import { ValidationError } from '.';
import type { Path } from './path';
export declare class ObjectAssertion {
    private readonly obj;
    private readonly path;
    private _errors;
    constructor(obj: Record<string, any>, path: Path);
    catch: (...errors: ValidationError[]) => void;
    get errors(): ValidationError[];
    /**
     * Asserts the key exists in the object. You probably shouldn't call this
     * function directly. Instead, use `$.object`, `$.number`, `$.string`, etc.
     */
    exists: (key: string) => boolean;
    /**
     * Asserts the key exists in the object and its value is a plain object. if
     * no key is provided, it asserts the object itself.
     */
    object: (key?: string) => boolean;
    /**
     * Asserts the key exists in the object and its value is a string.
     */
    string: (key: string) => boolean;
    /**
     * Asserts the key exists in the object and its value is a number.
     */
    number: (key: string, optional?: boolean) => boolean;
    /**
     * Asserts the key exists in the object and its value is an array. You don't
     * need to manually call this function before `$.each` or `$.maxLength`.
     */
    array: (key: string) => boolean;
    /**
     * Asserts the value of the key is one of the expected values.
     */
    enum: (key: string, expected: string[]) => boolean;
    /**
     * Asserts the array value of the object key is empty. If the value isn't an
     * array, the function captures a type error and returns false.
     */
    empty: (key: string) => boolean;
    /**
     * Asserts the length of the value of the object key is at least `min`. If the
     * value isn't an array, the function captures a type error and returns false.
     */
    minLength: (key: string, min: number) => boolean;
    /**
     * Asserts the object has no additional properties other than the ones
     * specified
     */
    noAdditionalProperties: (properties: string[]) => boolean;
    /**
     * Iterates over the value of the key and assert each item. If the value isn't
     * an array, the function captures a type error and safely exits.
     *
     * To maintain compatibility with previous implementation, we stop early if we
     * find any errors.
     */
    each: (key: string, assert: (item: any, path: Path) => ValidationError[]) => void;
}