在Golang中测试HTTP路由 [英] Testing HTTP routes in Golang

问题描述

我使用Gorilla mux和net / http包来创建一些路线，如下所示：

I am using Gorilla mux and the net/http package to create some routes as follows

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")
}

我正在编写一个测试来测试这些路由。例如，我试图测试 GET 路由，特别是试图让 400 返回，所以我进行了以下测试代码。

I am trying to write a test to test these routes. For example, I am trying to test the GET route specifically trying to get a 400 returned so I have the following test code.

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)
    }
}

然而，当我运行这个测试时，我得到一个 404 可以想象，因为这个请求没有被正确路由。

However, when I run this test, I get a 404 conceivably because the request is not being routed correctly.?

当我从浏览器测试这个GET路由时，它确实返回了一个 400 ，所以我确信测试的设置方式存在问题。

When I test this GET route from the browser, it does return a 400 so I'm certain there is an issue with the way the test is setup.

推荐答案

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：

The use of init() here is suspect. It only executes once as part of program initialization. Instead, perhaps something like:

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（）。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。

where you call setup() at the beginning of each appropriate test case. Your original code was sharing the same respRec with other tests, which probably polluted your test results.

如果您需要提供更多功能的测试框架，如安装/拆卸设备，请参阅 gocheck 等软件包。

If you need a testing framework that provides more features like setup/teardown fixtures, see packages such as gocheck.

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