chrome/browser/media_galleries/fileapi/native_media_file_util_unittest.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 #include <set>
   6 #include <string>
   7
   8 #include "base/bind.h"
   9 #include "base/files/file_util.h"
  10 #include "base/files/scoped_temp_dir.h"
  11 #include "base/format_macros.h"
  12 #include "base/message_loop/message_loop.h"
  13 #include "base/message_loop/message_loop_proxy.h"
  14 #include "base/strings/stringprintf.h"
  15 #include "base/time/time.h"
  16 #include "chrome/browser/media_galleries/fileapi/media_file_system_backend.h"
  17 #include "chrome/browser/media_galleries/fileapi/native_media_file_util.h"
  18 #include "content/public/test/mock_special_storage_policy.h"
  19 #include "content/public/test/test_browser_thread.h"
  20 #include "content/public/test/test_file_system_options.h"
  21 #include "storage/browser/fileapi/external_mount_points.h"
  22 #include "storage/browser/fileapi/file_system_backend.h"
  23 #include "storage/browser/fileapi/file_system_context.h"
  24 #include "storage/browser/fileapi/file_system_operation_runner.h"
  25 #include "storage/browser/fileapi/file_system_url.h"
  26 #include "storage/browser/fileapi/isolated_context.h"
  27 #include "storage/browser/fileapi/native_file_util.h"
  28 #include "testing/gtest/include/gtest/gtest.h"
  29
  30 #define FPL(x) FILE_PATH_LITERAL(x)
  31
  32 using storage::FileSystemOperation;
  33 using storage::FileSystemURL;
  34
  35 namespace {
  36
  37 typedef FileSystemOperation::FileEntryList FileEntryList;
  38
  39 struct FilteringTestCase {
  40   const base::FilePath::CharType* path;
  41   bool is_directory;
  42   bool visible;
  43   bool media_file;
  44   const char* content;
  45 };
  46
  47 const FilteringTestCase kFilteringTestCases[] = {
  48   // Directory should always be visible.
  49   { FPL("hoge"), true, true, false, NULL },
  50   { FPL("fuga.jpg"), true, true, false, NULL },
  51   { FPL("piyo.txt"), true, true, false, NULL },
  52   { FPL("moga.cod"), true, true, false, NULL },
  53
  54   // File should be visible if it's a supported media file.
  55   // File without extension.
  56   { FPL("foo"), false, false, false, "abc" },
  57   // Supported media file.
  58   { FPL("bar.jpg"), false, true, true, "\xFF\xD8\xFF" },
  59   // Unsupported masquerading file.
  60   { FPL("sna.jpg"), false, true, false, "abc" },
  61   // Non-media file.
  62   { FPL("baz.txt"), false, false, false, "abc" },
  63   // Unsupported media file.
  64   { FPL("foobar.cod"), false, false, false, "abc" },
  65 };
  66
  67 void ExpectEqHelper(const std::string& test_name,
  68                     base::File::Error expected,
  69                     base::File::Error actual) {
  70   EXPECT_EQ(expected, actual) << test_name;
  71 }
  72
  73 void ExpectMetadataEqHelper(const std::string& test_name,
  74                             base::File::Error expected,
  75                             bool expected_is_directory,
  76                             base::File::Error actual,
  77                             const base::File::Info& file_info) {
  78   EXPECT_EQ(expected, actual) << test_name;
  79   if (actual == base::File::FILE_OK)
  80     EXPECT_EQ(expected_is_directory, file_info.is_directory) << test_name;
  81 }
  82
  83 void DidReadDirectory(std::set<base::FilePath::StringType>* content,
  84                       bool* completed,
  85                       base::File::Error error,
  86                       const FileEntryList& file_list,
  87                       bool has_more) {
  88   EXPECT_TRUE(!*completed);
  89   *completed = !has_more;
  90   for (FileEntryList::const_iterator itr = file_list.begin();
  91        itr != file_list.end(); ++itr)
  92     EXPECT_TRUE(content->insert(itr->name).second);
  93 }
  94
  95 void PopulateDirectoryWithTestCases(const base::FilePath& dir,
  96                                     const FilteringTestCase* test_cases,
  97                                     size_t n) {
  98   for (size_t i = 0; i < n; ++i) {
