在Golang中测试HTTP路由

Question

我正在使用Gorilla mux和net/http包创建一些路由,如下所示

package routes

//some imports

//some stuff

func AddQuestionRoutes(r *mux.Router) {
    s := r.PathPrefix("/questions").Subrouter()
    s.HandleFunc("/{question_id}/{question_type}", getQuestion).Methods("GET")
    s.HandleFunc("/", postQuestion).Methods("POST")
    s.HandleFunc("/", putQuestion).Methods("PUT")
    s.HandleFunc("/{question_id}", deleteQuestion).Methods("DELETE")
}

我正在尝试编写测试来测试这些路线.例如,我试图测试GET路由专门尝试400返回,所以我有以下测试代码.

package routes

//some imports

var m *mux.Router
var req *http.Request
var err error
var respRec *httptest.ResponseRecorder

func init() {
    //mux router with added question routes
    m = mux.NewRouter()
    AddQuestionRoutes(m)

    //The response recorder used to record HTTP responses
    respRec = httptest.NewRecorder()
}

func TestGet400(t *testing.T) {
    //Testing get of non existent question type
    req, err = http.NewRequest("GET", "/questions/1/SC", nil)
    if err != nil {
        t.Fatal("Creating 'GET /questions/1/SC' request failed!")
    }

    m.ServeHTTP(respRec, req)

    if respRec.Code != http.StatusBadRequest {
        t.Fatal("Server error: Returned ", respRec.Code, " instead of ", http.StatusBadRequest)
    }
}

但是,当我运行此测试时,我可以404想到,因为请求没有正确路由.

当我从浏览器测试这个GET路由时,它会返回一个,400所以我确定测试设置的方式存在问题.

Answer 1

这里使用init()是可疑的.它只作为程序初始化的一部分执行一次.相反,也许是这样的:

func setup() {
    //mux router with added question routes
    m = mux.NewRouter()
    AddQuestionRoutes(m)

    //The response recorder used to record HTTP responses
    respRec = httptest.NewRecorder()
}

func TestGet400(t *testing.T) {
    setup()
    //Testing get of non existent question type
    req, err = http.NewRequest("GET", "/questions/1/SC", nil)
    if err != nil {
        t.Fatal("Creating 'GET /questions/1/SC' request failed!")
    }

    m.ServeHTTP(respRec, req)

    if respRec.Code != http.StatusBadRequest {
        t.Fatal("Server error: Returned ", respRec.Code, " instead of ", http.StatusBadRequest)
    }
}

在每个适当的测试用例的开头调用setup()的地方.您的原始代码与其他测试共享相同的respRec,这可能会污染您的测试结果.

如果您需要一个提供更多功能的测试框架,例如setup/teardown fixture,请参阅gocheck等软件包.