nodejs: add tests to library (#7694)

* nodejs: add tests to library

* new tests

* remove message splitting

* fix race

* docs

* replace extract-zip with yauzl that it wraps (high severity issue)

* fix ci tests

* skip server tests on macos and win unless SMP_SERVER is set

* fix win test

* fix win test

---------

Co-authored-by: Evgeny @ SimpleX Chat <259188159+evgeny-simplex@users.noreply.github.com>

packages/simplex-chat-nodejs/tests/zip.ts

@@ -4,15 +4,17 @@ const LOCAL_FILE_HEADER = 0x04034b50
 const CENTRAL_DIRECTORY_HEADER = 0x02014b50
 const END_OF_CENTRAL_DIRECTORY = 0x06054b50
 const ZIP_VERSION = 20
+const MADE_BY_UNIX = 3 << 8
 const LOCAL_HEADER_SIZE = 30
 const CENTRAL_ENTRY_SIZE = 46
 const END_RECORD_SIZE = 22
 
-export function storedZip(files: {[name: string]: string}): Buffer {
+export function storedZip(files: {[name: string]: string | {content: string, mode: number}}): Buffer {
   const local: Buffer[] = []
   const central: Buffer[] = []
   let offset = 0
-  for (const [name, content] of Object.entries(files)) {
+  for (const [name, file] of Object.entries(files)) {
+    const {content, mode} = typeof file === "string" ? {content: file, mode: 0} : file
     const nameBuf = Buffer.from(name)
     const data = Buffer.from(content)
     const crc = zlib.crc32(data)
@@ -26,12 +28,13 @@ export function storedZip(files: {[name: string]: string}): Buffer {
     local.push(header, nameBuf, data)
     const entry = Buffer.alloc(CENTRAL_ENTRY_SIZE)
     entry.writeUInt32LE(CENTRAL_DIRECTORY_HEADER, 0)
-    entry.writeUInt16LE(ZIP_VERSION, 4)
+    entry.writeUInt16LE(mode ? MADE_BY_UNIX | ZIP_VERSION : ZIP_VERSION, 4)
     entry.writeUInt16LE(ZIP_VERSION, 6)
     entry.writeUInt32LE(crc, 16)
     entry.writeUInt32LE(data.length, 20)
     entry.writeUInt32LE(data.length, 24)
     entry.writeUInt16LE(nameBuf.length, 28)
+    entry.writeUInt32LE(mode * 0x10000, 38)
     entry.writeUInt32LE(offset, 42)
     central.push(entry, nameBuf)
     offset += header.length + nameBuf.length + data.length