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1
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2
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var assert = require('assert'); |
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3
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4
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describe('little endiand and big endian reading', function() { |
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5
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6
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let byteData = require('../../index.js'); |
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7
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8
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// 16-bit |
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9
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it('should turn 2 16-bit signed ints to 2 bytes BE (0s)', function() { |
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10
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assert.deepEqual(byteData.intFrom2Bytes([0, 0, 0, 0], 10, true), |
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11
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[0, 0]); |
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12
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}); |
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13
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it('should turn 2 16-bit signed ints to 2 bytes LE (1s)', function() { |
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14
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assert.deepEqual(byteData.intFrom2Bytes([1, 0, 1, 0]), |
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15
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[1, 1]); |
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16
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}); |
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17
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it('should turn 2 16-bit signed ints to 2 bytes BE (1s)', function() { |
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18
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assert.deepEqual(byteData.intFrom2Bytes([0, 1, 0, 1], 10, true), |
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19
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[1, 1]); |
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20
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}); |
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21
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it('should turn 1 16-bit unsigned ints to 2 bytes BE (1s)', function() { |
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22
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assert.deepEqual(byteData.uIntFrom2Bytes([0, 1], 10, true), |
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23
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[1]); |
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24
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}); |
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25
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it('should turn 2 bytes hex to 1 16-bit float BE (1/3)', function() { |
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26
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assert.deepEqual(byteData.floatFrom2Bytes( |
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27
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["55", "35"], 16, true)[0].toFixed(5), |
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28
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0.33325); |
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29
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}); |
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30
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31
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// 24-bit |
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32
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it('should turn 2 24-bit signed ints to 6 bytes BE (0s)', function() { |
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33
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assert.deepEqual(byteData.intFrom3Bytes([0, 0, 0, 0, 0, 0], 10, true), |
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34
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[0, 0]); |
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35
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}); |
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36
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it('should turn 2 24-bit signed ints to 6 bytes LE (1s)', function() { |
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37
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assert.deepEqual(byteData.intFrom3Bytes([1, 0, 0, 1, 0, 0]), |
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38
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[1, 1]); |
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39
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}); |
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40
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it('should turn 2 24-bit signed ints to 6 bytes BE (1s)', function() { |
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41
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assert.deepEqual(byteData.intFrom3Bytes([0, 0, 1, 0, 0, 1], 10, true), |
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42
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[1, 1]); |
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43
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}); |
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44
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it('should turn 1 24-bit unsigned int to 3 bytes BE (8388607)', function() { |
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45
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assert.deepEqual(byteData.uIntFrom3Bytes(["7f", "ff", "ff"], 16, true), |
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46
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[8388607]); |
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47
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}); |
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48
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it('should turn 2 24-bit signed ints to 6 bytes BE (max range)', function() { |
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49
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assert.deepEqual(byteData.intFrom3Bytes(["80","00","00", "7f", "ff", "ff"], 16, true), |
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50
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[-8388608, 8388607]); |
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51
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}); |
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52
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it('should turn 2 24-bit signed ints to 6 bytes BE', function() { |
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53
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assert.deepEqual(byteData.intFrom3Bytes(["80","00","00" , "00","00","01", "7f", "ff", "ff"], 16, true), |
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54
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[-8388608, 1, 8388607]); |
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55
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}); |
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56
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57
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// 32-bit |
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58
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it('should turn 2 32-bit signed ints to 8 bytes BE (0s)', function() { |
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59
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assert.deepEqual(byteData.intFrom4Bytes([0, 0, 0, 0, 0, 0, 0, 0], 10, true), |
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60
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[0, 0]); |
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61
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}); |
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62
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it('should turn 2 32-bit signed ints to 8 bytes LE (1s)', function() { |
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63
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assert.deepEqual(byteData.intFrom4Bytes([1, 0, 0, 0, 1, 0, 0, 0]), |
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64
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[1, 1]); |
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65
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}); |
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66
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it('should turn 2 32-bit signed ints to 8 bytes BE (1s)', function() { |
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67
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assert.deepEqual(byteData.intFrom4Bytes([0, 0, 0, 1, 0,0, 0, 1], 10, true), |
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68
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[1, 1]); |
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69
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}); |
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70
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it('should turn 1 32-bit signed ints to 4 bytes BE (1s)', function() { |
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71
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assert.deepEqual(byteData.uIntFrom4Bytes([0, 0, 0, 1], 10, true), |
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72
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[1]); |
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73
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}); |
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74
