[player] Add test file for ExternalAppGroupElementComponent

projects/player/src/app/components/elements/external-app-group-element/external-app-group-element.component.spec.ts

+import { ComponentFixture, TestBed } from '@angular/core/testing';
+import { Component, Input } from '@angular/core';
+import { CastPipe } from 'player/src/app/pipes/cast.pipe';
+import { UnitStateService } from 'player/src/app/services/unit-state.service';
+import {
+  ExternalAppGroupElementComponent
+} from 'player/src/app/components/elements/external-app-group-element/external-app-group-element.component';
+import { GeometryElement } from 'common/models/elements/geometry/geometry';
+
+describe('ExternalAppGroupElementComponent', () => {
+  let component: ExternalAppGroupElementComponent;
+  let fixture: ComponentFixture<ExternalAppGroupElementComponent>;
+  let mockUnitStateService: UnitStateService;
+
+  @Component({ selector: 'aspect-geometry', template: '' })
+  class GeometryStubComponent {
+    @Input() elementModel!: GeometryElement;
+  }
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      declarations: [
+        ExternalAppGroupElementComponent,
+        GeometryStubComponent,
+        CastPipe
+      ]
+    })
+      .compileComponents();
+  });
+
+  beforeEach(() => {
+    mockUnitStateService = TestBed.inject(UnitStateService);
+    fixture = TestBed.createComponent(ExternalAppGroupElementComponent);
+    spyOn(mockUnitStateService, 'registerElement');
+    spyOn(mockUnitStateService, 'getElementCodeById').withArgs('test').and
+      .returnValue({ id: 'test', status: 'NOT_REACHED', value: 0 });
+    component = fixture.componentInstance;
+    component.elementModel = new GeometryElement({
+      type: 'geometry',
+      id: 'test',
+      width: 0,
+      height: 0
+    });
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});