fix: setup Jest with TS

packages/utils/tests/commands.test.ts

@@ -0,0 +1,41 @@
+import { buildFileCheckCmd } from '../src/commands'
+
+describe('buildFileCheckCmd function', () => {
+  it('builds the file check command correctly', () => {
+    const testcases = [
+      {
+        input: { path: '/etc/passwd', type: 'file' },
+        output: ['test', '-f', '/etc/passwd'],
+      },
+      {
+        input: { path: '/etc', type: 'folder' },
+        output: ['test', '-d', '/etc'],
+      },
+      {
+        input: { path: '/tmp/socket', type: 'socket' },
+        output: ['test', '-S', '/tmp/socket'],
+      },
+      {
+        input: { path: '/tmp/link', type: 'link' },
+        output: ['test', '-L', '/tmp/link'],
+      },
+      {
+        input: { path: '/unknown', type: 'unknown' },
+        output: ['test', '-e', '/unknown'],
+      },
+      // Add some injection tests
+      {
+        input: { path: '/etc/passwd;ls', type: 'file' },
+        output: ['test', '-f', '/etc/passwdls'],
+      },
+      {
+        input: { path: '/etc/passwd && ls', type: 'file' },
+        output: ['test', '-f', '/etc/passwdls'],
+      },
+    ]
+
+    testcases.forEach(({ input, output }) => {
+      expect(buildFileCheckCmd(input)).toStrictEqual(output)
+    })
+  })
+})