1
    2
    3
    4
    5
    6
    7
    8
    9
   10
   11
   12
   13
   14
   15
   16
   17
   18
   19
   20
   21
   22
   23
   24
   25
   26
   27
   28
   29
   30
   31
   32
   33
   34
   35
   36
   37
   38
   39
   40
   41
   42
   43
   44
   45
   46
   47
   48
   49
   50
   51
   52
   53
   54
   55
   56
   57
   58
   59
   60
   61
   62
   63
   64
   65
   66
   67
   68
   69
   70
   71
   72
   73
   74
   75
   76
   77
   78
   79
   80
   81
   82
   83
   84
   85
   86
   87
   88
   89
   90
   91
   92
   93
   94
   95
   96
   97
   98
   99
  100
  101
  102
  103
  104
  105
  106
  107
  108
  109
  110
  111
  112
  113
  114
  115
  116
  117
  118
  119
  120
  121
  122
  123
  124
  125
  126
  127
  128
  129
  130
  131
  132
  133
  134
  135
  136
  137
  138
  139
  140
  141
  142
  143
  144
  145
  146
  147
  148
  149
  150
  151
  152
  153
  154
  155
  156
  157
  158
  159
  160
  161
  162
  163
  164
  165
  166
  167
  168
  169
  170
  171
  172
  173
  174
  175
  176
  177
  178
  179
  180
  181
  182
  183
  184
  185
  186
  187
  188
  189
  190
  191
  192
  193
  194
  195
  196
  197
  198
  199
  200
  201
  202
  203
  204
  205
  206
  207
  208
  209
  210
  211
  212
  213
  214
  215
  216
  217
  218
  219
  220
  221
  222
  223
  224
  225
  226
  227
  228
  229
  230
  231
  232
  233
  234
  235
  236
  237
  238
  239
  240
  241
  242
  243
  244
  245
  246
  247
  248
  249
  250
  251
  252
  253
  254
  255
  256
  257
  258
  259
  260
  261
  262
  263
  264
  265
  266
  267
  268
  269
  270
  271
  272
  273
  274
  275
  276
  277
  278
  279
  280
  281
  282
  283
  284
  285
  286
  287
  288
  289
  290
  291
  292
  293
  294
  295
  296
  297
  298
  299
  300
  301
  302
  303
  304
  305
  306
  307
  308
  309
  310
  311
  312
  313
  314
  315
  316
  317
  318
  319
  320
  321
  322
  323
  324
  325
  326
  327
  328
  329
  330
  331
  332
  333
  334
  335
  336
  337
  338
  339
  340
  341
  342
  343
  344
  345
  346
  347
  348
  349
  350
  351
  352
  353
  354
  355
  356
  357
  358
  359
  360
  361
  362
  363
  364
  365
  366
  367
  368
  369
  370
  371
  372
  373
  374
  375
  376
  377
  378
  379
  380
  381
  382
  383
  384
  385
  386
  387
  388
  389
  390
  391
  392
  393
  394
  395
  396
  397
  398
  399
  400
  401
  402
  403
  404
  405
  406
  407
  408
  409
  410
  411
  412
  413
  414
  415
  416
  417
  418
  419
  420
  421
  422
  423
  424
  425
  426
  427
  428
  429
  430
  431
  432
  433
  434
  435
  436
  437
  438
  439
  440
  441
  442
  443
  444
  445
  446
  447
  448
  449
  450
  451
  452
  453
  454
  455
  456
  457
  458
  459
  460
  461
  462
  463
  464
  465
  466
  467
  468
  469
  470
  471
  472
  473
  474
  475
  476
  477
  478
  479
  480
  481
  482
  483
  484
  485
  486
  487
  488
  489
  490
  491
  492
  493
  494
  495
  496
  497
  498
  499
  500
  501
  502
  503
  504
  505
  506
  507
  508
  509
  510
  511
  512
  513
  514
  515
  516
  517
  518
  519
  520
  521
  522
  523
  524
  525
  526
  527
  528
  529
  530
  531
  532
  533
  534
  535
  536
  537
  538
  539
  540
  541
  542
  543
  544
  545
  546
  547
  548
  549
  550
  551
  552
  553
  554
  555
  556
  557
  558
  559
  560
  561
  562
  563
  564
  565
  566
  567
  568
  569
  570
  571
  572
  573
  574
  575
  576
  577
  578
  579
  580
  581
  582
  583
  584
  585
  586
  587
  588
  589
  590
  591
  592
  593
  594
  595
  596
  597
  598
  599
  600
  601
  602
  603
  604
  605
  606
  607
  608
  609
  610
  611
  612
  613
  614
  615
  616
  617
  618
  619
  620
  621
  622
  623
  624
  625
  626
  627
  628
  629
  630
  631
  632
  633
  634
  635
  636
  637
  638
  639
  640
  641
  642
  643
  644
  645
  646
  647
  648
  649
  650
  651
  652
  653
  654
  655
  656
  657
  658
  659
  660
  661
  662
  663
  664
  665
  666
  667
  668
  669
  670
  671
  672
  673
  674
  675
  676
  677
  678
  679
  680
  681
  682
  683
  684
  685
  686
  687
  688
  689
  690
  691
  692
  693
  694
  695
  696
  697
  698
  699
  700
  701
  702
  703
  704
  705
  706
  707
  708
  709
  710
  711
  712
  713
  714
  715
  716
  717
  718
  719
  720
  721
  722
  723
  724
  725
  726
  727
  728
  729
  730
  731
  732
  733
  734
  735
  736
  737
  738
  739
  740
  741
  742
  743
  744
  745
  746
  747
  748
  749
  750
  751
  752
  753
  754
  755
  756
  757
  758
  759
  760
  761
  762
  763
  764
  765
  766
  767
  768
  769
  770
  771
  772
  773
  774
  775
  776
  777
  778
  779
  780
  781
  782
  783
  784
  785
  786
  787
  788
  789
  790
  791
  792
  793
  794
  795
  796
  797
  798
  799
  800
  801
  802
  803
  804
  805
  806
  807
  808
  809
  810
  811
  812
  813
  814
  815
  816
  817
  818
  819
  820
  821
  822
  823
  824
  825
  826
  827
  828
  829
  830
  831
  832
  833
  834
  835
  836
  837
  838
  839
  840
  841
  842
  843
  844
  845
  846
  847
  848
  849
  850
  851
  852
  853
  854
  855
  856
  857
  858
  859
  860
  861
  862
  863
  864
  865
  866
  867
  868
  869
  870
  871
  872
  873
  874
  875
  876
  877
  878
  879
  880
  881
  882
  883
  884
  885
  886
  887
  888
  889
  890
  891
  892
  893
  894
  895
  896
  897
  898
  899
  900
  901
  902
  903
  904
  905
  906
  907
  908
  909
  910
  911
  912
  913
  914
  915
  916
  917
  918
  919
  920
  921
  922
  923
  924
  925
  926
  927
  928
  929
  930
  931
  932
  933
  934
  935
  936
  937
  938
  939
  940
  941
  942
  943
  944
  945
  946
  947
  948
  949
  950
  951
  952
  953
  954
  955
  956
  957
  958
  959
  960
  961
  962
  963
  964
  965
  966
  967
  968
  969
  970
  971
  972
  973
  974
  975
  976
  977
  978
  979
  980
  981
  982
  983
  984
  985
  986
  987
  988
  989
  990
  991
  992
  993
  994
  995
  996
  997
  998
  999
 1000
 1001
 1002
 1003
 1004
 1005
 1006
 1007
 1008
 1009
 1010
 1011
 1012
 1013
 1014
 1015
 1016
 1017
 1018
 1019
 1020
 1021
 1022
 1023
 1024
 1025
 1026
 1027
 1028
 1029
 1030
 1031
 1032
 1033
 1034
 1035
 1036
 1037
 1038
 1039
 1040
 1041
 1042
 1043
 1044
 1045
 1046
 1047
 1048
 1049
 1050
 1051
 1052
 1053
 1054
 1055
 1056
 1057
 1058
 1059
 1060
 1061
 1062
 1063
 1064
 1065
 1066
 1067
 1068
 1069
 1070
 1071
 1072
 1073
 1074
 1075
 1076
 1077
 1078
 1079
 1080
 1081
 1082
 1083
 1084
 1085
 1086
 1087
 1088
 1089
 1090
 1091
 1092
 1093
 1094
 1095
 1096
 1097
 1098
 1099
 1100
 1101
 1102
 1103
 1104
 1105
 1106
 1107
 1108
 1109
 1110
 1111
 1112
 1113
 1114
 1115
 1116
 1117
 1118
 1119
 1120
 1121
 1122
 1123
 1124
 1125
 1126
 1127
 1128
 1129
 1130
 1131
 1132
 1133
 1134
 1135
 1136
 1137
 1138
 1139
 1140
 1141
 1142
 1143
 1144
 1145
 1146
 1147
 1148
 1149
 1150
 1151
 1152
 1153
 1154
 1155
 1156
 1157
 1158
 1159
 1160
 1161
 1162
 1163
 1164
 1165
 1166
 1167
 1168
 1169
 1170
 1171
 1172
 1173
 1174
 1175
 1176
 1177
 1178
 1179
 1180
 1181
 1182
 1183
 1184
 1185
 1186
 1187
 1188
 1189
 1190
 1191
 1192
 1193
 1194
 1195
 1196
 1197
 1198
 1199
 1200
 1201
 1202

