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|
package deepcopy
import (
"fmt"
"reflect"
"testing"
"time"
"unsafe"
)
// just basic is this working stuff
func TestSimple(t *testing.T) {
Strings := []string{"a", "b", "c"}
cpyS := Copy(Strings).([]string)
if (*reflect.SliceHeader)(unsafe.Pointer(&Strings)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpyS)).Data {
t.Error("[]string: expected SliceHeader data pointers to point to different locations, they didn't")
goto CopyBools
}
if len(cpyS) != len(Strings) {
t.Errorf("[]string: len was %d; want %d", len(cpyS), len(Strings))
goto CopyBools
}
for i, v := range Strings {
if v != cpyS[i] {
t.Errorf("[]string: got %v at index %d of the copy; want %v", cpyS[i], i, v)
}
}
CopyBools:
Bools := []bool{true, true, false, false}
cpyB := Copy(Bools).([]bool)
if (*reflect.SliceHeader)(unsafe.Pointer(&Strings)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpyB)).Data {
t.Error("[]bool: expected SliceHeader data pointers to point to different locations, they didn't")
goto CopyBytes
}
if len(cpyB) != len(Bools) {
t.Errorf("[]bool: len was %d; want %d", len(cpyB), len(Bools))
goto CopyBytes
}
for i, v := range Bools {
if v != cpyB[i] {
t.Errorf("[]bool: got %v at index %d of the copy; want %v", cpyB[i], i, v)
}
}
CopyBytes:
Bytes := []byte("hello")
cpyBt := Copy(Bytes).([]byte)
if (*reflect.SliceHeader)(unsafe.Pointer(&Strings)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpyBt)).Data {
t.Error("[]byte: expected SliceHeader data pointers to point to different locations, they didn't")
goto CopyInts
}
if len(cpyBt) != len(Bytes) {
t.Errorf("[]byte: len was %d; want %d", len(cpyBt), len(Bytes))
goto CopyInts
}
for i, v := range Bytes {
if v != cpyBt[i] {
t.Errorf("[]byte: got %v at index %d of the copy; want %v", cpyBt[i], i, v)
}
}
CopyInts:
Ints := []int{42}
cpyI := Copy(Ints).([]int)
if (*reflect.SliceHeader)(unsafe.Pointer(&Strings)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpyI)).Data {
t.Error("[]int: expected SliceHeader data pointers to point to different locations, they didn't")
goto CopyUints
}
if len(cpyI) != len(Ints) {
t.Errorf("[]int: len was %d; want %d", len(cpyI), len(Ints))
goto CopyUints
}
for i, v := range Ints {
if v != cpyI[i] {
t.Errorf("[]int: got %v at index %d of the copy; want %v", cpyI[i], i, v)
}
}
CopyUints:
Uints := []uint{1, 2, 3, 4, 5}
cpyU := Copy(Uints).([]uint)
if (*reflect.SliceHeader)(unsafe.Pointer(&Strings)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpyU)).Data {
t.Error("[]: expected SliceHeader data pointers to point to different locations, they didn't")
goto CopyFloat32s
}
if len(cpyU) != len(Uints) {
t.Errorf("[]uint: len was %d; want %d", len(cpyU), len(Uints))
goto CopyFloat32s
}
for i, v := range Uints {
if v != cpyU[i] {
t.Errorf("[]uint: got %v at index %d of the copy; want %v", cpyU[i], i, v)
}
}
CopyFloat32s:
Float32s := []float32{3.14}
cpyF := Copy(Float32s).([]float32)
if (*reflect.SliceHeader)(unsafe.Pointer(&Strings)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpyF)).Data {
t.Error("[]float32: expected SliceHeader data pointers to point to different locations, they didn't")
goto CopyInterfaces
}
if len(cpyF) != len(Float32s) {
t.Errorf("[]float32: len was %d; want %d", len(cpyF), len(Float32s))
goto CopyInterfaces
}
for i, v := range Float32s {
if v != cpyF[i] {
t.Errorf("[]float32: got %v at index %d of the copy; want %v", cpyF[i], i, v)
}
}
CopyInterfaces:
Interfaces := []interface{}{"a", 42, true, 4.32}
cpyIf := Copy(Interfaces).([]interface{})
if (*reflect.SliceHeader)(unsafe.Pointer(&Strings)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpyIf)).Data {
t.Error("[]interfaces: expected SliceHeader data pointers to point to different locations, they didn't")
return
}
if len(cpyIf) != len(Interfaces) {
t.Errorf("[]interface{}: len was %d; want %d", len(cpyIf), len(Interfaces))
return
}
for i, v := range Interfaces {
if v != cpyIf[i] {
t.Errorf("[]interface{}: got %v at index %d of the copy; want %v", cpyIf[i], i, v)
}
}
}
type Basics struct {
String string
Strings []string
StringArr [4]string
Bool bool
Bools []bool
Byte byte
Bytes []byte
Int int
Ints []int
Int8 int8
Int8s []int8
Int16 int16
Int16s []int16
Int32 int32
Int32s []int32
Int64 int64
Int64s []int64
Uint uint
Uints []uint
Uint8 uint8
Uint8s []uint8
Uint16 uint16
Uint16s []uint16
Uint32 uint32
Uint32s []uint32
Uint64 uint64
Uint64s []uint64
Float32 float32
Float32s []float32
Float64 float64
Float64s []float64
Complex64 complex64
Complex64s []complex64
Complex128 complex128
Complex128s []complex128
Interface interface{}
Interfaces []interface{}
}
// These tests test that all supported basic types are copied correctly. This
// is done by copying a struct with fields of most of the basic types as []T.
