ooni-probe-cli/internal/ooapi/clientcall_test.go
Simone Basso 0fdc9cafb5
fix(all): introduce and use iox.ReadAllContext (#379)
* fix(all): introduce and use iox.ReadAllContext

This improvement over the ioutil.ReadAll utility returns early
if the context expires. This enables us to unblock stuck code in
case there's censorship confounding the TCP stack.

See https://github.com/ooni/probe/issues/1417.

Compared to the functionality postulated in the above mentioned
issue, I choose to be more generic and separate limiting the
maximum body size (not implemented here) from using the context
to return early when reading a body (or any other reader).

After implementing iox.ReadAllContext, I made sure we always
use it everywhere in the tree instead of ioutil.ReadAll.

This includes many parts of the codebase where in theory we don't
need iox.ReadAllContext. Though, changing all the places makes
checking whether we're not using ioutil.ReadAll where we should
not be using it easy: `git grep` should return no lines.

* Update internal/iox/iox_test.go

* fix(ndt7): treat context errors as non-errors

The rationale is explained by the comment documenting reduceErr.

* Update internal/engine/experiment/ndt7/download.go
2021-06-15 11:57:40 +02:00

900 lines
20 KiB
Go

// Code generated by go generate; DO NOT EDIT.
// 2021-06-15 10:55:57.708833 +0200 CEST m=+0.000193418
package ooapi
//go:generate go run ./internal/generator -file clientcall_test.go
import (
"context"
"encoding/json"
"net/http"
"net/http/httptest"
"net/url"
"sync"
"testing"
"github.com/google/go-cmp/cmp"
"github.com/ooni/probe-cli/v3/internal/iox"
"github.com/ooni/probe-cli/v3/internal/kvstore"
"github.com/ooni/probe-cli/v3/internal/ooapi/apimodel"
)
type handleClientCallCheckReportID struct {
accept string
body []byte
contentType string
count int32
method string
mu sync.Mutex
resp *apimodel.CheckReportIDResponse
url *url.URL
userAgent string
}
func (h *handleClientCallCheckReportID) ServeHTTP(w http.ResponseWriter, r *http.Request) {
ff := fakeFill{}
defer h.mu.Unlock()
h.mu.Lock()
if h.count > 0 {
w.WriteHeader(400)
return
}
h.count++
if r.Body != nil {
data, err := iox.ReadAllContext(r.Context(), r.Body)
if err != nil {
w.WriteHeader(400)
return
}
h.body = data
}
h.method = r.Method
h.url = r.URL
h.accept = r.Header.Get("Accept")
h.contentType = r.Header.Get("Content-Type")
h.userAgent = r.Header.Get("User-Agent")
var out *apimodel.CheckReportIDResponse
ff.fill(&out)
h.resp = out
data, err := json.Marshal(out)
if err != nil {
w.WriteHeader(400)
return
}
w.Write(data)
}
func TestCheckReportIDClientCallRoundTrip(t *testing.T) {
// setup
handler := &handleClientCallCheckReportID{}
srvr := httptest.NewServer(handler)
defer srvr.Close()
req := &apimodel.CheckReportIDRequest{}
ff := &fakeFill{}
ff.fill(&req)
clnt := &Client{KVStore: &kvstore.Memory{}, BaseURL: srvr.URL}
ff.fill(&clnt.UserAgent)
// issue request
ctx := context.Background()
resp, err := clnt.CheckReportID(ctx, req)
if err != nil {
t.Fatal(err)
}
if resp == nil {
t.Fatal("expected non-nil response here")
}
// compare our response and server's one
if diff := cmp.Diff(handler.resp, resp); diff != "" {
t.Fatal(diff)
}
// check whether headers are OK
if handler.accept != "application/json" {
t.Fatal("invalid accept header")
}
if handler.userAgent != clnt.UserAgent {
t.Fatal("invalid user-agent header")
}
// check whether the method is OK
if handler.method != "GET" {
t.Fatal("invalid method")
