// Copyright 2008 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.provide('goog.crypt.hash32Test');
goog.setTestOnly('goog.crypt.hash32Test');

goog.require('goog.crypt.hash32');
goog.require('goog.testing.TestCase');
goog.require('goog.testing.jsunit');

// NOTE: This test uses a custom test case, see end of script block

// Test data based on known input/output pairs generated using
// http://go/hash.java

function testEncodeInteger() {
  assertEquals(898813988, goog.crypt.hash32.encodeInteger(305419896));
}

function testEncodeByteArray() {
  assertEquals(-1497024495,
      goog.crypt.hash32.encodeByteArray([10, 20, 30, 40]));
  assertEquals(-961586214,
      goog.crypt.hash32.encodeByteArray([3, 1, 4, 1, 5, 9]));
  assertEquals(-1482202299,
      goog.crypt.hash32.encodeByteArray([127, 0, 0, 0, 123, 45]));
  assertEquals(170907881,
      goog.crypt.hash32.encodeByteArray([9, 1, 1]));
}

function testKnownByteArrays() {
  for (var i = 0; i < byteArrays.length; i++) {
    assertEquals(byteArrays[i],
        goog.crypt.hash32.encodeByteArray(createByteArray(i)));
  }
}

function testEncodeString() {
  assertEquals(-937588052, goog.crypt.hash32.encodeString('Hello, world'));
  assertEquals(62382810, goog.crypt.hash32.encodeString('Sch\xF6n'));
}

function testEncodeStringUtf8() {
  assertEquals(-937588052,
      goog.crypt.hash32.encodeStringUtf8('Hello, world'));
  assertEquals(-833263351, goog.crypt.hash32.encodeStringUtf8('Sch\xF6n'));

  assertEquals(-1771620293, goog.crypt.hash32.encodeStringUtf8(
      '\u043A\u0440'));
}

function testEncodeString_ascii() {
  assertEquals('For ascii characters UTF8 should be the same',
      goog.crypt.hash32.encodeStringUtf8('abc123'),
      goog.crypt.hash32.encodeString('abc123'));

  assertEquals('For ascii characters UTF8 should be the same',
      goog.crypt.hash32.encodeStringUtf8('The,quick.brown-fox'),
      goog.crypt.hash32.encodeString('The,quick.brown-fox'));

  assertNotEquals('For non-ascii characters UTF-8 encoding is different',
      goog.crypt.hash32.encodeStringUtf8('Sch\xF6n'),
      goog.crypt.hash32.encodeString('Sch\xF6n'));
}

function testEncodeString_poe() {
  var poe = "Once upon a midnight dreary, while I pondered weak and weary," +
      "Over many a quaint and curious volume of forgotten lore," +
      "While I nodded, nearly napping, suddenly there came a tapping," +
      "As of some one gently rapping, rapping at my chamber door." +
      "`'Tis some visitor,' I muttered, `tapping at my chamber door -" +
      "Only this, and nothing more.'" +
      "Ah, distinctly I remember it was in the bleak December," +
      "And each separate dying ember wrought its ghost upon the floor." +
      "Eagerly I wished the morrow; - vainly I had sought to borrow" +
      "From my books surcease of sorrow - sorrow for the lost Lenore -" +
      "For the rare and radiant maiden whom the angels named Lenore -" +
      "Nameless here for evermore." +
      "And the silken sad uncertain rustling of each purple curtain" +
      "Thrilled me - filled me with fantastic terrors never felt before;" +
      "So that now, to still the beating of my heart, I stood repeating" +
      "`'Tis some visitor entreating entrance at my chamber door -" +
      "Some late visitor entreating entrance at my chamber door; -" +
      "This it is, and nothing more,'" +
      "Presently my soul grew stronger; hesitating then no longer," +
      "`Sir,' said I, `or Madam, truly your forgiveness I implore;" +
      "But the fact is I was napping, and so gently you came rapping," +
      "And so faintly you came tapping, tapping at my chamber door," +
      "That I scarce was sure I heard you' - here I opened wide the door; -" +
      "Darkness there, and nothing more." +
      "Deep into that darkness peering, long I stood there wondering, " +
      "fearing," +
      "Doubting, dreaming dreams no mortal ever dared to dream before" +
      "But the silence was unbroken, and the darkness gave no token," +
      "And the only word there spoken was the whispered word, `Lenore!'" +
      "This I whispered, and an echo murmured back the word, `Lenore!'" +
      "Merely this and nothing more." +
      "Back into the chamber turning, all my soul within me burning," +
      "Soon again I heard a tapping somewhat louder than before." +
      "`Surely,\' said I, `surely that is something at my window lattice;" +
      "Let me see then, what thereat is, and this mystery explore -" +
      "Let my heart be still a moment and this mystery explore; -" +
      "'Tis the wind and nothing more!'";

