diff --git a/script.test.js b/script.test.js
new file mode 100644
index 0000000..1b95c61
--- /dev/null
+++ b/script.test.js
@@ -0,0 +1,44 @@
+import { JSDOM } from 'jsdom';
+import { expect, it, describe } from 'jest';
+
+describe('generateQR function', () => {
+ let dom;
+
+ beforeEach(() => {
+ dom = new JSDOM(`
+
+
+
+
+
+
+
+
+ `);
+ global.document = dom.window.document;
+ });
+
+ afterEach(() => {
+ jest.resetModules();
+ });
+
+ it('should display alert when input is empty', () => {
+ document.getElementById('text').value = '';
+ document.getElementById('generateButton').click();
+ expect(document.getElementById('text').value).toBe('');
+ });
+
+ it('should throw error when input is not a string', () => {
+ document.getElementById('text').value = 123;
+ expect(() => document.getElementById('generateButton').click()).toThrowError('Input must be a string');
+ });
+
+ it('should display error message when generating QR code fails', () => {
+ const consoleError = jest.spyOn(console, 'error');
+ document.getElementById('text').value = 'test';
+ document.getElementById('qrcode').innerHTML = '';
+ document.getElementById('generateButton').click();
+ expect(consoleError).toHaveBeenCalledTimes(1);
+ expect(document.getElementById('qrcode').innerHTML).toBe('');
+ });
+});
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