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it('should turn 8 bytes hex to 2 32-bit ints (max range)', function() { |
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75
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assert.deepEqual(byteData.intFrom4Bytes( |
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76
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["80","0","0","0", "7f","ff","ff","ff"], 16, true), |
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77
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[-2147483648,2147483647]); |
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78
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}); |
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79
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it('should turn 1 32-bit float from 4 bytes BE hex (1s)', function() { |
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80
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assert.deepEqual(byteData.floatFrom4Bytes( |
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81
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["40","9","70","5f"], 16, true)[0].toFixed(7), |
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82
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2.1474836); |
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83
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}); |
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84
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85
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// 40-bit |
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86
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it('should turn 2 40-bit signed ints to 10 bytes BE (0s)', function() { |
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87
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assert.deepEqual(byteData.intFrom5Bytes([0, 0, 0, 0, 0, 0, 0, 0, 0, 0], 10, true), |
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88
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[0, 0]); |
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89
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}); |
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90
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it('should turn 2 40-bit signed ints to 10 bytes LE (1s)', function() { |
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91
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assert.deepEqual(byteData.intFrom5Bytes([1, 0, 0, 0, 0, 1, 0, 0, 0, 0]), |
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92
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[1, 1]); |
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93
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}); |
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94
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it('should turn 2 40-bit signed ints to 10 bytes BE (1s)', function() { |
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95
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assert.deepEqual(byteData.intFrom5Bytes([0, 0, 0, 0, 1, 0, 0, 0, 0, 1], 10, true), |
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96
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[1, 1]); |
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97
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}); |
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98
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it('should turn 1 40-bit signed ints to 10 bytes LE (1s)', function() { |
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99
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assert.deepEqual(byteData.intFrom5Bytes( |
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100
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[1, 0, 0, 0, 0], 10), |
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101
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[1]); |
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102
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}); |
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103
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it('should turn 5 bytes (hex) to 1 unsigned 40-bit int (149515627075)', |
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104
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function() { |
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105
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assert.deepEqual(byteData.uIntFrom5Bytes( |
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106
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["22","cf","d3","6a","43"], 16, true), |
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107
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[149515627075]); |
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108
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}); |
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109
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110
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// 48-bit |
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111
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it('should turn 2 48-bit ints to 12 bytes BE (0s)', function() { |
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112
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assert.deepEqual(byteData.intFrom6Bytes([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], 10, true), |
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113
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[0, 0]); |
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114
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}); |
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115
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it('should turn 2 48-bit ints to 12 bytes LE (1s)', function() { |
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116
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assert.deepEqual(byteData.intFrom6Bytes([1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0]), |
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117
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[1, 1]); |
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118
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}); |
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119
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it('should turn 2 48-bit ints to 12 bytes BE (1s)', function() { |
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120
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assert.deepEqual(byteData.intFrom6Bytes([0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1], 10, true), |
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121
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[1, 1]); |
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122
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}); |
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123
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it('should turn 2 48-bit unsigned ints to 12 bytes BE (1s)', function() { |
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124
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assert.deepEqual(byteData.uIntFrom6Bytes([0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1], 10, true), |
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125
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[1, 1]); |
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126
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}); |
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127
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it('should turn 1 48-bit ints to 6 bytes hex BE (120637438355317)', function() { |
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128
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assert.deepEqual(byteData.intFrom6Bytes(["6d", "b8", "17", "a8", "e7", "75"], 16, 2), |
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129
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[120637438355317]); |
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130
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}); |
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131
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it('should turn 1 48-bit unsigned ints to 6 bytes hex BE (120637438355317)', function() { |
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132
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let bytes = ["6d", "b8", "17", "a8", "e7", "75", |
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133
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"00", "00", "00", "00", "00", "01", |
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134
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"00", "00", "00", "00", "00", "01"]; |
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135
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assert.deepEqual(byteData.intFrom6Bytes(bytes, 16, 2), |
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136
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[120637438355317, 1, 1]); |
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137
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}); |
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138
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139
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// 64-bit |
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140
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it('should turn 1 64-bit float to 8 bytes BE (pi)', function() { |
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141
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assert.deepEqual(byteData.floatFrom8Bytes([64, 9, 33, 251, 84, 68, 45, 24], 10, true), |
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142
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[3.141592653589793]); |
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143
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}); |
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144
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}); |
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145
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rochars /
byte-data
