svelte/packages/svelte/tests/runtime-runes/samples/event-handler-invalid-values/_config.js

import { assertType } from 'vitest';
import { test } from '../../test';

export default test({
	mode: ['client'],

	compileOptions: {
		dev: true
	},

	test({ assert, target, warnings, logs }) {
		/** @type {any} */
		let error = null;

		const handler = (/** @type {any} */ e) => {
			error = e.error;
			e.stopImmediatePropagation();
		};

		window.addEventListener('error', handler, true);

		const [b1, b2, b3] = target.querySelectorAll('button');

		b1.click();
		assert.deepEqual(logs, []);
		assert.equal(error, null);

		error = null;
		logs.length = 0;

		b2.click();
		assert.deepEqual(logs, ['clicked']);
		assert.equal(error, null);

		error = null;
		logs.length = 0;

		b3.click();
		assert.deepEqual(logs, []);
		assert.deepEqual(warnings, [
			'`click` handler at main.svelte:10:17 should be a function. Did you mean to add a leading `() =>`?'
		]);
		assert.isNotNull(error);
		assert.match(error.message, /is not a function/);

		window.removeEventListener('error', handler, true);
	}
});