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How to use AddCmpHooks method of hooks Package

Best Go-testdeep code snippet using hooks.AddCmpHooks

hooks_test.go

Source:hooks_test.go

...14	"time"15	"github.com/maxatome/go-testdeep/internal/hooks"16	"github.com/maxatome/go-testdeep/internal/test"17)18func TestAddCmpHooks(t *testing.T) {19	for _, tst := range []struct {20		name string21		cmp  any22		err  string23	}{24		{25			name: "not a function",26			cmp:  "zip",27			err:  "expects a function, not a string (@1)",28		},29		{30			name: "no variadic",31			cmp:  func(a []byte, b ...byte) bool { return true },32			err:  "expects: func (T, T) bool|error not func([]uint8, ...uint8) bool (@1)",33		},34		{35			name: "in",36			cmp:  func(a, b, c int) bool { return true },37			err:  "expects: func (T, T) bool|error not func(int, int, int) bool (@1)",38		},39		{40			name: "out",41			cmp:  func(a, b int) {},42			err:  "expects: func (T, T) bool|error not func(int, int) (@1)",43		},44		{45			name: "type mismatch",46			cmp:  func(a int, b bool) bool { return true },47			err:  "expects: func (T, T) bool|error not func(int, bool) bool (@1)",48		},49		{50			name: "interface",51			cmp:  func(a, b any) bool { return true },52			err:  "expects: func (T, T) bool|error not func(interface {}, interface {}) bool (@1)",53		},54		{55			name: "bad return",56			cmp:  func(a, b int) int { return 0 },57			err:  "expects: func (T, T) bool|error not func(int, int) int (@1)",58		},59	} {60		i := hooks.NewInfo()61		err := i.AddCmpHooks([]any{62			func(a, b bool) bool { return true },63			tst.cmp,64		})65		if test.Error(t, err, tst.name) {66			if !strings.Contains(err.Error(), tst.err) {67				t.Errorf("<%s> does not contain <%s> for %s", err, tst.err, tst.name)68			}69		}70	}71}72func TestCmp(t *testing.T) {73	t.Run("bool", func(t *testing.T) {74		var i *hooks.Info75		handled, err := i.Cmp(reflect.ValueOf(12), reflect.ValueOf(12))76		test.NoError(t, err)77		test.IsFalse(t, handled)78		i = hooks.NewInfo()79		err = i.AddCmpHooks([]any{func(a, b int) bool { return a == b }})80		test.NoError(t, err)81		handled, err = i.Cmp(reflect.ValueOf(12), reflect.ValueOf(12))82		test.NoError(t, err)83		test.IsTrue(t, handled)84		handled, err = i.Cmp(reflect.ValueOf(12), reflect.ValueOf(34))85		if err != hooks.ErrBoolean {86			test.EqualErrorMessage(t, err, hooks.ErrBoolean)87		}88		test.IsTrue(t, handled)89		handled, err = i.Cmp(reflect.ValueOf(12), reflect.ValueOf("twelve"))90		test.NoError(t, err)91		test.IsFalse(t, handled)92		handled, err = i.Cmp(reflect.ValueOf("twelve"), reflect.ValueOf("twelve"))93		test.NoError(t, err)94		test.IsFalse(t, handled)95		handled, err = (*hooks.Info)(nil).Cmp(reflect.ValueOf(1), reflect.ValueOf(2))96		test.NoError(t, err)97		test.IsFalse(t, handled)98	})99	t.Run("error", func(t *testing.T) {100		i := hooks.NewInfo()101		diffErr := errors.New("aâ b")102		err := i.AddCmpHooks([]any{103			func(a, b int) error {104				if a == b {105					return nil106				}107				return diffErr108			},109		})110		test.NoError(t, err)111		handled, err := i.Cmp(reflect.ValueOf(12), reflect.ValueOf(12))112		test.NoError(t, err)113		test.IsTrue(t, handled)114		handled, err = i.Cmp(reflect.ValueOf(12), reflect.ValueOf(34))115		if err != diffErr {116			test.EqualErrorMessage(t, err, diffErr)...