content / browser / service_worker / service_worker_main_resource_loader_unittest.cc [blame]

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/browser/service_worker/service_worker_main_resource_loader.h"

#include <string>
#include <utility>

#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "base/memory/raw_ptr.h"
#include "base/run_loop.h"
#include "base/strings/string_number_conversions.h"
#include "base/test/metrics/histogram_tester.h"
#include "base/time/time.h"
#include "content/browser/loader/navigation_loader_interceptor.h"
#include "content/browser/loader/response_head_update_params.h"
#include "content/browser/service_worker/embedded_worker_test_helper.h"
#include "content/browser/service_worker/fake_embedded_worker_instance_client.h"
#include "content/browser/service_worker/fake_service_worker.h"
#include "content/browser/service_worker/service_worker_client.h"
#include "content/browser/service_worker/service_worker_context_core.h"
#include "content/browser/service_worker/service_worker_fetch_dispatcher.h"
#include "content/browser/service_worker/service_worker_registration.h"
#include "content/browser/service_worker/service_worker_test_utils.h"
#include "content/browser/service_worker/service_worker_version.h"
#include "content/public/test/browser_task_environment.h"
#include "content/public/test/mock_render_process_host.h"
#include "mojo/public/cpp/system/data_pipe_utils.h"
#include "net/test/cert_test_util.h"
#include "net/test/test_data_directory.h"
#include "services/network/public/cpp/features.h"
#include "services/network/public/cpp/single_request_url_loader_factory.h"
#include "services/network/public/mojom/fetch_api.mojom.h"
#include "services/network/public/mojom/url_response_head.mojom.h"
#include "services/network/test/test_url_loader_client.h"
#include "storage/browser/blob/blob_data_builder.h"
#include "storage/browser/blob/blob_data_handle.h"
#include "storage/browser/blob/blob_impl.h"
#include "storage/browser/blob/blob_storage_context.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/public/common/storage_key/storage_key.h"
#include "third_party/blink/public/mojom/service_worker/service_worker.mojom.h"
#include "third_party/blink/public/mojom/service_worker/service_worker_event_status.mojom.h"
#include "third_party/blink/public/mojom/service_worker/service_worker_registration.mojom.h"
#include "third_party/blink/public/mojom/service_worker/service_worker_registration_options.mojom.h"
#include "url/origin.h"

namespace content {
namespace service_worker_main_resource_loader_unittest {

class ScopedOverrideToDisableHighPriorityFetchResponseCallback {
 public:
  ScopedOverrideToDisableHighPriorityFetchResponseCallback() {
    ServiceWorkerFetchDispatcher::
        ForceDisableHighPriorityFetchResponseCallbackForTesting(
            /*force_disable=*/true);
  }
  ScopedOverrideToDisableHighPriorityFetchResponseCallback(
      const ScopedOverrideToDisableHighPriorityFetchResponseCallback&) = delete;
  ScopedOverrideToDisableHighPriorityFetchResponseCallback& operator=(
      const ScopedOverrideToDisableHighPriorityFetchResponseCallback&) = delete;
  ~ScopedOverrideToDisableHighPriorityFetchResponseCallback() {
    ServiceWorkerFetchDispatcher::
        ForceDisableHighPriorityFetchResponseCallbackForTesting(
            /*force_disable=*/false);
  }
};

void ReceiveRequestHandler(
    network::SingleRequestURLLoaderFactory::RequestHandler* out_handler,
    network::SingleRequestURLLoaderFactory::RequestHandler handler) {
  *out_handler = std::move(handler);
}

blink::mojom::FetchAPIResponsePtr OkResponse(
    blink::mojom::SerializedBlobPtr blob_body,
    network::mojom::FetchResponseSource response_source,
    base::Time response_time,
    std::string cache_storage_cache_name) {
  auto response = blink::mojom::FetchAPIResponse::New();
  response->status_code = 200;
  response->status_text = "OK";
  response->response_type = network::mojom::FetchResponseType::kDefault;
  response->response_source = response_source;
  response->response_time = response_time;
  response->cache_storage_cache_name = cache_storage_cache_name;
  response->blob = std::move(blob_body);
  if (response->blob) {
    response->headers.emplace("Content-Length",
                              base::NumberToString(response->blob->size));
  }
  return response;
}

blink::mojom::FetchAPIResponsePtr ErrorResponse() {
  auto response = blink::mojom::FetchAPIResponse::New();
  response->status_code = 0;
  response->response_type = network::mojom::FetchResponseType::kDefault;
  response->error = blink::mojom::ServiceWorkerResponseError::kPromiseRejected;
  return response;
}

blink::mojom::FetchAPIResponsePtr RedirectResponse(
    const std::string& redirect_location_header) {
  auto response = blink::mojom::FetchAPIResponse::New();
  response->status_code = 301;
  response->status_text = "Moved Permanently";
  response->response_type = network::mojom::FetchResponseType::kDefault;
  response->headers["Location"] = redirect_location_header;
  return response;
}

blink::mojom::FetchAPIResponsePtr HeadersResponse(
    const base::flat_map<std::string, std::string>& headers) {
  auto response = blink::mojom::FetchAPIResponse::New();
  response->status_code = 200;
  response->status_text = "OK";
  response->headers.insert(headers.begin(), headers.end());
  return response;
}

// ServiceWorkerMainResourceLoader::RecordTimingMetrics() records the metrics
// only when the consistent high-resolution timer is used among processes.
bool LoaderRecordsTimingMetrics() {
  return base::TimeTicks::IsHighResolution() &&
         base::TimeTicks::IsConsistentAcrossProcesses();
}

