source: trip-planner-front/node_modules/@angular/common/esm2015/http/testing/src/backend.js

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { HttpEventType } from '@angular/common/http';
import { Injectable } from '@angular/core';
import { Observable } from 'rxjs';
import { TestRequest } from './request';
/**
 * 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 class HttpClientTestingBackend {
    constructor() {
        /**
         * List of pending requests which have not yet been expected.
         */
        this.open = [];
    }
    /**
     * Handle an incoming request by queueing it in the list of open requests.
     */
    handle(req) {
        return new Observable((observer) => {
            const testReq = new TestRequest(req, observer);
            this.open.push(testReq);
            observer.next({ type: HttpEventType.Sent });
            return () => {
                testReq._cancelled = true;
            };
        });
    }
    /**
     * Helper function to search for requests in the list of open requests.
     */
    _match(match) {
        if (typeof match === 'string') {
            return this.open.filter(testReq => testReq.request.urlWithParams === match);
        }
        else if (typeof match === 'function') {
            return this.open.filter(testReq => match(testReq.request));
        }
        else {
            return this.open.filter(testReq => (!match.method || testReq.request.method === match.method.toUpperCase()) &&
                (!match.url || testReq.request.urlWithParams === match.url));
        }
    }
    /**
     * Search for requests in the list of open requests, and return all that match
     * without asserting anything about the number of matches.
     */
    match(match) {
        const results = this._match(match);
        results.forEach(result => {
            const index = this.open.indexOf(result);
            if (index !== -1) {
                this.open.splice(index, 1);
            }
        });
        return results;
    }
    /**
     * 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, description) {
        description = description || this.descriptionFromMatcher(match);
        const matches = this.match(match);
        if (matches.length > 1) {
            throw new Error(`Expected one matching request for criteria "${description}", found ${matches.length} requests.`);
        }
        if (matches.length === 0) {
            let message = `Expected one matching request for criteria "${description}", found none.`;
            if (this.open.length > 0) {
                // Show the methods and URLs of open requests in the error, for convenience.
                const requests = this.open
                    .map(testReq => {
                    const url = testReq.request.urlWithParams;
                    const method = testReq.request.method;
                    return `${method} ${url}`;
                })
                    .join(', ');
                message += ` Requests received are: ${requests}.`;
            }
            throw new Error(message);
        }
        return matches[0];
    }
    /**
     * Expect that no outstanding requests match the given matcher, and throw an error
     * if any do.
     */
    expectNone(match, description) {
        description = description || this.descriptionFromMatcher(match);
        const matches = this.match(match);
        if (matches.length > 0) {
            throw new Error(`Expected zero matching requests for criteria "${description}", found ${matches.length}.`);
        }
    }
    /**
     * Validate that there are no outstanding requests.
     */
    verify(opts = {}) {
        let open = this.open;
        // It's possible that some requests may be cancelled, and this is expected.
        // The user can ask to ignore open requests which have been cancelled.
        if (opts.ignoreCancelled) {
            open = open.filter(testReq => !testReq.cancelled);
        }
        if (open.length > 0) {
            // Show the methods and URLs of open requests in the error, for convenience.
