我試圖在我的 go 代碼中的測(cè)試中模擬第三方庫(kù)。但我無法編譯我所采取的方法。有什么方法可以使這項(xiàng)工作有效，或者如果我想模擬 的結(jié)果，我可以采取另一種方法T2.M2？package mainimport ( "fmt")// Two types in a library that I dont have control overtype T1 struct {}func (T1) M1() T2 { return T2{}}type T2 struct {}func (T2) M2() { fmt.Println("hello world")}// I created these interfaces in order to assign an instance of T1 // to a variable of type I1 so that I can mock the behavior of T2.M2()// problem is that this doesn't compile.type I1 interface { M1() I2}type I2 interface { M2() // I want to mock this method}// Then I would be able to create a mocktype Mock1 struct {}func (Mock1) M1() I2 { return Mock2{}}type Mock2 struct {}func (Mock2) M2() { fmt.Println("HELLO WORLD")}func main() { var i1 I1 i1 = T1{} i1.M1().M2() i1 = Mock1{} i1.M1().M2()}https://play.golang.org/p/sv-Uuuke1dr
2 回答
小怪獸愛吃肉
TA貢獻(xiàn)1852條經(jīng)驗(yàn) 獲得超1個(gè)贊
將您的依賴項(xiàng)包裝在嵌入依賴類型的結(jié)構(gòu)中：
// answer wrap your dependency
type Ta1 struct {
T1
}
func (Ta1) M1() I2 {
return Ta2{}
}
type Ta2 struct {
T2
}
然后它將起作用：
func main() {
var i1 I1
i1 = Ta1{}
i1.M1().M2()
i1 = Mock1{}
i1.M1().M2()
}
嘗試一下https://play.golang.org/p/aHr78dY_c9a
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