}
// check the query
api := &simpleCheckReportIDAPI{BaseURL: srvr.URL}
httpReq, err := api.newRequest(context.Background(), req)
if err != nil {
t.Fatal(err)
}
if diff := cmp.Diff(handler.url.Path, httpReq.URL.Path); diff != "" {
t.Fatal(diff)
}
if diff := cmp.Diff(handler.url.RawQuery, httpReq.URL.RawQuery); diff != "" {
t.Fatal(diff)
}
}
type handleClientCallCheckIn struct {
accept string
body []byte
contentType string
count int32
method string
mu sync.Mutex
resp *apimodel.CheckInResponse
url *url.URL
userAgent string
}
func (h *handleClientCallCheckIn) ServeHTTP(w http.ResponseWriter, r *http.Request) {
ff := fakeFill{}
defer h.mu.Unlock()
h.mu.Lock()
if h.count > 0 {
w.WriteHeader(400)
return
}
h.count++
if r.Body != nil {
data, err := iox.ReadAllContext(r.Context(), r.Body)
if err != nil {
w.WriteHeader(400)
return
}
h.body = data
}
h.method = r.Method
h.url = r.URL
h.accept = r.Header.Get("Accept")
h.contentType = r.Header.Get("Content-Type")
h.userAgent = r.Header.Get("User-Agent")
var out *apimodel.CheckInResponse
ff.fill(&out)
h.resp = out
data, err := json.Marshal(out)
if err != nil {
w.WriteHeader(400)
return
}
w.Write(data)
}
func TestCheckInClientCallRoundTrip(t *testing.T) {
// setup
handler := &handleClientCallCheckIn{}
srvr := httptest.NewServer(handler)
defer srvr.Close()
req := &apimodel.CheckInRequest{}
ff := &fakeFill{}
ff.fill(&req)
clnt := &Client{KVStore: &kvstore.Memory{}, BaseURL: srvr.URL}
ff.fill(&clnt.UserAgent)
// issue request
ctx := context.Background()
resp, err := clnt.CheckIn(ctx, req)
if err != nil {
t.Fatal(err)
}
if resp == nil {
t.Fatal("expected non-nil response here")
}
// compare our response and server's one
if diff := cmp.Diff(handler.resp, resp); diff != "" {
t.Fatal(diff)
}
// check whether headers are OK
if handler.accept != "application/json" {
t.Fatal("invalid accept header")
}
if handler.userAgent != clnt.UserAgent {
t.Fatal("invalid user-agent header")
}
// check whether the method is OK
if handler.method != "POST" {
t.Fatal("invalid method")
}
// check the body
if handler.contentType != "application/json" {
t.Fatal("invalid content-type header")
}
got := &apimodel.CheckInRequest{}
if err := json.Unmarshal(handler.body, &got); err != nil {
t.Fatal(err)
}
if diff := cmp.Diff(req, got); diff != "" {
t.Fatal(diff)
}
}
type handleClientCallMeasurementMeta struct {
accept string
body []byte
contentType string
count int32
method string
mu sync.Mutex
resp *apimodel.MeasurementMetaResponse
url *url.URL
userAgent string
}
func (h *handleClientCallMeasurementMeta) ServeHTTP(w http.ResponseWriter, r *http.Request) {
ff := fakeFill{}
defer h.mu.Unlock()
h.mu.Lock()
if h.count > 0 {
w.WriteHeader(400)
return
}
h.count++
if r.Body != nil {
data, err := iox.ReadAllContext(r.Context(), r.Body)
if err != nil {
w.WriteHeader(400)
return
}
h.body = data
}
h.method = r.Method
h.url = r.URL
h.accept = r.Header.Get("Accept")
h.contentType = r.Header.Get("Content-Type")
h.userAgent = r.Header.Get("User-Agent")
var out *apimodel.MeasurementMetaResponse
ff.fill(&out)
h.resp = out
data, err := json.Marshal(out)
if err != nil {
w.WriteHeader(400)
return
}
w.Write(data)
}
func TestMeasurementMetaClientCallRoundTrip(t *testing.T) {
// setup
handler := &handleClientCallMeasurementMeta{}
srvr := httptest.NewServer(handler)
defer srvr.Close()
req := &apimodel.MeasurementMetaRequest{}
ff := &fakeFill{}
ff.fill(&req)
clnt := &Client{KVStore: &kvstore.Memory{}, BaseURL: srvr.URL}
