/**
 * @license Angular v12.2.13
 * (c) 2010-2021 Google LLC. https://angular.io/
 * License: MIT
 */

import { HttpBackend } from '@angular/common/http';
import { HttpEvent } from '@angular/common/http';
import { HttpHeaders } from '@angular/common/http';
import { HttpRequest } from '@angular/common/http';
import { Observable } from 'rxjs';
import { Observer } from 'rxjs';


/**
 * Configures `HttpClientTestingBackend` as the `HttpBackend` used by `HttpClient`.
 *
 * Inject `HttpTestingController` to expect and flush requests in your tests.
 *
 * @publicApi
 */
export declare class HttpClientTestingModule {
}

/**
 * Controller to be injected into tests, that allows for mocking and flushing
 * of requests.
 *
 * @publicApi
 */
export declare abstract class HttpTestingController {
    /**
     * Search for requests that match the given parameter, without any expectations.
     */
    abstract match(match: string | RequestMatch | ((req: HttpRequest<any>) => boolean)): TestRequest[];
    /**
     * Expect that a single request has been made which matches the given URL, and return its
     * mock.
     *
     * If no such request has been made, or more than one such request has been made, fail with an
     * error message including the given request description, if any.
     */
    abstract expectOne(url: string, description?: string): TestRequest;
    /**
     * Expect that a single request has been made which matches the given parameters, and return
     * its mock.
     *
     * If no such request has been made, or more than one such request has been made, fail with an
     * error message including the given request description, if any.
     */
    abstract expectOne(params: RequestMatch, description?: string): TestRequest;
    /**
     * Expect that a single request has been made which matches the given predicate function, and
     * return its mock.
     *
     * If no such request has been made, or more than one such request has been made, fail with an
     * error message including the given request description, if any.
     */
    abstract expectOne(matchFn: ((req: HttpRequest<any>) => boolean), description?: string): TestRequest;
    /**
     * Expect that a single request has been made which matches the given condition, and return
     * its mock.
     *
     * If no such request has been made, or more than one such request has been made, fail with an
     * error message including the given request description, if any.
     */
    abstract expectOne(match: string | RequestMatch | ((req: HttpRequest<any>) => boolean), description?: string): TestRequest;
    /**
     * Expect that no requests have been made which match the given URL.
     *
     * If a matching request has been made, fail with an error message including the given request
     * description, if any.
     */
    abstract expectNone(url: string, description?: string): void;
    /**
     * Expect that no requests have been made which match the given parameters.
     *
     * If a matching request has been made, fail with an error message including the given request
     * description, if any.
     */
    abstract expectNone(params: RequestMatch, description?: string): void;
    /**
     * Expect that no requests have been made which match the given predicate function.
     *
     * If a matching request has been made, fail with an error message including the given request
     * description, if any.
     */
    abstract expectNone(matchFn: ((req: HttpRequest<any>) => boolean), description?: string): void;
    /**
     * Expect that no requests have been made which match the given condition.
     *
     * If a matching request has been made, fail with an error message including the given request
     * description, if any.
     */
    abstract expectNone(match: string | RequestMatch | ((req: HttpRequest<any>) => boolean), description?: string): void;
    /**
     * Verify that no unmatched requests are outstanding.
     *
     * If any requests are outstanding, fail with an error message indicating which requests were not
     * handled.
     *
     * If `ignoreCancelled` is not set (the default), `verify()` will also fail if cancelled requests
     * were not explicitly matched.
     */
    abstract verify(opts?: {
        ignoreCancelled?: boolean;
    }): void;
}

/**
 * Defines a matcher for requests based on URL, method, or both.
 *
 * @publicApi
 */
export declare interface RequestMatch {
    method?: string;
    url?: string;
}

/**
 * A mock requests that was received and is ready to be answered.
 *
 * This interface allows access to the underlying `HttpRequest`, and allows
 * responding with `HttpEvent`s or `HttpErrorResponse`s.
 *
 * @publicApi
 */
export declare class TestRequest {
    request: HttpRequest<any>;
    private observer;
    /**
     * Whether the request was cancelled after it was sent.
     */
    get cancelled(): boolean;
    constructor(request: HttpRequest<any>, observer: Observer<HttpEvent<any>>);
    /**
     * Resolve the request by returning a body plus additional HTTP information (such as response
     * headers) if provided.
     * If the request specifies an expected body type, the body is converted into the requested type.
     * Otherwise, the body is converted to `JSON` by default.
     *
     * Both successful and unsuccessful responses can be delivered via `flush()`.
     */
    flush(body: ArrayBuffer | Blob | boolean | string | number | Object | (boolean | string | number | Object | null)[] | null, opts?: {
        headers?: HttpHeaders | {
            [name: string]: string | string[];
        };
        status?: number;
        statusText?: string;
    }): void;
    /**
     * Resolve the request by returning an `ErrorEvent` (e.g. simulating a network failure).
     */
    error(error: ErrorEvent, opts?: {
        headers?: HttpHeaders | {
            [name: string]: string | string[];
        };
        status?: number;
        statusText?: string;
    }): void;
    /**
     * Deliver an arbitrary `HttpEvent` (such as a progress event) on the response stream for this
     * request.
     */
    event(event: HttpEvent<any>): void;
}

/**
 * A testing backend for `HttpClient` which both acts as an `HttpBackend`
 * and as the `HttpTestingController`.
 *
 * `HttpClientTestingBackend` works by keeping a list of all open requests.
 * As requests come in, they're added to the list. Users can assert that specific
 * requests were made and then flush them. In the end, a verify() method asserts
 * that no unexpected requests were made.
 *
 *
 */
export declare class ɵangular_packages_common_http_testing_testing_a implements HttpBackend, HttpTestingController {
    /**
     * List of pending requests which have not yet been expected.
     */
    private open;
    /**
     * Handle an incoming request by queueing it in the list of open requests.
     */
    handle(req: HttpRequest<any>): Observable<HttpEvent<any>>;
    /**
     * Helper function to search for requests in the list of open requests.
     */
    private _match;
    /**
     * Search for requests in the list of open requests, and return all that match
     * without asserting anything about the number of matches.
     */
    match(match: string | RequestMatch | ((req: HttpRequest<any>) => boolean)): TestRequest[];
    /**
     * Expect that a single outstanding request matches the given matcher, and return
     * it.
     *
     * Requests returned through this API will no longer be in the list of open requests,
     * and thus will not match twice.
     */
    expectOne(match: string | RequestMatch | ((req: HttpRequest<any>) => boolean), description?: string): TestRequest;
    /**
     * Expect that no outstanding requests match the given matcher, and throw an error
     * if any do.
     */
    expectNone(match: string | RequestMatch | ((req: HttpRequest<any>) => boolean), description?: string): void;
    /**
     * Validate that there are no outstanding requests.
     */
    verify(opts?: {
        ignoreCancelled?: boolean;
    }): void;
    private descriptionFromMatcher;
}

export { }