// Simulates a service worker handling fetch events. The response can be
// customized via RespondWith* functions.
class FetchEventServiceWorker : public FakeServiceWorker {
 public:
  FetchEventServiceWorker(
      EmbeddedWorkerTestHelper* helper,
      FakeEmbeddedWorkerInstanceClient* embedded_worker_instance_client,
      BrowserTaskEnvironment* task_environment)
      : FakeServiceWorker(helper),
        task_environment_(task_environment),
        embedded_worker_instance_client_(embedded_worker_instance_client) {}

  FetchEventServiceWorker(const FetchEventServiceWorker&) = delete;
  FetchEventServiceWorker& operator=(const FetchEventServiceWorker&) = delete;

  ~FetchEventServiceWorker() override = default;

  // Tells this worker to dispatch a fetch event 1s after the fetch event is
  // received.
  void DispatchAfter1sDelay() {
    response_mode_ = ResponseMode::kDispatchAfter1sDelay;
  }

  // Tells this worker to respond to fetch events with the specified blob.
  void RespondWithBlob(blink::mojom::SerializedBlobPtr blob) {
    response_mode_ = ResponseMode::kBlob;
    blob_body_ = std::move(blob);
  }

  // Tells this worker to respond to fetch events with the specified stream.
  void RespondWithStream(
      mojo::PendingReceiver<blink::mojom::ServiceWorkerStreamCallback>
          callback_receiver,
      mojo::ScopedDataPipeConsumerHandle consumer_handle) {
    response_mode_ = ResponseMode::kStream;
    stream_handle_ = blink::mojom::ServiceWorkerStreamHandle::New();
    stream_handle_->callback_receiver = std::move(callback_receiver);
    stream_handle_->stream = std::move(consumer_handle);
  }

  // Tells this worker to respond to fetch events with network fallback.
  // i.e., simulate the service worker not calling respondWith().
  void RespondWithFallback() {
    response_mode_ = ResponseMode::kFallbackResponse;
  }

  // Tells this worker to respond to fetch events with an error response.
  void RespondWithError() { response_mode_ = ResponseMode::kErrorResponse; }

  // Tells this worker to respond to fetch events with a response containing
  // specific headers.
  void RespondWithHeaders(
      const base::flat_map<std::string, std::string>& headers) {
    response_mode_ = ResponseMode::kHeaders;
    headers_ = headers;
  }

  // Tells this worker to respond to fetch events with the redirect response.
  void RespondWithRedirectResponse(const GURL& new_url) {
    response_mode_ = ResponseMode::kRedirect;
    redirected_url_ = new_url;
  }

  // Tells this worker to simulate failure to dispatch the fetch event to the
  // service worker.
  void FailToDispatchFetchEvent() {
    response_mode_ = ResponseMode::kFailFetchEventDispatch;
  }

  // Tells this worker to simulate "early response", where the respondWith()
  // promise resolves before the waitUntil() promise. In this mode, the
  // helper sets the response mode to "early response", which simulates the
  // promise passed to respondWith() resolving before the waitUntil() promise
  // resolves. In this mode, the helper will respond to fetch events
  // immediately, but will not finish the fetch event until FinishWaitUntil() is
  // called.
  void RespondEarly() { response_mode_ = ResponseMode::kEarlyResponse; }
  void FinishWaitUntil() {
    std::move(finish_callback_)
        .Run(blink::mojom::ServiceWorkerEventStatus::COMPLETED);
    base::RunLoop().RunUntilIdle();
  }

  // Tells this worker to wait for FinishRespondWith() to be called before
  // providing the response to the fetch event.
  void DeferResponse() { response_mode_ = ResponseMode::kDeferredResponse; }
  void FinishRespondWith() {
    response_callback_->OnResponse(
        OkResponse(nullptr /* blob_body */, response_source_, response_time_,
                   cache_storage_cache_name_),
        blink::mojom::ServiceWorkerFetchEventTiming::New());
    response_callback_.FlushForTesting();
    std::move(finish_callback_)
        .Run(blink::mojom::ServiceWorkerEventStatus::COMPLETED);
  }

  void ReadRequestBody(std::string* out_string) {
    ASSERT_TRUE(request_body_);
    const std::vector<network::DataElement>* elements =
        request_body_->elements();
    // So far this test expects a single bytes element.
    ASSERT_EQ(1u, elements->size());
    const network::DataElement& element = elements->front();
    ASSERT_EQ(network::DataElement::Tag::kBytes, element.type());
    *out_string =
        std::string(element.As<network::DataElementBytes>().AsStringPiece());
  }

  void RunUntilFetchEvent() {
    if (has_received_fetch_event_)
      return;
    base::RunLoop run_loop;
    quit_closure_for_fetch_event_ = run_loop.QuitClosure();
    run_loop.Run();
  }

  void SetResponseSource(network::mojom::FetchResponseSource source) {
    response_source_ = source;
  }

  void SetCacheStorageCacheName(std::string cache_name) {
    cache_storage_cache_name_ = cache_name;
  }

  void SetResponseTime(base::Time time) { response_time_ = time; }

  void WaitForTransferInstalledScript() {
    embedded_worker_instance_client_->WaitForTransferInstalledScript();
  }

 protected:
  void DispatchFetchEventForMainResource(
      blink::mojom::DispatchFetchEventParamsPtr params,
      mojo::PendingRemote<blink::mojom::ServiceWorkerFetchResponseCallback>
          pending_response_callback,
      blink::mojom::ServiceWorker::DispatchFetchEventForMainResourceCallback
          finish_callback) override {
    // Basic checks on DispatchFetchEvent parameters.
    EXPECT_TRUE(params->request->is_main_resource_load);

    has_received_fetch_event_ = true;
    if (params->request->body)
      request_body_ = params->request->body;

    auto timing = blink::mojom::ServiceWorkerFetchEventTiming::New();
    auto now = base::TimeTicks::Now();
    timing->dispatch_event_time = now;
    timing->respond_with_settled_time = now;

    mojo::Remote<blink::mojom::ServiceWorkerFetchResponseCallback>
        response_callback(std::move(pending_response_callback));
    switch (response_mode_) {
      case ResponseMode::kDefault:
        FakeServiceWorker::DispatchFetchEventForMainResource(
            std::move(params), response_callback.Unbind(),
            std::move(finish_callback));
        break;
      case ResponseMode::kDispatchAfter1sDelay:
        task_environment_->AdvanceClock(base::Seconds(1));
        FakeServiceWorker::DispatchFetchEventForMainResource(
            std::move(params), response_callback.Unbind(),
            std::move(finish_callback));
        break;
      case ResponseMode::kBlob:
        response_callback->OnResponse(
            OkResponse(std::move(blob_body_), response_source_, response_time_,
                       cache_storage_cache_name_),
            std::move(timing));
        std::move(finish_callback)
            .Run(blink::mojom::ServiceWorkerEventStatus::COMPLETED);
        break;
      case ResponseMode::kStream:
        response_callback->OnResponseStream(
            OkResponse(nullptr /* blob_body */, response_source_,
                       response_time_, cache_storage_cache_name_),
            std::move(stream_handle_), std::move(timing));

        std::move(finish_callback)
            .Run(blink::mojom::ServiceWorkerEventStatus::COMPLETED);
        break;
      case ResponseMode::kFallbackResponse:
        response_callback->OnFallback(/*request_body=*/std::nullopt,
                                      std::move(timing));
        std::move(finish_callback)
            .Run(blink::mojom::ServiceWorkerEventStatus::COMPLETED);
        break;
      case ResponseMode::kErrorResponse:
        response_callback->OnResponse(ErrorResponse(), std::move(timing));
        std::move(finish_callback)
            .Run(blink::mojom::ServiceWorkerEventStatus::REJECTED);
        break;
      case ResponseMode::kFailFetchEventDispatch:
        // Simulate failure by stopping the worker before the event finishes.
        // This causes ServiceWorkerVersion::StartRequest() to call its error
        // callback, which triggers ServiceWorkerMainResourceLoader's dispatch
        // failed behavior.
        embedded_worker_instance_client_->host()->OnStopped();

