fix: Skip lipo if native module is already universal. Add native module fixtures for lipo tests (#126)

* fix: when native modules are already universal, don't lipo. adds `node-mac-permissions` fixture from https://github.com/codebytere/node-mac-permissions and resolves 3 `it.todo` test cases

* add test `different app dirs with different macho files (shim and lipo)`

* add additional test

* PR feedback

* gotta close `fd`

* use `stream` to read first 4 bytes. copy native fixture before packing into asar to leverage `unpack: "**/*.node"` properly.

* convert params to object

* rename `createTestApp` to `createStagingAppDir` and add jsdoc to the function

* compiler error from merge conflict

* update snapshots

* update snapshots

* only check x64Content since it's the tmp app

* compile macho binaries at runtime using hellow-world.c for fixtures in lipo tests

* Update jest.setup.ts

Co-authored-by: Erik Moura <erikian@erikian.dev>

* Update jest.setup.ts

Co-authored-by: Erik Moura <erikian@erikian.dev>

* remove unstable properties for specific keys

* force redo

* update snapshots

* stripping only hello-world from snapshot and only hash from macho-specific asar integrity

* optimize logic :)

---------

Co-authored-by: Erik Moura <erikian@erikian.dev>

jest.setup.ts

@@ -1,10 +1,34 @@
+import { execFileSync } from 'child_process';
 import * as fs from 'fs-extra';
 import * as path from 'path';
-import { appsDir, asarsDir, templateApp } from './test/util';
+import { appsDir, asarsDir, fixtureDir, templateApp } from './test/util';
+
+// generates binaries from hello-world.c
+// hello-world-universal, hello-world-x86_64, hello-world-arm64
+const generateMachO = () => {
+  const src = path.resolve(fixtureDir, 'hello-world.c');
+
+  const outputFiles = ['x86_64', 'arm64'].map((arch) => {
+    const machO = path.resolve(appsDir, `hello-world-${arch === 'x86_64' ? 'x64' : arch}`);
+    execFileSync('clang', ['-arch', arch, '-o', machO, src]);
+    return machO;
+  });
+
+  execFileSync('lipo', [
+    ...outputFiles,
+    '-create',
+    '-output',
+    path.resolve(appsDir, 'hello-world-universal'),
+  ]);
+};
 
 export default async () => {
   await fs.remove(appsDir);
   await fs.mkdirp(appsDir);
+
+  // generate mach-o binaries to be leveraged in lipo tests
+  generateMachO();
+
   await templateApp('Arm64Asar.app', 'arm64', async (appPath) => {
     await fs.copy(
       path.resolve(asarsDir, 'app.asar'),