(Medium) - Decouple Side-Effects

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5 Aug '26, 09:28current

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	QUnit.test('Allows to filter the list of posts', (assert) => {
	const inMemoryDataSource = {
	findPostsTitle: () => Promise.resolve(['How to bake a cake', 'How to drive a car', 'A guide to fly']),
	};
	const ignoreOutHowTos = (postTitle) => postTitle.indexOf('How to') !== -1;

	const listOfPostTitles = ListOfPostTitles();
	listOfPostTitles.setDataSource(inMemoryDataSource);

	return listOfPostTitles.toHtml(ignoreOutHowTos).then((list) => {
	assert.strictEqual(list, '<ul><li>A guide to fly</li></ul>');
	});
	});