func TestMostTypes(t *testing.T) {
test := Basics{
String: "kimchi",
Strings: []string{"uni", "ika"},
StringArr: [4]string{"malort", "barenjager", "fernet", "salmiakki"},
Bool: true,
Bools: []bool{true, false, true},
Byte: 'z',
Bytes: []byte("abc"),
Int: 42,
Ints: []int{0, 1, 3, 4},
Int8: 8,
Int8s: []int8{8, 9, 10},
Int16: 16,
Int16s: []int16{16, 17, 18, 19},
Int32: 32,
Int32s: []int32{32, 33},
Int64: 64,
Int64s: []int64{64},
Uint: 420,
Uints: []uint{11, 12, 13},
Uint8: 81,
Uint8s: []uint8{81, 82},
Uint16: 160,
Uint16s: []uint16{160, 161, 162, 163, 164},
Uint32: 320,
Uint32s: []uint32{320, 321},
Uint64: 640,
Uint64s: []uint64{6400, 6401, 6402, 6403},
Float32: 32.32,
Float32s: []float32{32.32, 33},
Float64: 64.1,
Float64s: []float64{64, 65, 66},
Complex64: complex64(-64 + 12i),
Complex64s: []complex64{complex64(-65 + 11i), complex64(66 + 10i)},
Complex128: complex128(-128 + 12i),
Complex128s: []complex128{complex128(-128 + 11i), complex128(129 + 10i)},
Interfaces: []interface{}{42, true, "pan-galactic"},
}
cpy := Copy(test).(Basics)
// see if they point to the same location
if fmt.Sprintf("%p", &cpy) == fmt.Sprintf("%p", &test) {
t.Error("address of copy was the same as original; they should be different")
return
}
// Go through each field and check to see it got copied properly
if cpy.String != test.String {
t.Errorf("String: got %v; want %v", cpy.String, test.String)
}
if (*reflect.SliceHeader)(unsafe.Pointer(&test.Strings)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpy.Strings)).Data {
t.Error("Strings: address of copy was the same as original; they should be different")
goto StringArr
}
if len(cpy.Strings) != len(test.Strings) {
t.Errorf("Strings: len was %d; want %d", len(cpy.Strings), len(test.Strings))
goto StringArr
}
for i, v := range test.Strings {
if v != cpy.Strings[i] {
t.Errorf("Strings: got %v at index %d of the copy; want %v", cpy.Strings[i], i, v)
}
}
StringArr:
if unsafe.Pointer(&test.StringArr) == unsafe.Pointer(&cpy.StringArr) {
t.Error("StringArr: address of copy was the same as original; they should be different")
goto Bools
}
for i, v := range test.StringArr {
if v != cpy.StringArr[i] {
t.Errorf("StringArr: got %v at index %d of the copy; want %v", cpy.StringArr[i], i, v)
}
}
Bools:
if cpy.Bool != test.Bool {
t.Errorf("Bool: got %v; want %v", cpy.Bool, test.Bool)
}
if (*reflect.SliceHeader)(unsafe.Pointer(&test.Bools)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpy.Bools)).Data {
t.Error("Bools: address of copy was the same as original; they should be different")
goto Bytes
}
if len(cpy.Bools) != len(test.Bools) {
t.Errorf("Bools: len was %d; want %d", len(cpy.Bools), len(test.Bools))
goto Bytes
}
for i, v := range test.Bools {
if v != cpy.Bools[i] {
t.Errorf("Bools: got %v at index %d of the copy; want %v", cpy.Bools[i], i, v)
}
}
Bytes:
if cpy.Byte != test.Byte {
t.Errorf("Byte: got %v; want %v", cpy.Byte, test.Byte)
}
if (*reflect.SliceHeader)(unsafe.Pointer(&test.Bytes)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpy.Bytes)).Data {
t.Error("Bytes: address of copy was the same as original; they should be different")
goto Ints
}
if len(cpy.Bytes) != len(test.Bytes) {
t.Errorf("Bytes: len was %d; want %d", len(cpy.Bytes), len(test.Bytes))
goto Ints
}
for i, v := range test.Bytes {
if v != cpy.Bytes[i] {
t.Errorf("Bytes: got %v at index %d of the copy; want %v", cpy.Bytes[i], i, v)
}
}
Ints:
if cpy.Int != test.Int {
t.Errorf("Int: got %v; want %v", cpy.Int, test.Int)
}
if (*reflect.SliceHeader)(unsafe.Pointer(&test.Ints)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpy.Ints)).Data {
t.Error("Ints: address of copy was the same as original; they should be different")
goto Int8s
}
if len(cpy.Ints) != len(test.Ints) {
t.Errorf("Ints: len was %d; want %d", len(cpy.Ints), len(test.Ints))
goto Int8s
}
for i, v := range test.Ints {
if v != cpy.Ints[i] {
t.Errorf("Ints: got %v at index %d of the copy; want %v", cpy.Ints[i], i, v)
}
}
Int8s:
if cpy.Int8 != test.Int8 {
t.Errorf("Int8: got %v; want %v", cpy.Int8, test.Int8)
}
if (*reflect.SliceHeader)(unsafe.Pointer(&test.Int8s)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpy.Int8s)).Data {
