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How to use Isa method of td Package

Best Go-testdeep code snippet using td.Isa

td_isa_test.go

Source:td_isa_test.go

...10	"testing"11	"github.com/maxatome/go-testdeep/internal/test"12	"github.com/maxatome/go-testdeep/td"13)14func TestIsa(t *testing.T) {15	gotStruct := MyStruct{16		MyStructMid: MyStructMid{17			MyStructBase: MyStructBase{18				ValBool: true,19			},20			ValStr: "foobar",21		},22		ValInt: 123,23	}24	checkOK(t, &gotStruct, td.Isa(&MyStruct{}))25	checkOK(t, (*MyStruct)(nil), td.Isa(&MyStruct{}))26	checkOK(t, (*MyStruct)(nil), td.Isa((*MyStruct)(nil)))27	checkOK(t, gotStruct, td.Isa(MyStruct{}))28	checkOK(t, bytes.NewBufferString("foobar"),29		td.Isa((*fmt.Stringer)(nil)),30		"checks bytes.NewBufferString() implements fmt.Stringer")31	// does bytes.NewBufferString("foobar") implements fmt.Stringer?32	checkOK(t, bytes.NewBufferString("foobar"), td.Isa((*fmt.Stringer)(nil)))33	checkError(t, &gotStruct, td.Isa(&MyStructBase{}),34		expectedError{35			Message:  mustBe("type mismatch"),36			Path:     mustBe("DATA"),37			Got:      mustContain("*td_test.MyStruct"),38			Expected: mustContain("*td_test.MyStructBase"),39		})40	checkError(t, (*MyStruct)(nil), td.Isa(&MyStructBase{}),41		expectedError{42			Message:  mustBe("type mismatch"),43			Path:     mustBe("DATA"),44			Got:      mustContain("*td_test.MyStruct"),45			Expected: mustContain("*td_test.MyStructBase"),46		})47	checkError(t, gotStruct, td.Isa(&MyStruct{}),48		expectedError{49			Message:  mustBe("type mismatch"),50			Path:     mustBe("DATA"),51			Got:      mustContain("td_test.MyStruct"),52			Expected: mustContain("*td_test.MyStruct"),53		})54	checkError(t, &gotStruct, td.Isa(MyStruct{}),55		expectedError{56			Message:  mustBe("type mismatch"),57			Path:     mustBe("DATA"),58			Got:      mustContain("*td_test.MyStruct"),59			Expected: mustContain("td_test.MyStruct"),60		})61	gotSlice := []int{1, 2, 3}62	checkOK(t, gotSlice, td.Isa([]int{}))63	checkOK(t, &gotSlice, td.Isa(((*[]int)(nil))))64	checkError(t, &gotSlice, td.Isa([]int{}),65		expectedError{66			Message:  mustBe("type mismatch"),67			Path:     mustBe("DATA"),68			Got:      mustContain("*[]int"),69			Expected: mustContain("[]int"),70		})71	checkError(t, gotSlice, td.Isa((*[]int)(nil)),72		expectedError{73			Message:  mustBe("type mismatch"),74			Path:     mustBe("DATA"),75			Got:      mustContain("[]int"),76			Expected: mustContain("*[]int"),77		})78	checkError(t, gotSlice, td.Isa([1]int{2}),79		expectedError{80			Message:  mustBe("type mismatch"),81			Path:     mustBe("DATA"),82			Got:      mustContain("[]int"),83			Expected: mustContain("[1]int"),84		})85	//86	// Bad usage87	checkError(t, "never tested",88		td.Isa(nil),89		expectedError{90			Message: mustBe("bad usage of Isa operator"),91			Path:    mustBe("DATA"),92			Summary: mustBe("Isa(nil) is not allowed. To check an interface, try Isa((*fmt.Stringer)(nil)), for fmt.Stringer for example"),93		})94	//95	// String96	test.EqualStr(t, td.Isa((*MyStruct)(nil)).String(),97		"*td_test.MyStruct")98	// Erroneous op99	test.EqualStr(t, td.Isa(nil).String(), "Isa(<ERROR>)")100}101func TestIsaTypeBehind(t *testing.T) {102	equalTypes(t, td.Isa(([]int)(nil)), []int{})103	equalTypes(t, td.Isa((*fmt.Stringer)(nil)), (*fmt.Stringer)(nil))104	// Erroneous op105	equalTypes(t, td.Isa(nil), nil)106}...

