What is the best way to mock carbon in unit testing?

[matt9mg]

Hi,

I'm wondering what the best way to mock carbon as I cannot see an interface to aid with testing a custom service.

Thanks,

[gouguoyin]

https://github.com/golang-module/carbon#testing

[matt9mg]

oh nice thank you, I have a separate question say I was to inject carbon into a service struct i.e.

func main() {
  lang := carbon.NewLanguage()
  lang.SetResources(map[string]string{
  "before": "Expires in %s",
  "after":  "Expired %s ago",
  })
  
  c := carbon.SetLanguage(lang)

  ms := services.NewMyService(&c)
  diff := ms.FromNowHumanReadable(...)
}

type MysServiceInterface interface {
   FromNowHumanReadable(date time.time) string
}

type MyService struct {
   c *carbon.Carbon
}

func NewMyService(c *carbon.Carbon) MysServiceInterface {
   return &MyService{
      c: c,
   }
}

func (d *Date) FromNowHumanReadable(date time.Time) string {
	endDate := d.carbon.CreateFromTimestamp(date.Unix())

	return d.carbon.Now().DiffForHumans(endDate)
}

In this scenario, i have a wrapper helper to always get the diff from now, how do I mock carbon in a case where I have a single language which will save having to append the language string each call.

[gouguoyin]

Language locale must be set when rewriting some translation resources，if rewriting all resources, it is not necessary.

lang := carbon.NewLanguage()
lang.SetLocale("en")
lang.SetResources(map[string]string{
    "before": "Expires in %s",
    "after":  "Expired %s ago",
})

[matt9mg]

I appreciate what you are saying here 👍

[Issues-translate-bot]

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---

I appreciate what you are saying here 👍

[fikurimax]

I am testing a web service and trying to mock the time using .SetTestNow() but in the handler/controller the time is not mocked

[gouguoyin]

I am testing a web service and trying to mock the time using .SetTestNow() but in the handler/controller the time is not mocked

Show sample code.

[fikurimax]

The handler lives in different package than the test file

[gouguoyin]

The handler lives in different package than the test file

Carbon is not a pointer, so after SetTestNow, the value of carbon cannot be changed.

[gouguoyin]

c := carbon.SetTimezone(carbon.UTC)

c.Now().ToDateString() // 2023-12-27
c.IsSetTestNow() // false

c.SetTestNow(carbon.Parse("2020-08-05"))
c.Now().ToDateString() // 2020-08-05
c.Now().IsSetTestNow() // true

c.UnSetTestNow()
c.Now().ToDateString() // 2023-12-2
c.Now().IsSetTestNow() // false

[fikurimax]

I thought we could do globally without creating an object like

carbon.SetTestNow(carbon.Parse("2020-12-12"))

And wherever i called

carbon.Now()

It'll give 2020-12-12