accessibility-developer-tools/lib/closure-library/closure/goog/net/streams/base64pbstreamparser_test.js

This is a library of accessibility-related testing and utility code.

// Copyright 2016 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

goog.module('goog.net.streams.Base64PbStreamParserTest');
goog.setTestOnly('goog.net.streams.Base64PbStreamParserTest');

var testSuite = goog.require('goog.testing.testSuite');
var base64 = goog.require('goog.crypt.base64');
var object = goog.require('goog.object');
var Base64PbStreamParser = goog.require('goog.net.streams.Base64PbStreamParser');

// Static test data
// clang-format off
var testMessage1 = {
  data: [
    0x0a, 0x00,                                            // msg: ''
    0x0a, 0x07, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,  // msg: 'abcdefg'
    0x7a, 0x04, 0x70, 0x61, 0x64, 0x31,                    // padding: 'pad1'
    0x0a, 0x08,  // msg: (special chars)
    0x00, 0x01, 0x02, 0x03, 0x0a, 0xff, 0xfe, 0xfd, 0x7a, 0x00,  // padding: ''
    0x12, 0x17,  // status: (23 bytes long sub-message)
    0x08, 0xc8, 0x01, 0x12, 0x12, 0x73, 0x6f, 0x6d, 0x65, 0x74,
    0x68, 0x69, 0x6e, 0x67, 0x2d, 0x69, 0x73, 0x2d, 0x77, 0x72,
    0x6f, 0x6e, 0x67,
    0x7a, 0x02, 0x00, 0x00  // padding: {0x00, 0x00}
  ],
  parsed: [
    {1: []},
    {1: [0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67]},
    {1: [0x00, 0x01, 0x02, 0x03, 0x0a, 0xff, 0xfe, 0xfd]},
    {2: [0x08, 0xc8, 0x01, 0x12, 0x12, 0x73, 0x6f, 0x6d, 0x65, 0x74, 0x68, 0x69,
         0x6e, 0x67, 0x2d, 0x69, 0x73, 0x2d, 0x77, 0x72, 0x6f, 0x6e, 0x67]}
  ]
};
// clang-format on

/**
 * Encodes input with base64 encoding.
 * @param {!Array<number>} input The input bytes
 * @return {string} The encoded string
 */
function encodeBytes(input) {
  return base64.encodeByteArray(input, true /* websafe */);
}


testSuite({
  testSingleMessage: function() {
    var parser = new Base64PbStreamParser();

    var input = 'CgX__gABdw==';
    var result = parser.parse(input);
    assertEquals(1, result.length);
    assertElementsEquals(['1'], object.getKeys(result[0]));
    assertElementsEquals([0xFF, 0xFE, 0x00, 0x01, 0x77], result[0][1]);

    if (typeof Uint8Array !== 'undefined') {
      assertTrue(result[0][1] instanceof Uint8Array);
    } else {
      assertTrue(result[0][1] instanceof Array);
    }

    result = parser.parse('');
    assertNull(result);
    assertTrue(parser.isInputValid());
  },

  testMultipleMessages: function() {
    var parser = new Base64PbStreamParser();
    var input = encodeBytes(testMessage1.data);
    var expected = testMessage1.parsed;
    var result = parser.parse(input);

    assertEquals(expected.length, result.length);
    for (var i = 0; i < expected.length; i++) {
      var keys = object.getKeys(result[i]);
      assertElementsEquals(object.getKeys(expected[i]), keys);

      assertEquals(1, keys.length);
      assertElementsEquals(expected[i][keys[0]], result[i][keys[0]]);
    }
  },

  testInvalidInputs: function() {
    var parser1 = new Base64PbStreamParser();
    // invalid base-64 character
    assertThrows(function() { parser1.parse('badchar!'); });
    assertFalse(parser1.isInputValid());
    // parser already invalidated
    assertThrows(function() { parser1.parse('CgX__gABdw=='); });
    assertFalse(parser1.isInputValid());

    var parser2 = new Base64PbStreamParser();
    // invalid message tag
    assertThrows(function() { parser2.parse('GgGq'); });
    assertFalse(parser2.isInputValid());

    var parser3 = new Base64PbStreamParser();
    // message length too long
    assertThrows(function() { parser3.parse('Cv____8Q'); });
    assertFalse(parser3.isInputValid());
  },

  testMessagesInChunks: function() {
    // clang-format off
    var data = [
      0x0a, 0x03, 0x61, 0x62, 0x63,
      0x0a, 0x03, 0x64, 0x65, 0x66,
      0x12, 0x03, 0x67, 0x68, 0x69
    ];
    // clang-format on

    var parser = new Base64PbStreamParser();

    var result = parser.parse(encodeBytes(data.slice(0, 3)));
    assertNull(result);

    result = parser.parse(encodeBytes(data.slice(3, 12)));
    assertEquals(2, result.length);
    assertElementsEquals(['1'], object.getKeys(result[0]));
    assertElementsEquals([0x61, 0x62, 0x63], result[0][1]);
    assertElementsEquals(['1'], object.getKeys(result[1]));
    assertElementsEquals([0x64, 0x65, 0x66], result[1][1]);

    result = parser.parse(encodeBytes(data.slice(12)));
    assertEquals(1, result.length);
    assertElementsEquals(['2'], object.getKeys(result[0]));
    assertElementsEquals([0x67, 0x68, 0x69], result[0][2]);
  }
});