td_isa.go

Source:td_isa.go

...7import (8	"reflect"9	"github.com/maxatome/go-testdeep/internal/ctxerr"10)11type tdIsa struct {12	tdExpectedType13	checkImplement bool14}15var _ TestDeep = &tdIsa{}16// summary(Isa): checks the data type or whether data implements an17// interface or not18// input(Isa): bool,str,int,float,cplx,array,slice,map,struct,ptr,chan,func19// Isa operator checks the data type or whether data implements an20// interface or not.21//22// Typical type checks:23//24//	td.Cmp(t, time.Now(), td.Isa(time.Time{}))  // succeeds25//	td.Cmp(t, time.Now(), td.Isa(&time.Time{})) // fails, as not a *time.Time26//	td.Cmp(t, got, td.Isa(map[string]time.Time{}))27//28// For interfaces, it is a bit more complicated, as:29//30//	fmt.Stringer(nil)31//32// is not an interface, but just nilâ¦ To bypass this golang33// limitation, Isa accepts pointers on interfaces. So checking that34// data implements [fmt.Stringer] interface should be written as:35//36//	td.Cmp(t, bytes.Buffer{}, td.Isa((*fmt.Stringer)(nil))) // succeeds37//38// Of course, in the latter case, if checked data type is39// [*fmt.Stringer], Isa will match too (in fact before checking whether40// it implements [fmt.Stringer] or not).41//42// TypeBehind method returns the [reflect.Type] of model.43func Isa(model any) TestDeep {44	modelType := reflect.TypeOf(model)45	i := tdIsa{46		tdExpectedType: tdExpectedType{47			base:         newBase(3),48			expectedType: modelType,49		},50	}51	if modelType == nil {52		i.err = ctxerr.OpBad("Isa", "Isa(nil) is not allowed. To check an interface, try Isa((*fmt.Stringer)(nil)), for fmt.Stringer for example")53		return &i54	}55	i.checkImplement = modelType.Kind() == reflect.Ptr &&56		modelType.Elem().Kind() == reflect.Interface57	return &i58}59func (i *tdIsa) Match(ctx ctxerr.Context, got reflect.Value) *ctxerr.Error {60	if i.err != nil {61		return ctx.CollectError(i.err)62	}63	gotType := got.Type()64	if gotType == i.expectedType {65		return nil66	}67	if i.checkImplement {68		if gotType.Implements(i.expectedType.Elem()) {69			return nil70		}71	}72	if ctx.BooleanError {73		return ctxerr.BooleanError74	}75	return ctx.CollectError(i.errorTypeMismatch(gotType))76}77func (i *tdIsa) String() string {78	if i.err != nil {79		return i.stringError()80	}81	return i.expectedType.String()82}...

td_any_test.go

Source:td_any_test.go

...50	equalTypes(t,51		td.Any(52			td.Empty(),53			5,54			td.Isa((*error)(nil)), // interface type (in fact pointer to ...)55			td.Any(6, 7),56			td.Isa((*fmt.Stringer)(nil)), // interface type57			8),58		42)59	// Only one interface type60	equalTypes(t,61		td.Any(62			td.Isa((*error)(nil)),63			td.Isa((*error)(nil)),64			td.Isa((*error)(nil)),65		),66		(*error)(nil))67	// Several interface types, cannot be sure68	equalTypes(t,69		td.Any(70			td.Isa((*error)(nil)),71			td.Isa((*fmt.Stringer)(nil)),72		),73		nil)74	equalTypes(t,75		td.Any(76			td.Code(func(x any) bool { return true }),77			td.Code(func(y int) bool { return true }),78		),79		12)80}...

