// ============= Test Cases =============
import type { Equal, Expect } from './test-utils'
type cases = [
Expect<Equal<Push<[], 1>, [1]>>,
Expect<Equal<Push<[1, 2], '3'>, [1, 2, '3']>>,
Expect<Equal<Push<['1', 2, '3'], boolean>, ['1', 2, '3', boolean]>>,
]
// ============= Your Code Here =============
type Push<T extends any[], U> = [...T, U]
// usage