2018-04-26 22:26:21 +03:00
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// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package acme
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import (
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"context"
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"fmt"
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"io/ioutil"
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"net/http"
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"net/http/httptest"
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"reflect"
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"strings"
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"testing"
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"time"
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)
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func TestDefaultBackoff(t *testing.T) {
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tt := []struct {
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nretry int
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retryAfter string // Retry-After header
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out time.Duration // expected min; max = min + jitter
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}{
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{-1, "", time.Second}, // verify the lower bound is 1
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{0, "", time.Second}, // verify the lower bound is 1
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{100, "", 10 * time.Second}, // verify the ceiling
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{1, "3600", time.Hour}, // verify the header value is used
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{1, "", 1 * time.Second},
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{2, "", 2 * time.Second},
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{3, "", 4 * time.Second},
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{4, "", 8 * time.Second},
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}
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for i, test := range tt {
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r := httptest.NewRequest("GET", "/", nil)
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resp := &http.Response{Header: http.Header{}}
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if test.retryAfter != "" {
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resp.Header.Set("Retry-After", test.retryAfter)
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}
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d := defaultBackoff(test.nretry, r, resp)
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max := test.out + time.Second // + max jitter
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if d < test.out || max < d {
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t.Errorf("%d: defaultBackoff(%v) = %v; want between %v and %v", i, test.nretry, d, test.out, max)
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}
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}
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}
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func TestErrorResponse(t *testing.T) {
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s := `{
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"status": 400,
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"type": "urn:acme:error:xxx",
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"detail": "text"
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}`
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res := &http.Response{
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StatusCode: 400,
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Status: "400 Bad Request",
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Body: ioutil.NopCloser(strings.NewReader(s)),
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Header: http.Header{"X-Foo": {"bar"}},
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}
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err := responseError(res)
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v, ok := err.(*Error)
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if !ok {
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t.Fatalf("err = %+v (%T); want *Error type", err, err)
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}
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if v.StatusCode != 400 {
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t.Errorf("v.StatusCode = %v; want 400", v.StatusCode)
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}
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if v.ProblemType != "urn:acme:error:xxx" {
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t.Errorf("v.ProblemType = %q; want urn:acme:error:xxx", v.ProblemType)
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}
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if v.Detail != "text" {
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t.Errorf("v.Detail = %q; want text", v.Detail)
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}
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if !reflect.DeepEqual(v.Header, res.Header) {
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t.Errorf("v.Header = %+v; want %+v", v.Header, res.Header)
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}
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}
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func TestPostWithRetries(t *testing.T) {
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var count int
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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count++
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w.Header().Set("Replay-Nonce", fmt.Sprintf("nonce%d", count))
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if r.Method == "HEAD" {
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// We expect the client to do 2 head requests to fetch
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// nonces, one to start and another after getting badNonce
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return
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}
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head, err := decodeJWSHead(r)
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2018-06-20 12:14:27 +03:00
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switch {
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case err != nil:
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2018-04-26 22:26:21 +03:00
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t.Errorf("decodeJWSHead: %v", err)
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2018-06-20 12:14:27 +03:00
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case head.Nonce == "":
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2018-04-26 22:26:21 +03:00
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t.Error("head.Nonce is empty")
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2018-06-20 12:14:27 +03:00
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case head.Nonce == "nonce1":
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// Return a badNonce error to force the call to retry.
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w.Header().Set("Retry-After", "0")
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2018-04-26 22:26:21 +03:00
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w.WriteHeader(http.StatusBadRequest)
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w.Write([]byte(`{"type":"urn:ietf:params:acme:error:badNonce"}`))
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return
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}
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// Make client.Authorize happy; we're not testing its result.
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w.WriteHeader(http.StatusCreated)
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w.Write([]byte(`{"status":"valid"}`))
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}))
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defer ts.Close()
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client := &Client{Key: testKey, dir: &Directory{AuthzURL: ts.URL}}
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// This call will fail with badNonce, causing a retry
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if _, err := client.Authorize(context.Background(), "example.com"); err != nil {
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t.Errorf("client.Authorize 1: %v", err)
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}
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if count != 4 {
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t.Errorf("total requests count: %d; want 4", count)
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}
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2018-06-20 12:14:27 +03:00
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}
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func TestRetryErrorType(t *testing.T) {
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Replay-Nonce", "nonce")
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w.WriteHeader(http.StatusTooManyRequests)
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w.Write([]byte(`{"type":"rateLimited"}`))
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}))
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defer ts.Close()
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client := &Client{
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Key: testKey,
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RetryBackoff: func(n int, r *http.Request, res *http.Response) time.Duration {
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// Do no retries.
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return 0
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},
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dir: &Directory{AuthzURL: ts.URL},
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}
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t.Run("post", func(t *testing.T) {
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testRetryErrorType(t, func() error {
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_, err := client.Authorize(context.Background(), "example.com")
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return err
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})
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})
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t.Run("get", func(t *testing.T) {
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testRetryErrorType(t, func() error {
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_, err := client.GetAuthorization(context.Background(), ts.URL)
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return err
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})
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})
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}
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func testRetryErrorType(t *testing.T, callClient func() error) {
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t.Helper()
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err := callClient()
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if err == nil {
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t.Fatal("client.Authorize returned nil error")
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}
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acmeErr, ok := err.(*Error)
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if !ok {
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t.Fatalf("err is %v (%T); want *Error", err, err)
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}
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if acmeErr.StatusCode != http.StatusTooManyRequests {
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t.Errorf("acmeErr.StatusCode = %d; want %d", acmeErr.StatusCode, http.StatusTooManyRequests)
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}
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if acmeErr.ProblemType != "rateLimited" {
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t.Errorf("acmeErr.ProblemType = %q; want 'rateLimited'", acmeErr.ProblemType)
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}
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2018-04-26 22:26:21 +03:00
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}
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func TestRetryBackoffArgs(t *testing.T) {
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const resCode = http.StatusInternalServerError
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Replay-Nonce", "test-nonce")
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w.WriteHeader(resCode)
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}))
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defer ts.Close()
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// Canceled in backoff.
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ctx, cancel := context.WithCancel(context.Background())
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var nretry int
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backoff := func(n int, r *http.Request, res *http.Response) time.Duration {
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nretry++
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if n != nretry {
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t.Errorf("n = %d; want %d", n, nretry)
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}
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if nretry == 3 {
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cancel()
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}
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if r == nil {
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t.Error("r is nil")
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}
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if res.StatusCode != resCode {
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t.Errorf("res.StatusCode = %d; want %d", res.StatusCode, resCode)
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}
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return time.Millisecond
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}
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client := &Client{
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Key: testKey,
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RetryBackoff: backoff,
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dir: &Directory{AuthzURL: ts.URL},
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}
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if _, err := client.Authorize(ctx, "example.com"); err == nil {
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t.Error("err is nil")
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}
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if nretry != 3 {
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t.Errorf("nretry = %d; want 3", nretry)
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}
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}
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