enabled read cache

projects/ngx-material-entity/package.json

@@ -1,6 +1,6 @@
 {
     "name": "ngx-material-entity",
-    "version": "20.0.6",
+    "version": "20.0.7",
     "license": "MIT",
     "keywords": [
         "angular",

projects/ngx-material-entity/src/mocks/http-client.mock.ts

@@ -2,29 +2,29 @@
 /* eslint-disable typescript/no-unsafe-assignment */
 /* eslint-disable typescript/no-unsafe-member-access */
 /* eslint-disable typescript/no-explicit-any */
-
+import { HttpClient } from '@angular/common/http';
 import { Observable, of } from 'rxjs';
 
 /**
  * A Mock for the angular http-client. Is needed for testing crud inside a ngx-mat-entity-table.
  */
-export class HttpClientMock {
+export class HttpClientMock implements Pick<HttpClient, 'get' | 'post' | 'patch'> {
     exampleData: any[];
-    constructor(exampleData: any[]) {
-        this.exampleData = exampleData;
-    }
-    post(url: string, body: any): Observable<any> {
-        body.id = '1';
-        this.exampleData.push(body);
-        return of(body);
-    }
-    get(url: string): Observable<any> {
+
+    get: HttpClient['get'] = jest.fn((url) => {
         if (url.charAt(url.length - 2) == '/') {
             return of(this.exampleData[0]);
         }
         return of(this.exampleData);
-    }
-    patch(url: string, body: any): Observable<any> {
+    });
+
+    post: HttpClient['post'] = jest.fn((url, body) => {
+        body.id = '1';
+        this.exampleData.push(body);
+        return of(body);
+    });
+
+    patch: HttpClient['patch'] = jest.fn((url, body) => {
         const id: string = this.getIdFromUrl(url);
         const res: any = this.exampleData[this.exampleData.findIndex((e) => e.id === id)];
         for (const key in body) {
@@ -33,10 +33,15 @@ export class HttpClientMock {
             }
         }
         return of(res);
-    }
-    delete(url: string): Observable<any> {
+    });
+
+    delete: (url: string) => Observable<undefined> = jest.fn((url) => {
         this.exampleData.splice(this.exampleData.findIndex((e) => e.id === this.getIdFromUrl(url)), 1);
         return of(undefined);
+    });
+
+    constructor(exampleData: any[]) {
+        this.exampleData = exampleData;
     }
 
     /**

projects/ngx-material-entity/src/services/entity.service.test.ts

@@ -37,7 +37,8 @@ const simpleTestEntityApiData: SimpleTestEntity[] = [];
 const testEntityApiData: TestEntityWithoutCustomProperties[] = [];
 
 test('should request TestEntities', async () => {
-    const service: SimpleTestEntityService = new SimpleTestEntityService(new HttpClientMock(simpleTestEntityApiData) as unknown as HttpClient, mockInjector);
+    const http: HttpClientMock = new HttpClientMock(simpleTestEntityApiData);
+    const service: SimpleTestEntityService = new SimpleTestEntityService(http as unknown as HttpClient, mockInjector);
     const simpleTestEntity: SimpleTestEntity = new SimpleTestEntity({ id: '1', name: 'John Smith' });
     expect(service.baseUrl).toBe('http://api/test');
     expect(service.entities).toEqual([]);
@@ -57,6 +58,9 @@ test('should request TestEntities', async () => {
     await service.create(new SimpleTestEntity({ id: '2', name: 'Jane Smith' }));
     const entitiesFoundByRead: SimpleTestEntity[] = await service.read();
     expect(entitiesFoundByRead.length).toBe(2);
+    // should hit cache on second read
+    await service.read();
+    expect(http.get).toHaveBeenCalledTimes(1);
     // findById
     const findByIdService: SimpleTestEntityService = new SimpleTestEntityService(new HttpClientMock([]) as unknown as HttpClient, mockInjector);
     await findByIdService.create(new SimpleTestEntity({ id: '1', name: 'John Smith' }));

projects/ngx-material-entity/src/services/entity.service.ts

@@ -188,6 +188,9 @@ export abstract class EntityService<EntityType extends BaseEntityType<EntityType
      * @returns A Promise of all received Entities.
      */
     async read(baseUrl = this.baseUrl): Promise<EntityType[]> {
+        if (this.lastRead != undefined && (Date.now() - this.lastRead.getTime()) <= this.READ_EXPIRATION_IN_MS) {
+            return this.entitiesSubject.value;
+        }
         const e: EntityType[] = await firstValueFrom(this.http.get<EntityType[]>(baseUrl));
         this.entitiesSubject.next(e);
         this.lastRead = new Date();