1 | 'use strict';
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2 |
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3 |
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4 | var should = require('chai').should();
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5 | var expect = require('chai').expect;
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6 |
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7 |
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8 |
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9 |
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10 | var BufferUtil = require('../../lib/index').BitcoreBuffer
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11 |
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12 | describe('buffer utils', function() {
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13 |
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14 | describe('equals', function() {
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15 | it('recognizes these two equal buffers', function() {
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16 | var bufferA = new Buffer([1, 2, 3]);
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17 | var bufferB = new Buffer('010203', 'hex');
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18 | BufferUtil.equal(bufferA, bufferB).should.equal(true);
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19 | });
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20 | it('no false positive: returns false with two different buffers', function() {
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21 | var bufferA = new Buffer([1, 2, 3]);
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22 | var bufferB = new Buffer('010204', 'hex');
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23 | BufferUtil.equal(bufferA, bufferB).should.equal(false);
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24 | });
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25 | it('coverage: quickly realizes a difference in size and returns false', function() {
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26 | var bufferA = new Buffer([1, 2, 3]);
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27 | var bufferB = new Buffer([]);
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28 | BufferUtil.equal(bufferA, bufferB).should.equal(false);
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29 | });
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30 | it('"equals" is an an alias for "equal"', function() {
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31 | var bufferA = new Buffer([1, 2, 3]);
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32 | var bufferB = new Buffer([1, 2, 3]);
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33 | BufferUtil.equal(bufferA, bufferB).should.equal(true);
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34 | BufferUtil.equals(bufferA, bufferB).should.equal(true);
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35 | });
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36 | });
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37 |
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38 | describe('fill', function() {
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39 | it('checks arguments', function() {
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40 | expect(function() {
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41 | BufferUtil.fill('something');
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42 | }).to.throw('Invalid Argument');
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43 | expect(function() {
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44 | BufferUtil.fill(new Buffer([0, 0, 0]), 'invalid');
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45 | }).to.throw('Invalid Argument');
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46 | });
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47 | it('works correctly for a small buffer', function() {
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48 | var buffer = BufferUtil.fill(new Buffer(10), 6);
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49 | for (var i = 0; i < 10; i++) {
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50 | buffer[i].should.equal(6);
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51 | }
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52 | });
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53 | });
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54 |
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55 | describe('isBuffer', function() {
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56 | it('has no false positive', function() {
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57 | expect(BufferUtil.isBuffer(1)).to.equal(false);
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58 | });
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59 | it('has no false negative', function() {
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60 | expect(BufferUtil.isBuffer(new Buffer(0))).to.equal(true);
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61 | });
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62 | });
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63 |
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64 | describe('emptyBuffer', function() {
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65 | it('creates a buffer filled with zeros', function() {
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66 | var buffer = BufferUtil.emptyBuffer(10);
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67 | expect(buffer.length).to.equal(10);
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68 | for (var i = 0; i < 10; i++) {
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69 | expect(buffer[i]).to.equal(0);
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70 | }
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71 | });
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72 | it('checks arguments', function() {
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73 | expect(function() {
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74 | BufferUtil.emptyBuffer('invalid');
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75 | }).to.throw('Invalid Argument');
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76 | });
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77 | });
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78 |
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79 | describe('single byte buffer <=> integer', function() {
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80 | it('integerAsSingleByteBuffer should return a buffer of length 1', function() {
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81 | expect(BufferUtil.integerAsSingleByteBuffer(100)[0]).to.equal(100);
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82 | });
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83 | it('should check the type', function() {
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84 | expect(function() {
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85 | BufferUtil.integerAsSingleByteBuffer('invalid');
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86 | }).to.throw('Invalid Argument');
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87 | expect(function() {
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88 | BufferUtil.integerFromSingleByteBuffer('invalid');
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89 | }).to.throw('Invalid Argument');
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90 | });
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91 | it('works correctly for edge cases', function() {
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92 | expect(BufferUtil.integerAsSingleByteBuffer(255)[0]).to.equal(255);
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93 | expect(BufferUtil.integerAsSingleByteBuffer(-1)[0]).to.equal(255);
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94 | });
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95 | it('does a round trip', function() {
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96 | expect(BufferUtil.integerAsSingleByteBuffer(
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97 | BufferUtil.integerFromSingleByteBuffer(new Buffer([255]))
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98 | )[0]).to.equal(255);
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99 | });
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100 | });
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101 |
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102 | describe('4byte buffer integer <=> integer', function() {
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103 | it('integerAsBuffer should return a buffer of length 4', function() {
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104 | expect(BufferUtil.integerAsBuffer(100).length).to.equal(4);
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105 | });
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106 | it('is little endian', function() {
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107 | expect(BufferUtil.integerAsBuffer(100)[3]).to.equal(100);
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108 | });
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109 | it('should check the type', function() {
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110 | expect(function() {
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111 | BufferUtil.integerAsBuffer('invalid');
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112 | }).to.throw('Invalid Argument');
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113 | expect(function() {
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114 | BufferUtil.integerFromBuffer('invalid');
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115 | }).to.throw('Invalid Argument');
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116 | });
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117 | it('works correctly for edge cases', function() {
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118 | expect(BufferUtil.integerAsBuffer(4294967295)[0]).to.equal(255);
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119 | expect(BufferUtil.integerAsBuffer(4294967295)[3]).to.equal(255);
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120 | expect(BufferUtil.integerAsBuffer(-1)[0]).to.equal(255);
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121 | expect(BufferUtil.integerAsBuffer(-1)[3]).to.equal(255);
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122 | });
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123 | it('does a round trip', function() {
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124 | expect(BufferUtil.integerFromBuffer(
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125 | BufferUtil.integerAsBuffer(10000)
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126 | )).to.equal(10000);
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127 | });
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128 | });
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129 |
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130 | describe('buffer to hex', function() {
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131 | it('returns an expected value in hexa', function() {
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132 | expect(BufferUtil.bufferToHex(new Buffer([255, 0, 128]))).to.equal('ff0080');
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133 | });
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134 | it('checks the argument type', function() {
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135 | expect(function() {
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136 | BufferUtil.bufferToHex('invalid');
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137 | }).to.throw('Invalid Argument');
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138 | });
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139 | it('round trips', function() {
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140 | var original = new Buffer([255, 0, 128]);
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141 | var hexa = BufferUtil.bufferToHex(original);
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142 | var back = BufferUtil.hexToBuffer(hexa);
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143 | expect(BufferUtil.equal(original, back)).to.equal(true);
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144 | });
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145 | });
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146 |
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147 | describe('reverse', function() {
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148 | it('reverses a buffer', function() {
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149 |
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150 | var original = new Buffer([255, 0, 128]);
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151 | var reversed = BufferUtil.reverse(original);
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152 | original[0].should.equal(reversed[2]);
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153 | original[1].should.equal(reversed[1]);
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154 | original[2].should.equal(reversed[0]);
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155 | });
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156 | });
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157 | });
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