diff --git a/script.test.js b/script.test.js
new file mode 100644
index 0000000..7e845e8
--- /dev/null
+++ b/script.test.js
@@ -0,0 +1,36 @@
+const { JSDOM } = require('jsdom');
+const { expect } = require('@jest/globals');
+const script = require('./script.js');
+
+describe('generateQR function', () => {
+ let dom;
+ let document;
+ let generateButton;
+ let textInput;
+
+ beforeEach(() => {
+ dom = new JSDOM('');
+ document = dom.window.document;
+ generateButton = document.getElementById("generateButton");
+ textInput = document.getElementById("text");
+ });
+
+ afterEach(() => {
+ dom = null;
+ document = null;
+ generateButton = null;
+ textInput = null;
+ });
+
+ it('should throw an error for non-string input', () => {
+ textInput.value = 123;
+ generateButton.dispatchEvent(new dom.window.Event('click'));
+ expect(() => script.generateQR()).toThrowError('Input must be a string');
+ });
+
+ it('should not throw an error for string input', () => {
+ textInput.value = 'test';
+ generateButton.dispatchEvent(new dom.window.Event('click'));
+ expect(() => script.generateQR()).not.toThrowError();
+ });
+});
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