t.Error("Int8s: address of copy was the same as original; they should be different")
goto Int16s
}
if len(cpy.Int8s) != len(test.Int8s) {
t.Errorf("Int8s: len was %d; want %d", len(cpy.Int8s), len(test.Int8s))
goto Int16s
}
for i, v := range test.Int8s {
if v != cpy.Int8s[i] {
t.Errorf("Int8s: got %v at index %d of the copy; want %v", cpy.Int8s[i], i, v)
}
}
Int16s:
if cpy.Int16 != test.Int16 {
t.Errorf("Int16: got %v; want %v", cpy.Int16, test.Int16)
}
if (*reflect.SliceHeader)(unsafe.Pointer(&test.Int16s)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpy.Int16s)).Data {
t.Error("Int16s: address of copy was the same as original; they should be different")
goto Int32s
}
if len(cpy.Int16s) != len(test.Int16s) {
t.Errorf("Int16s: len was %d; want %d", len(cpy.Int16s), len(test.Int16s))
goto Int32s
}
for i, v := range test.Int16s {
if v != cpy.Int16s[i] {
t.Errorf("Int16s: got %v at index %d of the copy; want %v", cpy.Int16s[i], i, v)
}
}
Int32s:
if cpy.Int32 != test.Int32 {
t.Errorf("Int32: got %v; want %v", cpy.Int32, test.Int32)
}
if (*reflect.SliceHeader)(unsafe.Pointer(&test.Int32s)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpy.Int32s)).Data {
t.Error("Int32s: address of copy was the same as original; they should be different")
goto Int64s
}
if len(cpy.Int32s) != len(test.Int32s) {
t.Errorf("Int32s: len was %d; want %d", len(cpy.Int32s), len(test.Int32s))
goto Int64s
}
for i, v := range test.Int32s {
if v != cpy.Int32s[i] {
t.Errorf("Int32s: got %v at index %d of the copy; want %v", cpy.Int32s[i], i, v)
}
}
Int64s:
if cpy.Int64 != test.Int64 {
t.Errorf("Int64: got %v; want %v", cpy.Int64, test.Int64)
}
if (*reflect.SliceHeader)(unsafe.Pointer(&test.Int64s)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpy.Int64s)).Data {
t.Error("Int64s: address of copy was the same as original; they should be different")
goto Uints
}
if len(cpy.Int64s) != len(test.Int64s) {
t.Errorf("Int64s: len was %d; want %d", len(cpy.Int64s), len(test.Int64s))
goto Uints
}
for i, v := range test.Int64s {
if v != cpy.Int64s[i] {
t.Errorf("Int64s: got %v at index %d of the copy; want %v", cpy.Int64s[i], i, v)
}
}
Uints:
if cpy.Uint != test.Uint {
t.Errorf("Uint: got %v; want %v", cpy.Uint, test.Uint)
}
if (*reflect.SliceHeader)(unsafe.Pointer(&test.Uints)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpy.Uints)).Data {
t.Error("Uints: address of copy was the same as original; they should be different")
goto Uint8s
}
if len(cpy.Uints) != len(test.Uints) {
t.Errorf("Uints: len was %d; want %d", len(cpy.Uints), len(test.Uints))
goto Uint8s
}
for i, v := range test.Uints {
if v != cpy.Uints[i] {
t.Errorf("Uints: got %v at index %d of the copy; want %v", cpy.Uints[i], i, v)
}
}
Uint8s:
if cpy.Uint8 != test.Uint8 {
t.Errorf("Uint8: got %v; want %v", cpy.Uint8, test.Uint8)
}
if (*reflect.SliceHeader)(unsafe.Pointer(&test.Uint8s)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpy.Uint8s)).Data {
t.Error("Uint8s: address of copy was the same as original; they should be different")
goto Uint16s
}
if len(cpy.Uint8s) != len(test.Uint8s) {
t.Errorf("Uint8s: len was %d; want %d", len(cpy.Uint8s), len(test.Uint8s))
goto Uint16s
}
for i, v := range test.Uint8s {
if v != cpy.Uint8s[i] {
t.Errorf("Uint8s: got %v at index %d of the copy; want %v", cpy.Uint8s[i], i, v)
}
}
Uint16s:
if cpy.Uint16 != test.Uint16 {
t.Errorf("Uint16: got %v; want %v", cpy.Uint16, test.Uint16)
}
if (*reflect.SliceHeader)(unsafe.Pointer(&test.Uint16s)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpy.Uint16s)).Data {
t.Error("Uint16s: address of copy was the same as original; they should be different")
goto Uint32s
}
if len(cpy.Uint16s) != len(test.Uint16s) {
t.Errorf("Uint16s: len was %d; want %d", len(cpy.Uint16s), len(test.Uint16s))
goto Uint32s
}
for i, v := range test.Uint16s {
if v != cpy.Uint16s[i] {
t.Errorf("Uint16s: got %v at index %d of the copy; want %v", cpy.Uint16s[i], i, v)
}
}
Uint32s:
if cpy.Uint32 != test.Uint32 {
t.Errorf("Uint32: got %v; want %v", cpy.Uint32, test.Uint32)
}