        // Finish the event by calling |finish_callback|.
        // This is the Mojo callback for
        // blink::mojom::ServiceWorker::DispatchFetchEventForMainResource().
        // If this is not called, Mojo will complain. In production code,
        // ServiceWorkerContextClient would call this when it aborts all
        // callbacks after an unexpected stop.
        std::move(finish_callback)
            .Run(blink::mojom::ServiceWorkerEventStatus::ABORTED);
        break;
      case ResponseMode::kDeferredResponse:
        finish_callback_ = std::move(finish_callback);
        response_callback_ = std::move(response_callback);
        // Now the caller must call FinishRespondWith() to finish the event.
        break;
      case ResponseMode::kEarlyResponse:
        finish_callback_ = std::move(finish_callback);
        response_callback->OnResponse(
            OkResponse(nullptr /* blob_body */, response_source_,
                       response_time_, cache_storage_cache_name_),
            std::move(timing));
        // Now the caller must call FinishWaitUntil() to finish the event.
        break;
      case ResponseMode::kRedirect:
        response_callback->OnResponse(RedirectResponse(redirected_url_.spec()),
                                      std::move(timing));
        std::move(finish_callback)
            .Run(blink::mojom::ServiceWorkerEventStatus::COMPLETED);
        break;
      case ResponseMode::kHeaders:
        response_callback->OnResponse(HeadersResponse(headers_),
                                      std::move(timing));
        std::move(finish_callback)
            .Run(blink::mojom::ServiceWorkerEventStatus::COMPLETED);
        break;
    }

    if (quit_closure_for_fetch_event_)
      std::move(quit_closure_for_fetch_event_).Run();
  }

 private:
  enum class ResponseMode {
    kDefault,
    kDispatchAfter1sDelay,
    kBlob,
    kStream,
    kFallbackResponse,
    kErrorResponse,
    kFailFetchEventDispatch,
    kDeferredResponse,
    kEarlyResponse,
    kRedirect,
    kHeaders
  };

  const raw_ptr<BrowserTaskEnvironment> task_environment_;

  ResponseMode response_mode_ = ResponseMode::kDefault;
  scoped_refptr<network::ResourceRequestBody> request_body_;

  // For ResponseMode::kBlob.
  blink::mojom::SerializedBlobPtr blob_body_;

  // For ResponseMode::kStream.
  blink::mojom::ServiceWorkerStreamHandlePtr stream_handle_;

  // For ResponseMode::kEarlyResponse and kDeferredResponse.
  blink::mojom::ServiceWorker::DispatchFetchEventForMainResourceCallback
      finish_callback_;
  mojo::Remote<blink::mojom::ServiceWorkerFetchResponseCallback>
      response_callback_;

  // For ResponseMode::kRedirect.
  GURL redirected_url_;

  // For ResponseMode::kHeaders
  base::flat_map<std::string, std::string> headers_;

  bool has_received_fetch_event_ = false;
  base::OnceClosure quit_closure_for_fetch_event_;

  const raw_ptr<FakeEmbeddedWorkerInstanceClient>
      embedded_worker_instance_client_;

  network::mojom::FetchResponseSource response_source_ =
      network::mojom::FetchResponseSource::kUnspecified;

  std::string cache_storage_cache_name_;
  base::Time response_time_;
};

// Returns typical response info for a resource load that went through a service
// worker.
network::mojom::URLResponseHeadPtr CreateResponseInfoFromServiceWorker() {
  auto head = network::mojom::URLResponseHead::New();
  head->was_fetched_via_service_worker = true;
  head->url_list_via_service_worker = std::vector<GURL>();
  head->response_type = network::mojom::FetchResponseType::kDefault;
  head->cache_storage_cache_name = std::string();
  head->did_service_worker_navigation_preload = false;
  head->initial_service_worker_status =
      network::mojom::ServiceWorkerStatus::kRunning;
  return head;
}

const char kHistogramMainResourceFetchEvent[] =
    "ServiceWorker.FetchEvent.MainResource.Status";

// ServiceWorkerMainResourceLoaderTest is for testing the handling of requests
// by a service worker via ServiceWorkerMainResourceLoader.
//
// Of course, no actual service worker runs in the unit test, it is simulated
// via EmbeddedWorkerTestHelper receiving IPC messages from the browser and
// responding as if a service worker is running in the renderer.
class ServiceWorkerMainResourceLoaderTest : public testing::Test {
 public:
  ServiceWorkerMainResourceLoaderTest()
      : task_environment_(BrowserTaskEnvironment::IO_MAINLOOP,
                          base::test::TaskEnvironment::TimeSource::MOCK_TIME) {}
  ~ServiceWorkerMainResourceLoaderTest() override = default;

  void SetUp() override {
    helper_ = std::make_unique<EmbeddedWorkerTestHelper>(base::FilePath());

    // Create an active service worker.
    blink::mojom::ServiceWorkerRegistrationOptions options;
    options.scope = GURL("https://example.com/");
    registration_ = CreateNewServiceWorkerRegistration(
        helper_->context()->registry(), options,
        blink::StorageKey::CreateFirstParty(
            url::Origin::Create(options.scope)));
    version_ = CreateNewServiceWorkerVersion(
        helper_->context()->registry(), registration_.get(),
        GURL("https://example.com/service_worker.js"),
        blink::mojom::ScriptType::kClassic);
    std::vector<storage::mojom::ServiceWorkerResourceRecordPtr> records;
    records.push_back(WriteToDiskCacheSync(
        GetStorageControl(), version_->script_url(), {} /* headers */,
        "I'm the body", "I'm the meta data"));
    version_->script_cache_map()->SetResources(records);
    version_->set_fetch_handler_type(
        ServiceWorkerVersion::FetchHandlerType::kNotSkippable);
    version_->SetStatus(ServiceWorkerVersion::ACTIVATED);
    PolicyContainerPolicies policies;
    policies.ip_address_space = network::mojom::IPAddressSpace::kPrivate;
    version_->set_policy_container_host(
        base::MakeRefCounted<PolicyContainerHost>(std::move(policies)));
    registration_->SetActiveVersion(version_);

    // Make the registration findable via storage functions.
    registration_->set_last_update_check(base::Time::Now());
    std::optional<blink::ServiceWorkerStatusCode> status;
    base::RunLoop run_loop;
    registry()->StoreRegistration(
        registration_.get(), version_.get(),
        ReceiveServiceWorkerStatus(&status, run_loop.QuitClosure()));
    run_loop.Run();
    ASSERT_EQ(blink::ServiceWorkerStatusCode::kOk, status.value());

    // Set up custom fakes to let tests customize how to respond to fetch
    // events.
    auto* client =
        helper_->AddNewPendingInstanceClient<FakeEmbeddedWorkerInstanceClient>(
            helper_.get());
    service_worker_ =
        helper_->AddNewPendingServiceWorker<FetchEventServiceWorker>(
            helper_.get(), client, &task_environment_);

