import { ComponentRef, DebugElement } from '@angular/core';
import { QueryOptions, QueryType } from '../types';
export declare function getChildren<R>(debugElementRoot: DebugElement): (directiveOrSelector: QueryType, options?: QueryOptions<R>) => R[];
/**
 * @internal
 * Set props on a component. This is used in `createComponent` and `createRoutingFactory` since we have direct access to the componentRef.
 */
export declare function setProps<T, K extends string | number | symbol, V>(componentRef: ComponentRef<T>, key: K, value: V): T & {
    [KEY in K]: V;
};
export declare function setProps<T, KV>(componentRef: ComponentRef<T>, keyValues?: KV): T & KV;
/**
 * @internal
 * Set props on a host component. This is used in `createHostFactory`, `createDirectiveFactory` and `createPipeFactory`.
 * As these factories contain a custom host component, we set properties on this host component rather than the tested component itself.
 * Setting props on the component that's being tested is not possible as we don't have access to its componentRef.
 */
export declare function setHostProps<T, K extends string | number | symbol, V>(componentRef: ComponentRef<T>, key: K, value: V): T & {
    [KEY in K]: V;
};
export declare function setHostProps<T, KV>(componentRef: ComponentRef<T>, keyValues?: KV): T & KV;