/*!
 * @license
 * Copyright 2019 Alfresco Software, Ltd.
 *
 * Licensed 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 { AboutApi } from '@alfresco/js-api';
import { TestBed } from '@angular/core/testing';
import { ApiClientFactory, API_CLIENT_FACTORY_TOKEN } from './api-client.factory';
import { ApiClientsService } from './api-clients.service';
import { Constructor } from './types';

class MockApiClientFactory implements ApiClientFactory {
    create<T>(apiClass: Constructor<T>): T {
        return new apiClass();
    }
}

describe('ApiService', () => {
    let apiService: ApiClientsService;

    beforeEach(() => {
        TestBed.configureTestingModule({
            providers: [
                ApiClientsService,
                { provide: API_CLIENT_FACTORY_TOKEN, useClass: MockApiClientFactory }
            ]
        });
        apiService = TestBed.inject(ApiClientsService);
    });

    it('should add api to registry', () => {
        apiService.register('ActivitiClient.about', AboutApi);

        expect(apiService.get('ActivitiClient.about') instanceof AboutApi).toBeTruthy();
    });

    it('should throw error if we try to get unregisterd API', () => {
        expect(() => apiService.get('ActivitiClient.about')).toThrowError();

        apiService.register('ActivitiClient.about', AboutApi);

        expect(() => apiService.get('ActivitiClient.about')).not.toThrowError();
    });

    it('should create only single instance of API', () => {
        apiService.register('ActivitiClient.about', AboutApi);

        const a = apiService.get('ActivitiClient.about');
        const b = apiService.get('ActivitiClient.about');

        expect(a).toBe(b);
    });

});