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