ff.fill(&clnt.UserAgent)
// issue request
ctx := context.Background()
resp, err := clnt.MeasurementMeta(ctx, req)
if err != nil {
t.Fatal(err)
}
if resp == nil {
t.Fatal("expected non-nil response here")
}
// compare our response and server's one
if diff := cmp.Diff(handler.resp, resp); diff != "" {
t.Fatal(diff)
}
// check whether headers are OK
if handler.accept != "application/json" {
t.Fatal("invalid accept header")
}
if handler.userAgent != clnt.UserAgent {
t.Fatal("invalid user-agent header")
}
// check whether the method is OK
if handler.method != "GET" {
t.Fatal("invalid method")
}
// check the query
api := &simpleMeasurementMetaAPI{BaseURL: srvr.URL}
httpReq, err := api.newRequest(context.Background(), req)
if err != nil {
t.Fatal(err)
}
if diff := cmp.Diff(handler.url.Path, httpReq.URL.Path); diff != "" {
t.Fatal(diff)
}
if diff := cmp.Diff(handler.url.RawQuery, httpReq.URL.RawQuery); diff != "" {
t.Fatal(diff)
}
}
type handleClientCallTestHelpers struct {
accept string
body []byte
contentType string
count int32
method string
mu sync.Mutex
resp apimodel.TestHelpersResponse
url *url.URL
userAgent string
}
func (h *handleClientCallTestHelpers) ServeHTTP(w http.ResponseWriter, r *http.Request) {
ff := fakeFill{}
defer h.mu.Unlock()
h.mu.Lock()
if h.count > 0 {
w.WriteHeader(400)
return
}
h.count++
if r.Body != nil {
data, err := iox.ReadAllContext(r.Context(), r.Body)
if err != nil {
w.WriteHeader(400)
return
}
h.body = data
}
h.method = r.Method
h.url = r.URL
h.accept = r.Header.Get("Accept")
h.contentType = r.Header.Get("Content-Type")
h.userAgent = r.Header.Get("User-Agent")
var out apimodel.TestHelpersResponse
ff.fill(&out)
h.resp = out
data, err := json.Marshal(out)
if err != nil {
w.WriteHeader(400)
return
}
w.Write(data)
}
func TestTestHelpersClientCallRoundTrip(t *testing.T) {
// setup
handler := &handleClientCallTestHelpers{}
srvr := httptest.NewServer(handler)
defer srvr.Close()
req := &apimodel.TestHelpersRequest{}
ff := &fakeFill{}
ff.fill(&req)
clnt := &Client{KVStore: &kvstore.Memory{}, BaseURL: srvr.URL}
ff.fill(&clnt.UserAgent)
// issue request
ctx := context.Background()
resp, err := clnt.TestHelpers(ctx, req)
if err != nil {
t.Fatal(err)
}
if resp == nil {
t.Fatal("expected non-nil response here")
}
// compare our response and server's one
if diff := cmp.Diff(handler.resp, resp); diff != "" {
t.Fatal(diff)
}
// check whether headers are OK
if handler.accept != "application/json" {
t.Fatal("invalid accept header")
}
if handler.userAgent != clnt.UserAgent {
t.Fatal("invalid user-agent header")
}
// check whether the method is OK
if handler.method != "GET" {
t.Fatal("invalid method")
}
// check the query
api := &simpleTestHelpersAPI{BaseURL: srvr.URL}
httpReq, err := api.newRequest(context.Background(), req)
if err != nil {
t.Fatal(err)
}
if diff := cmp.Diff(handler.url.Path, httpReq.URL.Path); diff != "" {
t.Fatal(diff)
}
if diff := cmp.Diff(handler.url.RawQuery, httpReq.URL.RawQuery); diff != "" {
t.Fatal(diff)
}
}
type handleClientCallPsiphonConfig struct {
accept string
body []byte
contentType string
count int32
method string
mu sync.Mutex
resp apimodel.PsiphonConfigResponse
url *url.URL
userAgent string
}
func (h *handleClientCallPsiphonConfig) ServeHTTP(w http.ResponseWriter, r *http.Request) {
ff := fakeFill{}
if r.URL.Path == "/api/v1/register" {
var out apimodel.RegisterResponse
ff.fill(&out)
data, err := json.Marshal(out)
if err != nil {
w.WriteHeader(400)
return
}
w.Write(data)
