routine/api_cloneable_test.go at main · timandy/routine · GitHub

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package routine

import (

"testing"

"github.com/stretchr/testify/assert"

)

func TestCloneable(t *testing.T) {

//struct can not be cast to interface

var value any = personCloneable{Id: 1, Name: "Hello"}

_, ok := value.(Cloneable)

assert.False(t, ok)

//pointer can be cast to interface

var pointer any = &personCloneable{Id: 1, Name: "Hello"}

_, ok2 := pointer.(Cloneable)

assert.True(t, ok2)

//nil pointer can be cast to interface

pointer = (*personCloneable)(nil)

cloneable, ok3 := pointer.(Cloneable)

assert.True(t, ok3)

assert.True(t, cloneable != nil)

}

func TestCloneable_Clone(t *testing.T) {

//clone struct

pc := &personCloneable{Id: 1, Name: "Hello"}

assert.NotSame(t, pc, pc.Clone())

assert.Equal(t, *pc, *(pc.Clone().(*personCloneable)))

//copy pointer

pcs := make([]*personCloneable, 1)

pcs[0] = pc

pcs2 := make([]*personCloneable, 1)

copy(pcs2, pcs)

assert.Same(t, pc, pcs2[0])

//clone nil panic

assert.Panics(t, func() {

pc2 := (*personCloneable)(nil)

_ = pc2.Clone()

})

}

type personCloneable struct {

Id int

Name string

}

func (p *personCloneable) Clone() any {

return &personCloneable{Id: p.Id, Name: p.Name}

}

routine/api_cloneable_test.go at main · timandy/routine · GitHub

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