import type { Control } from '../../Control.js';
declare module '../../expect.js' {
    interface Validators<T> {
        /**
         * Asserts that the provided predicate returns a truthy result for the given
         * value.
         *
         * Usually other validators are more appropriate, but this can be useful if
         * you are testing something custom.
         *
         * If you want to match a nested value, use the matcher
         * `expect.satisfies(predicate)` instead.
         *
         * @param predicate - The function for checking values.
         *
         * @example
         * ```ts
         * function isShark(value: unknown) {
         *   return value instanceof Fish && value.species === 'shark'
         * }
         * expect(new Fish('Bobby', { species: 'shark' })).toSatisfy(isShark)
         * ```
         */
        toSatisfy(predicate: (value: T) => boolean): void;
    }
}
export declare function toSatisfy(control: Control, predicate: (value: unknown) => boolean): void;
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