    // Wait for main script response is set to |version| because
    // ServiceWorkerMainResourceLoader needs the main script response to
    // create a response. The main script response is set when the first
    // TransferInstalledScript().
    {
      base::RunLoop loop;
      version_->StartWorker(
          ServiceWorkerMetrics::EventType::UNKNOWN,
          ReceiveServiceWorkerStatus(&status, loop.QuitClosure()));
      loop.Run();
      ASSERT_EQ(blink::ServiceWorkerStatusCode::kOk, status.value());
      service_worker_->WaitForTransferInstalledScript();
    }
  }

  ServiceWorkerRegistry* registry() { return helper_->context()->registry(); }
  mojo::Remote<storage::mojom::ServiceWorkerStorageControl>&
  GetStorageControl() {
    return helper_->context()->GetStorageControl();
  }

  // Starts a request. After calling this, the request is ongoing and the
  // caller can use functions like client_.RunUntilComplete() to wait for
  // completion.
  void StartRequest(std::unique_ptr<network::ResourceRequest> request) {
    // Create a ServiceWorkerClient and simulate what
    // ServiceWorkerControlleeRequestHandler does to assign it a controller.
    if (!service_worker_client_) {
      service_worker_client_ = std::make_unique<ScopedServiceWorkerClient>(
          CreateServiceWorkerClient(helper_->context(), request->url));
      service_worker_client()->AddMatchingRegistration(registration_.get());
      service_worker_client()->SetControllerRegistration(
          registration_, /*notify_controllerchange=*/false);
    }

    // Create a ServiceWorkerMainResourceLoader.
    loader_ = std::make_unique<ServiceWorkerMainResourceLoader>(
        base::BindOnce(&ServiceWorkerMainResourceLoaderTest::Fallback,
                       base::Unretained(this)),
        /*fetch_event_client_id=*/"", service_worker_client()->AsWeakPtr(),
        FrameTreeNodeId(),
        /*find_registration_start_time=*/base::TimeTicks::Now());

    // Load |request.url|.
    loader_->StartRequest(*request, loader_remote_.BindNewPipeAndPassReceiver(),
                          client_.CreateRemote());
  }

  // The |fallback_callback| passed to the ServiceWorkerMainResourceLoader in
  // StartRequest().
  void Fallback(ResponseHeadUpdateParams) {
    did_call_fallback_callback_ = true;
    if (quit_closure_for_fallback_callback_)
      std::move(quit_closure_for_fallback_callback_).Run();
  }

  // Runs until the ServiceWorkerMainResourceLoader created in StartRequest()
  // calls the |fallback_callback| given to it. The argument passed to
  // |fallback_callback| is saved in |reset_subresurce_loader_params_|.
  void RunUntilFallbackCallback() {
    if (did_call_fallback_callback_)
      return;
    base::RunLoop run_loop;
    quit_closure_for_fallback_callback_ = run_loop.QuitClosure();
    run_loop.Run();
  }

  void ExpectResponseInfo(
      const network::mojom::URLResponseHead& info,
      const network::mojom::URLResponseHead& expected_info) {
    EXPECT_EQ(expected_info.was_fetched_via_service_worker,
              info.was_fetched_via_service_worker);
    EXPECT_EQ(expected_info.url_list_via_service_worker,
              info.url_list_via_service_worker);
    EXPECT_EQ(expected_info.response_type, info.response_type);
    EXPECT_EQ(expected_info.response_time, info.response_time);
    EXPECT_FALSE(info.load_timing.service_worker_start_time.is_null());
    EXPECT_FALSE(info.load_timing.service_worker_ready_time.is_null());
    EXPECT_FALSE(info.load_timing.service_worker_fetch_start.is_null());
    EXPECT_FALSE(
        info.load_timing.service_worker_respond_with_settled.is_null());
    EXPECT_LE(info.load_timing.service_worker_start_time,
              info.load_timing.service_worker_ready_time);
    EXPECT_LE(info.load_timing.service_worker_ready_time,
              info.load_timing.service_worker_fetch_start);
    EXPECT_LE(info.load_timing.service_worker_fetch_start,
              info.load_timing.service_worker_respond_with_settled);
    EXPECT_EQ(expected_info.service_worker_response_source,
              info.service_worker_response_source);
    EXPECT_EQ(expected_info.cache_storage_cache_name,
              info.cache_storage_cache_name);
    EXPECT_EQ(expected_info.did_service_worker_navigation_preload,
              info.did_service_worker_navigation_preload);
    EXPECT_EQ(expected_info.initial_service_worker_status,
              info.initial_service_worker_status);
    // TODO(crbug.com/40944544): Write tests about Static Routing API, in
    // particular, checking the correctness of `service_worker_router_info`.
  }

  std::unique_ptr<network::ResourceRequest> CreateRequest() {
    std::unique_ptr<network::ResourceRequest> request =
        std::make_unique<network::ResourceRequest>();
    request->url = GURL("https://example.com/");
    request->method = "GET";
    request->mode = network::mojom::RequestMode::kNavigate;
    request->credentials_mode = network::mojom::CredentialsMode::kInclude;
    request->redirect_mode = network::mojom::RedirectMode::kManual;
    request->destination = network::mojom::RequestDestination::kDocument;
    return request;
  }

  bool HasWorkInBrowser(ServiceWorkerVersion* version) const {
    return version->HasWorkInBrowser();
  }

 protected:
  ServiceWorkerClient* service_worker_client() const {
    return service_worker_client_->get();
  }

  BrowserTaskEnvironment task_environment_;
  std::unique_ptr<EmbeddedWorkerTestHelper> helper_;
  scoped_refptr<ServiceWorkerRegistration> registration_;
  scoped_refptr<ServiceWorkerVersion> version_;
  raw_ptr<FetchEventServiceWorker> service_worker_;
  storage::BlobStorageContext blob_context_;
  network::TestURLLoaderClient client_;
  std::unique_ptr<ServiceWorkerMainResourceLoader> loader_;
  mojo::Remote<network::mojom::URLLoader> loader_remote_;
  std::unique_ptr<ScopedServiceWorkerClient> service_worker_client_;

  bool did_call_fallback_callback_ = false;
  base::OnceClosure quit_closure_for_fallback_callback_;
};

TEST_F(ServiceWorkerMainResourceLoaderTest, Basic) {
  base::HistogramTester histogram_tester;

  // Perform the request.
  StartRequest(CreateRequest());
  client_.RunUntilComplete();

  EXPECT_EQ(net::OK, client_.completion_status().error_code);
  auto& info = client_.response_head();
  EXPECT_EQ(200, info->headers->response_code());
  EXPECT_FALSE(info->load_timing.receive_headers_start.is_null());
  EXPECT_FALSE(info->load_timing.receive_headers_end.is_null());
  EXPECT_LE(info->load_timing.receive_headers_start,
            info->load_timing.receive_headers_end);
  EXPECT_TRUE(info->was_fetched_via_service_worker);
  EXPECT_EQ(info->client_address_space,
            network::mojom::IPAddressSpace::kPrivate);
  ExpectResponseInfo(*info, *CreateResponseInfoFromServiceWorker());

  histogram_tester.ExpectUniqueSample(kHistogramMainResourceFetchEvent,
                                      blink::ServiceWorkerStatusCode::kOk, 1);

  if (LoaderRecordsTimingMetrics()) {
    histogram_tester.ExpectTotalCount(
        "ServiceWorker.LoadTiming.MainFrame.MainResource."
        "ResponseReceivedToCompleted2",
        1);
  }
}

TEST_F(ServiceWorkerMainResourceLoaderTest, NoActiveWorker) {
  base::HistogramTester histogram_tester;

