1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
|
// Copyright (c) Tailscale Inc & contributors
// SPDX-License-Identifier: BSD-3-Clause
package main
import (
"reflect"
"testing"
"tailscale.com/cmd/cloner/clonerex"
)
func TestSliceContainer(t *testing.T) {
num := 5
examples := []struct {
name string
in *clonerex.SliceContainer
}{
{
name: "nil",
in: nil,
},
{
name: "zero",
in: &clonerex.SliceContainer{},
},
{
name: "empty",
in: &clonerex.SliceContainer{
Slice: []*int{},
},
},
{
name: "nils",
in: &clonerex.SliceContainer{
Slice: []*int{nil, nil, nil, nil, nil},
},
},
{
name: "one",
in: &clonerex.SliceContainer{
Slice: []*int{&num},
},
},
{
name: "several",
in: &clonerex.SliceContainer{
Slice: []*int{&num, &num, &num, &num, &num},
},
},
}
for _, ex := range examples {
t.Run(ex.name, func(t *testing.T) {
out := ex.in.Clone()
if !reflect.DeepEqual(ex.in, out) {
t.Errorf("Clone() = %v, want %v", out, ex.in)
}
})
}
}
func TestInterfaceContainer(t *testing.T) {
examples := []struct {
name string
in *clonerex.InterfaceContainer
}{
{
name: "nil",
in: nil,
},
{
name: "zero",
in: &clonerex.InterfaceContainer{},
},
{
name: "with_interface",
in: &clonerex.InterfaceContainer{
Interface: &clonerex.CloneableImpl{Value: 42},
},
},
{
name: "with_nil_interface",
in: &clonerex.InterfaceContainer{
Interface: nil,
},
},
}
for _, ex := range examples {
t.Run(ex.name, func(t *testing.T) {
out := ex.in.Clone()
if !reflect.DeepEqual(ex.in, out) {
t.Errorf("Clone() = %v, want %v", out, ex.in)
}
// Verify no aliasing: modifying the clone should not affect the original
if ex.in != nil && ex.in.Interface != nil {
if impl, ok := out.Interface.(*clonerex.CloneableImpl); ok {
impl.Value = 999
if origImpl, ok := ex.in.Interface.(*clonerex.CloneableImpl); ok {
if origImpl.Value == 999 {
t.Errorf("Clone() aliased memory with original")
}
}
}
}
})
}
}
func TestMapWithPointers(t *testing.T) {
num1, num2 := 42, 100
orig := &clonerex.MapWithPointers{
Nested: map[string]*int{
"foo": &num1,
"bar": &num2,
},
WithCloneMethod: map[string]*clonerex.SliceContainer{
"container1": {Slice: []*int{&num1, &num2}},
"container2": {Slice: []*int{&num1}},
},
CloneInterface: map[string]clonerex.Cloneable{
"impl1": &clonerex.CloneableImpl{Value: 123},
"impl2": &clonerex.CloneableImpl{Value: 456},
},
}
cloned := orig.Clone()
if !reflect.DeepEqual(orig, cloned) {
t.Errorf("Clone() = %v, want %v", cloned, orig)
}
// Mutate cloned.Nested pointer values
*cloned.Nested["foo"] = 999
if *orig.Nested["foo"] == 999 {
t.Errorf("Clone() aliased memory in Nested: original was modified")
}
// Mutate cloned.WithCloneMethod slice values
*cloned.WithCloneMethod["container1"].Slice[0] = 888
if *orig.WithCloneMethod["container1"].Slice[0] == 888 {
t.Errorf("Clone() aliased memory in WithCloneMethod: original was modified")
}
// Mutate cloned.CloneInterface values
if impl, ok := cloned.CloneInterface["impl1"].(*clonerex.CloneableImpl); ok {
impl.Value = 777
if origImpl, ok := orig.CloneInterface["impl1"].(*clonerex.CloneableImpl); ok {
if origImpl.Value == 777 {
t.Errorf("Clone() aliased memory in CloneInterface: original was modified")
}
}
}
}
func TestNamedMapContainer(t *testing.T) {
orig := &clonerex.NamedMapContainer{
Attrs: clonerex.NamedMap{
"str": "hello",
"num": int64(42),
"bool": true,
},
}
cloned := orig.Clone()
if !reflect.DeepEqual(orig, cloned) {
t.Errorf("Clone() = %v, want %v", cloned, orig)
}
// Mutate the cloned map to verify no aliasing.
