76 lines
1.5 KiB
JavaScript
76 lines
1.5 KiB
JavaScript
'use strict'
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const tap = require('tap')
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const path = require('path')
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const { Writable } = require('stream')
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const { tmpdir } = require('os')
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const { randomUUID } = require('crypto')
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const { readFile, rm } = require('fs/promises')
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const { setTimeout } = require('timers/promises')
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const bufferToHexDump = require('./buffer-to-hex-dump')
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const input = Buffer.from([
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0x00, 0x01, 0x02, 0x03, 0x04,
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0x05, 0x06, 0x07, 0x08, 0x09,
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0x0a, 0x0b, 0x0c
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])
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tap.test('writes to stream', t => {
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const expected = [
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'[0x00, 0x01, 0x02, 0x03, \n',
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'0x04, 0x05, 0x06, 0x07, \n',
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'0x08, 0x09, 0x0a, 0x0b, \n',
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'0x0c]'
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].join('')
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let found = ''
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const destination = new Writable({
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write (chunk, encoding, callback) {
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found += chunk.toString()
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callback()
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}
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})
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destination.on('finish', () => {
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t.equal(found, expected)
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t.end()
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})
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bufferToHexDump({
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buffer: input,
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prefix: '0x',
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separator: ', ',
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wrapCharacters: ['[', ']'],
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width: 4,
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closeDestination: true,
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destination
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})
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})
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tap.test('writes to file', async t => {
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const expected = [
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'00010203\n',
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'04050607\n',
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'08090a0b\n',
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'0c'
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].join('')
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const destination = path.join(tmpdir(), randomUUID())
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t.teardown(async () => {
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await rm(destination)
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})
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bufferToHexDump({
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buffer: input,
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width: 4,
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destination
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})
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// Give a little time for the write stream to create and
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// close the file.
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await setTimeout(100)
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const contents = await readFile(destination)
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t.equal(contents.toString(), expected)
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})
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