[pitboss] phase 19: Track M.1 — ClassMethod end-to-end (all langs)

tests/dynamic_fixtures/class_method/javascript/benign.js

@@ -0,0 +1,15 @@
+// Phase 19 (Track M.1) — class-method benign control for JavaScript.
+//
+// UserService.run routes the input through execFileSync with argv form so
+// the shell never interprets the string.
+'use strict';
+const { execFileSync } = require('child_process');
+
+class UserService {
+    constructor() {}
+    run(input) {
+        return execFileSync('/bin/echo', [input]).toString();
+    }
+}
+
+module.exports = { UserService };