136 lines
3.9 KiB
TypeScript
136 lines
3.9 KiB
TypeScript
import { expect } from 'chai'
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import { describe, it } from 'mocha'
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import {
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buffersEqual,
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cloneBuffer,
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encodeUrlSafeBase64,
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parseUrlSafeBase64,
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randomBytes,
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xorBuffer,
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xorBufferInPlace,
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} from '../src/utils/buffer-utils'
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describe('buffersEqual', () => {
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it('should return true for equal buffers', () => {
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expect(buffersEqual(Buffer.from([]), Buffer.from([]))).is.true
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expect(buffersEqual(Buffer.from([1, 2, 3]), Buffer.from([1, 2, 3]))).is
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.true
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})
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it('should return false for non-equal buffers', () => {
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expect(buffersEqual(Buffer.from([1]), Buffer.from([]))).is.false
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expect(buffersEqual(Buffer.from([1, 2, 3]), Buffer.from([1, 2, 4]))).is
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.false
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})
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})
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describe('xorBuffer', () => {
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it('should xor buffers without modifying original', () => {
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const data = Buffer.from('hello')
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const key = Buffer.from('xor')
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const xored = xorBuffer(data, key)
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expect(data.toString()).eq('hello')
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expect(key.toString()).eq('xor')
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expect(xored.toString('hex')).eq('100a1e6c6f')
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})
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it('should be deterministic', () => {
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const data = Buffer.from('hello')
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const key = Buffer.from('xor')
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const xored1 = xorBuffer(data, key)
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expect(xored1.toString('hex')).eq('100a1e6c6f')
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const xored2 = xorBuffer(data, key)
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expect(xored2.toString('hex')).eq('100a1e6c6f')
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})
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it('second call should decode content', () => {
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const data = Buffer.from('hello')
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const key = Buffer.from('xor')
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const xored1 = xorBuffer(data, key)
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expect(xored1.toString('hex')).eq('100a1e6c6f')
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const xored2 = xorBuffer(xored1, key)
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expect(xored2.toString()).eq('hello')
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})
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})
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describe('xorBufferInPlace', () => {
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it('should xor buffers by modifying original', () => {
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const data = Buffer.from('hello')
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const key = Buffer.from('xor')
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xorBufferInPlace(data, key)
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expect(data.toString('hex')).eq('100a1e6c6f')
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expect(key.toString()).eq('xor')
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})
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it('second call should decode content', () => {
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const data = Buffer.from('hello')
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const key = Buffer.from('xor')
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xorBufferInPlace(data, key)
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expect(data.toString('hex')).eq('100a1e6c6f')
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xorBufferInPlace(data, key)
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expect(data.toString()).eq('hello')
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})
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})
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describe('randomBytes', () => {
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it('should return exactly N bytes', () => {
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expect(randomBytes(0).length).eq(0)
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expect(randomBytes(5).length).eq(5)
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expect(randomBytes(10).length).eq(10)
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expect(randomBytes(256).length).eq(256)
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})
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it('should not be deterministic', () => {
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expect([...randomBytes(8)]).not.eql([...randomBytes(8)])
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})
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})
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describe('cloneBuffer', () => {
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it('should clone buffer', () => {
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const orig = Buffer.from([1, 2, 3])
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const copy = cloneBuffer(orig)
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expect([...copy]).eql([1, 2, 3])
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orig[0] = 0xff
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expect(copy[0]).not.eql(0xff)
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})
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it('should clone buffer partially', () => {
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const orig = Buffer.from([1, 2, 3, 4, 5])
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const copy = cloneBuffer(orig, 1, 4)
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expect([...copy]).eql([2, 3, 4])
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orig[0] = 0xff
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expect(copy[0]).not.eql(0xff)
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})
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})
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describe('parseUrlSafeBase64', () => {
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it('should parse url-safe base64', () => {
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expect(parseUrlSafeBase64('qu7d8aGTeuF6-g').toString('hex')).eq(
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'aaeeddf1a1937ae17afa',
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)
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})
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it('should parse normal base64', () => {
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expect(parseUrlSafeBase64('qu7d8aGTeuF6+g==').toString('hex')).eq(
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'aaeeddf1a1937ae17afa',
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)
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})
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})
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describe('encodeUrlSafeBase64', () => {
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it('should encode to url-safe base64', () => {
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expect(
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encodeUrlSafeBase64(Buffer.from('aaeeddf1a1937ae17afa', 'hex')),
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).eq('qu7d8aGTeuF6-g')
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})
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})
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