A) != 0 {
t.Error("length")
}
}
func TestFillNil(t *testing.T) {
type A struct {
Slice []int
Map map[string]string
Chan chan int
}
type B struct {
Slice *[]int
Map *map[string]string
Chan *chan int
}
type C struct {
A A
B *B
D *****[]int
}
c := C{}
FillNil(&c)
if c.A.Slice == nil {
t.Error("c.A.Slice")
}
if c.A.Map == nil {
t.Error("c.A.Slice")
}
if c.A.Chan == nil {
t.Error("c.A.Chan")
}
if c.B == nil {
t.Error("c.B")
}
if c.B.Slice == nil {
t.Error("c.B.Slice")
}
if c.B.Map == nil {
t.Error("c.B.Slice")
}
if c.B.Chan == nil {
t.Error("c.B.Chan")
}
if *c.B.Slice == nil {
t.Error("*c.B.Slice")
}
if *c.B.Map == nil {
t.Error("*c.B.Slice")
}
if *c.B.Chan == nil {
t.Error("*c.B.Chan")
}
if *****c.D == nil {
t.Error("c.D")
}
}
func TestFillNilDoesNotBulldozeSetFields(t *testing.T) {
type A struct {
Slice []int
Map map[string]string
Chan chan int
}
type B struct {
Slice *[]int
Map *map[string]string
Chan *chan int
}
type C struct {
A A
B *B
D **[]int
}
ch := make(chan int, 10)
d := make([]int, 10)
dd := &d
c := C{
A: A{
Slice: []int{1},
Map: map[string]string{
"k": "v",
},
Chan: make(chan int, 10),
},
B: &B{
Slice: &[]int{1},
Map: &map[string]string{
"k": "v",
},
Chan: &ch,
},
D: &dd,
}
FillNil(&c)
if len(c.A.Slice) != 1 {
t.Error("c.A.Slice")
}
if len(c.A.Map) != 1 {
t.Error("c.A.Slice")
}
if cap(c.A.Chan) != 10 {
t.Error("c.A.Chan")
}
if c.B == nil {
t.Error("c.B")
}
if len(*c.B.Slice) != 1 {
t.Error("c.B.Slice")
}
if len(*c.B.Map) != 1 {
t.Error("c.B.Slice")
}
if cap(*c.B.Chan) != 10 {
t.Error("c.B.Chan")
}
if cap(**c.D) != 10 {
t.Error("c.D")
}
}