const VALUES = Array.from('abcdefghijklmnopqrstuvwxyz');

function permute() {
	const values = VALUES.slice();
	const number = Math.floor(Math.random() * VALUES.length);
	const permuted = [];
	for (let i = 0; i < number; i++) {
		permuted.push(...values.splice(Math.floor(Math.random() * (number - i)), 1));
	}

	return {
		data: permuted,
		expected: permuted.length ? `(${permuted.join(')(')})` : ''
	};
}

let step = permute();

export default {
	get props() {
		return { values: step.data };
	},

	get html() {
		return step.expected;
	},

	test({ assert, component, target }) {
		for (let i = 0; i < 100; i++) {
			step = permute();
			component.values = step.data;
			assert.htmlEqual(target.innerHTML, step.expected);
		}
	}
};