使用 Echo 测试 POST 请求(预期与实际输出) [英] Testing POST request with Echo (expected vs actual output)
问题描述
我是 Go 的新手，所以，如果这是一个愚蠢的问题，抱歉.
I'm kinda new in Go, so, sorry if this is a silly question.
我最近一直在使用 Echo 尝试一些 API.我正在尝试测试 Go echo 的路由(POST)处理程序，它获取一个 json 并将其放入一个数组中.下面是处理程序 main.go 和测试 test_main.go
I have been recently trying some API with Echo. I'm trying to test a route(POST) handler of Go echo that gets a json and puts it in an array. Bellow is the code for the handler main.go and for the test test_main.go
main.go
type Houses struct {
Name string `json:"name,ommitempty"`
Address string `json:"address,omitempty"`
}
var houses []Houses
func newHouse(c echo.Context) error {
m := echo.Map{}
if err := c.Bind(&m); err != nil {
return err
}
dv := Houses{
Name: m["name"].(string),
Address: m["address"].(string),
}
houses = append(houses, dv)
js, _ := json.Marshal(houses)
fmt.Println(fmt.Sprintf("%s", js))
return c.JSON(http.StatusOK, string(js))
}
test_main.go
import (
"net/http"
"net/http/httptest"
"strings"
"testing"
"github.com/labstack/echo"
"github.com/stretchr/testify/assert"
)
var userJSON = `{"name":"Jhon Doe","address":"High St."}`
func TestModel(t *testing.T) {
url := "/new_house"
e := echo.New()
req, err := http.NewRequest(http.MethodPost, url, strings.NewReader(userJSON))
req.Header.Set("Content-Type", "application/json")
if err != nil {
t.Errorf("The request could not be created because of: %v", err)
}
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
// c.SetPath("/new_house")
// c.JSON(http.StatusOK, Devices{"Jhon Doe", "Middle Way"})
res := rec.Result()
defer res.Body.Close()
if assert.NoError(t, newHouse(c)) {
assert.Equal(t, http.StatusOK, rec.Code)
assert.Equal(t, "["+userJSON+"]", rec.Body.String())
}
}
即使处理程序在 curl 调用时正常工作，测试也会失败并显示如下错误.
The test fails with the error shown bellow even though the handler works properly if called by curl.
[{"name":"Jhon Doe","address":"High St."}]
--- FAIL: TestModel (0.00s)
/home/gaidaros/Code/echo-badger/models/model_test.go:34:
Error Trace: model_test.go:34
Error: Not equal:
expected: "[{\"name\":\"Jhon Doe\",\"address\":\"High St.\"}]"
actual : "\"[{\\\"name\\\":\\\"Jhon Doe\\\",\\\"address\\\":\\\"High St.\\\"}]\""
Diff:
--- Expected
+++ Actual
@@ -1 +1 @@
-[{"name":"Jhon Doe","address":"High St."}]
+"[{\"name\":\"Jhon Doe\",\"address\":\"High St.\"}]"
Test: TestModel
FAIL
exit status 1
经过几天的努力，我无法弄清楚如何使实际输出与预期相匹配，所以我在这里发帖希望能克服这个障碍.任何帮助表示赞赏！
After several days of struggling over it I couldn't figure out how to make the actual output to match the expected, so I'm posting here in hopes of getting past this obstacle. Any help is appreciated!
推荐答案
您正在对 []Houses 调用 json.Marshal，它将其编组为 JSON 字符串，那么您将使用 JSON 字符串调用 echo.Context.JSON，该字符串在内部调用 json.Marshal.双重编组导致转义.参见示例.(为简洁起见省略了错误检查)
You are calling json.Marshal on the []Houses, which marshals it to a JSON string, then you are calling echo.Context.JSON with the JSON string, which internally calls json.Marshal. Double marshalling causes the escaping. See example. (error checking omitted for brevity)
https://play.golang.org/p/nYvHS4huy0M
h := &Houses{"Jhon Doe", "High St."}
d, _ := json.Marshal(h)
// double marshal bad
d, _ = json.Marshal(string(d))
fmt.Println(string(d))
// prints "{\"name\":\"Jhon Doe\",\"address\":\"High St.\"}"
您的解决方案是将切片传递给您的 c.JSON 调用.作为旁注，您应该能够将结构传递给 c.Bind 而不是使用带有类型断言的映射.
Your solution is to just pass the slice to your c.JSON call. As a side note, you should be able to pass the struct to c.Bind instead of using a map with type assertions.
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