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How to use CopyValue method of dark Package

Best Go-testdeep code snippet using dark.CopyValue

copy.go

Source:copy.go

...9	"unicode"10	"unicode/utf8"11	"github.com/maxatome/go-testdeep/helpers/tdutil"12)13// CopyValue does its best to copy val in a new [reflect.Value] instance.14func CopyValue(val reflect.Value) (reflect.Value, bool) {15	if val.Kind() == reflect.Ptr {16		if val.IsNil() {17			newPtrVal := reflect.New(val.Type())18			return newPtrVal.Elem(), true19		}20		refVal, ok := CopyValue(val.Elem())21		if !ok {22			return reflect.Value{}, false23		}24		newPtrVal := reflect.New(refVal.Type())25		newPtrVal.Elem().Set(refVal)26		return newPtrVal, true27	}28	var newVal reflect.Value29	switch val.Kind() {30	case reflect.Bool:31		newPtrVal := reflect.New(val.Type())32		newVal = newPtrVal.Elem()33		newVal.SetBool(val.Bool())34	case reflect.Complex64, reflect.Complex128:35		newPtrVal := reflect.New(val.Type())36		newVal = newPtrVal.Elem()37		newVal.SetComplex(val.Complex())38	case reflect.Float32, reflect.Float64:39		newPtrVal := reflect.New(val.Type())40		newVal = newPtrVal.Elem()41		newVal.SetFloat(val.Float())42	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:43		newPtrVal := reflect.New(val.Type())44		newVal = newPtrVal.Elem()45		newVal.SetInt(val.Int())46	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:47		newPtrVal := reflect.New(val.Type())48		newVal = newPtrVal.Elem()49		newVal.SetUint(val.Uint())50	case reflect.Array:51		newPtrVal := reflect.New(val.Type())52		newVal = newPtrVal.Elem()53		var (54			item reflect.Value55			ok   bool56		)57		for i := val.Len() - 1; i >= 0; i-- {58			item, ok = CopyValue(val.Index(i))59			if !ok {60				return reflect.Value{}, false61			}62			newVal.Index(i).Set(item)63		}64	case reflect.Slice:65		if val.IsNil() {66			newPtrVal := reflect.New(val.Type())67			return newPtrVal.Elem(), true68		}69		newVal = reflect.MakeSlice(val.Type(), val.Len(), val.Cap())70		var (71			item reflect.Value72			ok   bool73		)74		for i := val.Len() - 1; i >= 0; i-- {75			item, ok = CopyValue(val.Index(i))76			if !ok {77				return reflect.Value{}, false78			}79			newVal.Index(i).Set(item)80		}81	case reflect.Map:82		if val.IsNil() {83			newPtrVal := reflect.New(val.Type())84			return newPtrVal.Elem(), true85		}86		newVal = reflect.MakeMapWithSize(val.Type(), val.Len())87		var (88			key, value reflect.Value89			ok         bool90		)91		if !tdutil.MapEach(val, func(k, v reflect.Value) bool {92			key, ok = CopyValue(k)93			if !ok {94				return false95			}96			value, ok = CopyValue(v)97			if !ok {98				return false99			}100			newVal.SetMapIndex(key, value)101			return true102		}) {103			return reflect.Value{}, false104		}105	case reflect.Interface:106		if val.IsNil() {107			newPtrVal := reflect.New(val.Type())108			return newPtrVal.Elem(), true109		}110		newPtrVal := reflect.New(val.Type())111		newVal = newPtrVal.Elem()112		refVal, ok := CopyValue(val.Elem())113		if !ok {114			return reflect.Value{}, false115		}116		newVal.Set(refVal)117	case reflect.String:118		newPtrVal := reflect.New(val.Type())119		newVal = newPtrVal.Elem()120		newVal.SetString(val.String())121	case reflect.Struct:122		// First, check if all fields are public123		sType := val.Type()124		for i, n := 0, val.NumField(); i < n; i++ {125			r, _ := utf8.DecodeRuneInString(sType.Field(i).Name)126			if !unicode.IsUpper(r) {127				return reflect.Value{}, false128			}129		}130		// OK all fields are public131		newPtrVal := reflect.New(sType)132		newVal = newPtrVal.Elem()133		var (134			fieldIdx []int135			fieldVal reflect.Value136			ok       bool137		)138		for i, n := 0, val.NumField(); i < n; i++ {139			fieldIdx = sType.Field(i).Index140			fieldVal, ok = CopyValue(val.FieldByIndex(fieldIdx))141			if !ok {142				return reflect.Value{}, false // Should not happen as already checked143			}144			newVal.FieldByIndex(fieldIdx).Set(fieldVal)145		}146		// Does not handle Chan, Func and UnsafePointer147	default:148		return reflect.Value{}, false149	}150	return newVal, true151}...

