encoder-test.js 4.43 KB
Newer Older
jatuporn Tonggasem's avatar
jatuporn Tonggasem committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166
var assert = require('assert');
var hpack = require('../');

describe('hpack/encoder', function() {
  var encoder;

  beforeEach(function() {
    encoder = hpack.encoder.create();
  });

  function expect(arr, enc) {
    function isNumber(num) {
      return typeof num === 'number';
    }

    var out = Buffer.concat(encoder.render()).toString('hex');
    if (Array.isArray(arr) && !arr.every(isNumber)) {
      arr = arr.map(function(item) {
        return new Buffer(item, enc);
      });
      arr = Buffer.concat(arr);
    } else {
      arr = new Buffer(arr, enc);
    }
    var actual = arr.toString('hex');
    assert.equal(out, actual);
  }

  describe('bit', function() {
    it('should encode number bit-by-bit', function() {
      [ 1, 1, 1, 0, 1, 0, 1, 0,
        1, 0, 1, 0, 1, 1, 1, 1 ].forEach(function(bit) {
        encoder.encodeBit(bit);
      });
      expect([
        0b11101010,
        0b10101111
      ]);
    });

    it('should encode number using multiple bits', function() {
      for (var i = 0; i < 8; i++)
        encoder.encodeBits(0b1011010, 7);
      expect([
        0b10110101,
        0b01101010,
        0b11010101,
        0b10101011,
        0b01010110,
        0b10101101,
        0b01011010
      ]);
    });
  });

  describe('integer', function() {
    it('should encode 10 in prefix-5 (C.1.1)', function() {
      encoder.skipBits(3);
      encoder.encodeInt(10);
      expect([ 0x0a ]);
    });

    it('should decode 1337 in prefix-5 (C.1.2)', function() {
      encoder.skipBits(3);
      encoder.encodeInt(1337);
      expect([
        0b00011111,
        0b10011010,
        0b00001010
      ]);
    });

    it('should decode 42 at octect boundary (C.1.3)', function() {
      encoder.encodeInt(42);
      expect([ 0b00101010 ]);
    });

    it('should regression 6-bit test', function() {
      encoder.skipBits(2);
      encoder.encodeInt(63);
      expect([ 0b00111111, 0b00000000 ]);
    });
  });

  describe('string', function() {
    it('should encode literal from (C.2.1)', function() {
      encoder.encodeStr(new Buffer('custom-key'), false);
      expect([ [ 0x0a ], 'custom-key' ]);
    });

    it('should encode literal from (C.4.1)', function() {
      encoder.encodeStr(new Buffer('www.example.com'), true);
      expect('8c' +
                 'f1e3 c2e5 f23a 6ba0 ab90 f4ff'.replace(/ /g, ''),
             'hex');
    });

    it('should decode literal from (C.4.2)', function() {
      encoder.encodeStr(new Buffer('no-cache'), true);
      expect(
        '86' +
            'a8eb 1064 9cbf'.replace(/ /g, ''),
        'hex');
    });

    it('should encode literal from (C.4.3) #1', function() {
      encoder.encodeStr(new Buffer('custom-key'), true);
      expect(
        '88' +
            '25a8 49e9 5ba9 7d7f'.replace(/ /g, ''),
        'hex');
    });

    it('should encode literal from (C.4.3) #2', function() {
      encoder.encodeStr(new Buffer('custom-value'), true);
      expect(
        '89' +
            '25a8 49e9 5bb8 e8b4 bf'.replace(/ /g, ''),
        'hex');
    });

    it('should encode literal from (C.6.1) #1', function() {
      encoder.encodeStr(new Buffer('Mon, 21 Oct 2013 20:13:21 GMT'), true);
      expect(
        ('96' +
            'd07a be94 1054 d444 a820 0595 040b 8166' +
            'e082 a62d 1bff').replace(/ /g, ''),
        'hex');
    });

    it('should encode literal from (C.6.1) #2', function() {
      encoder.encodeStr(new Buffer('https://www.example.com'), true);
      expect(
        ('91' +
            '9d29 ad17 1863 c78f 0b97 c8e9 ae82 ae43' +
            'd3').replace(/ /g, ''),
        'hex');
    });

    it('should encode many 5 bit chars', function() {
      encoder.encodeStr(new Buffer('eeeeeeee'), true);
      // e = 00101, 0x294A5294A5 = 00101 x 8
      expect('85294A5294A5', 'hex');
    });

    it('should encode many 5 bit chars with 3-bit EOS', function() {
      // e = 00101, EOS=111,
      // 0x294A5294A52F = 00101 x 9 + 111
      encoder.encodeStr(new Buffer('eeeeeeeee'), true);
      expect('86294A5294A52F', 'hex');
    });

    it('should decode many 5 bit chars with 2-bit EOS', function() {
      // e = 00101, EOS=11,
      // 0x294A5297 = 00101 x 6 + 11
      encoder.encodeStr(new Buffer('eeeeee'), true);
      expect('84294A5297', 'hex');
    });

    it('should decode many multi-octet chars', function() {
      encoder.encodeStr([ 1, 1, 1, 1, 1, 1, 1, 1 ], true);
      expect('97ffffb1ffff63fffec7fffd8ffffb1ffff63fffec7fffd8',
             'hex');
    });
  });
});