87 lines
2.6 KiB
TypeScript
87 lines
2.6 KiB
TypeScript
import { afterEach, describe, expect, it, vi } from 'vitest'
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import { buffersEqual, bufferToReversed, cloneBuffer, concatBuffers } from './buffer-utils.js'
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describe('buffersEqual', () => {
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it('should return true for equal buffers', () => {
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expect(buffersEqual(new Uint8Array([]), new Uint8Array([]))).is.true
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expect(buffersEqual(new Uint8Array([1, 2, 3]), new Uint8Array([1, 2, 3]))).is.true
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})
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it('should return false for non-equal buffers', () => {
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expect(buffersEqual(new Uint8Array([1]), new Uint8Array([]))).is.false
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expect(buffersEqual(new Uint8Array([1, 2, 3]), new Uint8Array([1, 2, 4]))).is.false
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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 = new Uint8Array([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 = new Uint8Array([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('concatBuffers', () => {
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it('should concat buffers', () => {
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const buf = concatBuffers([new Uint8Array([1, 2, 3]), new Uint8Array([4, 5, 6])])
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expect([...buf]).eql([1, 2, 3, 4, 5, 6])
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})
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it('should create a new buffer', () => {
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const buf1 = new Uint8Array([1, 2, 3])
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const buf2 = new Uint8Array([4, 5, 6])
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const buf = concatBuffers([buf1, buf2])
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buf[0] = 0xff
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expect(buf1[0]).not.eql(0xff)
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})
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it('should work without native Buffer', () => {
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vi.stubGlobal('Buffer', undefined)
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const buf1 = new Uint8Array([1, 2, 3])
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const buf2 = new Uint8Array([4, 5, 6])
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const buf = concatBuffers([buf1, buf2])
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buf1[0] = 0xff
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expect([...buf]).eql([1, 2, 3, 4, 5, 6])
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})
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afterEach(() => void vi.unstubAllGlobals())
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})
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describe('bufferToReversed', () => {
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it('should reverse the buffer', () => {
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const buf = bufferToReversed(new Uint8Array([1, 2, 3, 4, 5, 6]))
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expect([...buf]).eql([6, 5, 4, 3, 2, 1])
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})
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it('should reverse a part of the buffer', () => {
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const buf = bufferToReversed(new Uint8Array([1, 2, 3, 4, 5, 6]), 1, 5)
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expect([...buf]).eql([5, 4, 3, 2])
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})
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it('should create a new buffer', () => {
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const buf1 = new Uint8Array([1, 2, 3])
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const buf2 = bufferToReversed(buf1)
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buf2[0] = 0xff
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expect([...buf1]).eql([1, 2, 3])
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})
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})
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