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41 changes: 41 additions & 0 deletions script.test.js
Original file line number Diff line number Diff line change
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import { JSDOM } from 'jsdom';
import { document } from 'jsdom';

const { JSDOM } = require('jsdom');

const dom = new JSDOM(`
<html>
<body>
<input id="text" type="text">
<div id="qrcode"></div>
<button id="generateButton">Generate QR</button>
<script src="script.js"></script>
</body>
</html>
`);

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);
});
});