cloned.Attrs["str"] = "modified"
if orig.Attrs["str"] == "modified" {
t.Errorf("Clone() aliased memory in Attrs: original was modified")
}
// Verify nil handling.
nilContainer := &clonerex.NamedMapContainer{}
nilClone := nilContainer.Clone()
if !reflect.DeepEqual(nilContainer, nilClone) {
t.Errorf("Clone() of nil Attrs = %v, want %v", nilClone, nilContainer)
}
}
func TestMapSlicePointerContainer(t *testing.T) {
num := 42
orig := &clonerex.MapSlicePointerContainer{
Routes: map[string][]*clonerex.SliceContainer{
"route1": {
{Slice: []*int{&num}},
{Slice: []*int{&num, &num}},
},
"route2": {
{Slice: []*int{&num}},
},
},
}
cloned := orig.Clone()
if !reflect.DeepEqual(orig, cloned) {
t.Errorf("Clone() = %v, want %v", cloned, orig)
}
// Mutate cloned.Routes pointer values
*cloned.Routes["route1"][0].Slice[0] = 999
if *orig.Routes["route1"][0].Slice[0] == 999 {
t.Errorf("Clone() aliased memory in Routes: original was modified")
}
}
func TestDeeplyNestedMap(t *testing.T) {
num := 123
orig := &clonerex.DeeplyNestedMap{
ThreeLevels: map[string]map[string]map[string]int{
"a": {
"b": {"c": 1, "d": 2},
"e": {"f": 3},
},
"g": {
"h": {"i": 4},
},
},
FourLevels: map[string]map[string]map[string]map[string]*clonerex.SliceContainer{
"l1a": {
"l2a": {
"l3a": {
"l4a": {Slice: []*int{&num}},
"l4b": {Slice: []*int{&num, &num}},
},
},
},
},
}
cloned := orig.Clone()
if !reflect.DeepEqual(orig, cloned) {
t.Errorf("Clone() = %v, want %v", cloned, orig)
}
// Mutate the clone's ThreeLevels map
cloned.ThreeLevels["a"]["b"]["c"] = 777
if orig.ThreeLevels["a"]["b"]["c"] == 777 {
t.Errorf("Clone() aliased memory in ThreeLevels: original was modified")
}
// Mutate the clone's FourLevels map at the deepest pointer level
*cloned.FourLevels["l1a"]["l2a"]["l3a"]["l4a"].Slice[0] = 666
if *orig.FourLevels["l1a"]["l2a"]["l3a"]["l4a"].Slice[0] == 666 {
t.Errorf("Clone() aliased memory in FourLevels: original was modified")
}
// Add a new top-level key to the clone's FourLevels map
newNum := 999
cloned.FourLevels["l1b"] = map[string]map[string]map[string]*clonerex.SliceContainer{
"l2b": {
"l3b": {
"l4c": {Slice: []*int{&newNum}},
},
},
}
if _, exists := orig.FourLevels["l1b"]; exists {
t.Errorf("Clone() aliased FourLevels map: new top-level key appeared in original")
}
// Add a new nested key to the clone's FourLevels map
cloned.FourLevels["l1a"]["l2a"]["l3a"]["l4c"] = &clonerex.SliceContainer{Slice: []*int{&newNum}}
if _, exists := orig.FourLevels["l1a"]["l2a"]["l3a"]["l4c"]; exists {
t.Errorf("Clone() aliased FourLevels map: new nested key appeared in original")
}
}
|