  99     base::FilePath path = dir.Append(test_cases[i].path);
 100     if (test_cases[i].is_directory) {
 101       ASSERT_TRUE(base::CreateDirectory(path));
 102     } else {
 103       ASSERT_TRUE(test_cases[i].content != NULL);
 104       int len = strlen(test_cases[i].content);
 105       ASSERT_EQ(len, base::WriteFile(path, test_cases[i].content, len));
 106     }
 107   }
 108 }
 109
 110 }  // namespace
 111
 112 class NativeMediaFileUtilTest : public testing::Test {
 113  public:
 114   NativeMediaFileUtilTest()
 115       : io_thread_(content::BrowserThread::IO, &message_loop_) {
 116   }
 117
 118   void SetUp() override {
 119     ASSERT_TRUE(data_dir_.CreateUniqueTempDir());
 120     ASSERT_TRUE(base::CreateDirectory(root_path()));
 121
 122     scoped_refptr<storage::SpecialStoragePolicy> storage_policy =
 123         new content::MockSpecialStoragePolicy();
 124
 125     ScopedVector<storage::FileSystemBackend> additional_providers;
 126     additional_providers.push_back(new MediaFileSystemBackend(
 127         data_dir_.path(), base::MessageLoopProxy::current().get()));
 128
 129     file_system_context_ = new storage::FileSystemContext(
 130         base::MessageLoopProxy::current().get(),
 131         base::MessageLoopProxy::current().get(),
 132         storage::ExternalMountPoints::CreateRefCounted().get(),
 133         storage_policy.get(),
 134         NULL,
 135         additional_providers.Pass(),
 136         std::vector<storage::URLRequestAutoMountHandler>(),
 137         data_dir_.path(),
 138         content::CreateAllowFileAccessOptions());
 139
 140     filesystem_id_ = isolated_context()->RegisterFileSystemForPath(
 141         storage::kFileSystemTypeNativeMedia, std::string(), root_path(), NULL);
 142
 143     isolated_context()->AddReference(filesystem_id_);
 144   }
 145
 146   void TearDown() override {
 147     isolated_context()->RemoveReference(filesystem_id_);
 148     file_system_context_ = NULL;
 149   }
 150
 151  protected:
 152   storage::FileSystemContext* file_system_context() {
 153     return file_system_context_.get();
 154   }
 155
 156   FileSystemURL CreateURL(const base::FilePath::CharType* test_case_path) {
 157     return file_system_context_->CreateCrackedFileSystemURL(
 158         origin(),
 159         storage::kFileSystemTypeIsolated,
 160         GetVirtualPath(test_case_path));
 161   }
 162
 163   storage::IsolatedContext* isolated_context() {
 164     return storage::IsolatedContext::GetInstance();
 165   }
 166
 167   base::FilePath root_path() {
 168     return data_dir_.path().Append(FPL("Media Directory"));
 169   }
 170
 171   base::FilePath GetVirtualPath(
 172       const base::FilePath::CharType* test_case_path) {
 173     return base::FilePath::FromUTF8Unsafe(filesystem_id_).
 174                Append(FPL("Media Directory")).
 175                Append(base::FilePath(test_case_path));
 176   }
 177
 178   GURL origin() {
 179     return GURL("http://example.com");
 180   }
 181
 182   storage::FileSystemType type() { return storage::kFileSystemTypeNativeMedia; }
 183
 184   storage::FileSystemOperationRunner* operation_runner() {
 185     return file_system_context_->operation_runner();
 186   }
 187
 188  private:
 189   base::MessageLoop message_loop_;
 190   content::TestBrowserThread io_thread_;
 191
 192   base::ScopedTempDir data_dir_;
 193   scoped_refptr<storage::FileSystemContext> file_system_context_;
 194
 195   std::string filesystem_id_;
 196
 197   DISALLOW_COPY_AND_ASSIGN(NativeMediaFileUtilTest);
 198 };
 199
 200 TEST_F(NativeMediaFileUtilTest, DirectoryExistsAndFileExistsFiltering) {
 201   PopulateDirectoryWithTestCases(root_path(),
 202                                  kFilteringTestCases,
 203                                  arraysize(kFilteringTestCases));
 204
 205   for (size_t i = 0; i < arraysize(kFilteringTestCases); ++i) {
 206     FileSystemURL url = CreateURL(kFilteringTestCases[i].path);
 207
 208     base::File::Error expectation =
 209         kFilteringTestCases[i].visible ?
