fix(shared): rewrite test to avoid spawnSync

Author: markscott-ms

shared/src/docify/template-bundles/docusaurus/package.spec.ts

@@ -2,7 +2,7 @@ import { describe, it, expect, afterAll } from 'vitest';
 import { copyFileSync, mkdtempSync, rmSync } from 'fs';
 import { join } from 'path';
 import { tmpdir } from 'os';
-import { spawnSync } from 'child_process';
+import { spawn } from 'child_process';
 
 const TEMPLATE_PACKAGE_JSON = join(__dirname, 'package.json');
 
@@ -18,15 +18,17 @@ describe('docusaurus template bundle dependencies', () => {
         rmSync(tmpDir, { recursive: true, force: true });
     });
 
-    it('should resolve without peer dependency conflicts (long running test)', () => {
+    it('should resolve without peer dependency conflicts (long running test)', async () => {
         copyFileSync(TEMPLATE_PACKAGE_JSON, join(tmpDir, 'package.json'));
 
-        const result = spawnSync(
-            'npm',
-            ['install', '--package-lock-only', '--prefix', tmpDir],
-            { encoding: 'utf-8' }
-        );
+        const exitCode = await new Promise<number>((resolve, reject) => {
+            const stderr: string[] = [];
+            const proc = spawn('npm', ['install', '--package-lock-only', '--prefix', tmpDir]);
+            proc.stderr?.on('data', (chunk: Buffer) => stderr.push(chunk.toString()));
+            proc.on('close', (code) => resolve(code ?? 1));
+            proc.on('error', reject);
+        });
 
-        expect(result.status, result.stderr).toBe(0);
-    }, 180_000);
+        expect(exitCode).toBe(0);
+    }, 120_000);
 });