[AAE-8713] feat: create api registry with factories support (#7634)

Co-authored-by: Andras Popovics <popovics@ndras.hu>
Co-authored-by: Michal Dobkiewicz <michal.dobkiewicz@hyland.com>
Co-authored-by: Michał Dobkiewicz <ddohcim@users.noreply.github.com>

lib/core/api/api-clients.service.spec.ts

@@ -0,0 +1,66 @@
+/*!
+ * @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);
+    });
+
+});