hooks.go

Source:hooks.go

...46		ni.props[t] = p47	}48	return ni49}50// AddCmpHooks records new Cmp hooks using functions contained in fns.51//52// Each function in fns has to be a function with the following53// possible signatures:54//55//	func (got A, expected A) bool56//	func (got A, expected A) error57//58// First arg is always âgotâ, and second is always âexpectedâ.59//60// A cannot be an interface. This retriction can be removed in the61// future, if really needed.62//63// It returns an error if an item of fns is not a function or if its64// signature does not match the expected ones.65func (i *Info) AddCmpHooks(fns []any) error {66	for n, fn := range fns {67		vfn := reflect.ValueOf(fn)68		if vfn.Kind() != reflect.Func {69			return fmt.Errorf("expects a function, not a %s (@%d)", vfn.Kind(), n)70		}71		ft := vfn.Type()72		if !ft.IsVariadic() &&73			ft.NumIn() == 2 &&74			ft.NumOut() == 1 &&75			ft.In(0) == ft.In(1) &&76			ft.In(0).Kind() != reflect.Interface &&77			(ft.Out(0) == types.Bool || ft.Out(0) == types.Error) {78			i.Lock()79			prop := i.props[ft.In(0)]...

t_hooks.go

Source:t_hooks.go

...77//78// [UseEqual]: https://pkg.go.dev/github.com/maxatome/go-testdeep/td#ContextConfig.UseEqual79func (t *T) WithCmpHooks(fns ...any) *T {80	t = t.copyWithHooks()81	err := t.Config.hooks.AddCmpHooks(fns)82	if err != nil {83		t.Helper()84		t.Fatal(color.Bad("WithCmpHooks " + err.Error()))85	}86	return t87}88// WithSmuggleHooks returns a new [*T] instance with new Smuggle hooks89// recorded using functions passed in fns.90//91// Each function in fns has to be a function with the following92// possible signatures:93//94//	func (got A) B95//	func (got A) (B, error)...

AddCmpHooks

Using AI Code Generation

1import (2type Person struct {3}4func (p ByName) Len() int           { return len(p) }5func (p ByName) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }6func (p ByName) Less(i, j int) bool { return p[i].Name < p[j].Name }7func main() {8	people := []Person{9		{"Zeno", 30},10		{"John", 20},11		{"Al", 40},12	}13	sort.Sort(ByName(people))14	fmt.Println(people)15}16[{{Al 40} {John 20} {Zeno 30}}]17import (18type Person struct {19}20func (p ByName) Len() int           { return len(p) }21func (p ByName) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }22func (p ByName) Less(i, j int) bool { return p[i].Name < p[j].Name }23func main() {24	people := []Person{25		{"Zeno", 30},26		{"John", 20},27		{"Al", 40},28	}29	sort.Sort(ByName(people))30	fmt.Println(people)31}32[{{Al 40} {John 20} {Zeno 30}}]33import (34type Person struct {35}36func (p ByName) Len() int           { return len(p) }37func (p ByName) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }38func (p ByName) Less(i, j int) bool { return p[i].Name < p[j].Name }39func main() {40	people := []Person{41		{"Zeno",

AddCmpHooks

Using AI Code Generation

1import (2func main() {3    xlsx := xlsx.NewFile()4    sheet, err := xlsx.AddSheet("Sheet1")5    if err != nil {6        fmt.Printf(err.Error())7    }8    row := sheet.AddRow()9    cell := row.AddCell()10    cell = row.AddCell()11    err = xlsx.AddCmpHooks()12    if err != nil {13        fmt.Printf(err.Error())14    }15    err = xlsx.Save("2.xlsx")16    if err != nil {17        fmt.Printf(err.Error())18    }19}20import (21func main() {22    xlsx := xlsx.NewFile()23    sheet, err := xlsx.AddSheet("Sheet1")24    if err != nil {25        fmt.Printf(err.Error())26    }27    row := sheet.AddRow()28    cell := row.AddCell()29    cell = row.AddCell()30    err = xlsx.AddCmpHooks()31    if err != nil {32        fmt.Printf(err.Error())33    }34    err = xlsx.Save("3.xlsx")35    if err != nil {36        fmt.Printf(err.Error())37    }38}39import (40func main() {41    xlsx := xlsx.NewFile()42    sheet, err := xlsx.AddSheet("Sheet1")43    if err != nil {44        fmt.Printf(err.Error())45    }46    row := sheet.AddRow()47    cell := row.AddCell()48    cell = row.AddCell()49    err = xlsx.AddCmpHooks()50    if err != nil {51        fmt.Printf(err.Error())52    }53    err = xlsx.Save("4.xlsx")54    if err != nil {55        fmt.Printf(err.Error())56    }57}

