Reproduce runtime error

.github/workflows/check.yaml

@@ -21,8 +21,8 @@ jobs:
           node-version-file: '.node-version'
           cache: 'pnpm'
 
-      - name: Install dependencies
-        run: make install
+      - name: Install dependencies & build application
+        run: make
 
       - name: Lint & format
         run: make lint

src/index.test.ts

@@ -0,0 +1,14 @@
+import { exec } from 'child_process';
+import path from 'path';
+
+describe('CLI', () => {
+  it('should display help message without errors', (done) => {
+    const indexPath = path.resolve(__dirname, '../dist/index.js');
+    exec(`node ${indexPath} --help`, (error, stdout, stderr) => {
+      expect(error).toBeNull();
+      expect(stderr).toBe('');
+      expect(stdout).toContain('Usage: aws-cost');
+      done();
+    });
+  });
+});