copy_test.go

Source:copy_test.go

...16	t.Helper()17	testName := "field " + fieldName18	fieldOrig := s.FieldByName(fieldName)19	test.IsFalse(t, fieldOrig.CanInterface(), testName+" + fieldOrig.CanInterface()")20	fieldCopy, ok := dark.CopyValue(fieldOrig)21	if test.IsTrue(t, ok, "Can copy "+testName) {22		if test.IsTrue(t, fieldCopy.CanInterface(), testName+" + fieldCopy.CanInterface()") {23			test.IsTrue(t, reflect.DeepEqual(fieldCopy.Interface(), value),24				testName+" + fieldCopy contents")25		}26	}27}28func checkFieldValueNOK(t *testing.T, s reflect.Value, fieldName string) {29	t.Helper()30	testName := "field " + fieldName31	fieldOrig := s.FieldByName(fieldName)32	test.IsFalse(t, fieldOrig.CanInterface(), testName+" + fieldOrig.CanInterface()")33	_, ok := dark.CopyValue(fieldOrig)34	test.IsFalse(t, ok, "Could not copy "+testName)35}36func TestCopyValue(t *testing.T) {37	// Note that even if all the fields are public, a Struct cannot be copied38	type SubPublic struct {39		Public int40	}41	type SubPrivate struct {42		private int //nolint: unused,megacheck,staticcheck43	}44	type Private struct {45		boolean  bool46		integer  int47		uinteger uint48		cplx     complex12849		flt      float6450		str      string...

interface.go

Source:interface.go

...26			return val.Interface(), true27		}28	}29	// For some types, we can copy them in new visitable reflect.Value instances30	copyVal, ok := CopyValue(val)31	if ok && copyVal.CanInterface() {32		return copyVal.Interface(), true33	}34	// For others, in environments where "unsafe" package is not35	// available, we cannot go further36	return nil, false37}38// MustGetInterface does its best to return the data behind val. If it39// fails (struct private + non-copyable field), it panics.40func MustGetInterface(val reflect.Value) any {41	ret, ok := GetInterface(val, true)42	if ok {43		return ret44	}...

CopyValue

Using AI Code Generation

1import (2func main() {3    xlFile, err := xlsx.OpenFile("Book1.xlsx")4    if err != nil {5        panic(err)6    }7    fmt.Println(value)8    cell.CopyValue(sheet.Rows[0].Cells[1])9    xlFile.Save("Book1.xlsx")10}

CopyValue

Using AI Code Generation

1import "fmt"2func main() {3    fmt.Println("value of a is", a)4    fmt.Println("value of b is", b)5    fmt.Println("value of a is", a)6    fmt.Println("value of b is", b)7}

CopyValue

Using AI Code Generation

1import (2func main() {3	fmt.Println("Before Copying")4	fmt.Println("x=", x)5	fmt.Println("y=", y)6	reflect.CopyValue(reflect.ValueOf(&y), reflect.ValueOf(x))7	fmt.Println("After Copying")8	fmt.Println("x=", x)9	fmt.Println("y=", y)10}11The CopyValue method is available in reflect package. The package is imported in the above code

CopyValue

Using AI Code Generation

1import (2func main() {3    v = dark.CopyValue(42)4    fmt.Println(v)5}6v := dark.CopyValue(42)7w := dark.CopyValue(1.5)8r := dark.Call("add", v, w)9fmt.Println(r)10v := dark.CopyValue(42)11w := dark.CopyValue(1.5)12r := dark.Call("add", v, w)13fmt.Println(r)14v = dark.CopyValue(42)15x := v.Int()16fmt.Println(x)17v := dark.CopyValue(42)18x := v.Int()19fmt.Println(x)20v := dark.CopyValue(42)21w := dark.CopyValue(1.5)22r := dark.Call("add", v, w)23fmt.Println(r)24v = dark.CopyValue(42)25x := v.Int()26fmt.Println(x)27v := dark.CopyValue(42)28x := v.Int()29fmt.Println(x)30v := dark.CopyValue(42)31w := dark.CopyValue(1.5)32r := dark.Call("add", v, w)33fmt.Println(r)

CopyValue

Using AI Code Generation

1import (2func main() {3	d := dark.New()4	v := d.NewValue()5	v.SetInt64(5)6	v2 := v.CopyValue()7	fmt.Println(v2.GetInt())8}9import (10func main() {11	d := dark.New()12	v := d.NewValue()13	v.SetInt64(5)14	v2 := v.CopyValue()15	v2.SetInt64(6)16	fmt.Println(v.GetInt())17	fmt.Println(v2.GetInt())18}

CopyValue

Using AI Code Generation

1import (2func main() {3 fmt.Println("Hello World!")4 var c = dark.CopyValue(a, b)5 fmt.Println(c)6}

CopyValue

Using AI Code Generation

1import (2type Dark struct {3}4func (d *Dark) CopyValue() {5	fmt.Println("CopyValue")6}7func main() {8	d := &Dark{}9	v := reflect.ValueOf(d)10	v.MethodByName("CopyValue").Call(nil)11}

CopyValue

Using AI Code Generation

1import (2func main() {3    fmt.Println(dark.CopyValue("Hello World"))4}5Example 3: ConvertStringToBase64String() method6import (7func main() {8    fmt.Println(dark.ConvertStringToBase64String("Hello World"))9}10Example 4: ConvertBase64StringToString() method11import (12func main() {13    fmt.Println(dark.ConvertBase64StringToString("SGVsbG8gV29ybGQ="))14}15Example 5: ConvertStringToBinaryString() method16import (17func main() {18    fmt.Println(dark.ConvertStringToBinaryString("Hello World"))19}20Example 6: ConvertBinaryStringToString() method21import (22func main() {23    fmt.Println(dark.ConvertBinaryStringToString("010010000110010101101100011011000110111100100000011101110110111101110010

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