 210         base::File::FILE_OK :
 211         base::File::FILE_ERROR_NOT_FOUND;
 212
 213     std::string test_name =
 214         base::StringPrintf("DirectoryExistsAndFileExistsFiltering %" PRIuS, i);
 215     if (kFilteringTestCases[i].is_directory) {
 216       operation_runner()->DirectoryExists(
 217           url, base::Bind(&ExpectEqHelper, test_name, expectation));
 218     } else {
 219       operation_runner()->FileExists(
 220           url, base::Bind(&ExpectEqHelper, test_name, expectation));
 221     }
 222     base::MessageLoop::current()->RunUntilIdle();
 223   }
 224 }
 225
 226 TEST_F(NativeMediaFileUtilTest, ReadDirectoryFiltering) {
 227   PopulateDirectoryWithTestCases(root_path(),
 228                                  kFilteringTestCases,
 229                                  arraysize(kFilteringTestCases));
 230
 231   std::set<base::FilePath::StringType> content;
 232   FileSystemURL url = CreateURL(FPL(""));
 233   bool completed = false;
 234   operation_runner()->ReadDirectory(
 235       url, base::Bind(&DidReadDirectory, &content, &completed));
 236   base::MessageLoop::current()->RunUntilIdle();
 237   EXPECT_TRUE(completed);
 238   EXPECT_EQ(6u, content.size());
 239
 240   for (size_t i = 0; i < arraysize(kFilteringTestCases); ++i) {
 241     base::FilePath::StringType name =
 242         base::FilePath(kFilteringTestCases[i].path).BaseName().value();
 243     std::set<base::FilePath::StringType>::const_iterator found =
 244         content.find(name);
 245     EXPECT_EQ(kFilteringTestCases[i].visible, found != content.end());
 246   }
 247 }
 248
 249 TEST_F(NativeMediaFileUtilTest, CreateDirectoryFiltering) {
 250   // Run the loop twice. The second loop attempts to create directories that are
 251   // pre-existing. Though the result should be the same.
 252   for (int loop_count = 0; loop_count < 2; ++loop_count) {
 253     for (size_t i = 0; i < arraysize(kFilteringTestCases); ++i) {
 254       if (kFilteringTestCases[i].is_directory) {
 255         FileSystemURL root_url = CreateURL(FPL(""));
 256         FileSystemURL url = CreateURL(kFilteringTestCases[i].path);
 257
 258         std::string test_name = base::StringPrintf(
 259             "CreateFileAndCreateDirectoryFiltering run %d, test %" PRIuS,
 260             loop_count, i);
 261         base::File::Error expectation =
 262             kFilteringTestCases[i].visible ?
 263             base::File::FILE_OK :
 264             base::File::FILE_ERROR_SECURITY;
 265         operation_runner()->CreateDirectory(
 266             url, false, false,
 267             base::Bind(&ExpectEqHelper, test_name, expectation));
 268       }
 269       base::MessageLoop::current()->RunUntilIdle();
 270     }
 271   }
 272 }
 273
 274 TEST_F(NativeMediaFileUtilTest, CopySourceFiltering) {
 275   base::FilePath dest_path = root_path().AppendASCII("dest");
 276   FileSystemURL dest_url = CreateURL(FPL("dest"));
 277
 278   // Run the loop twice. The first run has no source files. The second run does.
 279   for (int loop_count = 0; loop_count < 2; ++loop_count) {
 280     if (loop_count == 1) {
 281       PopulateDirectoryWithTestCases(root_path(),
 282                                      kFilteringTestCases,
 283                                      arraysize(kFilteringTestCases));
 284     }
 285     for (size_t i = 0; i < arraysize(kFilteringTestCases); ++i) {
 286       // Always start with an empty destination directory.
 287       // Copying to a non-empty destination directory is an invalid operation.
 288       ASSERT_TRUE(base::DeleteFile(dest_path, true));
 289       ASSERT_TRUE(base::CreateDirectory(dest_path));
 290
 291       FileSystemURL root_url = CreateURL(FPL(""));
 292       FileSystemURL url = CreateURL(kFilteringTestCases[i].path);
 293
 294       std::string test_name = base::StringPrintf(
 295           "CopySourceFiltering run %d test %" PRIuS, loop_count, i);
 296       base::File::Error expectation = base::File::FILE_OK;
 297       if (loop_count == 0 || !kFilteringTestCases[i].visible) {
 298         // If the source does not exist or is not visible.
