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不知道为什么下面的自定义断言不起作用，这似乎是一个编译错误，但我使用的语法似乎符合他们 wiki 页面中解释的内容：https ://github.com/smartystreets/goconvey/wiki/Custom-断言

我基本上想断言time.Time结构中的一个字段代表过去 24 小时内的一个日期。

// func shouldBeInTheLast24Hours(targetDate time.Time, foo time.Time) string {
func shouldBeInTheLast24Hours(targetDate time.Time) string {
    if targetDate.Before(time.Now().Add(time.Duration(-24) * time.Hour)) {
        return ""
    } else {
        return "The target date is assumed to be in the last 24 hours, go *THERE* and fix stuff"
    }
}

type DateStuff struct {
    VipDate time.Time
}

func TestDateStuff(t *testing.T) {
    Convey("Given date stuff", t, func() {
        Convey("should verify some custom assertions are working", func() {
            myDateStruct := &DateStuff{VipDate: time.Now()}

            // So(myDateStruct.VipDate, shouldBeInTheLast24Hours, nil) // this throws "cannot use shouldBeInTheLast24Hours (type func(time.Time, time.Time) string) as type convey.assertion in argument to convey.So"
            So(myDateStruct.VipDate, shouldBeInTheLast24Hours) // this throws "cannot use shouldBeInTheLast24Hours (type func(time.Time) string) as type convey.assertion in argument to convey.So"
        })
    })
}

在检查我正在使用的 Go Convey 版本时，我看到：

$ cd $GOPATH/src/github.com/smartystreets/goconvey/ && git log -n 1 | grep Date
Date:   Fri Aug 25 16:14:26 2017 -0600

这是在 wiki 页面上的日期（2013 年 11 月 15 日）之后，所以它不应该是更新我的$GOPATH.

我对这种闭包语法不太熟悉，但在我看来我并没有滥用它，但是我看到了编译错误，所以我一定错过了一些陷阱。

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1 回答 1

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这是我编写自定义断言的方式：

func shouldBeInTheLast24Hours(actual interface{}, _ ...interface{}) string {
    providedDate := actual.(time.Time)
    theshold := time.Now().Add(time.Hour * -24)
    if providedDate.After(theshold) {
        return ""
    } else {
        return "The target date is assumed to be in the last 24 hours, go *THERE* and fix stuff"
    }
}

func TestDateStuff(t *testing.T) {
    Convey("Given date stuff", t, func() {
        Convey("should verify some custom assertions are working", func() {
            vipDate := time.Now()
            So(vipDate, shouldBeInTheLast24Hours)
        })
    })
}

自定义断言的函数签名必须匹配assertionfunc 类型：

// assertion is an alias for a function with a signature that the convey.So()
// method can handle. Any future or custom assertions should conform to this
// method signature. The return value should be an empty string if the assertion
// passes and a well-formed failure message if not.
type assertion func(actual interface{}, expected ...interface{}) string

但是，正如评论中所述，已经定义了一个断言可以满足您的需求：

So(vipDate, ShouldHappenWithin, time.Hour*24, time.Now())
于 2018-07-27T19:20:15.493 回答