覆盖匿名结构函数

Question

How can I overwrite anonymous struct function.

To clarify what I mean look at the following code snippet:

package base

import (
    "fmt"
    "net/http"
)

type Executer interface {
    Execute()
}

type Controller struct { }

func (self *Controller) Execute() {
    fmt.Println("Hello Controller")
}

func (self *Controller) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
    self.Execute()
}

Now I am embedding the Controller struct into Test struct, also called anonymous

package base

import (
    "fmt"
    "net/http"
    "net/http/httptest"
    "testing"
)

type Test struct {
    Controller
}

func (self *Test) Execute() {
    fmt.Println("Hello Test")
}

func TestInheritance(t *testing.T) {
    ts := httptest.NewServer(&Test{})
    defer ts.Close()
    http.Get(ts.URL)
}

As output I've got "Hello Controller" but expected "Hello Test". You can see code above, I reimplement the execute function, but it does not work.

Answer 1

Since Test has no ServeHTTP method, your test server uses Controller's, which calls Controller.Execute(). If you want it to work properly, define ServeHTTP for the Test type.