 299         expectation = base::File::FILE_ERROR_NOT_FOUND;
 300       } else if (!kFilteringTestCases[i].is_directory) {
 301         // Cannot copy a visible file to a directory.
 302         expectation = base::File::FILE_ERROR_INVALID_OPERATION;
 303       }
 304       operation_runner()->Copy(
 305           url,
 306           dest_url,
 307           storage::FileSystemOperation::OPTION_NONE,
 308           storage::FileSystemOperationRunner::CopyProgressCallback(),
 309           base::Bind(&ExpectEqHelper, test_name, expectation));
 310       base::MessageLoop::current()->RunUntilIdle();
 311     }
 312   }
 313 }
 314
 315 TEST_F(NativeMediaFileUtilTest, CopyDestFiltering) {
 316   // Run the loop twice. The first run has no destination files.
 317   // The second run does.
 318   for (int loop_count = 0; loop_count < 2; ++loop_count) {
 319     if (loop_count == 1) {
 320       // Reset the test directory between the two loops to remove old
 321       // directories and create new ones that should pre-exist.
 322       ASSERT_TRUE(base::DeleteFile(root_path(), true));
 323       ASSERT_TRUE(base::CreateDirectory(root_path()));
 324       PopulateDirectoryWithTestCases(root_path(),
 325                                      kFilteringTestCases,
 326                                      arraysize(kFilteringTestCases));
 327     }
 328
 329     // Always create a dummy source data file.
 330     base::FilePath src_path = root_path().AppendASCII("foo.jpg");
 331     FileSystemURL src_url = CreateURL(FPL("foo.jpg"));
 332     static const char kDummyData[] = "dummy";
 333     ASSERT_TRUE(base::WriteFile(src_path, kDummyData, strlen(kDummyData)));
 334
 335     for (size_t i = 0; i < arraysize(kFilteringTestCases); ++i) {
 336       if (loop_count == 0 && kFilteringTestCases[i].is_directory) {
 337         // These directories do not exist in this case, so Copy() will not
 338         // treat them as directories. Thus invalidating these test cases.
 339         continue;
 340       }
 341       FileSystemURL root_url = CreateURL(FPL(""));
 342       FileSystemURL url = CreateURL(kFilteringTestCases[i].path);
 343
 344       std::string test_name = base::StringPrintf(
 345           "CopyDestFiltering run %d test %" PRIuS, loop_count, i);
 346       base::File::Error expectation;
 347       if (loop_count == 0) {
 348         // The destination path is a file here. The directory case has been
 349         // handled above.
 350         // If the destination path does not exist and is not visible, then
 351         // creating it would be a security violation.
 352         expectation =
 353             kFilteringTestCases[i].visible ?
 354             base::File::FILE_OK :
 355             base::File::FILE_ERROR_SECURITY;
 356       } else {
 357         if (!kFilteringTestCases[i].visible) {
 358           // If the destination path exist and is not visible, then to the copy
 359           // operation, it looks like the file needs to be created, which is a
 360           // security violation.
 361           expectation = base::File::FILE_ERROR_SECURITY;
 362         } else if (kFilteringTestCases[i].is_directory) {
 363           // Cannot copy a file to a directory.
 364           expectation = base::File::FILE_ERROR_INVALID_OPERATION;
 365         } else {
 366           // Copying from a file to a visible file that exists is ok.
 367           expectation = base::File::FILE_OK;
 368         }
 369       }
 370       operation_runner()->Copy(
 371           src_url,
 372           url,
 373           storage::FileSystemOperation::OPTION_NONE,
 374           storage::FileSystemOperationRunner::CopyProgressCallback(),
 375           base::Bind(&ExpectEqHelper, test_name, expectation));
 376       base::MessageLoop::current()->RunUntilIdle();
 377     }
 378   }
 379 }
 380
 381 TEST_F(NativeMediaFileUtilTest, MoveSourceFiltering) {
 382   base::FilePath dest_path = root_path().AppendASCII("dest");
 383   FileSystemURL dest_url = CreateURL(FPL("dest"));
 384
 385   // Run the loop twice. The first run has no source files. The second run does.
 386   for (int loop_count = 0; loop_count < 2; ++loop_count) {
 387     if (loop_count == 1) {
 388       PopulateDirectoryWithTestCases(root_path(),
 389                                      kFilteringTestCases,
 390                                      arraysize(kFilteringTestCases));
 391     }
 392     for (size_t i = 0; i < arraysize(kFilteringTestCases); ++i) {
 393       // Always start with an empty destination directory.
