src/ppapi/tests/test_url_request.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4 //
   5 // Tests PPB_URLRequestInfo interface.
   6
   7 #include "ppapi/tests/test_url_request.h"
   8
   9 #include <string.h>
  10 #include <string>
  11
  12 #include "ppapi/c/ppb_file_io.h"
  13 #include "ppapi/cpp/completion_callback.h"
  14 #include "ppapi/cpp/file_io.h"
  15 #include "ppapi/cpp/file_ref.h"
  16 #include "ppapi/cpp/file_system.h"
  17 #include "ppapi/cpp/instance.h"
  18 #include "ppapi/cpp/var.h"
  19 #include "ppapi/tests/test_utils.h"
  20 #include "ppapi/tests/testing_instance.h"
  21
  22 REGISTER_TEST_CASE(URLRequest);
  23
  24 namespace {
  25 // TODO(polina): move these to test_case.h/cc since other NaCl tests use them?
  26
  27 const PP_Resource kInvalidResource = 0;
  28 const PP_Instance kInvalidInstance = 0;
  29
  30 // These should not exist.
  31 // The bottom 2 bits are used to differentiate between different id types.
  32 // 00 - module, 01 - instance, 10 - resource, 11 - var.
  33 const PP_Instance kNotAnInstance = 0xFFFFF0;
  34 const PP_Resource kNotAResource = 0xAAAAA0;
  35 }
  36
  37 TestURLRequest::TestURLRequest(TestingInstance* instance)
  38     : TestCase(instance),
  39       ppb_url_request_interface_(NULL),
  40       ppb_url_loader_interface_(NULL),
  41       ppb_url_response_interface_(NULL),
  42       ppb_core_interface_(NULL),
  43       ppb_var_interface_(NULL),
  44       url_loader_(kInvalidResource) {
  45 }
  46
  47 bool TestURLRequest::Init() {
  48   ppb_url_request_interface_ = static_cast<const PPB_URLRequestInfo*>(
  49       pp::Module::Get()->GetBrowserInterface(PPB_URLREQUESTINFO_INTERFACE));
  50   ppb_url_loader_interface_ = static_cast<const PPB_URLLoader*>(
  51       pp::Module::Get()->GetBrowserInterface(PPB_URLLOADER_INTERFACE));
  52   ppb_url_response_interface_ = static_cast<const PPB_URLResponseInfo*>(
  53       pp::Module::Get()->GetBrowserInterface(PPB_URLRESPONSEINFO_INTERFACE));
  54   ppb_core_interface_ = static_cast<const PPB_Core*>(
  55       pp::Module::Get()->GetBrowserInterface(PPB_CORE_INTERFACE));
  56   ppb_var_interface_ = static_cast<const PPB_Var*>(
  57       pp::Module::Get()->GetBrowserInterface(PPB_VAR_INTERFACE));
  58   if (!ppb_url_request_interface_)
  59     instance_->AppendError("PPB_URLRequestInfo interface not available");
  60   if (!ppb_url_response_interface_)
  61     instance_->AppendError("PPB_URLResponseInfo interface not available");
  62   if (!ppb_core_interface_)
  63     instance_->AppendError("PPB_Core interface not available");
  64   if (!ppb_var_interface_)
  65     instance_->AppendError("PPB_Var interface not available");
  66   if (!ppb_url_loader_interface_) {
  67     instance_->AppendError("PPB_URLLoader interface not available");
  68   } else {
  69     url_loader_ = ppb_url_loader_interface_->Create(instance_->pp_instance());
  70     if (url_loader_ == kInvalidResource)
  71       instance_->AppendError("Failed to create URLLoader");
  72   }
  73   return EnsureRunningOverHTTP();
  74 }
  75
  76 void TestURLRequest::RunTests(const std::string& filter) {
  77   RUN_TEST(CreateAndIsURLRequestInfo, filter);
  78   RUN_TEST(SetProperty, filter);
  79   RUN_TEST(AppendDataToBody, filter);
  80   RUN_TEST(AppendFileToBody, filter);
  81   RUN_TEST(Stress, filter);
  82 }
  83
  84 PP_Var TestURLRequest::PP_MakeString(const char* s) {
  85   return ppb_var_interface_->VarFromUtf8(s, strlen(s));
  86 }
  87
  88 // Tests
  89 //   PP_Resource Create(PP_Instance instance)
  90 //   PP_Bool IsURLRequestInfo(PP_Resource resource)
  91 std::string TestURLRequest::TestCreateAndIsURLRequestInfo() {
  92   // Create: Invalid / non-existent instance -> invalid resource.