            const requests = open.map(testReq => {
                const url = testReq.request.urlWithParams.split('?')[0];
                const method = testReq.request.method;
                return `${method} ${url}`;
            })
                .join(', ');
            throw new Error(`Expected no open requests, found ${open.length}: ${requests}`);
        }
    }
    descriptionFromMatcher(matcher) {
        if (typeof matcher === 'string') {
            return `Match URL: ${matcher}`;
        }
        else if (typeof matcher === 'object') {
            const method = matcher.method || '(any)';
            const url = matcher.url || '(any)';
            return `Match method: ${method}, URL: ${url}`;
        }
        else {
            return `Match by function: ${matcher.name}`;
        }
    }
}
HttpClientTestingBackend.decorators = [
    { type: Injectable }
];
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Users can assert that specific\n * requests were made and then flush them. In the end, a verify() method asserts\n * that no unexpected requests were made.\n *\n *\n */\n@Injectable()\nexport class HttpClientTestingBackend implements HttpBackend, HttpTestingController {\n  /**\n   * List of pending requests which have not yet been expected.\n   */\n  private open: TestRequest[] = [];\n\n  /**\n   * Handle an incoming request by queueing it in the list of open requests.\n   */\n  handle(req: HttpRequest<any>): Observable<HttpEvent<any>> {\n    return new Observable((observer: Observer<any>) => {\n      const testReq = new TestRequest(req, observer);\n      this.open.push(testReq);\n      observer.next({type: HttpEventType.Sent} as HttpEvent<any>);\n      return () => {\n        testReq._cancelled = true;\n      };\n    });\n  }\n\n  /**\n   * Helper function to search for requests in the list of open requests.\n   */\n  private _match(match: string|RequestMatch|((req: HttpRequest<any>) => boolean)): TestRequest[] {\n    if (typeof match === 'string') {\n      return this.open.filter(testReq => testReq.request.urlWithParams === match);\n    } else if (typeof match === 'function') {\n      return this.open.filter(testReq => match(testReq.request));\n    } else {\n      return this.open.filter(\n          testReq => (!match.method || testReq.request.method === match.method.toUpperCase()) &&\n              (!match.url || testReq.request.urlWithParams === match.url));\n    }\n  }\n\n  /**\n   * Search for requests in the list of open requests, and return all that match\n   * without asserting anything about the number of matches.\n   */\n  match(match: string|RequestMatch|((req: HttpRequest<any>) => boolean)): TestRequest[] {\n    const results = this._match(match);\n    results.forEach(result => {\n      const index = this.open.indexOf(result);\n      if (index !== -1) {\n        this.open.splice(index, 1);\n      }\n    });\n    return results;\n  }\n\n  /**\n   * Expect that a single outstanding request matches the given matcher, and return\n   * it.\n   *\n   * Requests returned through this API will no longer be in the list of open requests,\n   * and thus will not match twice.\n   */\n  expectOne(match: string|RequestMatch|((req: HttpRequest<any>) => boolean), description?: string):\n      TestRequest {\n    description = description || this.descriptionFromMatcher(match);\n    const matches = this.match(match);\n    if (matches.length > 1) {\n      throw new Error(`Expected one matching request for criteria \"${description}\", found ${\n          matches.length} requests.`);\n    }\n    if (matches.length === 0) {\n      let message = `Expected one matching request for criteria \"${description}\", found none.`;\n      if (this.open.length > 0) {\n        // Show the methods and URLs of open requests in the error, for convenience.\n        const requests = this.open\n                             .map(testReq => {\n                               const url = testReq.request.urlWithParams;\n                               const method = testReq.request.method;\n                               return `${method} ${url}`;\n                             })\n                             .join(', ');\n        message += ` Requests received are: ${requests}.`;\n      }\n      throw new Error(message);\n    }\n    return matches[0];\n  }\n\n  /**\n   * Expect that no outstanding requests match the given matcher, and throw an error\n   * if any do.\n   */\n  expectNone(match: string|RequestMatch|((req: HttpRequest<any>) => boolean), description?: string):\n      void {\n    description = description || this.descriptionFromMatcher(match);\n    const matches = this.match(match);\n    if (matches.length > 0) {\n      throw new Error(`Expected zero matching requests for criteria \"${description}\", found ${\n          matches.length}.`);\n    }\n  }\n\n  /**\n   * Validate that there are no outstanding requests.\n   */\n  verify(opts: {ignoreCancelled?: boolean} = {}): void {\n    let open = this.open;\n    // It's possible that some requests may be cancelled, and this is expected.\n    // The user can ask to ignore open requests which have been cancelled.\n    if (opts.ignoreCancelled) {\n      open = open.filter(testReq => !testReq.cancelled);\n    }\n    if (open.length > 0) {\n      // Show the methods and URLs of open requests in the error, for convenience.\n      const requests = open.map(testReq => {\n                             const url = testReq.request.urlWithParams.split('?')[0];\n                             const method = testReq.request.method;\n                             return `${method} ${url}`;\n                           })\n                           .join(', ');\n      throw new Error(`Expected no open requests, found ${open.length}: ${requests}`);\n    }\n  }\n\n  private descriptionFromMatcher(matcher: string|RequestMatch|\n                                 ((req: HttpRequest<any>) => boolean)): string {\n    if (typeof matcher === 'string') {\n      return `Match URL: ${matcher}`;\n    } else if (typeof matcher === 'object') {\n      const method = matcher.method || '(any)';\n      const url = matcher.url || '(any)';\n      return `Match method: ${method}, URL: ${url}`;\n    } else {\n      return `Match by function: ${matcher.name}`;\n    }\n  }\n}\n"]}