/**
 * Assert whether a child selector is or is not present in a parent node.
 *
 * @param parentNode - A parent DOM node
 * @param childSelector - A DOM selector for the child node
 * @param isPresent - Indicating whether to assert is present or is not present
 */
export declare const assertNodeContains: (parentNode: Element, childSelector: string, isPresent?: boolean) => void;
/**
 * Assert whether node is or is not a child of the document.body.
 *
 * @param selector - A DOM selector for the parent node
 * @param isPresent - Indicating whether to assert is present or is not present
 */
export declare const assertBodyContains: (selector: string, isPresent?: boolean) => void;