  93   ASSERT_EQ(ppb_url_request_interface_->Create(kInvalidInstance),
  94             kInvalidResource);
  95   ASSERT_EQ(ppb_url_request_interface_->Create(kNotAnInstance),
  96             kInvalidResource);
  97
  98   // Create: Valid instance -> valid resource.
  99   PP_Resource url_request = ppb_url_request_interface_->Create(
 100       instance_->pp_instance());
 101   ASSERT_NE(url_request, kInvalidResource);
 102
 103   // IsURLRequestInfo:
 104   // Invalid / non-existent / non-URLRequestInfo resource -> false.
 105   ASSERT_NE(PP_TRUE,
 106             ppb_url_request_interface_->IsURLRequestInfo(kInvalidResource));
 107   ASSERT_NE(PP_TRUE,
 108             ppb_url_request_interface_->IsURLRequestInfo(kNotAResource));
 109   ASSERT_NE(PP_TRUE, ppb_url_request_interface_->IsURLRequestInfo(url_loader_));
 110
 111   // IsURLRequestInfo: Current URLRequestInfo resource -> true.
 112   std::string error;
 113   if (PP_FALSE == ppb_url_request_interface_->IsURLRequestInfo(url_request))
 114     error = "IsURLRequestInfo() failed with a current URLRequestInfo resource";
 115
 116   // IsURLRequestInfo: Released URLRequestInfo resource -> false.
 117   ppb_core_interface_->ReleaseResource(url_request);
 118   ASSERT_NE(PP_TRUE, ppb_url_request_interface_->IsURLRequestInfo(url_request));
 119
 120   return error;  // == PASS() if empty.
 121 }
 122
 123 // Tests
 124 //  PP_Bool SetProperty(PP_Resource request,
 125 //                      PP_URLRequestProperty property,
 126 //                      struct PP_Var value);
 127 std::string TestURLRequest::TestSetProperty() {
 128   struct PropertyTestData {
 129     PropertyTestData(PP_URLRequestProperty prop,
 130                      const std::string& name,
 131                      PP_Var value, PP_Bool expected) :
 132         property(prop), property_name(name),
 133         var(value), expected_value(expected) {
 134       // var has ref count of 1 on creation.
 135     }
 136     PP_URLRequestProperty property;
 137     std::string property_name;
 138     PP_Var var;  // Instance owner is responsible for releasing this var.
 139     PP_Bool expected_value;
 140   };
 141
 142   // All bool properties should accept PP_TRUE and PP_FALSE, while rejecting
 143   // all other variable types.
 144 #define TEST_BOOL(_name)                                              \
 145     PropertyTestData(ID_STR(_name), PP_MakeBool(PP_TRUE), PP_TRUE),   \
 146     PropertyTestData(ID_STR(_name), PP_MakeBool(PP_FALSE), PP_TRUE),  \
 147     PropertyTestData(ID_STR(_name), PP_MakeUndefined(), PP_FALSE),    \
 148     PropertyTestData(ID_STR(_name), PP_MakeNull(), PP_FALSE),         \
 149     PropertyTestData(ID_STR(_name), PP_MakeInt32(0), PP_FALSE),       \
 150     PropertyTestData(ID_STR(_name), PP_MakeDouble(0.0), PP_FALSE)
 151
 152   // These property types are always invalid for string properties.
 153 #define TEST_STRING_INVALID(_name)                                    \
 154     PropertyTestData(ID_STR(_name), PP_MakeNull(), PP_FALSE),         \
 155     PropertyTestData(ID_STR(_name), PP_MakeBool(PP_FALSE), PP_FALSE), \
 156     PropertyTestData(ID_STR(_name), PP_MakeInt32(0), PP_FALSE),       \
 157     PropertyTestData(ID_STR(_name), PP_MakeDouble(0.0), PP_FALSE)
 158
 159 #define TEST_INT_INVALID(_name)                                         \
 160     PropertyTestData(ID_STR(_name), PP_MakeUndefined(), PP_FALSE),      \
 161     PropertyTestData(ID_STR(_name), PP_MakeNull(), PP_FALSE),           \
 162     PropertyTestData(ID_STR(_name), PP_MakeBool(PP_FALSE), PP_FALSE),   \
 163     PropertyTestData(ID_STR(_name), PP_MakeString("notint"), PP_FALSE), \
 164     PropertyTestData(ID_STR(_name), PP_MakeDouble(0.0), PP_FALSE)
 165
 166   // SetProperty accepts plenty of invalid values (malformed urls, negative
 167   // thresholds, etc). Error checking is delayed until request opening (aka url
 168   // loading).