 394       // Moving to a non-empty destination directory is an invalid operation.
 395       ASSERT_TRUE(base::DeleteFile(dest_path, true));
 396       ASSERT_TRUE(base::CreateDirectory(dest_path));
 397
 398       FileSystemURL root_url = CreateURL(FPL(""));
 399       FileSystemURL url = CreateURL(kFilteringTestCases[i].path);
 400
 401       std::string test_name = base::StringPrintf(
 402           "MoveSourceFiltering run %d test %" PRIuS, loop_count, i);
 403       base::File::Error expectation = base::File::FILE_OK;
 404       if (loop_count == 0 || !kFilteringTestCases[i].visible) {
 405         // If the source does not exist or is not visible.
 406         expectation = base::File::FILE_ERROR_NOT_FOUND;
 407       } else if (!kFilteringTestCases[i].is_directory) {
 408         // Cannot move a visible file to a directory.
 409         expectation = base::File::FILE_ERROR_INVALID_OPERATION;
 410       }
 411       operation_runner()->Move(
 412           url,
 413           dest_url,
 414           storage::FileSystemOperation::OPTION_NONE,
 415           base::Bind(&ExpectEqHelper, test_name, expectation));
 416       base::MessageLoop::current()->RunUntilIdle();
 417     }
 418   }
 419 }
 420
 421 TEST_F(NativeMediaFileUtilTest, MoveDestFiltering) {
 422   // Run the loop twice. The first run has no destination files.
 423   // The second run does.
 424   for (int loop_count = 0; loop_count < 2; ++loop_count) {
 425     if (loop_count == 1) {
 426       // Reset the test directory between the two loops to remove old
 427       // directories and create new ones that should pre-exist.
 428       ASSERT_TRUE(base::DeleteFile(root_path(), true));
 429       ASSERT_TRUE(base::CreateDirectory(root_path()));
 430       PopulateDirectoryWithTestCases(root_path(),
 431                                      kFilteringTestCases,
 432                                      arraysize(kFilteringTestCases));
 433     }
 434
 435     for (size_t i = 0; i < arraysize(kFilteringTestCases); ++i) {
 436       if (loop_count == 0 && kFilteringTestCases[i].is_directory) {
 437         // These directories do not exist in this case, so Copy() will not
 438         // treat them as directories. Thus invalidating these test cases.
 439         continue;
 440       }
 441
 442       // Create the source file for every test case because it might get moved.
 443       base::FilePath src_path = root_path().AppendASCII("foo.jpg");
 444       FileSystemURL src_url = CreateURL(FPL("foo.jpg"));
 445       static const char kDummyData[] = "dummy";
 446       ASSERT_TRUE(
 447           base::WriteFile(src_path, kDummyData, strlen(kDummyData)));
 448
 449       FileSystemURL root_url = CreateURL(FPL(""));
 450       FileSystemURL url = CreateURL(kFilteringTestCases[i].path);
 451
 452       std::string test_name = base::StringPrintf(
 453           "MoveDestFiltering run %d test %" PRIuS, loop_count, i);
 454       base::File::Error expectation;
 455       if (loop_count == 0) {
 456         // The destination path is a file here. The directory case has been
 457         // handled above.
 458         // If the destination path does not exist and is not visible, then
 459         // creating it would be a security violation.
 460         expectation =
 461             kFilteringTestCases[i].visible ?
 462             base::File::FILE_OK :
 463             base::File::FILE_ERROR_SECURITY;
 464       } else {
 465         if (!kFilteringTestCases[i].visible) {
 466           // If the destination path exist and is not visible, then to the move
 467           // operation, it looks like the file needs to be created, which is a
 468           // security violation.
 469           expectation = base::File::FILE_ERROR_SECURITY;
 470         } else if (kFilteringTestCases[i].is_directory) {
 471           // Cannot move a file to a directory.
 472           expectation = base::File::FILE_ERROR_INVALID_OPERATION;
 473         } else {
 474           // Moving from a file to a visible file that exists is ok.
 475           expectation = base::File::FILE_OK;
 476         }
 477       }
 478       operation_runner()->Move(
 479           src_url,
 480           url,
 481           storage::FileSystemOperation::OPTION_NONE,
 482           base::Bind(&ExpectEqHelper, test_name, expectation));
 483       base::MessageLoop::current()->RunUntilIdle();
 484     }
 485   }
 486 }
 487
 488 TEST_F(NativeMediaFileUtilTest, GetMetadataFiltering) {
 489   // Run the loop twice. The first run has no files. The second run does.
