chrome/test/data/extensions/api_test/file_system/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
  11   // Test that we are writable (or not), as expected.
  12   chrome.fileSystem.isWritableEntry(entry, chrome.test.callbackPass(
  13       function(isWritable) {
  14     chrome.test.assertEq(isWritable, shouldBeWritable);
  15   }));
  16
  17   // Test that the file can be read.
  18   entry.file(chrome.test.callback(function(file) {
  19     var reader = new FileReader();
  20     reader.onloadend = chrome.test.callbackPass(function(e) {
  21       if (isNew)
  22         chrome.test.assertEq(reader.result, "");
  23       else
  24         chrome.test.assertEq(reader.result.indexOf("Can you see me?"), 0);
  25       // Test that we can write to the file, or not, depending on
  26       // |shouldBeWritable|.
  27       entry.createWriter(function(fileWriter) {
  28         fileWriter.onwriteend = chrome.test.callback(function(e) {
  29           if (fileWriter.error) {
  30             if (shouldBeWritable) {
  31               chrome.test.fail("Error writing to file: " +
  32                                fileWriter.error.toString());
  33             } else {
  34               chrome.test.succeed();
  35             }
  36           } else {
  37             if (shouldBeWritable) {
  38               // Get a new entry and check the data got to disk.
  39               chrome.fileSystem.chooseEntry(chrome.test.callbackPass(
  40                   function(readEntry) {
  41                 readEntry.file(chrome.test.callback(function(readFile) {
  42                   var readReader = new FileReader();
  43                   readReader.onloadend = function(e) {
  44                     chrome.test.assertEq(readReader.result.indexOf("HoHoHo!"),
  45                                          0);
  46                     chrome.test.succeed();
  47                   };
  48                   readReader.onerror = function(e) {
  49                     chrome.test.fail("Failed to read file after write.");
  50                   };
  51                   readReader.readAsText(readFile);
  52                 }));
  53               }));
  54             } else {
  55               chrome.test.fail(
  56                  "'Could write to file that should not be writable.");
  57             }
  58           }
  59         });
  60         var blob = new Blob(["HoHoHo!"], {type: "text/plain"});
  61         fileWriter.write(blob);
  62       });
  63     });
  64     reader.onerror = chrome.test.callback(function(e) {
  65       chrome.test.fail("Error reading file contents.");
  66     });
  67     reader.readAsText(file);
  68   }));
  69 }