diff --git a/script.test.js b/script.test.js
new file mode 100644
index 0000000..11676f4
--- /dev/null
+++ b/script.test.js
@@ -0,0 +1,41 @@
+import { JSDOM } from 'jsdom';
+import { document } from 'jsdom';
+
+const { JSDOM } = require('jsdom');
+
+const dom = new JSDOM(`
+
+
+
+
+
+
+
+
+`);
+
+global.document = dom.window.document;
+
+import { generateQR } from './script.js';
+
+describe('generateQR function', () => {
+ it('should alert when input is empty', () => {
+ document.getElementById('text').value = '';
+ document.getElementById('generateButton').click();
+ expect(alert).toHaveBeenCalledTimes(1);
+ expect(alert).toHaveBeenCalledWith('Please enter text or URL');
+ });
+
+ it('should throw an error when input is not a string', () => {
+ document.getElementById('text').value = 123;
+ document.getElementById('generateButton').click();
+ }, (done) => {
+ setTimeout(() => {
+ expect(console.error).toHaveBeenCalledTimes(1);
+ expect(console.error).toHaveBeenCalledWith(
+ new Error('Input must be a string'),
+ );
+ done();
+ }, 0);
+ });
+});
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