124 lines
3.4 KiB
JavaScript
124 lines
3.4 KiB
JavaScript
var assert = require('assert')
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var convert = require('../').convert
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describe('convert', function() {
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describe('bytesToHex', function() {
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it('handles example 1', function() {
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assert.equal(convert.bytesToHex([0, 1, 2, 255]), '000102ff')
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})
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})
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describe('hexToBytes', function() {
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it('handles example 1', function() {
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assert.deepEqual(convert.hexToBytes('000102ff'), [0, 1, 2, 255])
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})
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})
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it('converts from bytes to hex and back', function() {
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var bytes = []
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for (var i=0 ; i<256 ; ++i) {
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bytes.push(i)
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}
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var hex = convert.bytesToHex(bytes)
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assert.equal(hex.length, 512)
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assert.deepEqual(convert.hexToBytes(hex), bytes)
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})
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describe('byte array and word array conversions', function(){
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var bytes, wordArray
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beforeEach(function(){
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bytes = [
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98, 233, 7, 177, 92, 191, 39, 213, 66, 83,
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153, 235, 246, 240, 251, 80, 235, 184, 143, 24
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]
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wordArray = {
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words: [1659439025, 1556031445, 1112775147, -151979184, -340226280],
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sigBytes: 20
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}
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})
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describe('bytesToWords', function() {
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it('works', function() {
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assert.deepEqual(convert.bytesToWordArray(bytes), wordArray)
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})
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})
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describe('bytesToWords', function() {
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it('works', function() {
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assert.deepEqual(convert.wordArrayToBytes(wordArray), bytes)
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})
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})
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})
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describe('numToVarInt', function() {
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describe('works', function() {
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var data = [
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0, 128, 252, // 8-bit
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256, 512, 1024, // 16-bit
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65541, // 32-bit
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4294967299, // 64-bit
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]
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var expected = [
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[0], [128], [252], // 8-bit
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[253, 0, 1], [253, 0, 2], [253, 0, 4], // 16-bit
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[254, 5, 0, 1, 0], // 32-bit
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[255, 3, 0, 0, 0, 1, 0, 0, 0] // 64-bit
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]
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for (var i = 0; i < data.length; ++i) {
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var actual = convert.numToVarInt(data[i])
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assert.deepEqual(actual, expected[i])
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}
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})
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})
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describe('varIntToNum', function() {
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it('works on valid input', function() {
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var data = [
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[0], [128], [252], // 8-bit
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[253, 0, 1], [253, 0, 2], [253, 0, 4], // 16-bit
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[254, 5, 0, 1, 0], // 32-bit
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[255, 3, 0, 0, 0, 1, 0, 0, 0] // 64-bit
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]
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var expected = [
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0, 128, 252, // 8-bit
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256, 512, 1024, // 16-bit
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65541, // 32-bit
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4294967299, // 64-bit
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]
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for (var i = 0; i < data.length; ++i) {
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var actual = convert.varIntToNum(data[i])
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assert.equal(actual.number, expected[i])
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assert.deepEqual(actual.bytes, data[i])
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}
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})
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it('uses only what is necessary', function() {
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var data = [
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[0, 99],
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[253, 0, 1, 99],
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[254, 5, 0, 1, 0, 99],
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[255, 3, 0, 0, 0, 1, 0, 0, 0, 99]
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]
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var expected = [0, 256, 65541, 4294967299]
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for (var i = 0; i < data.length; ++i) {
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var actual = convert.varIntToNum(data[i])
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assert.equal(actual.number, expected[i])
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assert.deepEqual(actual.bytes, data[i].slice(0, -1))
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}
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})
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})
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describe('reverseEndian', function() {
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it('works', function() {
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var bigEndian = "6a4062273ac4f9ea4ffca52d9fd102b08f6c32faa0a4d1318e3a7b2e437bb9c7"
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var littleEdian = "c7b97b432e7b3a8e31d1a4a0fa326c8fb002d19f2da5fc4feaf9c43a2762406a"
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assert.deepEqual(convert.reverseEndian(bigEndian), littleEdian)
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assert.deepEqual(convert.reverseEndian(littleEdian), bigEndian)
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})
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})
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})
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