src/app/services/http/http.service.spec.ts

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
import {MockBackend, MockConnection} from '@angular/http/testing';
import {AUTHORIZATION_HEADER, HttpClient, TENANT_HEADER, USER_HEADER} from './http.service';
import {
  BaseRequestOptions,
  ConnectionBackend,
  Headers,
  Http,
  RequestOptions,
  RequestOptionsArgs,
  Response,
  ResponseOptions
} from '@angular/http';
import {Store} from '@ngrx/store';
import {Observable} from 'rxjs/Observable';
import {ReflectiveInjector} from '@angular/core';

describe('Test http client', () => {

  const tenant = 'Reynholm Industries';

  const authenticationState = {
    username: 'test',
    tenant: tenant,
    authentication: {
      tokenType: 'iDontCare',
      accessToken: 'accessToken',
      accessTokenExpiration: new Date().toISOString(),
      refreshTokenExpiration: new Date().toISOString(),
      passwordExpiration: new Date().toISOString(),
      passwordChangedBy: 'moss'
    }
  };

  const doPostRequest = function (httpClient: HttpClient, options?: RequestOptionsArgs): void {
    httpClient.post('/test', {}, options).subscribe(() => {
    });
  };

  describe('Test http header', () => {

    beforeEach(() => {
      this.injector = ReflectiveInjector.resolveAndCreate([
        {provide: ConnectionBackend, useClass: MockBackend},
        {provide: RequestOptions, useClass: BaseRequestOptions},
        {
          provide: Store, useClass: class {
          select = jasmine.createSpy('select').and.returnValue(Observable.of(authenticationState));
        }
        },
        Http,
        HttpClient,
      ]);
      this.httpClient = this.injector.get(HttpClient);
      this.backend = this.injector.get(ConnectionBackend) as MockBackend;
    });

    it('should send tenant header', (done: DoneFn) => {
      this.backend.connections.subscribe((connection: MockConnection) => {
        expect(connection.request.headers.get(TENANT_HEADER)).toBe(tenant);
        done();
      });
      doPostRequest(this.httpClient);
    });

    it('should send authorization header when logged in', (done: DoneFn) => {
      this.backend.connections.subscribe((connection: MockConnection) => {
        expect(connection.request.headers.get(USER_HEADER)).toBe(authenticationState.username);
        expect(connection.request.headers.get(AUTHORIZATION_HEADER)).toBe(authenticationState.authentication.accessToken);
        done();
      });
      doPostRequest(this.httpClient);
    });

    it('should send custom headers', (done: DoneFn) => {
      this.backend.connections.subscribe((connection: MockConnection) => {
        expect(connection.request.headers.get('Content-Type')).toBe('multipart/form-data');
        done();
      });
      doPostRequest(this.httpClient, {
        headers: new Headers({
          'Content-Type': 'multipart/form-data'
        })
      });
    });

    it('should return json if json', (done: DoneFn) => {
      const expectedResponse: any = {
        text: 'text'
      };
      this.backend.connections.subscribe((connection: MockConnection) => {
        const response = new Response(new ResponseOptions({
          body: JSON.stringify(expectedResponse)
        }));
        connection.mockRespond(response);
      });

      this.httpClient.post('/test', {}).subscribe(response => {
        expect(response).toEqual(expectedResponse);
        done();
      });
    });

    it('should return text if no json', (done: DoneFn) => {
      this.backend.connections.subscribe((connection: MockConnection) => {
        const response = new Response(new ResponseOptions({
          body: 'text'
        }));
        connection.mockRespond(response);
      });

      this.httpClient.post('/test', {}).subscribe(text => {
        expect(text).toEqual('text');
        done();
      });
    });

  });

});