Updated the files.

my-app/node_modules/@angular/common/http/testing/index.d.ts

@@ -0,0 +1,185 @@
+/**
+ * @license Angular v17.1.3
+ * (c) 2010-2022 Google LLC. https://angular.io/
+ * License: MIT
+ */
+
+
+import { HttpEvent } from '@angular/common/http';
+import { HttpHeaders } from '@angular/common/http';
+import { HttpRequest } from '@angular/common/http';
+import * as i0 from '@angular/core';
+import * as i1 from '@angular/common/http';
+import { Observer } from 'rxjs';
+import { Provider } from '@angular/core';
+
+/**
+ * Configures `HttpClientTestingBackend` as the `HttpBackend` used by `HttpClient`.
+ *
+ * Inject `HttpTestingController` to expect and flush requests in your tests.
+ *
+ * @publicApi
+ */
+export declare class HttpClientTestingModule {
+    static ɵfac: i0.ɵɵFactoryDeclaration<HttpClientTestingModule, never>;
+    static ɵmod: i0.ɵɵNgModuleDeclaration<HttpClientTestingModule, never, [typeof i1.HttpClientModule], never>;
+    static ɵinj: i0.ɵɵInjectorDeclaration<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;
+}
+
+export declare function provideHttpClientTesting(): Provider[];
+
+/**
+ * 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).
+     * @deprecated Http requests never emit an `ErrorEvent`. Please specify a `ProgressEvent`.
+     */
+    error(error: ErrorEvent, opts?: TestRequestErrorOptions): void;
+    /**
+     * Resolve the request by returning an `ProgressEvent` (e.g. simulating a network failure).
+     */
+    error(error: ProgressEvent, opts?: TestRequestErrorOptions): void;
+    /**
+     * Deliver an arbitrary `HttpEvent` (such as a progress event) on the response stream for this
+     * request.
+     */
+    event(event: HttpEvent<any>): void;
+}
+
+/**
+ * Type that describes options that can be used to create an error
+ * in `TestRequest`.
+ */
+declare type TestRequestErrorOptions = {
+    headers?: HttpHeaders | {
+        [name: string]: string | string[];
+    };
+    status?: number;
+    statusText?: string;
+};
+
+export { }