gecko/netwerk/test/unit/test_NetUtil.js

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Necko Test Code.
 *
 * The Initial Developer of the Original Code is
 * Mozilla Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2009
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Shawn Wilsher <me@shawnwilsher.com> (Original Author)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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/**
 * This file tests the methods on NetUtil.jsm.
 */

Components.utils.import("resource://gre/modules/NetUtil.jsm");
const Cc = Components.classes;
const Ci = Components.interfaces;

////////////////////////////////////////////////////////////////////////////////
//// Helper Methods

/**
 * Reads the contents of a file and returns it as a string.
 *
 * @param aFile
 *        The file to return from.
 * @return the contents of the file in the form of a string.
 */
function getFileContents(aFile)
{
  let fstream = Cc["@mozilla.org/network/file-input-stream;1"].
                createInstance(Ci.nsIFileInputStream);
  fstream.init(aFile, -1, 0, 0);

  let cstream = Cc["@mozilla.org/intl/converter-input-stream;1"].
                createInstance(Ci.nsIConverterInputStream);
  cstream.init(fstream, "UTF-8", 0, 0);

  let string  = {};
  cstream.readString(-1, string);
  cstream.close();
  return string.value;
}

////////////////////////////////////////////////////////////////////////////////
//// Tests

function test_async_write_file()
{
  do_test_pending();

  // First, we need an output file to write to.
  let file = Cc["@mozilla.org/file/directory_service;1"].
             getService(Ci.nsIProperties).
             get("TmpD", Ci.nsIFile);
  file.append("NetUtil-async-test-file.tmp");
  file.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, 0666);

  // Then, we need an output stream to our output file.
  let ostream = Cc["@mozilla.org/network/file-output-stream;1"].
                createInstance(Ci.nsIFileOutputStream);
  ostream.init(file, -1, -1, 0);

  // Finally, we need an input stream to take data from.
  const TEST_DATA = "this is a test string";
  let istream = Cc["@mozilla.org/io/string-input-stream;1"].
                createInstance(Ci.nsIStringInputStream);
  istream.setData(TEST_DATA, TEST_DATA.length);

  NetUtil.asyncCopy(istream, ostream, function(aResult) {
    // Make sure the copy was successful!
    do_check_true(Components.isSuccessCode(aResult));

    // Check the file contents.
    do_check_eq(TEST_DATA, getFileContents(file));

    // Remove the file, and finish the test.
    file.remove(false);
    do_test_finished();
    run_next_test();
  });
}

////////////////////////////////////////////////////////////////////////////////
//// Test Runner

let tests = [
  test_async_write_file,
];
let index = 0;

function run_next_test()
{
  if (index < tests.length) {
    do_test_pending();
    print("Running the next test: " + tests[index].name);
    tests[index++]();
  }

  do_test_finished();
}

function run_test()
{
  do_test_pending();
  run_next_test();
}