if (*reflect.SliceHeader)(unsafe.Pointer(&test.Uint32s)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpy.Uint32s)).Data {
t.Error("Uint32s: address of copy was the same as original; they should be different")
goto Uint64s
}
if len(cpy.Uint32s) != len(test.Uint32s) {
t.Errorf("Uint32s: len was %d; want %d", len(cpy.Uint32s), len(test.Uint32s))
goto Uint64s
}
for i, v := range test.Uint32s {
if v != cpy.Uint32s[i] {
t.Errorf("Uint32s: got %v at index %d of the copy; want %v", cpy.Uint32s[i], i, v)
}
}
Uint64s:
if cpy.Uint64 != test.Uint64 {
t.Errorf("Uint64: got %v; want %v", cpy.Uint64, test.Uint64)
}
if (*reflect.SliceHeader)(unsafe.Pointer(&test.Uint64s)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpy.Uint64s)).Data {
t.Error("Uint64s: address of copy was the same as original; they should be different")
goto Float32s
}
if len(cpy.Uint64s) != len(test.Uint64s) {
t.Errorf("Uint64s: len was %d; want %d", len(cpy.Uint64s), len(test.Uint64s))
goto Float32s
}
for i, v := range test.Uint64s {
if v != cpy.Uint64s[i] {
t.Errorf("Uint64s: got %v at index %d of the copy; want %v", cpy.Uint64s[i], i, v)
}
}
Float32s:
if cpy.Float32 != test.Float32 {
t.Errorf("Float32: got %v; want %v", cpy.Float32, test.Float32)
}
if (*reflect.SliceHeader)(unsafe.Pointer(&test.Float32s)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpy.Float32s)).Data {
t.Error("Float32s: address of copy was the same as original; they should be different")
goto Float64s
}
if len(cpy.Float32s) != len(test.Float32s) {
t.Errorf("Float32s: len was %d; want %d", len(cpy.Float32s), len(test.Float32s))
goto Float64s
}
for i, v := range test.Float32s {
if v != cpy.Float32s[i] {
t.Errorf("Float32s: got %v at index %d of the copy; want %v", cpy.Float32s[i], i, v)
}
}
Float64s:
if cpy.Float64 != test.Float64 {
t.Errorf("Float64: got %v; want %v", cpy.Float64, test.Float64)
}
if (*reflect.SliceHeader)(unsafe.Pointer(&test.Float64s)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpy.Float64s)).Data {
t.Error("Float64s: address of copy was the same as original; they should be different")
goto Complex64s
}
if len(cpy.Float64s) != len(test.Float64s) {
t.Errorf("Float64s: len was %d; want %d", len(cpy.Float64s), len(test.Float64s))
goto Complex64s
}
for i, v := range test.Float64s {
if v != cpy.Float64s[i] {
t.Errorf("Float64s: got %v at index %d of the copy; want %v", cpy.Float64s[i], i, v)
}
}
Complex64s:
if cpy.Complex64 != test.Complex64 {
t.Errorf("Complex64: got %v; want %v", cpy.Complex64, test.Complex64)
}
if (*reflect.SliceHeader)(unsafe.Pointer(&test.Complex64s)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpy.Complex64s)).Data {
t.Error("Complex64s: address of copy was the same as original; they should be different")
goto Complex128s
}
if len(cpy.Complex64s) != len(test.Complex64s) {
t.Errorf("Complex64s: len was %d; want %d", len(cpy.Complex64s), len(test.Complex64s))
goto Complex128s
}
for i, v := range test.Complex64s {
if v != cpy.Complex64s[i] {
t.Errorf("Complex64s: got %v at index %d of the copy; want %v", cpy.Complex64s[i], i, v)
}
}
Complex128s:
if cpy.Complex128 != test.Complex128 {
t.Errorf("Complex128s: got %v; want %v", cpy.Complex128s, test.Complex128s)
}
if (*reflect.SliceHeader)(unsafe.Pointer(&test.Complex128s)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpy.Complex128s)).Data {
t.Error("Complex128s: address of copy was the same as original; they should be different")
goto Interfaces
}
if len(cpy.Complex128s) != len(test.Complex128s) {
t.Errorf("Complex128s: len was %d; want %d", len(cpy.Complex128s), len(test.Complex128s))
goto Interfaces
}
for i, v := range test.Complex128s {
if v != cpy.Complex128s[i] {
t.Errorf("Complex128s: got %v at index %d of the copy; want %v", cpy.Complex128s[i], i, v)
}
}
Interfaces:
if cpy.Interface != test.Interface {
t.Errorf("Interface: got %v; want %v", cpy.Interface, test.Interface)
}
if (*reflect.SliceHeader)(unsafe.Pointer(&test.Interfaces)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpy.Interfaces)).Data {
t.Error("Interfaces: address of copy was the same as original; they should be different")
return
}
if len(cpy.Interfaces) != len(test.Interfaces) {