Isa

Using AI Code Generation

1import (2type T struct {3}4func main() {5    t := T{23, "skidoo"}6    s := reflect.ValueOf(&t).Elem()7    typeOfT := s.Type()8    for i := 0; i < s.NumField(); i++ {9        f := s.Field(i)10        fmt.Printf("%d: %s %s = %v11            typeOfT.Field(i).Name, f.Type(), f.Interface())12    }13    s.Field(0).SetInt(77)14    s.Field(1).SetString("Sunset Strip")15    fmt.Println("t is now", t)16}17import (18type T struct {19}20func main() {21    fmt.Println("type:", reflect.TypeOf(x))22    v := reflect.ValueOf(x)23    fmt.Println("value:", v)24    fmt.Println("kind is float64:", v.Kind() == reflect.Float64)25    fmt.Println("value:", v.Float())26    fmt.Println(v.Interface())27    fmt.Printf("value is %5.2e28", v.Interface())29    y := v.Interface().(float64)30    fmt.Println(y)31}32import (33type T struct {34}35func main() {36    fmt.Println("type:", reflect.TypeOf(x))37    v := reflect.ValueOf(x)38    fmt.Println("settability of v:", v.CanSet())39    v = reflect.ValueOf(&x)40    fmt.Println("type of v:", v.Type())41    fmt.Println("settability of v:", v.CanSet())42    v = v.Elem()43    fmt.Println("The Elem of v is:", v)44    fmt.Println("settability of v:", v.CanSet())45    v.SetFloat(7.1)46    fmt.Println(v.Interface())47    fmt.Println(v)48}

Isa

Using AI Code Generation

1import (2type td interface {3	Isa() string4}5type t1 struct {6}7type t2 struct {8}9func (t t1) Isa() string {10}11func (t t2) Isa() string {12}13func main() {14	a = t1{}15	b = t2{}16	fmt.Println(a.Isa())17	fmt.Println(b.Isa())18}19import (20type td interface {21	Isa() string22}23type t1 struct {24}25type t2 struct {26}27func (t t1) Isa() string {28}29func (t t2) Isa() string {30}31func main() {32	a = t1{}33	switch a.(type) {34		fmt.Println("t1")35		fmt.Println("t2")36	}37}38import (39type td interface {40	Isa() string41}42type t1 struct {43}44type t2 struct {45}46func (t t1) Isa() string {47}48func (t t2) Isa() string {49}50func main() {51	a = t1{}52	switch a.(type) {53		fmt.Println("t1")54		fmt.Println("t2")55	}56}57import (58type td interface {59	Isa() string60}61type t1 struct {62}63type t2 struct {64}65func (t t1) Isa() string {66}67func (t t2) Isa() string {68}69func main() {70	a = t1{}71	switch a.(type) {72		fmt.Println("t1")73		fmt.Println("t2")74	}75}76import (77type td interface {

Isa

Using AI Code Generation

1import "fmt"2type td struct {3}4func main() {5    fmt.Println(x)6    fmt.Println(x.Isa(x.a))7    fmt.Println(x.Isa(x.b))8    fmt.Println(x.Isa(x.c))9}10import "fmt"11type td struct {12}13func (t td) Isa(v interface{}) bool {14    switch v.(type) {15    }16}17func main() {18    fmt.Println(x)19    fmt.Println(x.Isa(x.a))20    fmt.Println(x.Isa(x.b))21    fmt.Println(x.Isa(x.c))22}23{10 3.14 hello}24import "fmt"25type td struct {26}27func main() {28    fmt.Println(x)29    fmt.Println(x.Isa(&x.a))30    fmt.Println(x.Isa(&x.b))31    fmt.Println(x.Isa(&x.c))32}33import "fmt"34type td struct {35}36func (t *

Isa

Using AI Code Generation

1import "fmt"2type td struct {3}4func (t td) Isa() {5    fmt.Println("This is a method of td class")6}7func main() {8    t.Isa()9}10import "fmt"11type td struct {12}13func (t *td) Isa() {14    fmt.Println("This is a method of td class")15}16func main() {17    t.Isa()18}19import "fmt"20type td struct {21}22func (t td) Isa() {23    fmt.Println("This is a method of td class")24}25func main() {26    t.Isa()27    t1.Isa()28}29import "fmt"30type td struct {31}32func (t *td) Isa() {33    fmt.Println("This is a method of td class")34}35func main() {36    t.Isa()37    t1.Isa()38}