 169 #define ID_STR(arg) arg, #arg
 170     PropertyTestData test_data[] = {
 171       TEST_BOOL(PP_URLREQUESTPROPERTY_STREAMTOFILE),
 172       TEST_BOOL(PP_URLREQUESTPROPERTY_FOLLOWREDIRECTS),
 173       TEST_BOOL(PP_URLREQUESTPROPERTY_RECORDDOWNLOADPROGRESS),
 174       TEST_BOOL(PP_URLREQUESTPROPERTY_RECORDUPLOADPROGRESS),
 175       TEST_BOOL(PP_URLREQUESTPROPERTY_ALLOWCROSSORIGINREQUESTS),
 176       TEST_BOOL(PP_URLREQUESTPROPERTY_ALLOWCREDENTIALS),
 177       TEST_STRING_INVALID(PP_URLREQUESTPROPERTY_URL),
 178       TEST_STRING_INVALID(PP_URLREQUESTPROPERTY_METHOD),
 179       TEST_STRING_INVALID(PP_URLREQUESTPROPERTY_HEADERS),
 180       TEST_STRING_INVALID(PP_URLREQUESTPROPERTY_CUSTOMREFERRERURL),
 181       TEST_STRING_INVALID(PP_URLREQUESTPROPERTY_CUSTOMCONTENTTRANSFERENCODING),
 182       TEST_STRING_INVALID(PP_URLREQUESTPROPERTY_CUSTOMUSERAGENT),
 183       TEST_INT_INVALID(PP_URLREQUESTPROPERTY_PREFETCHBUFFERUPPERTHRESHOLD),
 184       TEST_INT_INVALID(PP_URLREQUESTPROPERTY_PREFETCHBUFFERLOWERTHRESHOLD),
 185       PropertyTestData(ID_STR(PP_URLREQUESTPROPERTY_URL),
 186                        PP_MakeString("http://www.google.com"), PP_TRUE),
 187       PropertyTestData(ID_STR(PP_URLREQUESTPROPERTY_URL),
 188                        PP_MakeString("foo.jpg"), PP_TRUE),
 189       PropertyTestData(ID_STR(PP_URLREQUESTPROPERTY_METHOD),
 190                        PP_MakeString("GET"), PP_TRUE),
 191       PropertyTestData(ID_STR(PP_URLREQUESTPROPERTY_METHOD),
 192                        PP_MakeString("POST"), PP_TRUE),
 193       PropertyTestData(ID_STR(PP_URLREQUESTPROPERTY_HEADERS),
 194                        PP_MakeString("Accept: text/plain"), PP_TRUE),
 195       PropertyTestData(ID_STR(PP_URLREQUESTPROPERTY_HEADERS),
 196                        PP_MakeString(""), PP_TRUE),
 197       PropertyTestData(ID_STR(PP_URLREQUESTPROPERTY_CUSTOMREFERRERURL),
 198                        PP_MakeString("http://www.google.com"), PP_TRUE),
 199       PropertyTestData(ID_STR(PP_URLREQUESTPROPERTY_CUSTOMREFERRERURL),
 200                        PP_MakeString(""), PP_TRUE),
 201       PropertyTestData(ID_STR(PP_URLREQUESTPROPERTY_CUSTOMREFERRERURL),
 202                        PP_MakeUndefined(), PP_TRUE),
 203       PropertyTestData(
 204           ID_STR(PP_URLREQUESTPROPERTY_CUSTOMCONTENTTRANSFERENCODING),
 205           PP_MakeString("base64"), PP_TRUE),
 206       PropertyTestData(
 207           ID_STR(PP_URLREQUESTPROPERTY_CUSTOMCONTENTTRANSFERENCODING),
 208           PP_MakeString(""), PP_TRUE),
 209       PropertyTestData(
 210           ID_STR(PP_URLREQUESTPROPERTY_CUSTOMCONTENTTRANSFERENCODING),
 211           PP_MakeUndefined(), PP_TRUE),
 212       PropertyTestData(
 213           ID_STR(PP_URLREQUESTPROPERTY_CUSTOMUSERAGENT),
 214           PP_MakeString("My Crazy Plugin"), PP_TRUE),
 215       PropertyTestData(
 216           ID_STR(PP_URLREQUESTPROPERTY_CUSTOMUSERAGENT),
 217           PP_MakeString(""), PP_TRUE),
 218       PropertyTestData(
 219           ID_STR(PP_URLREQUESTPROPERTY_CUSTOMUSERAGENT),
 220           PP_MakeUndefined(), PP_TRUE),
 221       PropertyTestData(ID_STR(PP_URLREQUESTPROPERTY_URL),
