First commit

node_modules/@ldapjs/asn1/lib/buffer-to-hex-dump.test.js

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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)
+})