Isa

Using AI Code Generation

1import (2type td struct {3}4func (t td) String() string {5return fmt.Sprintf("%d %s", t.A, t.B)6}7func main() {8t := td{1, "hello"}9fmt.Println(reflect.TypeOf(t).String())10fmt.Println(reflect.TypeOf(t).Name())11fmt.Println(reflect.TypeOf(t).Kind())12fmt.Println(reflect.TypeOf(t).PkgPath())13fmt.Println(reflect.TypeOf(t).NumMethod())14fmt.Println(reflect.TypeOf(t).Method(0))15fmt.Println(reflect.TypeOf(t).MethodByName("String"))16}17{String  func(main.td) string 0 [0] false}18{String  func(main.td) string 0 [0] false}

Isa

Using AI Code Generation

1import (2func main() {3	fmt.Println(reflect.TypeOf(a).Kind() == reflect.Int)4	fmt.Println(reflect.TypeOf(b).Kind() == reflect.Float64)5	fmt.Println(reflect.TypeOf(c).Kind() == reflect.String)6	fmt.Println(reflect.TypeOf(d).Kind() == reflect.Int64)7	fmt.Println(reflect.TypeOf(e).Kind() == reflect.Int32)8	fmt.Println(reflect.TypeOf(f).Kind() == reflect.Float32)9}

Isa

Using AI Code Generation

1import (2type td struct {3}4func (t td) Isa() {5	fmt.Println("Isa")6}7func main() {8	t.Isa()9}10import (11type td struct {12}13func (t td) Isa() {14	fmt.Println("Isa")15}16type tdd struct {17}18func (t tdd) Isa() {19	fmt.Println("Isa in tdd")20}21func main() {22	t.Isa()23	t1.Isa()24}25import (26type td struct {27}28func (t td) Isa() {29	fmt.Println("Isa")30}31func (t td) Isa1(i int) {32	fmt.Println("Isa1", i)33}34func (t td) Isa2(i int, j int) {35	fmt.Println("Isa2", i, j)36}37func main() {38	t.Isa()39	t.Isa1(1)40	t.Isa2(1, 2)41}

Isa

Using AI Code Generation

1import (2type td struct {3}4func (t *td) Isa() {5    fmt.Println("I am a method of td")6}7func main() {8    t.Isa()9    fmt.Println(t.name)10    for i := range iter.N(10) {11        fmt.Println(i)12    }13}14import (15type td struct {16}17func (t *td) Isa() {18    fmt.Println("I am a method of td")19}20func main() {21    t.Isa()22    fmt.Println(t.name)23    for i := range iter.N(10) {24        fmt.Println(i)25    }26}27import (28type td struct {29}30func (t *td) Isa() {31    fmt.Println("I am a method of td")32}33func main() {34    t.Isa()35    fmt.Println(t.name)36    for i := range iter.N(10) {37        fmt.Println(i)38    }39}40import (41type td struct {42}43func (t *td) Isa() {44    fmt.Println("I am a method of td")45}46func main() {47    t.Isa()48    fmt.Println(t.name)49    for i := range iter.N(10) {50        fmt.Println(i)51    }52}

Isa

Using AI Code Generation

1import (2func main() {3	fmt.Println(td1.Isa(&td))4}5import (6func main() {7	fmt.Println(td1.Isa(&td))8}9import (10func main() {11	fmt.Println(td1.Isa(&td))12}13import (14func main() {15	fmt.Println(td1.Isa(&td))16}17import (18func main() {19	fmt.Println(td1.Isa(&td))20}21import (22func main() {23	fmt.Println(td1.Isa(&td))24}25import (26func main() {27	fmt.Println(td1.Isa(&td))28}29import (30func main() {31	fmt.Println(td1.Isa(&td))32}33import (34func main() {35	fmt.Println(td1.Isa(&td))36}37import (38func main()

Isa

Using AI Code Generation

1import (2type td struct {3}4func (t td) Isa() {5 fmt.Println("td class")6}7func main() {8 t.Isa()9}

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