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// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package tsweb
import (
"encoding/json"
"fmt"
"net/http"
"net/http/httptest"
"strings"
"testing"
)
type Data struct {
Name string
Price int
}
type Response struct {
Status string
Error string
Data *Data
}
func TestNewJSONHandler(t *testing.T) {
checkStatus := func(w *httptest.ResponseRecorder, status string, code int) *Response {
d := &Response{
Data: &Data{},
}
t.Logf("%s", w.Body.Bytes())
err := json.Unmarshal(w.Body.Bytes(), d)
if err != nil {
t.Logf(err.Error())
return nil
}
if d.Status == status {
t.Logf("ok: %s", d.Status)
} else {
t.Fatalf("wrong status: %s %s", d.Status, status)
}
if w.Code != code {
t.Fatalf("wrong status code: %d %d", w.Code, code)
}
if w.Header().Get("Content-Type") != "application/json" {
t.Fatalf("wrong content type: %s", w.Header().Get("Content-Type"))
}
return d
}
h21 := JSONHandlerFunc(func(r *http.Request) (int, interface{}, error) {
return http.StatusOK, nil, nil
})
t.Run("200 simple", func(t *testing.T) {
w := httptest.NewRecorder()
r := httptest.NewRequest("GET", "/", nil)
h21.ServeHTTP(w, r)
checkStatus(w, "success", http.StatusOK)
})
t.Run("403 HTTPError", func(t *testing.T) {
h := JSONHandlerFunc(func(r *http.Request) (int, interface{}, error) {
return http.StatusForbidden, nil, fmt.Errorf("forbidden")
})
w := httptest.NewRecorder()
r := httptest.NewRequest("GET", "/", nil)
h.ServeHTTP(w, r)
checkStatus(w, "error", http.StatusForbidden)
})
h22 := JSONHandlerFunc(func(r *http.Request) (int, interface{}, error) {
return http.StatusOK, &Data{Name: "tailscale"}, nil
})
t.Run("200 get data", func(t *testing.T) {
w := httptest.NewRecorder()
r := httptest.NewRequest("GET", "/", nil)
h22.ServeHTTP(w, r)
checkStatus(w, "success", http.StatusOK)
})
h31 := JSONHandlerFunc(func(r *http.Request) (int, interface{}, error) {
body := new(Data)
if err := json.NewDecoder(r.Body).Decode(body); err != nil {
return http.StatusBadRequest, nil, err
}
if body.Name == "" {
return http.StatusBadRequest, nil, Error(http.StatusBadGateway, "name is empty", nil)
}
return http.StatusOK, nil, nil
})
t.Run("200 post data", func(t *testing.T) {
w := httptest.NewRecorder()
r := httptest.NewRequest("POST", "/", strings.NewReader(`{"Name": "tailscale"}`))
h31.ServeHTTP(w, r)
checkStatus(w, "success", http.StatusOK)
})
t.Run("400 bad json", func(t *testing.T) {
w := httptest.NewRecorder()
r := httptest.NewRequest("POST", "/", strings.NewReader(`{`))
h31.ServeHTTP(w, r)
checkStatus(w, "error", http.StatusBadRequest)
})
t.Run("400 post data error", func(t *testing.T) {
w := httptest.NewRecorder()
r := httptest.NewRequest("POST", "/", strings.NewReader(`{}`))
h31.ServeHTTP(w, r)
resp := checkStatus(w, "error", http.StatusBadRequest)
if resp.Error != "name is empty" {
t.Fatalf("wrong error")
}
})
h32 := JSONHandlerFunc(func(r *http.Request) (int, interface{}, error) {
body := new(Data)
if err := json.NewDecoder(r.Body).Decode(body); err != nil {
return http.StatusBadRequest, nil, err
}
if body.Name == "root" {
return http.StatusInternalServerError, nil, fmt.Errorf("invalid name")
}
if body.Price == 0 {
return http.StatusBadRequest, nil, Error(http.StatusBadGateway, "price is empty", nil)
}
return http.StatusOK, &Data{Price: body.Price * 2}, nil
})
t.Run("200 post data", func(t *testing.T) {
w := httptest.NewRecorder()
r := httptest.NewRequest("POST", "/", strings.NewReader(`{"Price": 10}`))
h32.ServeHTTP(w, r)
resp := checkStatus(w, "success", http.StatusOK)
t.Log(resp.Data)
if resp.Data.Price != 20 {
t.Fatalf("wrong price: %d %d", resp.Data.Price, 10)
}
})
t.Run("400 post data error", func(t *testing.T) {
w := httptest.NewRecorder()
r := httptest.NewRequest("POST", "/", strings.NewReader(`{}`))
h32.ServeHTTP(w, r)
resp := checkStatus(w, "error", http.StatusBadRequest)
if resp.Error != "price is empty" {
t.Fatalf("wrong error")
}
})
t.Run("500 internal server error", func(t *testing.T) {
w := httptest.NewRecorder()
r := httptest.NewRequest("POST", "/", strings.NewReader(`{"Name": "root"}`))
h32.ServeHTTP(w, r)
resp := checkStatus(w, "error", http.StatusInternalServerError)
if resp.Error != "internal server error" {
t.Fatalf("wrong error")
}
})
t.Run("500 misuse", func(t *testing.T) {
w := httptest.NewRecorder()
r := httptest.NewRequest("POST", "/", nil)
JSONHandlerFunc(func(r *http.Request) (int, interface{}, error) {
return http.StatusOK, make(chan int), nil
}).ServeHTTP(w, r)
resp := checkStatus(w, "error", http.StatusInternalServerError)
if resp.Error != "json marshal error" {
t.Fatalf("wrong error")
}
})
t.Run("500 empty status code", func(t *testing.T) {
w := httptest.NewRecorder()
r := httptest.NewRequest("POST", "/", nil)
JSONHandlerFunc(func(r *http.Request) (status int, data interface{}, err error) {
return
}).ServeHTTP(w, r)
checkStatus(w, "error", http.StatusInternalServerError)
})
}
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