编组和解组时间。时间，获得不同的值

Question

I am try to update my Go code from 1.8 to 1.9. but, i got some problem:

package simple_struct

import (
    "time"
    "encoding/json"
    "github.com/stretchr/testify/assert"
    "testing"
)

type SimpleStruct struct {
    CreateTime time.Time
    Other      string
}

func NewSimpleStruct() *SimpleStruct {
    return &SimpleStruct{
        CreateTime: time.Now(),
    }
}

func Test(t *testing.T) {
    s1 := NewSimpleStruct()
    data, err := json.Marshal(s1)
    assert.Nil(t, err)
    s2 := &SimpleStruct{}
    err = json.Unmarshal(data, s2)
    assert.Nil(t, err)

    assert.Equal(t, s2, s1)
    // this is not equal
    // output:
    /*

    Diff:
    --- Expected
    +++ Actual
    @@ -1,3 +1,3 @@
    (*simple_struct.SimpleStruct)({
        - CreateTime: (time.Time) 2017-12-01 14:54:53.948875421 +0800 CST,
        + CreateTime: (time.Time) 2017-12-01 14:54:53.948875421 +0800 CST m=+0.001827244,
    */
}

It is working in Golang 1.8, but not in Golang 1.9.

I know that Golang 1.9 has update time.Time, but I do not understand this.

Answer 1

Probably to do with monotonic time being wiped by marshalling. See the the package docs