t.Errorf("Interfaces: len was %d; want %d", len(cpy.Interfaces), len(test.Interfaces))
return
}
for i, v := range test.Interfaces {
if v != cpy.Interfaces[i] {
t.Errorf("Interfaces: got %v at index %d of the copy; want %v", cpy.Interfaces[i], i, v)
}
}
}
// not meant to be exhaustive
func TestComplexSlices(t *testing.T) {
orig3Int := [][][]int{[][]int{[]int{1, 2, 3}, []int{11, 22, 33}}, [][]int{[]int{7, 8, 9}, []int{66, 77, 88, 99}}}
cpyI := Copy(orig3Int).([][][]int)
if (*reflect.SliceHeader)(unsafe.Pointer(&orig3Int)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpyI)).Data {
t.Error("[][][]int: address of copy was the same as original; they should be different")
return
}
if len(orig3Int) != len(cpyI) {
t.Errorf("[][][]int: len of copy was %d; want %d", len(cpyI), len(orig3Int))
goto sliceMap
}
for i, v := range orig3Int {
if len(v) != len(cpyI[i]) {
t.Errorf("[][][]int: len of element %d was %d; want %d", i, len(cpyI[i]), len(v))
continue
}
for j, vv := range v {
if len(vv) != len(cpyI[i][j]) {
t.Errorf("[][][]int: len of element %d:%d was %d, want %d", i, j, len(cpyI[i][j]), len(vv))
continue
}
for k, vvv := range vv {
if vvv != cpyI[i][j][k] {
t.Errorf("[][][]int: element %d:%d:%d was %d, want %d", i, j, k, cpyI[i][j][k], vvv)
}
}
}
}
sliceMap:
slMap := []map[int]string{map[int]string{0: "a", 1: "b"}, map[int]string{10: "k", 11: "l", 12: "m"}}
cpyM := Copy(slMap).([]map[int]string)
if (*reflect.SliceHeader)(unsafe.Pointer(&slMap)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpyM)).Data {
t.Error("[]map[int]string: address of copy was the same as original; they should be different")
}
if len(slMap) != len(cpyM) {
t.Errorf("[]map[int]string: len of copy was %d; want %d", len(cpyM), len(slMap))
goto done
}
for i, v := range slMap {
if len(v) != len(cpyM[i]) {
t.Errorf("[]map[int]string: len of element %d was %d; want %d", i, len(cpyM[i]), len(v))
continue
}
for k, vv := range v {
val, ok := cpyM[i][k]
if !ok {
t.Errorf("[]map[int]string: element %d was expected to have a value at key %d, it didn't", i, k)
continue
}
if val != vv {
t.Errorf("[]map[int]string: element %d, key %d: got %s, want %s", i, k, val, vv)
}
}
}
done:
}
type A struct {
Int int
String string
UintSl []uint
NilSl []string
Map map[string]int
MapB map[string]*B
SliceB []B
B
T time.Time
}
type B struct {
Vals []string
}
var AStruct = A{
Int: 42,
String: "Konichiwa",
UintSl: []uint{0, 1, 2, 3},
Map: map[string]int{"a": 1, "b": 2},
MapB: map[string]*B{
"hi": &B{Vals: []string{"hello", "bonjour"}},
"bye": &B{Vals: []string{"good-bye", "au revoir"}},
},
SliceB: []B{
B{Vals: []string{"Ciao", "Aloha"}},
},
B: B{Vals: []string{"42"}},
T: time.Now(),
}
func TestStructA(t *testing.T) {
cpy := Copy(AStruct).(A)
if &cpy == &AStruct {
t.Error("expected copy to have a different address than the original; it was the same")
return
}
if cpy.Int != AStruct.Int {
t.Errorf("A.Int: got %v, want %v", cpy.Int, AStruct.Int)
}
if cpy.String != AStruct.String {
t.Errorf("A.String: got %v; want %v", cpy.String, AStruct.String)
}
if (*reflect.SliceHeader)(unsafe.Pointer(&cpy.UintSl)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&AStruct.UintSl)).Data {
t.Error("A.Uintsl: expected the copies address to be different; it wasn't")
goto NilSl
}
if len(cpy.UintSl) != len(AStruct.UintSl) {
t.Errorf("A.UintSl: got len of %d, want %d", len(cpy.UintSl), len(AStruct.UintSl))
goto NilSl
}
for i, v := range AStruct.UintSl {
if cpy.UintSl[i] != v {
t.Errorf("A.UintSl %d: got %d, want %d", i, cpy.UintSl[i], v)
}
}
NilSl:
if cpy.NilSl != nil {
t.Error("A.NilSl: expected slice to be nil, it wasn't")
}
if *(*uintptr)(unsafe.Pointer(&cpy.Map)) == *(*uintptr)(unsafe.Pointer(&AStruct.Map)) {
t.Error("A.Map: expected the copy's address to be different; it wasn't")
goto AMapB
}
if len(cpy.Map) != len(AStruct.Map) {
t.Errorf("A.Map: got len of %d, want %d", len(cpy.Map), len(AStruct.Map))
goto AMapB
}
for k, v := range AStruct.Map {
val, ok := cpy.Map[k]
if !ok {
t.Errorf("A.Map: expected the key %s to exist in the copy, it didn't", k)
continue
}
if val != v {
t.Errorf("A.Map[%s]: got %d, want %d", k, val, v)
