import { Assertion } from "./Assertion";
/**
 * Encapsulates assertion methods applicable to values of type boolean
 */
export declare class BooleanAssertion extends Assertion<boolean> {
    constructor(actual: boolean);
    /**
     * Check if the value is `true`.
     *
     * @example
     * ```
     * expect(tsIsCool).toBeTrue();
     * ```
     *
     * @returns the assertion instance
     */
    toBeTrue(): this;
    /**
     * Check if the value is `false`.
     *
     * @example
     * ```
     * expect(pigsFly).toBeFalse();
     * ```
     *
     * @returns the assertion instance
     */
    toBeFalse(): this;
}