return
}
if r.URL.Path == "/api/v1/login" {
var out apimodel.LoginResponse
ff.fill(&out)
data, err := json.Marshal(out)
if err != nil {
w.WriteHeader(400)
return
}
w.Write(data)
return
}
defer h.mu.Unlock()
h.mu.Lock()
if h.count > 0 {
w.WriteHeader(400)
return
}
h.count++
if r.Body != nil {
data, err := iox.ReadAllContext(r.Context(), r.Body)
if err != nil {
w.WriteHeader(400)
return
}
h.body = data
}
h.method = r.Method
h.url = r.URL
h.accept = r.Header.Get("Accept")
h.contentType = r.Header.Get("Content-Type")
h.userAgent = r.Header.Get("User-Agent")
var out apimodel.PsiphonConfigResponse
ff.fill(&out)
h.resp = out
data, err := json.Marshal(out)
if err != nil {
w.WriteHeader(400)
return
}
w.Write(data)
}
func TestPsiphonConfigClientCallRoundTrip(t *testing.T) {
// setup
handler := &handleClientCallPsiphonConfig{}
srvr := httptest.NewServer(handler)
defer srvr.Close()
req := &apimodel.PsiphonConfigRequest{}
ff := &fakeFill{}
ff.fill(&req)
clnt := &Client{KVStore: &kvstore.Memory{}, BaseURL: srvr.URL}
ff.fill(&clnt.UserAgent)
// issue request
ctx := context.Background()
resp, err := clnt.PsiphonConfig(ctx, req)
if err != nil {
t.Fatal(err)
}
if resp == nil {
t.Fatal("expected non-nil response here")
}
// compare our response and server's one
if diff := cmp.Diff(handler.resp, resp); diff != "" {
t.Fatal(diff)
}
// check whether headers are OK
if handler.accept != "application/json" {
t.Fatal("invalid accept header")
}
if handler.userAgent != clnt.UserAgent {
t.Fatal("invalid user-agent header")
}
// check whether the method is OK
if handler.method != "GET" {
t.Fatal("invalid method")
}
// check the query
api := &simplePsiphonConfigAPI{BaseURL: srvr.URL}
httpReq, err := api.newRequest(context.Background(), req)
if err != nil {
t.Fatal(err)
}
if diff := cmp.Diff(handler.url.Path, httpReq.URL.Path); diff != "" {
t.Fatal(diff)
}
if diff := cmp.Diff(handler.url.RawQuery, httpReq.URL.RawQuery); diff != "" {
t.Fatal(diff)
}
}
type handleClientCallTorTargets struct {
accept string
body []byte
contentType string
count int32
method string
mu sync.Mutex
resp apimodel.TorTargetsResponse
url *url.URL
userAgent string
}
func (h *handleClientCallTorTargets) ServeHTTP(w http.ResponseWriter, r *http.Request) {
ff := fakeFill{}
if r.URL.Path == "/api/v1/register" {
var out apimodel.RegisterResponse
ff.fill(&out)
data, err := json.Marshal(out)
if err != nil {
w.WriteHeader(400)
return
}
w.Write(data)
return
}
if r.URL.Path == "/api/v1/login" {
var out apimodel.LoginResponse
ff.fill(&out)
data, err := json.Marshal(out)
if err != nil {
w.WriteHeader(400)
return
}
w.Write(data)
return
}
defer h.mu.Unlock()
h.mu.Lock()
if h.count > 0 {
w.WriteHeader(400)
return
}
h.count++
if r.Body != nil {
data, err := iox.ReadAllContext(r.Context(), r.Body)
if err != nil {
w.WriteHeader(400)
return
}
h.body = data
}
h.method = r.Method
h.url = r.URL
h.accept = r.Header.Get("Accept")
h.contentType = r.Header.Get("Content-Type")
h.userAgent = r.Header.Get("User-Agent")
var out apimodel.TorTargetsResponse
ff.fill(&out)
h.resp = out
data, err := json.Marshal(out)
if err != nil {
w.WriteHeader(400)
return
}
w.Write(data)
}
func TestTorTargetsClientCallRoundTrip(t *testing.T) {
// setup
handler := &handleClientCallTorTargets{}
srvr := httptest.NewServer(handler)
defer srvr.Close()
req := &apimodel.TorTargetsRequest{}
ff := &fakeFill{}
ff.fill(&req)
clnt := &Client{KVStore: &kvstore.Memory{}, BaseURL: srvr.URL}
ff.fill(&clnt.UserAgent)
