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