}
}
AMapB:
if *(*uintptr)(unsafe.Pointer(&cpy.MapB)) == *(*uintptr)(unsafe.Pointer(&AStruct.MapB)) {
t.Error("A.MapB: expected the copy's address to be different; it wasn't")
goto ASliceB
}
if len(cpy.MapB) != len(AStruct.MapB) {
t.Errorf("A.MapB: got len of %d, want %d", len(cpy.MapB), len(AStruct.MapB))
goto ASliceB
}
for k, v := range AStruct.MapB {
val, ok := cpy.MapB[k]
if !ok {
t.Errorf("A.MapB: expected the key %s to exist in the copy, it didn't", k)
continue
}
if unsafe.Pointer(val) == unsafe.Pointer(v) {
t.Errorf("A.MapB[%s]: expected the addresses of the values to be different; they weren't", k)
continue
}
// the slice headers should point to different data
if (*reflect.SliceHeader)(unsafe.Pointer(&v.Vals)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&val.Vals)).Data {
t.Errorf("%s: expected B's SliceHeaders to point to different Data locations; they did not.", k)
continue
}
for i, vv := range v.Vals {
if vv != val.Vals[i] {
t.Errorf("A.MapB[%s].Vals[%d]: got %s want %s", k, i, vv, val.Vals[i])
}
}
}
ASliceB:
if (*reflect.SliceHeader)(unsafe.Pointer(&AStruct.SliceB)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpy.SliceB)).Data {
t.Error("A.SliceB: expected the copy's address to be different; it wasn't")
goto B
}
if len(AStruct.SliceB) != len(cpy.SliceB) {
t.Errorf("A.SliceB: got length of %d; want %d", len(cpy.SliceB), len(AStruct.SliceB))
goto B
}
for i := range AStruct.SliceB {
if unsafe.Pointer(&AStruct.SliceB[i]) == unsafe.Pointer(&cpy.SliceB[i]) {
t.Errorf("A.SliceB[%d]: expected them to have different addresses, they didn't", i)
continue
}
if (*reflect.SliceHeader)(unsafe.Pointer(&AStruct.SliceB[i].Vals)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpy.SliceB[i].Vals)).Data {
t.Errorf("A.SliceB[%d]: expected B.Vals SliceHeader.Data to point to different locations; they did not", i)
continue
}
if len(AStruct.SliceB[i].Vals) != len(cpy.SliceB[i].Vals) {
t.Errorf("A.SliceB[%d]: expected B's vals to have the same length, they didn't", i)
continue
}
for j, val := range AStruct.SliceB[i].Vals {
if val != cpy.SliceB[i].Vals[j] {
t.Errorf("A.SliceB[%d].Vals[%d]: got %v; want %v", i, j, cpy.SliceB[i].Vals[j], val)
}
}
}
B:
if unsafe.Pointer(&AStruct.B) == unsafe.Pointer(&cpy.B) {
t.Error("A.B: expected them to have different addresses, they didn't")
goto T
}
if (*reflect.SliceHeader)(unsafe.Pointer(&AStruct.B.Vals)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&cpy.B.Vals)).Data {
t.Error("A.B.Vals: expected the SliceHeaders.Data to point to different locations; they didn't")
goto T
}
if len(AStruct.B.Vals) != len(cpy.B.Vals) {
t.Error("A.B.Vals: expected their lengths to be the same, they weren't")
goto T
}
for i, v := range AStruct.B.Vals {
if v != cpy.B.Vals[i] {
t.Errorf("A.B.Vals[%d]: got %s want %s", i, cpy.B.Vals[i], v)
}
}
T:
if fmt.Sprintf("%p", &AStruct.T) == fmt.Sprintf("%p", &cpy.T) {
t.Error("A.T: expected them to have different addresses, they didn't")
return
}
if AStruct.T != cpy.T {
t.Errorf("A.T: got %v, want %v", cpy.T, AStruct.T)
}
}
type Unexported struct {
A string
B int
aa string
bb int
cc []int
dd map[string]string
}
func TestUnexportedFields(t *testing.T) {
u := &Unexported{
A: "A",
B: 42,
aa: "aa",
bb: 42,
cc: []int{1, 2, 3},
dd: map[string]string{"hello": "bonjour"},
}
cpy := Copy(u).(*Unexported)
if cpy == u {
t.Error("expected addresses to be different, they weren't")
return
}
if u.A != cpy.A {
t.Errorf("Unexported.A: got %s want %s", cpy.A, u.A)
}
if u.B != cpy.B {
t.Errorf("Unexported.A: got %d want %d", cpy.B, u.B)
}
if cpy.aa != "" {
t.Errorf("Unexported.aa: unexported field should not be set, it was set to %s", cpy.aa)
}
if cpy.bb != 0 {
t.Errorf("Unexported.bb: unexported field should not be set, it was set to %d", cpy.bb)
}
if cpy.cc != nil {
t.Errorf("Unexported.cc: unexported field should not be set, it was set to %#v", cpy.cc)
}
if cpy.dd != nil {
t.Errorf("Unexported.dd: unexported field should not be set, it was set to %#v", cpy.dd)
}
}
// Note: this test will fail until https://github.com/golang/go/issues/15716 is
// fixed and the version it is part of gets released.