AddCmpHooks

Using AI Code Generation

1import (2func main() {3	golhooks.AddCmpHooks("1.go")4	fmt.Println(golenv.Get("GOPATH"))5}6import (7func main() {8	golhooks.AddHook("1.go", "1.go")9	fmt.Println(golenv.Get("GOPATH"))10}11import (12func main() {13	golhooks.AddHook("1.go", "2.go")14	fmt.Println(golenv.Get("GOPATH"))15}16import (17func main() {18	golhooks.AddHook("1.go", "3.go")19	fmt.Println(golenv.Get("GOPATH"))20}21import (22func main() {23	golhooks.AddHook("2.go", "1.go")24	fmt.Println(golenv.Get("GOPATH"))25}26import (27func main() {28	golhooks.AddHook("2.go", "2.go")29	fmt.Println(golenv.Get("GOPATH"))30}

AddCmpHooks

Using AI Code Generation

1import (2func main() {3	h := hooks.Hooks{}4	h.AddCmpHooks("Pre", "Pre1")5	h.AddCmpHooks("Pre", "Pre2")6	h.AddCmpHooks("Pre", "Pre3")7	h.AddCmpHooks("Post", "Post1")8	h.AddCmpHooks("Post", "Post2")9	h.AddCmpHooks("Post", "Post3")10	fmt.Println(h)11}

AddCmpHooks

Using AI Code Generation

1import (2func main() {3	hooks.AddCmpHooks(reflect.TypeOf(time.Time{}), func(a, b reflect.Value, depth int) (bool, bool) {4		if a.Interface().(time.Time).Equal(b.Interface().(time.Time)) {5		}6	})7	fmt.Printf("%# v", pretty.Formatter(time.Now()))8}9import (10func main() {11	hooks.AddCmpHooks(reflect.TypeOf(time.Time{}), func(a, b reflect.Value, depth int) (bool, bool) {12		if a.Interface().(time.Time).Equal(b.Interface().(time.Time)) {13		}14	})15	fmt.Printf("%# v", pretty.Formatter(time.Now()))16}17import (18func main() {19	hooks.AddCmpHooks(reflect.TypeOf(time.Time{}), func(a, b reflect.Value, depth int) (bool, bool) {20		if a.Interface().(time.Time).Equal(b.Interface().(time.Time)) {21		}22	})23	fmt.Printf("%# v", pretty.Formatter(time.Now()))24}25import (26func main() {27	hooks.AddCmpHooks(reflect.TypeOf(time.Time{}), func(a, b reflect.Value, depth int) (bool, bool) {28		if a.Interface().(time.Time).Equal(b.Interface().(time.Time)) {29		}30	})31	fmt.Printf("%# v", pretty.Formatter(time.Now()))32}

AddCmpHooks

Using AI Code Generation

1import (2func main() {3	hooks := golhooks.Hooks{}4	hooks.AddCmpHooks("test", "test")5}6import (7func main() {8	hooks := golhooks.Hooks{}9	hooks.AddPkgHooks("test", "test")10}11import (12func main() {13	hooks := golhooks.Hooks{}14	hooks.AddPkgHooks("test", "test", true)15}16import (17func main() {18	hooks := golhooks.Hooks{}19	hooks.AddPkgHooks("test", "test", true, "custom")20}21import (22func main() {23	hooks := golhooks.Hooks{}24	hooks.AddPkgHooks("test", "test", true, "custom", "custom.go")25}26import (27func main() {28	hooks := golhooks.Hooks{}

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