Unlock 30% off on Manual Testing Annual Plans this Holiday Season.

Copied to Clipboard!

How to use IsZero method of types Package

Best Ginkgo code snippet using types.IsZero

required.go

Source:required.go

...18	"time"19	"go.thethings.network/lorawan-stack/pkg/errors"20	"go.thethings.network/lorawan-stack/pkg/types"21)22// IsZeroer is an interface, which reports whether it represents a zero value.23type IsZeroer interface {24	IsZero() bool25}26var isZeroerType = reflect.TypeOf((*IsZeroer)(nil)).Elem()27// isZeroValue is like isZero, but acts on values of reflect.Value type.28func isZeroValue(v reflect.Value) bool {29	iv := reflect.Indirect(v)30	if !iv.IsValid() {31		return true32	}33	if v.Type().Implements(isZeroerType) {34		return v.Interface().(IsZeroer).IsZero()35	}36	if iv.Type().Implements(isZeroerType) {37		return iv.Interface().(IsZeroer).IsZero()38	}39	v = iv40	switch v.Kind() {41	case reflect.Array:42		for i := 0; i < v.Len(); i++ {43			if !isZero(v.Index(i)) {44				return false45			}46		}47		return true48	case reflect.Map, reflect.Slice, reflect.String:49		return v.Len() == 050	case reflect.Bool:51		return !v.Bool()52	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:53		return v.Int() == 054	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:55		return v.Uint() == 056	case reflect.Float32, reflect.Float64:57		return v.Float() == 058	case reflect.Complex64, reflect.Complex128:59		return v.Complex() == 060	case reflect.Chan, reflect.Func, reflect.Interface:61		return v.IsNil()62	case reflect.UnsafePointer:63		return v.Pointer() == 064	case reflect.Struct:65		for i := 0; i < v.NumField(); i++ {66			if !isZeroValue(v.Field(i)) {67				return false68			}69		}70		return true71	}72	return v.Interface() == reflect.Zero(v.Type()).Interface()73}74// isZero reports whether the value is the zero of its type.75func isZero(v interface{}) bool {76	if v == nil {77		return true78	}79	switch v := v.(type) {80	case nil:81		return true82	case bool:83		return !v84	case int:85		return v == 086	case int64:87		return v == 088	case int32:89		return v == 090	case int16:91		return v == 092	case int8:93		return v == 094	case uint:95		return v == 096	case uint64:97		return v == 098	case uint32:99		return v == 0100	case uint16:101		return v == 0102	case uint8:103		return v == 0104	case float64:105		return v == 0106	case float32:107		return v == 0108	case string:109		return v == ""110	case []bool:111		return len(v) == 0112	case []string:113		return len(v) == 0114	case []uint:115		return len(v) == 0116	case []uint64:117		return len(v) == 0118	case []uint32:119		return len(v) == 0120	case []uint16:121		return len(v) == 0122	case []uint8:123		return len(v) == 0124	case []int:125		return len(v) == 0126	case []int64:127		return len(v) == 0128	case []int32:129		return len(v) == 0130	case []int16:131		return len(v) == 0132	case []int8:133		return len(v) == 0134	case []float64:135		return len(v) == 0136	case []float32:137		return len(v) == 0138	case map[string]interface{}:139		return len(v) == 0140	case map[string]string:141		return len(v) == 0142	case *time.Time:143		return v == nil || v.IsZero()144	case time.Time:145		return v.IsZero()146	case *types.AES128Key:147		return v == nil || v.IsZero()148	case types.AES128Key:149		return v.IsZero()150	case *types.EUI64:151		return v == nil || v.IsZero()152	case types.EUI64:153		return v.IsZero()154	case *types.NetID:155		return v == nil || v.IsZero()156	case types.NetID:157		return v.IsZero()158	case *types.DevAddr:159		return v == nil || v.IsZero()160	case types.DevAddr:161		return v.IsZero()162	case *types.DevNonce:163		return v == nil || v.IsZero()164	case types.DevNonce:165		return v.IsZero()166	case *types.JoinNonce:167		return v == nil || v.IsZero()168	case types.JoinNonce:169		return v.IsZero()170	}171	return isZeroValue(reflect.ValueOf(v))172}173var errFieldSet = errors.DefineInvalidArgument("field_set", "field is set")174// Empty returns error if v is set.175// It is meant to be used as the first validator function passed as argument to Field.176// It uses IsZero, if v implements IsZeroer interface.177func Empty(v interface{}) error {178	if !isZero(v) {179		return errFieldSet180	}181	return nil182}183// errZeroValue is a flag value indicating a value is not required. If a value is not set,184// requirements on its value will be ignored.185var errZeroValue = stdliberr.New("Value not set")186// NotRequired returns an error, used internally in Field, if v is zero.187// It is meant to be used as the first validator function passed as argument to Field.188// It uses IsZero, if v implements IsZeroer interface.189func NotRequired(v interface{}) error {190	if isZero(v) {191		return errZeroValue192	}193	return nil194}195// Required returns error if v is empty.196// It is meant to be used as the first validator function passed as argument to Field.197// It uses IsZero, if v implements IsZeroer interface.198func Required(v interface{}) error {199	if isZero(v) {200		return errRequired201	}202	return nil203}...

