feat: Add generated test case

test1.test.js

@@ -0,0 +1,30 @@
+```javascript
+describe('Spinner removal', () => {
+    test('Spinner should be removed after 1 second', () => {
+        document.body.innerHTML = '<div id="spinner" class="show"></div>';
+        const spinner = document.getElementById('spinner');
+        expect(spinner).not.toBeNull();
+        expect(spinner.classList.contains('show')).toBe(true);
+
+        // Simulate the setTimeout function
+        (function ($) {
+            "use strict";
+
+            // Spinner
+            var spinner = function () {
+                setTimeout(function () {
+                    if ($('#spinner').length > 0) {
+                        $('#spinner').removeClass('show');
+                    }
+                }, 1);
+            };
+            spinner();
+        })(jQuery);
+
+        jest.advanceTimersByTime(1001); //add 1ms to ensure timeout has passed
+
+        expect(spinner.classList.contains('show')).toBe(false);
+    });
+});
+
+```