  // Make a container host without a controller.
  service_worker_client_ =
      std::make_unique<ScopedServiceWorkerClient>(CreateServiceWorkerClient(
          helper_->context(), GURL("https://example.com/")));

  // Perform the request.
  StartRequest(CreateRequest());
  client_.RunUntilComplete();
  EXPECT_EQ(net::ERR_FAILED, client_.completion_status().error_code);

  // No fetch event was dispatched.
  histogram_tester.ExpectTotalCount(kHistogramMainResourceFetchEvent, 0);
  if (LoaderRecordsTimingMetrics()) {
    histogram_tester.ExpectTotalCount(
        "ServiceWorker.LoadTiming.MainFrame.MainResource."
        "StartToForwardServiceWorker",
        0);
  }
}

// Test that the request body is passed to the fetch event.
TEST_F(ServiceWorkerMainResourceLoaderTest, RequestBody) {
  const std::string kData = "hi this is the request body";

  // Create a request with a body.
  auto request_body = base::MakeRefCounted<network::ResourceRequestBody>();
  request_body->AppendBytes(kData.c_str(), kData.length());
  std::unique_ptr<network::ResourceRequest> request = CreateRequest();
  request->method = "POST";
  request->request_body = request_body;

  // This test doesn't use the response to the fetch event, so just have the
  // service worker do the default simple response.
  StartRequest(std::move(request));
  client_.RunUntilComplete();

  // Verify that the request body was passed to the fetch event.
  std::string body;
  service_worker_->ReadRequestBody(&body);
  EXPECT_EQ(kData, body);
}

TEST_F(ServiceWorkerMainResourceLoaderTest, BlobResponse) {
  base::HistogramTester histogram_tester;

  // Construct the blob to respond with.
  const std::string kResponseBody = "Here is sample text for the blob.";
  auto blob_data = std::make_unique<storage::BlobDataBuilder>("blob-id:myblob");
  blob_data->AppendData(kResponseBody);
  std::unique_ptr<storage::BlobDataHandle> blob_handle =
      blob_context_.AddFinishedBlob(std::move(blob_data));

  auto blob = blink::mojom::SerializedBlob::New();
  blob->uuid = blob_handle->uuid();
  blob->size = blob_handle->size();
  storage::BlobImpl::Create(std::move(blob_handle),
                            blob->blob.InitWithNewPipeAndPassReceiver());
  service_worker_->RespondWithBlob(std::move(blob));
  service_worker_->SetResponseSource(
      network::mojom::FetchResponseSource::kCacheStorage);
  std::string cache_name = "v1";
  service_worker_->SetCacheStorageCacheName(cache_name);
  base::Time response_time = base::Time::Now();
  service_worker_->SetResponseTime(response_time);

  // Perform the request.
  StartRequest(CreateRequest());
  client_.RunUntilComplete();

  auto& info = client_.response_head();
  EXPECT_EQ(200, info->headers->response_code());
  auto expected_info = CreateResponseInfoFromServiceWorker();
  expected_info->response_time = response_time;
  expected_info->cache_storage_cache_name = cache_name;
  expected_info->service_worker_response_source =
      network::mojom::FetchResponseSource::kCacheStorage;
  ExpectResponseInfo(*info, *expected_info);
  EXPECT_EQ(33, info->content_length);

  // Test the body.
  std::string body;
  EXPECT_TRUE(client_.response_body().is_valid());
  EXPECT_TRUE(
      mojo::BlockingCopyToString(client_.response_body_release(), &body));
  EXPECT_EQ(kResponseBody, body);
  EXPECT_EQ(net::OK, client_.completion_status().error_code);

  if (LoaderRecordsTimingMetrics()) {
    // Test histogram of reading body.
    histogram_tester.ExpectTotalCount(
        "ServiceWorker.LoadTiming.MainFrame.MainResource."
        "ResponseReceivedToCompleted2",
        1);
  }
}

// Tell the helper to respond with a non-existent Blob.
TEST_F(ServiceWorkerMainResourceLoaderTest, BrokenBlobResponse) {
  base::HistogramTester histogram_tester;

  const std::string kBrokenUUID = "broken_uuid";

  // Create the broken blob.
  std::unique_ptr<storage::BlobDataHandle> blob_handle =
      blob_context_.AddBrokenBlob(kBrokenUUID, "", "",
                                  storage::BlobStatus::ERR_OUT_OF_MEMORY);
  auto blob = blink::mojom::SerializedBlob::New();
  blob->uuid = kBrokenUUID;
  storage::BlobImpl::Create(std::move(blob_handle),
                            blob->blob.InitWithNewPipeAndPassReceiver());
  service_worker_->RespondWithBlob(std::move(blob));

  // Perform the request.
  StartRequest(CreateRequest());

  // We should get a valid response once the headers arrive.
  client_.RunUntilResponseReceived();
  auto& info = client_.response_head();
  EXPECT_EQ(200, info->headers->response_code());
  ExpectResponseInfo(*info, *CreateResponseInfoFromServiceWorker());

  // However, since the blob is broken we should get an error while transferring
  // the body.
  client_.RunUntilComplete();
  EXPECT_EQ(net::ERR_OUT_OF_MEMORY, client_.completion_status().error_code);

  if (LoaderRecordsTimingMetrics()) {
    // Timing histograms shouldn't be recorded on broken response.
    histogram_tester.ExpectTotalCount(
        "ServiceWorker.LoadTiming.MainFrame.MainResource."
        "StartToForwardServiceWorker",
        0);
    histogram_tester.ExpectTotalCount(
        "ServiceWorker.LoadTiming.MainFrame.MainResource."
        "ResponseReceivedToCompleted2",
        0);
  }
}

TEST_F(ServiceWorkerMainResourceLoaderTest, StreamResponse) {
  base::HistogramTester histogram_tester;

  // Construct the Stream to respond with.
  const std::string_view kResponseBody = "Here is sample text for the Stream.";
  mojo::Remote<blink::mojom::ServiceWorkerStreamCallback> stream_callback;
  mojo::ScopedDataPipeProducerHandle producer_handle;
  mojo::ScopedDataPipeConsumerHandle consumer_handle;
  ASSERT_EQ(mojo::CreateDataPipe(nullptr, producer_handle, consumer_handle),
            MOJO_RESULT_OK);
  service_worker_->RespondWithStream(
      stream_callback.BindNewPipeAndPassReceiver(), std::move(consumer_handle));

  // Perform the request.
  StartRequest(CreateRequest());
  client_.RunUntilResponseReceived();

  auto& info = client_.response_head();
  EXPECT_EQ(200, info->headers->response_code());
  ExpectResponseInfo(*info, *CreateResponseInfoFromServiceWorker());

  EXPECT_FALSE(version_->HasNoWork());

  // Write the body stream.
  size_t actually_written_bytes = 0;
  MojoResult mojo_result = producer_handle->WriteData(
      base::as_byte_span(kResponseBody), MOJO_WRITE_DATA_FLAG_NONE,
      actually_written_bytes);
  ASSERT_EQ(MOJO_RESULT_OK, mojo_result);
  EXPECT_EQ(kResponseBody.size(), actually_written_bytes);
  stream_callback->OnCompleted();
  producer_handle.reset();

  client_.RunUntilComplete();
  EXPECT_EQ(net::OK, client_.completion_status().error_code);