required_test.go

Source:required_test.go

...26type isZeroer struct {27	isZero bool28}29var izCalled int30func (iz isZeroer) IsZero() bool {31	izCalled++32	return iz.isZero33}34type stringType string35type boolType bool36type int64Type int6437type uint64Type uint6438type float64Type float6439type structType struct {40	field bool41}42var isZeroCases = []struct {43	v      interface{}44	isZero bool45}{46	{nil, true},47	{(interface{})(nil), true},48	{false, true},49	{int(0), true},50	{int64(0), true},51	{int32(0), true},52	{int16(0), true},53	{int8(0), true},54	{uint(0), true},55	{uint64(0), true},56	{uint32(0), true},57	{uint16(0), true},58	{uint8(0), true},59	{float64(0), true},60	{float32(0), true},61	{float32(0), true},62	{"", true},63	{[]bool{}, true},64	{[]int{}, true},65	{[]int64{}, true},66	{[]int32{}, true},67	{[]int16{}, true},68	{[]int8{}, true},69	{[]uint{}, true},70	{[]uint64{}, true},71	{[]uint32{}, true},72	{[]uint16{}, true},73	{[]uint8{}, true},74	{[]float64{}, true},75	{[]float32{}, true},76	{[]float32{}, true},77	{[]string{}, true},78	{(*time.Time)(nil), true},79	{time.Time{}, true},80	{&time.Time{}, true},81	{map[string]interface{}{}, true},82	{map[string]interface{}{"foo": "bar"}, false},83	{map[string]string{}, true},84	{map[string]string{"foo": "bar"}, false},85	{types.AES128Key{}, true},86	{types.EUI64{}, true},87	{types.NetID{}, true},88	{types.DevAddr{}, true},89	{types.DevNonce{}, true},90	{types.JoinNonce{}, true},91	{(*types.AES128Key)(nil), true},92	{(*types.EUI64)(nil), true},93	{(*types.NetID)(nil), true},94	{(*types.DevAddr)(nil), true},95	{(*types.DevNonce)(nil), true},96	{(*types.JoinNonce)(nil), true},97	{isZeroer{isZero: false}, false},98	{isZeroer{isZero: true}, true},99	{(*isZeroer)(nil), true},100	{&isZeroer{isZero: false}, false},101	{&isZeroer{isZero: true}, true},102	{stringType(""), true},103	{stringType("foo"), false},104	{boolType(false), true},105	{boolType(true), false},106	{int64Type(0), true},107	{int64Type(42), false},108	{uint64Type(0), true},109	{uint64Type(42), false},110	{float64Type(0), true},111	{float64Type(42), false},112	{structType{true}, false},113	{structType{false}, true},114	{unsafe.Pointer(nil), true},115	{unsafe.Pointer(&([]byte{42})[0]), false},116}117func TestIsZero(t *testing.T) {118	for i, tc := range isZeroCases {119		t.Run(fmt.Sprintf("%d %T(%v)", i, tc.v, tc.v), func(t *testing.T) {120			assertions.New(t).So(isZero(tc.v), should.Equal, tc.isZero)121		})122	}123	assertions.New(t).So(izCalled, should.Equal, 4)124}125func TestRequired(t *testing.T) {126	a := assertions.New(t)127	a.So(Field("", Required), should.NotBeNil)128	a.So(Field("f", Required), should.BeNil)129	a.So(Field("", NotRequired), should.BeNil)130	a.So(Field("f", NotRequired), should.BeNil)131}132func BenchmarkIsZero(b *testing.B) {133	for i, tc := range isZeroCases {134		b.Run(strconv.Itoa(i), func(b *testing.B) {135			for j := 0; j < b.N; j++ {136				isZero(tc.v)137			}138		})139	}140}141func BenchmarkIsZeroValue(b *testing.B) {142	for i, tc := range isZeroCases {143		b.Run(strconv.Itoa(i), func(b *testing.B) {144			for j := 0; j < b.N; j++ {145				isZeroValue(reflect.ValueOf(tc.v))146			}147		})148	}149}...

