import { ComponentFixture } from '@angular/core/testing';
import { TsCheckboxComponent } from '@terminus/ui/checkbox';
/**
 * Get all TsCheckboxComponent instances
 *
 * @param fixture - The component fixture
 * @returns The array of TsCheckboxComponent instances
 */
export declare function getAllCheckboxInstances(fixture: ComponentFixture<any>): TsCheckboxComponent[];
/**
 * Get a single TsCheckboxComponent instance
 *
 * @param fixture - The component fixture
 * @param index - The index of the checkbox to return
 * @returns The TsCheckboxComponent instance
 */
export declare function getCheckboxInstance(fixture: ComponentFixture<any>, index?: number): TsCheckboxComponent;
/**
 * Get a single TsCheckboxComponent element
 *
 * @param fixture - The component fixture
 * @param index - The index of the checkbox to return
 * @returns The TsCheckboxComponent element
 */
export declare function getCheckboxElement(fixture: ComponentFixture<any>, index?: number): HTMLElement;
/**
 * Toggle a single checkbox
 *
 * @param fixture - The component fixture
 * @param index - The index of the checkbox to return
 * @returns The Promise from fixture.whenStable
 */
export declare function toggleCheckbox(fixture: ComponentFixture<any>, index?: number): Promise<any>;