  // Test the body.
  std::string response;
  EXPECT_TRUE(client_.response_body().is_valid());
  EXPECT_TRUE(
      mojo::BlockingCopyToString(client_.response_body_release(), &response));
  EXPECT_EQ(kResponseBody, response);

  if (LoaderRecordsTimingMetrics()) {
    // Test histogram of reading body.
    histogram_tester.ExpectTotalCount(
        "ServiceWorker.LoadTiming.MainFrame.MainResource."
        "ResponseReceivedToCompleted2",
        1);
  }
}

// Test when a stream response body is aborted.
TEST_F(ServiceWorkerMainResourceLoaderTest, StreamResponse_Abort) {
  base::HistogramTester histogram_tester;

  // Construct the Stream to respond with.
  const std::string_view kResponseBody = "Here is sample text for the Stream.";
  mojo::Remote<blink::mojom::ServiceWorkerStreamCallback> stream_callback;
  mojo::ScopedDataPipeProducerHandle producer_handle;
  mojo::ScopedDataPipeConsumerHandle consumer_handle;
  ASSERT_EQ(mojo::CreateDataPipe(nullptr, producer_handle, consumer_handle),
            MOJO_RESULT_OK);
  service_worker_->RespondWithStream(
      stream_callback.BindNewPipeAndPassReceiver(), std::move(consumer_handle));

  // Perform the request.
  StartRequest(CreateRequest());
  client_.RunUntilResponseReceived();

  auto& info = client_.response_head();
  EXPECT_EQ(200, info->headers->response_code());
  ExpectResponseInfo(*info, *CreateResponseInfoFromServiceWorker());

  // Start writing the body stream, then abort before finishing.
  size_t actually_written_bytes = 0;
  MojoResult mojo_result = producer_handle->WriteData(
      base::as_byte_span(kResponseBody), MOJO_WRITE_DATA_FLAG_NONE,
      actually_written_bytes);
  ASSERT_EQ(MOJO_RESULT_OK, mojo_result);
  EXPECT_EQ(kResponseBody.size(), actually_written_bytes);
  stream_callback->OnAborted();
  producer_handle.reset();

  client_.RunUntilComplete();
  EXPECT_EQ(net::ERR_ABORTED, client_.completion_status().error_code);

  // Test the body.
  std::string response;
  EXPECT_TRUE(client_.response_body().is_valid());
  EXPECT_TRUE(
      mojo::BlockingCopyToString(client_.response_body_release(), &response));
  EXPECT_EQ(kResponseBody, response);

  if (LoaderRecordsTimingMetrics()) {
    // Timing histograms shouldn't be recorded on abort.
    histogram_tester.ExpectTotalCount(
        "ServiceWorker.LoadTiming.MainFrame.MainResource."
        "StartToForwardServiceWorker",
        0);
    histogram_tester.ExpectTotalCount(
        "ServiceWorker.LoadTiming.MainFrame.MainResource."
        "ResponseReceivedToCompleted2",
        0);
  }
}

// Test when the loader is cancelled while a stream response is being written.
TEST_F(ServiceWorkerMainResourceLoaderTest, StreamResponseAndCancel) {
  base::HistogramTester histogram_tester;

  // Construct the Stream to respond with.
  const std::string_view kResponseBody = "Here is sample text for the Stream.";
  mojo::Remote<blink::mojom::ServiceWorkerStreamCallback> stream_callback;
  mojo::ScopedDataPipeProducerHandle producer_handle;
  mojo::ScopedDataPipeConsumerHandle consumer_handle;
  ASSERT_EQ(mojo::CreateDataPipe(nullptr, producer_handle, consumer_handle),
            MOJO_RESULT_OK);
  service_worker_->RespondWithStream(
      stream_callback.BindNewPipeAndPassReceiver(), std::move(consumer_handle));

  // Perform the request.
  StartRequest(CreateRequest());
  client_.RunUntilResponseReceived();

  auto& info = client_.response_head();
  EXPECT_EQ(200, info->headers->response_code());
  ExpectResponseInfo(*info, *CreateResponseInfoFromServiceWorker());

  // Start writing the body stream, then break the Mojo connection to the loader
  // before finishing.
  size_t actually_written_bytes = 0;
  MojoResult mojo_result = producer_handle->WriteData(
      base::as_byte_span(kResponseBody), MOJO_WRITE_DATA_FLAG_NONE,
      actually_written_bytes);
  ASSERT_EQ(MOJO_RESULT_OK, mojo_result);
  EXPECT_EQ(kResponseBody.size(), actually_written_bytes);
  EXPECT_TRUE(producer_handle.is_valid());
  loader_remote_.reset();
  base::RunLoop().RunUntilIdle();

  // Although ServiceWorkerMainResourceLoader resets its URLLoaderClient pointer
  // on connection error, the URLLoaderClient still exists. In this test, it is
  // |client_| which owns the data pipe, so it's still valid to write data to
  // it.
  mojo_result = producer_handle->WriteData(base::as_byte_span(kResponseBody),
                                           MOJO_WRITE_DATA_FLAG_NONE,
                                           actually_written_bytes);
  // TODO(falken): This should probably be an error.
  EXPECT_EQ(MOJO_RESULT_OK, mojo_result);

  client_.RunUntilComplete();
  EXPECT_EQ(net::ERR_ABORTED, client_.completion_status().error_code);

  if (LoaderRecordsTimingMetrics()) {
    // Timing histograms shouldn't be recorded on cancel.
    histogram_tester.ExpectTotalCount(
        "ServiceWorker.LoadTiming.MainFrame.MainResource."
        "StartToForwardServiceWorker",
        0);
    histogram_tester.ExpectTotalCount(
        "ServiceWorker.LoadTiming.MainFrame.MainResource."
        "ResponseReceivedToCompleted2",
        0);
  }
}

// Test when the service worker responds with network fallback.
// i.e., does not call respondWith().
TEST_F(ServiceWorkerMainResourceLoaderTest, FallbackResponse) {
  base::HistogramTester histogram_tester;
  service_worker_->RespondWithFallback();

  // Perform the request.
  StartRequest(CreateRequest());

  // The fallback callback should be called.
  RunUntilFallbackCallback();

  // The request should not be handled by the loader, but it shouldn't be a
  // failure.
  EXPECT_TRUE(service_worker_client()->controller());
  histogram_tester.ExpectUniqueSample(kHistogramMainResourceFetchEvent,
                                      blink::ServiceWorkerStatusCode::kOk, 1);
  if (LoaderRecordsTimingMetrics()) {
    // Test histogram of network fallback.
    histogram_tester.ExpectTotalCount(
        "ServiceWorker.LoadTiming.MainFrame.MainResource."
        "FetchHandlerEndToFallbackNetwork",
        1);
  }
}

// Test when the service worker rejects the FetchEvent.
TEST_F(ServiceWorkerMainResourceLoaderTest, ErrorResponse) {
  base::HistogramTester histogram_tester;
  service_worker_->RespondWithError();

  // Perform the request.
  StartRequest(CreateRequest());
  client_.RunUntilComplete();
  EXPECT_EQ(net::ERR_FAILED, client_.completion_status().error_code);

  // Event dispatch still succeeded.
  histogram_tester.ExpectUniqueSample(kHistogramMainResourceFetchEvent,
                                      blink::ServiceWorkerStatusCode::kOk, 1);
  if (LoaderRecordsTimingMetrics()) {
    // Timing UMAs shouldn't be recorded when we receive an error response.
    histogram_tester.ExpectTotalCount(
        "ServiceWorker.LoadTiming.MainFrame.MainResource."
        "StartToForwardServiceWorker",
        0);
  }
}