 222                        PP_MakeUndefined(), PP_FALSE),
 223       PropertyTestData(ID_STR(PP_URLREQUESTPROPERTY_METHOD),
 224                        PP_MakeUndefined(), PP_FALSE),
 225       PropertyTestData(
 226           ID_STR(PP_URLREQUESTPROPERTY_HEADERS),
 227           PP_MakeString("Proxy-Authorization: Basic dXNlcjpwYXNzd29yZA=="),
 228           PP_TRUE),
 229       PropertyTestData(
 230           ID_STR(PP_URLREQUESTPROPERTY_HEADERS),
 231           PP_MakeString("Accept-Encoding: *\n"
 232                         "Accept-Charset: iso-8859-5, unicode-1-1;q=0.8"),
 233           PP_TRUE),
 234       PropertyTestData(
 235           ID_STR(PP_URLREQUESTPROPERTY_PREFETCHBUFFERUPPERTHRESHOLD),
 236           PP_MakeInt32(0), PP_TRUE),
 237       PropertyTestData(
 238           ID_STR(PP_URLREQUESTPROPERTY_PREFETCHBUFFERUPPERTHRESHOLD),
 239           PP_MakeInt32(100), PP_TRUE),
 240       PropertyTestData(
 241           ID_STR(PP_URLREQUESTPROPERTY_PREFETCHBUFFERLOWERTHRESHOLD),
 242           PP_MakeInt32(0), PP_TRUE),
 243       PropertyTestData(
 244           ID_STR(PP_URLREQUESTPROPERTY_PREFETCHBUFFERLOWERTHRESHOLD),
 245           PP_MakeInt32(100), PP_TRUE),
 246       PropertyTestData(ID_STR(PP_URLREQUESTPROPERTY_URL),
 247                        PP_MakeString("::::::::::::"), PP_TRUE),
 248       PropertyTestData(ID_STR(PP_URLREQUESTPROPERTY_METHOD),
 249           PP_MakeString("INVALID"), PP_TRUE),
 250       PropertyTestData(
 251           ID_STR(PP_URLREQUESTPROPERTY_CUSTOMCONTENTTRANSFERENCODING),
 252           PP_MakeString("invalid"), PP_TRUE),
 253       PropertyTestData(
 254           ID_STR(PP_URLREQUESTPROPERTY_PREFETCHBUFFERUPPERTHRESHOLD),
 255           PP_MakeInt32(-100), PP_TRUE),
 256       PropertyTestData(
 257           ID_STR(PP_URLREQUESTPROPERTY_PREFETCHBUFFERLOWERTHRESHOLD),
 258           PP_MakeInt32(-100), PP_TRUE),
 259
 260     };
 261   std::string error;
 262
 263   PP_Resource url_request = ppb_url_request_interface_->Create(
 264       instance_->pp_instance());
 265   if (url_request == kInvalidResource)
 266     error = "Failed to create a URLRequestInfo";
 267
 268   // Loop over all test data even if we encountered an error to release vars.
 269   for (size_t i = 0;
 270        i < sizeof(test_data) / sizeof(test_data[0]);
 271        ++i) {
 272     if (error.empty() && test_data[i].expected_value !=
 273         ppb_url_request_interface_->SetProperty(url_request,
 274                                                 test_data[i].property,
 275                                                 test_data[i].var)) {
 276       pp::Var var(pp::Var::DontManage(), test_data[i].var);
 277       error = std::string("Setting property ") +
 278           test_data[i].property_name + " to " + var.DebugString() +
 279           " did not return " + (test_data[i].expected_value ? "True" : "False");
 280       error = test_data[i].property_name;
 281     }
 282     ppb_var_interface_->Release(test_data[i].var);
 283   }
 284
 285   ppb_core_interface_->ReleaseResource(url_request);
 286   return error;  // == PASS() if empty.