// issue request
ctx := context.Background()
resp, err := clnt.TorTargets(ctx, req)
if err != nil {
t.Fatal(err)
}
if resp == nil {
t.Fatal("expected non-nil response here")
}
// compare our response and server's one
if diff := cmp.Diff(handler.resp, resp); diff != "" {
t.Fatal(diff)
}
// check whether headers are OK
if handler.accept != "application/json" {
t.Fatal("invalid accept header")
}
if handler.userAgent != clnt.UserAgent {
t.Fatal("invalid user-agent header")
}
// check whether the method is OK
if handler.method != "GET" {
t.Fatal("invalid method")
}
// check the query
api := &simpleTorTargetsAPI{BaseURL: srvr.URL}
httpReq, err := api.newRequest(context.Background(), req)
if err != nil {
t.Fatal(err)
}
if diff := cmp.Diff(handler.url.Path, httpReq.URL.Path); diff != "" {
t.Fatal(diff)
}
if diff := cmp.Diff(handler.url.RawQuery, httpReq.URL.RawQuery); diff != "" {
t.Fatal(diff)
}
}
type handleClientCallURLs struct {
accept string
body []byte
contentType string
count int32
method string
mu sync.Mutex
resp *apimodel.URLsResponse
url *url.URL
userAgent string
}
func (h *handleClientCallURLs) ServeHTTP(w http.ResponseWriter, r *http.Request) {
ff := fakeFill{}
defer h.mu.Unlock()
h.mu.Lock()
if h.count > 0 {
w.WriteHeader(400)
return
}
h.count++
if r.Body != nil {
data, err := iox.ReadAllContext(r.Context(), r.Body)
if err != nil {
w.WriteHeader(400)
return
}
h.body = data
}
h.method = r.Method
h.url = r.URL
h.accept = r.Header.Get("Accept")
h.contentType = r.Header.Get("Content-Type")
h.userAgent = r.Header.Get("User-Agent")
var out *apimodel.URLsResponse
ff.fill(&out)
h.resp = out
data, err := json.Marshal(out)
if err != nil {
w.WriteHeader(400)
return
}
w.Write(data)
}
func TestURLsClientCallRoundTrip(t *testing.T) {
// setup
handler := &handleClientCallURLs{}
srvr := httptest.NewServer(handler)
defer srvr.Close()
req := &apimodel.URLsRequest{}
ff := &fakeFill{}
ff.fill(&req)
clnt := &Client{KVStore: &kvstore.Memory{}, BaseURL: srvr.URL}
ff.fill(&clnt.UserAgent)
// issue request
ctx := context.Background()
resp, err := clnt.URLs(ctx, req)
if err != nil {
t.Fatal(err)
}
if resp == nil {
t.Fatal("expected non-nil response here")
}
// compare our response and server's one
if diff := cmp.Diff(handler.resp, resp); diff != "" {
t.Fatal(diff)
}
// check whether headers are OK
if handler.accept != "application/json" {
t.Fatal("invalid accept header")
}
if handler.userAgent != clnt.UserAgent {
t.Fatal("invalid user-agent header")
}
// check whether the method is OK
if handler.method != "GET" {
t.Fatal("invalid method")
}
// check the query
api := &simpleURLsAPI{BaseURL: srvr.URL}
httpReq, err := api.newRequest(context.Background(), req)
if err != nil {
t.Fatal(err)
}
if diff := cmp.Diff(handler.url.Path, httpReq.URL.Path); diff != "" {
t.Fatal(diff)
}
if diff := cmp.Diff(handler.url.RawQuery, httpReq.URL.RawQuery); diff != "" {
t.Fatal(diff)
}
}
type handleClientCallOpenReport struct {
accept string
body []byte
contentType string
count int32
method string
mu sync.Mutex
resp *apimodel.OpenReportResponse
url *url.URL
userAgent string
}
func (h *handleClientCallOpenReport) ServeHTTP(w http.ResponseWriter, r *http.Request) {
ff := fakeFill{}
defer h.mu.Unlock()
h.mu.Lock()
if h.count > 0 {
w.WriteHeader(400)
return
}
h.count++
if r.Body != nil {
data, err := iox.ReadAllContext(r.Context(), r.Body)
if err != nil {
w.WriteHeader(400)
return
}
h.body = data
}
h.method = r.Method
h.url = r.URL
h.accept = r.Header.Get("Accept")
