Add services

frontend/ng-karaoqueue/src/app/entry-service.service.spec.ts

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+import { TestBed } from '@angular/core/testing';
+
+import { EntryServiceService } from './entry-service.service';
+
+describe('EntryServiceService', () => {
+  let service: EntryServiceService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(EntryServiceService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});

frontend/ng-karaoqueue/src/app/entry-service.service.ts

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+import { Injectable } from '@angular/core';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class EntryServiceService {
+
+  constructor() { }
+}

frontend/ng-karaoqueue/src/app/song-service.service.spec.ts

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+import { TestBed } from '@angular/core/testing';
+
+import { SongServiceService } from './song-service.service';
+
+describe('SongServiceService', () => {
+  let service: SongServiceService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(SongServiceService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});

frontend/ng-karaoqueue/src/app/song-service.service.ts

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+import { Injectable } from '@angular/core';
+import { HttpClient, HttpHeaders } from "@angular/common/http";
+import { Song } from './models/song.model';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class SongServiceService {
+
+  constructor(
+    private http: HttpClient
+  ) {}
+
+  searchSongByText(text:string):Array<Song> {
+      return [new Song()];
+  }
+}