IsZero

Using AI Code Generation

1import (2func main() {3 fmt.Println(t.IsZero())4 t = time.Now()5 fmt.Println(t.IsZero())6}

IsZero

Using AI Code Generation

1import (2func main() {3	fmt.Println(i, f, b, s, t)4	fmt.Println(i == 0, f == 0, b == false, s == "", t.IsZero())5}6import (7func main() {8	fmt.Println(t.IsZero())9	fmt.Println(t)10}11import (12func main() {13	t := time.Now()14	fmt.Println(t)15}

IsZero

Using AI Code Generation

1import (2func main() {3	fmt.Println("IsZero:", t.IsZero())4	t = time.Now()5	fmt.Println("IsZero:", t.IsZero())6}7import (8func main() {9	fmt.Println("IsZero:", t.IsZero())10	t = time.Now()11	fmt.Println("IsZero:", t.IsZero())12}13import (14func main() {15	fmt.Println("IsZero:", t.IsZero())16	t = time.Now()17	fmt.Println("IsZero:", t.IsZero())18}19import (20func main() {21	fmt.Println("IsZero:", t.IsZero())22	t = time.Now()23	fmt.Println("IsZero:", t.IsZero())24}25import (26func main() {27	fmt.Println("IsZero:", t.IsZero())28	t = time.Now()29	fmt.Println("IsZero:", t.IsZero())30}31import (32func main() {33	fmt.Println("IsZero:", t.IsZero())34	t = time.Now()35	fmt.Println("IsZero:", t.IsZero())36}37import (38func main() {39	fmt.Println("IsZero:", t.IsZero())40	t = time.Now()

IsZero

Using AI Code Generation

1import (2func main() {3	fmt.Println(t.IsZero())4	t = time.Now()5	fmt.Println(t.IsZero())6}7Time.Unix() Method8func (t Time) Unix() int649import (10func main() {11	fmt.Println(t.Unix())12	t = time.Now()13	fmt.Println(t.Unix())14}15Time.UnixNano() Method16func (t Time) UnixNano() int64

IsZero

Using AI Code Generation

1import (2func main() {3    var g struct{}4    var k func()5    fmt.Println(reflect.ValueOf(a).IsZero())6    fmt.Println(reflect.ValueOf(b).IsZero())7    fmt.Println(reflect.ValueOf(c).IsZero())8    fmt.Println(reflect.ValueOf(d).IsZero())9    fmt.Println(reflect.ValueOf(e).IsZero())10    fmt.Println(reflect.ValueOf(f).IsZero())11    fmt.Println(reflect.ValueOf(g).IsZero())12    fmt.Println(reflect.ValueOf(h).IsZero())13    fmt.Println(reflect.ValueOf(i).IsZero())14    fmt.Println(reflect.ValueOf(j).IsZero())15    fmt.Println(reflect.V

IsZero

Using AI Code Generation

1import (2func main() {3	fmt.Println("Zero value of int is", reflect.ValueOf(i).IsZero())4	fmt.Println("Zero value of float64 is", reflect.ValueOf(f).IsZero())5	fmt.Println("Zero value of bool is", reflect.ValueOf(b).IsZero())6	fmt.Println("Zero value of string is", reflect.ValueOf(s).IsZero())7}

IsZero

Using AI Code Generation

1import (2func main() {3	pkgs, err := packages.Load(&packages.Config{4	}, ".")5	if err != nil {6		log.Fatal(err)7	}8	if packages.PrintErrors(pkgs) > 0 {9		os.Exit(1)10	}11	for _, p := range pkgs {12		if p.Name == "main" {13		}14	}15	if pkg == nil {16		log.Fatalf("could not find package main")17	}18	for _, p := range pkgs {19		if p.TypesInfo != nil {20		}21	}22	if info == nil {23		log.Fatalf("could not find types.Info for package %s", pkg.ID)24	}25	for _, p := range pkgs {26		if p.Types != nil {27		}28	}29	if typesPkg == nil {30		log.Fatalf("could not find types.Package for package %s", pkg.ID)31	}32	scope := typesPkg.Scope()33	if scope == nil {34		log.Fatalf("could not find types.Scope for package %s", pkg.ID)35	}36	for _, name := range scope.Names() {37		obj := scope.Lookup(name)38		if obj == nil {39		}40		if obj.Exported() {41		}42		if obj.Type() == nil {43		}44		if _, ok := obj.Type().Underlying().(*types.Struct); !ok {45		}46		structs = append(structs, obj.Type())47	}

IsZero

Using AI Code Generation

1import (2func main() {3	fmt.Println("IsZero:", reflect.ValueOf(i).IsZero())4	fmt.Println("IsZero:", reflect.ValueOf(s).IsZero())5	fmt.Println("IsZero:", reflect.ValueOf(sl).IsZero())6}7GoLang | reflect.Value Method Set()8GoLang | reflect.Value Method SetString()

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.