import { BaseMatcher } from "./matchers/base.matcher";
import { ComponentFixtureLike, GenericFunction, GenericObject, MatcherChainStarter, Selector } from "./types";
export declare class Piumino {
    private fixture;
    /**
     * Initialize Piumino.
     *
     * @param fixture - The TestBed fixture to use for all expects.
     */
    init(fixture: ComponentFixtureLike): void;
    /**
     * Select an element that is a child of the fixture's component to expect something on.
     *
     * @param selector - The CSS selector to find the element.
     */
    expect(selector: Selector): MatcherChainStarter<BaseMatcher>;
    /**
     * Replace a function implementation on the provided object with the provided implementation.
     *
     * @param obj - The object to replace the function on.
     * @param func - The name of the function to replace.
     * @param implementation - The implementation to replace the function with.
     */
    replaceFunction(obj: GenericObject, func: string, implementation: GenericFunction): void;
    /**
     * Restore a function implementation on the provided object with the original implementation.\
     * NOTE: Does nothing if the function was never replaced.
     *
     * @param obj - The object to restore the function on.
     * @param func - The name of the function to restore.
     */
    restoreFunction(obj: GenericObject, func: string): void;
    private getFixture;
    private getErrorStack;
}