如何测试请求是否因内容类型无效而失败？

Question

我将 Chi 与内置的AllowContentType 中间件一起使用。 给定这个样本

package main

import (
    "net/http"

    "github.com/go-chi/chi/v5"
    "github.com/go-chi/chi/v5/middleware"
)

func main() {
    http.ListenAndServe(":3000", GetRouter())
}

func GetRouter() *chi.Mux {
    apiRouter := chi.NewRouter()

    apiRouter.Use(middleware.AllowContentType("application/json"))

    apiRouter.Post("/my-route", func(responseWriter http.ResponseWriter, request *http.Request) {
        responseWriter.WriteHeader(http.StatusCreated)
    })

    return apiRouter
}

我想编写一个测试来检查如果内容类型不是application/json路由是否响应 415 ，我试过

package main

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

func TestGetRouter(testing *testing.T) {
    router := GetRouter()

    responseRecorder := httptest.NewRecorder()

    request, _ := http.NewRequest(http.MethodPost, "/my-route", nil)
    request.Header.Set("Content-Type", "text/xml")

    router.ServeHTTP(responseRecorder, request)

    if responseRecorder.Code != http.StatusUnsupportedMediaType {
        testing.Errorf("Expected statuscode %d but got %d", http.StatusUnsupportedMediaType, responseRecorder.Code)
    }
}

不幸的是，测试失败了

预期状态码 415 但得到 201

所以看起来中间件通过了并且路由处理程序发回了成功代码。 我如何修复测试以确保中间件拒绝带有 415 的请求？

Answer 1

看来我必须传入一个非空的请求正文（ 源代码），例如

requestBody := bytes.NewReader(make([]byte, 10, 10))

然后我可以像这样设置请求

request, _ := http.NewRequest(http.MethodPost, "/my-route", requestBody)