src/chrome/test/data/extensions/api_test/file_system_provider/truncate/test.js

   1 // Copyright 2014 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 'use strict';
   6
   7 /**
   8  * @type {string}
   9  * @const
  10  */
  11 var TESTING_TIRAMISU_FILE_NAME = 'tiramisu.txt';
  12
  13 /**
  14  * Requests truncating a file to the specified length.
  15  *
  16  * @param {TruncateRequestedOptions} options Options.
  17  * @param {function()} onSuccess Success callback.
  18  * @param {function(string)} onError Error callback.
  19  */
  20 function onTruncateRequested(options, onSuccess, onError) {
  21   if (options.fileSystemId != test_util.FILE_SYSTEM_ID) {
  22     onError('SECURITY');  // enum ProviderError.
  23     return;
  24   }
  25
  26   if (!(options.filePath in test_util.defaultMetadata)) {
  27     onError('INVALID_OPERATION');  // enum ProviderError.
  28     return;
  29   }
  30
  31   var metadata = test_util.defaultMetadata[options.filePath];
  32
  33   // Truncating beyond the end of the file.
  34   if (options.length > metadata.size) {
  35     onError('INVALID_OPERATION');
  36     return;
  37   }
  38
  39   metadata.size = options.length;
  40   onSuccess();
  41 }
  42
  43 /**
  44  * Sets up the tests. Called once per all test cases. In case of a failure,
  45  * the callback is not called.
  46  *
  47  * @param {function()} callback Success callback.
  48  */
  49 function setUp(callback) {
  50   chrome.fileSystemProvider.onGetMetadataRequested.addListener(
  51       test_util.onGetMetadataRequestedDefault);
  52   chrome.fileSystemProvider.onOpenFileRequested.addListener(
  53       test_util.onOpenFileRequested);
  54   chrome.fileSystemProvider.onCloseFileRequested.addListener(
  55       test_util.onCloseFileRequested);
  56   chrome.fileSystemProvider.onCreateFileRequested.addListener(
  57       test_util.onCreateFileRequested);
  58
  59   test_util.defaultMetadata['/' + TESTING_TIRAMISU_FILE_NAME] = {
  60     isDirectory: false,
  61     name: TESTING_TIRAMISU_FILE_NAME,
  62     size: 128,
  63     modificationTime: new Date(2014, 1, 24, 6, 35, 11)
  64   };
  65
  66   chrome.fileSystemProvider.onTruncateRequested.addListener(
  67       onTruncateRequested);
  68
  69   test_util.mountFileSystem(callback);
  70 }
  71
  72 /**
  73  * Runs all of the test cases, one by one.
  74  */
  75 function runTests() {
  76   chrome.test.runTests([
  77     // Truncate a file. It should succeed.
  78     function truncateFileSuccess() {
  79       test_util.fileSystem.root.getFile(
  80           TESTING_TIRAMISU_FILE_NAME,
  81           {create: false, exclusive: true},
  82           chrome.test.callbackPass(function(fileEntry) {
  83             fileEntry.createWriter(
  84                 chrome.test.callbackPass(function(fileWriter) {
  85                   fileWriter.onwriteend = chrome.test.callbackPass(function(e) {
  86                     // Note that onwriteend() is called even if an error
  87                     // happened.
  88                     if (fileWriter.error)
  89                       return;
  90                     chrome.test.assertEq(
  91                         64,
  92                         test_util.defaultMetadata[
  93                             '/' + TESTING_TIRAMISU_FILE_NAME].size);
  94                   });
  95                   fileWriter.onerror = function(e) {
  96                     chrome.test.fail(fileWriter.error.name);
  97                   };
  98                   fileWriter.truncate(64);
  99                 }),
 100                 function(error) {
 101                   chrome.test.fail(error.name);
 102                 });
 103           }),
 104           function(error) {
 105             chrome.test.fail(error.name);
 106           });
 107     },
 108
 109     // Truncate a file to a length larger than size. This should result in an
 110     // error.
 111     function truncateBeyondFileError() {
 112       test_util.fileSystem.root.getFile(
 113           TESTING_TIRAMISU_FILE_NAME,
 114           {create: false, exclusive: false},
 115           chrome.test.callbackPass(function(fileEntry) {
 116             fileEntry.createWriter(
 117                 chrome.test.callbackPass(function(fileWriter) {
 118                   fileWriter.onwriteend = chrome.test.callbackPass(function(e) {
 119                     if (fileWriter.error)
 120                       return;
 121                     chrome.test.fail(
 122                         'Unexpectedly succeeded to truncate beyond a fiile.');
 123                   });
 124                   fileWriter.onerror = chrome.test.callbackPass(function(e) {
 125                     chrome.test.assertEq(
 126                         'InvalidModificationError', fileWriter.error.name);
 127                   });
 128                   fileWriter.truncate(test_util.defaultMetadata[
 129                       '/' + TESTING_TIRAMISU_FILE_NAME].size * 2);
 130                 }),
 131                 function(error) {
 132                   chrome.test.fail();
 133                 });
 134           }),
 135           function(error) {
 136             chrome.test.fail(error.name);
 137           });
 138     }
 139   ]);
 140 }
 141
 142 // Setup and run all of the test cases.
 143 setUp(runTests);