 287 }
 288
 289 std::string TestURLRequest::LoadAndCompareBody(
 290     PP_Resource url_request, const std::string& expected_body) {
 291   TestCompletionCallback callback(instance_->pp_instance(), PP_REQUIRED);
 292   callback.WaitForResult(ppb_url_loader_interface_->Open(
 293       url_loader_, url_request,
 294       callback.GetCallback().pp_completion_callback()));
 295   CHECK_CALLBACK_BEHAVIOR(callback);
 296   ASSERT_EQ(PP_OK, callback.result());
 297
 298   std::string error;
 299   PP_Resource url_response =
 300       ppb_url_loader_interface_->GetResponseInfo(url_loader_);
 301   if (url_response == kInvalidResource) {
 302     error = "PPB_URLLoader::GetResponseInfo() returned invalid resource";
 303   } else {
 304     PP_Var status = ppb_url_response_interface_->GetProperty(
 305         url_response, PP_URLRESPONSEPROPERTY_STATUSCODE);
 306     if (status.type != PP_VARTYPE_INT32 && status.value.as_int != 200)
 307       error = ReportError("PPB_URLLoader::Open() status", status.value.as_int);
 308
 309     std::string actual_body;
 310     for (; error.empty();) {  // Read the entire body in this loop.
 311       const size_t kBufferSize = 32;
 312       char buf[kBufferSize];
 313       callback.WaitForResult(ppb_url_loader_interface_->ReadResponseBody(
 314           url_loader_, buf, kBufferSize,
 315           callback.GetCallback().pp_completion_callback()));
 316       if (callback.failed())
 317         error.assign(callback.errors());
 318       else if (callback.result() < PP_OK)
 319         error.assign(ReportError("PPB_URLLoader::ReadResponseBody()",
 320                                  callback.result()));
 321       if (callback.result() <= PP_OK || callback.failed())
 322         break;
 323       actual_body.append(buf, callback.result());
 324     }
 325     if (actual_body != expected_body)
 326       error = "PPB_URLLoader::ReadResponseBody() read unexpected response.";
 327   }
 328   ppb_core_interface_->ReleaseResource(url_response);
 329
 330   ppb_url_loader_interface_->Close(url_loader_);
 331   return error;
 332 }
 333
 334 // Tests
 335 //   PP_Bool AppendDataToBody(
 336 //       PP_Resource request, const void* data, uint32_t len);
 337 std::string TestURLRequest::TestAppendDataToBody() {
 338   PP_Resource url_request = ppb_url_request_interface_->Create(
 339       instance_->pp_instance());
 340   ASSERT_NE(url_request, kInvalidResource);
 341
 342   std::string postdata("sample postdata");
 343   PP_Var post_string_var = PP_MakeString("POST");
 344   PP_Var echo_string_var = PP_MakeString("/echo");
 345
 346   // NULL pointer causes a crash. In general PPAPI implementation does not
 347   // test for NULL because they are just a special case of bad pointers that
 348   // are not detectable if set to point to an object that does not exist.
 349
 350   // Invalid resource should fail.
 351   ASSERT_EQ(PP_FALSE, ppb_url_request_interface_->AppendDataToBody(
 352       kInvalidResource, postdata.data(), postdata.length()));
 353
 354   // Append data and POST to echoing web server.
 355   ASSERT_EQ(PP_TRUE, ppb_url_request_interface_->SetProperty(
 356       url_request, PP_URLREQUESTPROPERTY_METHOD, post_string_var));
 357   ASSERT_EQ(PP_TRUE, ppb_url_request_interface_->SetProperty(
 358       url_request, PP_URLREQUESTPROPERTY_URL, echo_string_var));
 359
 360   // Append data to body and verify the body is what we expect.
 361   ASSERT_EQ(PP_TRUE, ppb_url_request_interface_->AppendDataToBody(
 362       url_request, postdata.data(), postdata.length()));
 363   std::string error = LoadAndCompareBody(url_request, postdata);
 364
 365   ppb_var_interface_->Release(post_string_var);
 366   ppb_var_interface_->Release(echo_string_var);
 367   ppb_core_interface_->ReleaseResource(url_request);
 368   return error;  // == PASS() if empty.