h.contentType = r.Header.Get("Content-Type")
h.userAgent = r.Header.Get("User-Agent")
var out *apimodel.OpenReportResponse
ff.fill(&out)
h.resp = out
data, err := json.Marshal(out)
if err != nil {
w.WriteHeader(400)
return
}
w.Write(data)
}
func TestOpenReportClientCallRoundTrip(t *testing.T) {
// setup
handler := &handleClientCallOpenReport{}
srvr := httptest.NewServer(handler)
defer srvr.Close()
req := &apimodel.OpenReportRequest{}
ff := &fakeFill{}
ff.fill(&req)
clnt := &Client{KVStore: &kvstore.Memory{}, BaseURL: srvr.URL}
ff.fill(&clnt.UserAgent)
// issue request
ctx := context.Background()
resp, err := clnt.OpenReport(ctx, req)
if err != nil {
t.Fatal(err)
}
if resp == nil {
t.Fatal("expected non-nil response here")
}
// compare our response and server's one
if diff := cmp.Diff(handler.resp, resp); diff != "" {
t.Fatal(diff)
}
// check whether headers are OK
if handler.accept != "application/json" {
t.Fatal("invalid accept header")
}
if handler.userAgent != clnt.UserAgent {
t.Fatal("invalid user-agent header")
}
// check whether the method is OK
if handler.method != "POST" {
t.Fatal("invalid method")
}
// check the body
if handler.contentType != "application/json" {
t.Fatal("invalid content-type header")
}
got := &apimodel.OpenReportRequest{}
if err := json.Unmarshal(handler.body, &got); err != nil {
t.Fatal(err)
}
if diff := cmp.Diff(req, got); diff != "" {
t.Fatal(diff)
}
}
type handleClientCallSubmitMeasurement struct {
accept string
body []byte
contentType string
count int32
method string
mu sync.Mutex
resp *apimodel.SubmitMeasurementResponse
url *url.URL
userAgent string
}
func (h *handleClientCallSubmitMeasurement) ServeHTTP(w http.ResponseWriter, r *http.Request) {
ff := fakeFill{}
defer h.mu.Unlock()
h.mu.Lock()
if h.count > 0 {
w.WriteHeader(400)
return
}
h.count++
if r.Body != nil {
data, err := iox.ReadAllContext(r.Context(), r.Body)
if err != nil {
w.WriteHeader(400)
return
}
h.body = data
}
h.method = r.Method
h.url = r.URL
h.accept = r.Header.Get("Accept")
h.contentType = r.Header.Get("Content-Type")
h.userAgent = r.Header.Get("User-Agent")
var out *apimodel.SubmitMeasurementResponse
ff.fill(&out)
h.resp = out
data, err := json.Marshal(out)
if err != nil {
w.WriteHeader(400)
return
}
w.Write(data)
}
func TestSubmitMeasurementClientCallRoundTrip(t *testing.T) {
// setup
handler := &handleClientCallSubmitMeasurement{}
srvr := httptest.NewServer(handler)
defer srvr.Close()
req := &apimodel.SubmitMeasurementRequest{}
ff := &fakeFill{}
ff.fill(&req)
clnt := &Client{KVStore: &kvstore.Memory{}, BaseURL: srvr.URL}
ff.fill(&clnt.UserAgent)
// issue request
ctx := context.Background()
resp, err := clnt.SubmitMeasurement(ctx, req)
if err != nil {
t.Fatal(err)
}
if resp == nil {
t.Fatal("expected non-nil response here")
}
// compare our response and server's one
if diff := cmp.Diff(handler.resp, resp); diff != "" {
t.Fatal(diff)
}
// check whether headers are OK
if handler.accept != "application/json" {
t.Fatal("invalid accept header")
}
if handler.userAgent != clnt.UserAgent {
t.Fatal("invalid user-agent header")
}
// check whether the method is OK
if handler.method != "POST" {
t.Fatal("invalid method")
}
// check the body
if handler.contentType != "application/json" {
t.Fatal("invalid content-type header")
}
got := &apimodel.SubmitMeasurementRequest{}
if err := json.Unmarshal(handler.body, &got); err != nil {
t.Fatal(err)
}
if diff := cmp.Diff(req, got); diff != "" {
t.Fatal(diff)
}
}