svelte/test/runtime/samples/element-source-location/_config.js

import path from 'path';

export default {
	dev: true,

	test(assert, component, target) {
		const h1 = target.querySelector('h1');
		const p = target.querySelector('p');

		assert.deepEqual(h1.__svelte_meta.loc, {
			file: path.relative(process.cwd(), path.resolve(__dirname, 'main.html')),
			line: 0,
			column: 0,
			char: 0
		});

		assert.deepEqual(p.__svelte_meta.loc, {
			file: path.relative(process.cwd(), path.resolve(__dirname, 'Foo.html')),
			line: 1,
			column: 1,
			char: 7
		});
	}
};