 369 }
 370
 371 std::string TestURLRequest::TestAppendFileToBody() {
 372   PP_Resource url_request = ppb_url_request_interface_->Create(
 373       instance_->pp_instance());
 374   ASSERT_NE(url_request, kInvalidResource);
 375
 376   TestCompletionCallback callback(instance_->pp_instance(), callback_type());
 377
 378   pp::FileSystem file_system(instance_, PP_FILESYSTEMTYPE_LOCALTEMPORARY);
 379   callback.WaitForResult(file_system.Open(1024, callback.GetCallback()));
 380   CHECK_CALLBACK_BEHAVIOR(callback);
 381   ASSERT_EQ(PP_OK, callback.result());
 382
 383   pp::FileRef ref(file_system, "/test_file");
 384   pp::FileIO io(instance_);
 385   callback.WaitForResult(io.Open(ref,
 386                                  PP_FILEOPENFLAG_CREATE | PP_FILEOPENFLAG_WRITE,
 387                                  callback.GetCallback()));
 388   CHECK_CALLBACK_BEHAVIOR(callback);
 389   ASSERT_EQ(PP_OK, callback.result());
 390
 391   std::string append_data = "hello\n";
 392   callback.WaitForResult(io.Write(0,
 393                                   append_data.c_str(),
 394                                   append_data.size(),
 395                                   callback.GetCallback()));
 396   CHECK_CALLBACK_BEHAVIOR(callback);
 397   ASSERT_EQ(static_cast<int32_t>(append_data.size()), callback.result());
 398
 399   PP_Var post_string_var = PP_MakeString("POST");
 400   PP_Var echo_string_var = PP_MakeString("/echo");
 401
 402   // NULL pointer causes a crash. In general PPAPI implementation does not
 403   // test for NULL because they are just a special case of bad pointers that
 404   // are not detectable if set to point to an object that does not exist.
 405
 406   // Invalid resource should fail.
 407   ASSERT_EQ(PP_FALSE, ppb_url_request_interface_->AppendFileToBody(
 408       kInvalidResource, ref.pp_resource(), 0, -1, 0));
 409
 410   // Append data and POST to echoing web server.
 411   ASSERT_EQ(PP_TRUE, ppb_url_request_interface_->SetProperty(
 412       url_request, PP_URLREQUESTPROPERTY_METHOD, post_string_var));
 413   ASSERT_EQ(PP_TRUE, ppb_url_request_interface_->SetProperty(
 414       url_request, PP_URLREQUESTPROPERTY_URL, echo_string_var));
 415
 416   // Append file to body and verify the body is what we expect.
 417   ASSERT_EQ(PP_TRUE, ppb_url_request_interface_->AppendFileToBody(
 418       url_request, ref.pp_resource(), 0, -1, 0));
 419   std::string error = LoadAndCompareBody(url_request, append_data);
 420
 421   ppb_var_interface_->Release(post_string_var);
 422   ppb_var_interface_->Release(echo_string_var);
 423   ppb_core_interface_->ReleaseResource(url_request);
 424   return error;  // == PASS() if empty.
 425 }
 426
 427 // Allocates and manipulates a large number of resources.
 428 std::string TestURLRequest::TestStress() {
 429   const int kManyResources = 500;
 430   PP_Resource url_request_info[kManyResources];
 431
 432   std::string error;
 433   int num_created = kManyResources;
 434   for (int i = 0; i < kManyResources; i++) {
 435     url_request_info[i] = ppb_url_request_interface_->Create(
 436         instance_->pp_instance());
 437     if (url_request_info[i] == kInvalidResource) {
 438       error = "Create() failed";
 439     } else if (PP_FALSE == ppb_url_request_interface_->IsURLRequestInfo(
 440         url_request_info[i])) {
 441       error = "IsURLRequestInfo() failed";
 442     } else if (PP_FALSE == ppb_url_request_interface_->SetProperty(
 443         url_request_info[i],
 444         PP_URLREQUESTPROPERTY_STREAMTOFILE,
 445         PP_MakeBool(PP_FALSE))) {
 446       error = "SetProperty() failed";
 447     }
 448     if (!error.empty()) {
 449       num_created = i + 1;
 450       break;
 451     }
 452   }
 453   for (int i = 0; i < num_created; i++) {
 454     ppb_core_interface_->ReleaseResource(url_request_info[i]);
 455     if (PP_TRUE ==
 456         ppb_url_request_interface_->IsURLRequestInfo(url_request_info[i]))
 457       error = "IsURLREquestInfo() succeeded after release";
 458   }
 459   return error;  // == PASS() if empty.
 460 }