type T struct {
time.Time
}
func TestTimeCopy(t *testing.T) {
tests := []struct {
Y int
M time.Month
D int
h int
m int
s int
nsec int
TZ string
}{
{2016, time.July, 4, 23, 11, 33, 3000, "America/New_York"},
{2015, time.October, 31, 9, 44, 23, 45935, "UTC"},
{2014, time.May, 5, 22, 01, 50, 219300, "Europe/Prague"},
}
for i, test := range tests {
l, err := time.LoadLocation(test.TZ)
if err != nil {
t.Errorf("%d: unexpected error: %s", i, err)
continue
}
var x T
x.Time = time.Date(test.Y, test.M, test.D, test.h, test.m, test.s, test.nsec, l)
c := Copy(x).(T)
if fmt.Sprintf("%p", &c) == fmt.Sprintf("%p", &x) {
t.Errorf("%d: expected the copy to have a different address than the original value; they were the same: %p %p", i, &c, &x)
continue
}
if x.UnixNano() != c.UnixNano() {
t.Errorf("%d: nanotime: got %v; want %v", i, c.UnixNano(), x.UnixNano())
continue
}
if x.Location() != c.Location() {
t.Errorf("%d: location: got %q; want %q", i, c.Location(), x.Location())
}
}
}
func TestPointerToStruct(t *testing.T) {
type Foo struct {
Bar int
}
f := &Foo{Bar: 42}
cpy := Copy(f)
if f == cpy {
t.Errorf("expected copy to point to a different location: orig: %p; copy: %p", f, cpy)
}
if !reflect.DeepEqual(f, cpy) {
t.Errorf("expected the copy to be equal to the original (except for memory location); it wasn't: got %#v; want %#v", f, cpy)
}
}
func TestIssue9(t *testing.T) {
// simple pointer copy
x := 42
testA := map[string]*int{
"a": nil,
"b": &x,
}
copyA := Copy(testA).(map[string]*int)
if unsafe.Pointer(&testA) == unsafe.Pointer(©A) {
t.Fatalf("expected the map pointers to be different: testA: %v\tcopyA: %v", unsafe.Pointer(&testA), unsafe.Pointer(©A))
}
if !reflect.DeepEqual(testA, copyA) {
t.Errorf("got %#v; want %#v", copyA, testA)
}
if testA["b"] == copyA["b"] {
t.Errorf("entries for 'b' pointed to the same address: %v; expected them to point to different addresses", testA["b"])
}
// map copy
type Foo struct {
Alpha string
}
type Bar struct {
Beta string
Gamma int
Delta *Foo
}
type Biz struct {
Epsilon map[int]*Bar
}
testB := Biz{
Epsilon: map[int]*Bar{
0: &Bar{},
1: &Bar{
Beta: "don't panic",
Gamma: 42,
Delta: nil,
},
2: &Bar{
Beta: "sudo make me a sandwich.",
Gamma: 11,
Delta: &Foo{
Alpha: "okay.",
},
},
},
}
copyB := Copy(testB).(Biz)
if !reflect.DeepEqual(testB, copyB) {
t.Errorf("got %#v; want %#v", copyB, testB)
return
}
// check that the maps point to different locations
if unsafe.Pointer(&testB.Epsilon) == unsafe.Pointer(©B.Epsilon) {
t.Fatalf("expected the map pointers to be different; they weren't: testB: %v\tcopyB: %v", unsafe.Pointer(&testB.Epsilon), unsafe.Pointer(©B.Epsilon))
}
for k, v := range testB.Epsilon {
if v == nil && copyB.Epsilon[k] == nil {
continue
}
if v == nil && copyB.Epsilon[k] != nil {
t.Errorf("%d: expected copy of a nil entry to be nil; it wasn't: %#v", k, copyB.Epsilon[k])
continue
}
if v == copyB.Epsilon[k] {
t.Errorf("entries for '%d' pointed to the same address: %v; expected them to point to different addresses", k, v)
continue
}
if v.Beta != copyB.Epsilon[k].Beta {
t.Errorf("%d.Beta: got %q; want %q", k, copyB.Epsilon[k].Beta, v.Beta)
}
if v.Gamma != copyB.Epsilon[k].Gamma {
t.Errorf("%d.Gamma: got %d; want %d", k, copyB.Epsilon[k].Gamma, v.Gamma)
}