 490   for (int loop_count = 0; loop_count < 2; ++loop_count) {
 491     if (loop_count == 1) {
 492       PopulateDirectoryWithTestCases(root_path(),
 493                                      kFilteringTestCases,
 494                                      arraysize(kFilteringTestCases));
 495     }
 496     for (size_t i = 0; i < arraysize(kFilteringTestCases); ++i) {
 497       FileSystemURL root_url = CreateURL(FPL(""));
 498       FileSystemURL url = CreateURL(kFilteringTestCases[i].path);
 499
 500       std::string test_name = base::StringPrintf(
 501           "GetMetadataFiltering run %d test %" PRIuS, loop_count, i);
 502       base::File::Error expectation = base::File::FILE_OK;
 503       if (loop_count == 0 || !kFilteringTestCases[i].visible) {
 504         // Cannot get metadata from files that do not exist or are not visible.
 505         expectation = base::File::FILE_ERROR_NOT_FOUND;
 506       }
 507       operation_runner()->GetMetadata(
 508           url,
 509           base::Bind(&ExpectMetadataEqHelper,
 510                      test_name,
 511                      expectation,
 512                      kFilteringTestCases[i].is_directory));
 513       base::MessageLoop::current()->RunUntilIdle();
 514     }
 515   }
 516 }
 517
 518 TEST_F(NativeMediaFileUtilTest, RemoveFileFiltering) {
 519   // Run the loop twice. The first run has no files. The second run does.
 520   for (int loop_count = 0; loop_count < 2; ++loop_count) {
 521     if (loop_count == 1) {
 522       PopulateDirectoryWithTestCases(root_path(),
 523                                      kFilteringTestCases,
 524                                      arraysize(kFilteringTestCases));
 525     }
 526     for (size_t i = 0; i < arraysize(kFilteringTestCases); ++i) {
 527       FileSystemURL root_url = CreateURL(FPL(""));
 528       FileSystemURL url = CreateURL(kFilteringTestCases[i].path);
 529
 530       std::string test_name = base::StringPrintf(
 531           "RemoveFiltering run %d test %" PRIuS, loop_count, i);
 532       base::File::Error expectation = base::File::FILE_OK;
 533       if (loop_count == 0 || !kFilteringTestCases[i].visible) {
 534         // Cannot remove files that do not exist or are not visible.
 535         expectation = base::File::FILE_ERROR_NOT_FOUND;
 536       } else if (kFilteringTestCases[i].is_directory) {
 537         expectation = base::File::FILE_ERROR_NOT_A_FILE;
 538       }
 539       operation_runner()->RemoveFile(
 540           url, base::Bind(&ExpectEqHelper, test_name, expectation));
 541       base::MessageLoop::current()->RunUntilIdle();
 542     }
 543   }
 544 }
 545
 546 void CreateSnapshotCallback(
 547     base::File::Error* error,
 548     base::File::Error result,
 549     const base::File::Info&,
 550     const base::FilePath&,
 551     const scoped_refptr<storage::ShareableFileReference>&) {
 552   *error = result;
 553 }
 554
 555 TEST_F(NativeMediaFileUtilTest, CreateSnapshot) {
 556   PopulateDirectoryWithTestCases(root_path(),
 557                                  kFilteringTestCases,
 558                                  arraysize(kFilteringTestCases));
 559   for (size_t i = 0; i < arraysize(kFilteringTestCases); ++i) {
 560     if (kFilteringTestCases[i].is_directory ||
 561         !kFilteringTestCases[i].visible) {
 562       continue;
 563     }
 564     FileSystemURL root_url = CreateURL(FPL(""));
 565     FileSystemURL url = CreateURL(kFilteringTestCases[i].path);
 566     base::File::Error expected_error, error;
 567     if (kFilteringTestCases[i].media_file)
 568       expected_error = base::File::FILE_OK;
 569     else
 570       expected_error = base::File::FILE_ERROR_SECURITY;
 571     error = base::File::FILE_ERROR_FAILED;
 572     operation_runner()->CreateSnapshotFile(url,
 573         base::Bind(CreateSnapshotCallback, &error));
 574     base::MessageLoop::current()->RunUntilIdle();
 575     ASSERT_EQ(expected_error, error);
 576   }
 577 }