import type { TypeMatcher } from './matcher';
/**
 * Match an array.
 *
 * Supports nested matchers.
 *
 * @param containing If given, the matched array has to contain ALL of these
 *   elements in ANY order.
 *
 * @example
 * const fn = mock<(arr: number[]) => number>();
 * when(() => fn(It.isArray())).thenReturn(1);
 * when(() => fn(It.isArray([2, 3]))).thenReturn(2);
 *
 * fn({ length: 1, 0: 42 }) // throws
 * fn([]) === 1
 * fn([3, 2, 1]) === 2
 *
 * @example
 * It.isArray([It.isString({ containing: 'foobar' })])
 */
export declare const isArray: <T extends unknown[]>(containing?: T) => TypeMatcher<T>;