src/chrome/test/data/extensions/api_test/file_system/retain_entry/test_util.js

   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 // This is a duplicate of the file test_util in
   6 // chrome/test/data/extensions/api_test/file_system
   7
   8 function checkEntry(entry, expectedName, isNew, shouldBeWritable) {
   9   chrome.test.assertEq(expectedName, entry.name);
  10   // Test that the file can be read.
  11   entry.file(chrome.test.callback(function(file) {
  12     var reader = new FileReader();
  13     reader.onloadend = chrome.test.callbackPass(function(e) {
  14       if (isNew)
  15         chrome.test.assertEq(reader.result, "");
  16       else
  17         chrome.test.assertEq(reader.result.indexOf("Can you see me?"), 0);
  18       // Test that we can write to the file, or not, depending on
  19       // |shouldBeWritable|.
  20       entry.createWriter(function(fileWriter) {
  21         fileWriter.onwriteend = chrome.test.callback(function(e) {
  22           if (fileWriter.error) {
  23             if (shouldBeWritable) {
  24               chrome.test.fail("Error writing to file: " +
  25                                fileWriter.error.toString());
  26             } else {
  27               chrome.test.succeed();
  28             }
  29           } else {
  30             if (shouldBeWritable) {
  31               // Get a new entry and check the data got to disk.
  32               chrome.fileSystem.chooseEntry(chrome.test.callbackPass(
  33                   function(readEntry) {
  34                 readEntry.file(chrome.test.callback(function(readFile) {
  35                   var readReader = new FileReader();
  36                   readReader.onloadend = function(e) {
  37                     chrome.test.assertEq(readReader.result.indexOf("HoHoHo!"),
  38                                          0);
  39                     chrome.test.succeed();
  40                   };
  41                   readReader.onerror = function(e) {
  42                     chrome.test.fail("Failed to read file after write.");
  43                   };
  44                   readReader.readAsText(readFile);
  45                 }));
  46               }));
  47             } else {
  48               chrome.test.fail(
  49                  "'Could write to file that should not be writable.");
  50             }
  51           }
  52         });
  53         var blob = new Blob(["HoHoHo!"], {type: "text/plain"});
  54         fileWriter.write(blob);
  55       });
  56     });
  57     reader.onerror = chrome.test.callback(function(e) {
  58       chrome.test.fail("Error reading file contents.");
  59     });
  60     reader.readAsText(file);
  61   }));
  62 }