if v.Delta == nil && copyB.Epsilon[k].Delta == nil {
continue
}
if v.Delta == nil && copyB.Epsilon[k].Delta != nil {
t.Errorf("%d.Delta: got %#v; want nil", k, copyB.Epsilon[k].Delta)
}
if v.Delta == copyB.Epsilon[k].Delta {
t.Errorf("%d.Delta: expected the pointers to be different, they were the same: %v", k, v.Delta)
continue
}
if v.Delta.Alpha != copyB.Epsilon[k].Delta.Alpha {
t.Errorf("%d.Delta.Foo: got %q; want %q", k, v.Delta.Alpha, copyB.Epsilon[k].Delta.Alpha)
}
}
// test that map keys are deep copied
testC := map[*Foo][]string{
&Foo{Alpha: "Henry Dorsett Case"}: []string{
"Cutter",
},
&Foo{Alpha: "Molly Millions"}: []string{
"Rose Kolodny",
"Cat Mother",
"Steppin' Razor",
},
}
copyC := Copy(testC).(map[*Foo][]string)
if unsafe.Pointer(&testC) == unsafe.Pointer(©C) {
t.Fatalf("expected the map pointers to be different; they weren't: testB: %v\tcopyB: %v", unsafe.Pointer(&testB.Epsilon), unsafe.Pointer(©B.Epsilon))
}
// make sure the lengths are the same
if len(testC) != len(copyC) {
t.Fatalf("got len %d; want %d", len(copyC), len(testC))
}
// check that everything was deep copied: since the key is a pointer, we check to
// see if the pointers are different but the values being pointed to are the same.
for k, v := range testC {
for kk, vv := range copyC {
if *kk == *k {
if kk == k {
t.Errorf("key pointers should be different: orig: %p; copy: %p", k, kk)
}
// check that the slices are the same but different
if !reflect.DeepEqual(v, vv) {
t.Errorf("expected slice contents to be the same; they weren't: orig: %v; copy: %v", v, vv)
}
if (*reflect.SliceHeader)(unsafe.Pointer(&v)).Data == (*reflect.SliceHeader)(unsafe.Pointer(&vv)).Data {
t.Errorf("expected the SliceHeaders.Data to point to different locations; they didn't: %v", (*reflect.SliceHeader)(unsafe.Pointer(&v)).Data)
}
break
}
}
}
type Bizz struct {
*Foo
}
testD := map[Bizz]string{
Bizz{&Foo{"Neuromancer"}}: "Rio",
Bizz{&Foo{"Wintermute"}}: "Berne",
}
copyD := Copy(testD).(map[Bizz]string)
if len(copyD) != len(testD) {
t.Fatalf("copy had %d elements; expected %d", len(copyD), len(testD))
}
for k, v := range testD {
var found bool
for kk, vv := range copyD {
if reflect.DeepEqual(k, kk) {
found = true
// check that Foo points to different locations
if unsafe.Pointer(k.Foo) == unsafe.Pointer(kk.Foo) {
t.Errorf("Expected Foo to point to different locations; they didn't: orig: %p; copy %p", k.Foo, kk.Foo)
break
}
if *k.Foo != *kk.Foo {
t.Errorf("Expected copy of the key's Foo field to have the same value as the original, it wasn't: orig: %#v; copy: %#v", k.Foo, kk.Foo)
}
if v != vv {
t.Errorf("Expected the values to be the same; the weren't: got %v; want %v", vv, v)
}
}
}
if !found {
t.Errorf("expected key %v to exist in the copy; it didn't", k)
}
}
}
type I struct {
A string
}
func (i *I) DeepCopy() interface{} {
return &I{A: "custom copy"}
}
type NestI struct {
I *I
}
func TestInterface(t *testing.T) {
i := &I{A: "A"}
copied := Copy(i).(*I)
if copied.A != "custom copy" {
t.Errorf("expected value %v, but it's %v", "custom copy", copied.A)
}
// check for nesting values
ni := &NestI{I: &I{A: "A"}}
copiedNest := Copy(ni).(*NestI)
if copiedNest.I.A != "custom copy" {
t.Errorf("expected value %v, but it's %v", "custom copy", copiedNest.I.A)
}
}
|