  assertEquals(147608747, goog.crypt.hash32.encodeString(poe));
  assertEquals(147608747, goog.crypt.hash32.encodeStringUtf8(poe));
}

function testBenchmarking() {
  if (!testCase) return;
  // Not a real test, just outputs some timing
  function makeString(n) {
    var str = [];
    for (var i = 0; i < n; i++) {
      str.push(String.fromCharCode(Math.round(Math.random() * 500)));
    }
    return str.join('');
  }
  for (var i = 0; i < 50000; i += 10000) {
    var str = makeString(i);
    var start = goog.now();
    var hash = goog.crypt.hash32.encodeString(str);
    var diff = goog.now() - start;
    testCase.saveMessage(
        'testBenchmarking : hashing ' + i + ' chars in ' + diff + 'ms');
  }
}

function createByteArray(n) {
  var arr = [];
  for (var i = 0; i < n; i++) {
    arr.push(i);
  }
  return arr;
}

var byteArrays = {
  0: 1539411136,
  1: 1773524747,
  2: -254958930,
  3: 1532114172,
  4: 1923165449,
  5: 1611874589,
  6: 1502126780,
  7: -751745251,
  8: -292491321,
  9: 1106193218,
  10: -722791438,
  11: -2130666060,
  12: -259304553,
  13: 871461192,
  14: 865773084,
  15: 1615738330,
  16: -1836636447,
  17: -485722519,
  18: -120832227,
  19: 1954449704,
  20: 491312921,
  21: -1955462668,
  22: 168565425,
  23: -105893922,
  24: 620486614,
  25: -1789602428,
  26: 1765793554,
  27: 1723370948,
  28: -1275405721,
  29: 140421019,
  30: -1438726307,
  31: 538438903,
  32: -729123980,
  33: 1213490939,
  34: -1814248478,
  35: 1943703398,
  36: 1603073219,
  37: -2139639543,
  38: -694153941,
  39: 137511516,
  40: -249943726,
  41: -1166126060,
  42: 53464833,
  43: -915350862,
  44: 1306585409,
  45: 1064798289,
  46: 335555913,
  47: 224485496,
  48: 275599760,
  49: 409559869,
  50: 673770580,
  51: -2113819879,
  52: -791338727,
  53: -1716479479,
  54: 1795018816,
  55: 2020139343,
  56: -1652827750,
  57: -1509632558,
  58: 751641995,
  59: -217881377,
  60: -476546900,
  61: -1893349644,
  62: -729290332,
  63: 1359899321,
  64: 1811814306,
  65: 2100363086,
  66: -794920327,
  67: -1667555017,
  68: -549980099,
  69: -21170740,
  70: -1324143722,
  71: 1406730195,
  72: 2111381574,
  73: -1667480052,
  74: 1071811178,
  75: -1080194099,
  76: -181186882,
  77: 268677507,
  78: -546766334,
  79: 555953522,
  80: -981311675,
  81: 1988867392,
  82: 773172547,
  83: 1160806722,
  84: -1455460187,
  85: 83493600,
  86: 155365142,
  87: 1714618071,
  88: 1487712615,
  89: -810670278,
  90: 2031655097,
  91: 1286349470,
  92: -1873594211,
  93: 1875867480,
  94: -1096259787,
  95: -1054968610,
  96: -1723043458,
  97: 1278708307,
  98: -601104085,
  99: 1497928579,
  100: 1329732615,
  101: -1281696190,
  102: 1471511953,
  103: -62666299,
  104: 807569747,
  105: -1927974759,
  106: 1462243717,
  107: -862975602,
  108: 824369927,
  109: -1448816781,
  110: 1434162022,
  111: -881501413,
  112: -1554381107,
  113: -1730883204,
  114: 431236217,
  115: 1877278608,
  116: -673864625,
  117: 143000665,
  118: -596902829,
  119: 1038860559,
  120: 805884326,
  121: -1536181710,
  122: -1357373256,
  123: 1405134250,
  124: -860816481,
  125: 1393578269,
  126: -810682545,
  127: -635515639
};

var testCase;
if (G_testRunner) {
  testCase = new goog.testing.TestCase(document.title);
  testCase.autoDiscoverTests();
  G_testRunner.initialize(testCase);
}