// Test when dispatching the fetch event to the service worker failed.
TEST_F(ServiceWorkerMainResourceLoaderTest, FailFetchDispatch) {
  // This test simulates failure to dispatch the fetch event to the
  // service worker by calling
  // `service_worker_->FailToDispatchFetchEvent()`. But without
  // disabling high priority fetch response callback, request processing
  // comes earlier, and doesn't fail to fetch dispatch.  This test is
  // still valid after introducing HighPriorityFetchResponseCallback.
  ScopedOverrideToDisableHighPriorityFetchResponseCallback
      disable_high_priority_fetch_response_callback;

  base::HistogramTester histogram_tester;
  service_worker_->FailToDispatchFetchEvent();

  // Perform the request.
  StartRequest(CreateRequest());

  // The fallback callback should be called.
  RunUntilFallbackCallback();
  EXPECT_FALSE(service_worker_client()->controller());

  histogram_tester.ExpectUniqueSample(
      kHistogramMainResourceFetchEvent,
      blink::ServiceWorkerStatusCode::kErrorFailed, 1);
  if (LoaderRecordsTimingMetrics()) {
    // Timing UMAs shouldn't be recorded when failed to dispatch an event.
    histogram_tester.ExpectTotalCount(
        "ServiceWorker.LoadTiming.MainFrame.MainResource."
        "StartToForwardServiceWorker",
        0);
  }
}

// Test when the respondWith() promise resolves before the waitUntil() promise
// resolves. The response should be received before the event finishes.
TEST_F(ServiceWorkerMainResourceLoaderTest, EarlyResponse) {
  service_worker_->RespondEarly();

  // Perform the request.
  StartRequest(CreateRequest());
  client_.RunUntilComplete();

  auto& info = client_.response_head();
  EXPECT_EQ(200, info->headers->response_code());
  ExpectResponseInfo(*info, *CreateResponseInfoFromServiceWorker());

  // Although the response was already received, the event remains outstanding
  // until waitUntil() resolves.
  EXPECT_TRUE(HasWorkInBrowser(version_.get()));
  service_worker_->FinishWaitUntil();
  EXPECT_FALSE(HasWorkInBrowser(version_.get()));
}

// Test responding to the fetch event with a redirect response.
TEST_F(ServiceWorkerMainResourceLoaderTest, Redirect) {
  base::HistogramTester histogram_tester;
  GURL new_url("https://example.com/redirected");
  service_worker_->RespondWithRedirectResponse(new_url);

  // Perform the request.
  StartRequest(CreateRequest());
  client_.RunUntilRedirectReceived();

  auto& info = client_.response_head();
  EXPECT_EQ(301, info->headers->response_code());
  ExpectResponseInfo(*info, *CreateResponseInfoFromServiceWorker());

  const net::RedirectInfo& redirect_info = client_.redirect_info();
  EXPECT_EQ(301, redirect_info.status_code);
  EXPECT_EQ("GET", redirect_info.new_method);
  EXPECT_EQ(new_url, redirect_info.new_url);

  histogram_tester.ExpectUniqueSample(kHistogramMainResourceFetchEvent,
                                      blink::ServiceWorkerStatusCode::kOk, 1);
}

TEST_F(ServiceWorkerMainResourceLoaderTest, Lifetime) {
  StartRequest(CreateRequest());
  base::WeakPtr<ServiceWorkerMainResourceLoader> loader = loader_->AsWeakPtr();
  ASSERT_TRUE(loader);

  client_.RunUntilComplete();
  EXPECT_TRUE(loader);

  // Even after calling DetachedFromRequest(), |loader_| should be alive until
  // the Mojo connection to the loader is disconnected.
  loader_.release()->DetachedFromRequest();
  EXPECT_TRUE(loader);

  // When the remote for |loader_| is disconnected, its weak pointers (|loader|)
  // are invalidated.
  loader_remote_.reset();
  base::RunLoop().RunUntilIdle();
  EXPECT_FALSE(loader);

  // |loader_| is deleted here. LSan test will alert if it leaks.
}

TEST_F(ServiceWorkerMainResourceLoaderTest, ConnectionErrorDuringFetchEvent) {
  service_worker_->DeferResponse();
  StartRequest(CreateRequest());

  // Wait for the fetch event to be dispatched.
  service_worker_->RunUntilFetchEvent();

  // Break the Mojo connection. The loader should return an aborted status.
  loader_remote_.reset();
  client_.RunUntilComplete();
  EXPECT_EQ(net::ERR_ABORTED, client_.completion_status().error_code);

  // The loader is still alive. Finish the fetch event. It shouldn't crash or
  // call any callbacks on |client_|, which would throw an error.
  service_worker_->FinishRespondWith();

  // There's no event to wait for, so just pump the message loop and the test
  // passes if there is no error or crash.
  base::RunLoop().RunUntilIdle();
}

TEST_F(ServiceWorkerMainResourceLoaderTest, CancelNavigationDuringFetchEvent) {
  // This test simulates failure by resetting ServiceWorkerClient.  But without
  // disabling HighPriorityFetchResponseCallback,
  // `Release()` comes later than
  // request processing, and doesn't cancel navigation during the fetch
  // event.  This test is still valid after introducing
  // HighPriorityFetchResponseCallback.
  ScopedOverrideToDisableHighPriorityFetchResponseCallback
      disable_high_priority_fetch_response_callback;

  StartRequest(CreateRequest());

  // Delete the container host during the request. The load should abort without
  // crashing.
  service_worker_client_.reset();
  base::RunLoop().RunUntilIdle();

  client_.RunUntilComplete();
  EXPECT_EQ(net::ERR_ABORTED, client_.completion_status().error_code);
}

TEST_F(ServiceWorkerMainResourceLoaderTest, TimingInfo) {
  service_worker_->DispatchAfter1sDelay();

  // Perform the request.
  StartRequest(CreateRequest());
  client_.RunUntilComplete();

  // The response header's timing is recorded appropriately.
  auto& info = client_.response_head();
  EXPECT_EQ(200, info->headers->response_code());
  ExpectResponseInfo(*info, *CreateResponseInfoFromServiceWorker());
  EXPECT_EQ(base::Seconds(1), info->load_timing.service_worker_ready_time -
                                  info->load_timing.service_worker_start_time);
  EXPECT_EQ(base::Seconds(1), info->load_timing.service_worker_fetch_start -
                                  info->load_timing.service_worker_start_time);
  EXPECT_EQ(base::Seconds(1),
            info->load_timing.service_worker_respond_with_settled -
                info->load_timing.service_worker_start_time);
}

TEST_F(ServiceWorkerMainResourceLoaderTest, FencedFrameNavigationPreload) {
  registration_->EnableNavigationPreload(true);

  std::unique_ptr<network::ResourceRequest> request = CreateRequest();
  request->destination = network::mojom::RequestDestination::kFencedframe;

  // Perform the request.
  StartRequest(std::move(request));
  client_.RunUntilComplete();

  EXPECT_EQ(net::OK, client_.completion_status().error_code);
  const auto& info = client_.response_head();
  EXPECT_EQ(200, info->headers->response_code());
  EXPECT_FALSE(info->load_timing.receive_headers_start.is_null());
  EXPECT_FALSE(info->load_timing.receive_headers_end.is_null());
  EXPECT_LE(info->load_timing.receive_headers_start,
            info->load_timing.receive_headers_end);
  auto expected_info = CreateResponseInfoFromServiceWorker();
  expected_info->did_service_worker_navigation_preload = true;
  ExpectResponseInfo(*info, *expected_info);
}

}  // namespace service_worker_main_resource_loader_unittest
}  // namespace content