add unit tests

example/src/app/app.component.spec.ts

@@ -15,18 +15,23 @@ describe('AppComponent', () => {
     expect(app).toBeTruthy();
   });
 
-  it("should have as title 'example'", () => {
+  it("should have as title 'Disaggregation'", () => {
     const fixture = TestBed.createComponent(AppComponent);
     const app = fixture.componentInstance;
-    expect(app.title).toEqual('example');
+    expect(app.title).toEqual('Disaggregation');
   });
 
-  it('should render title', () => {
+  it('should render select menu', () => {
     const fixture = TestBed.createComponent(AppComponent);
     fixture.detectChanges();
     const compiled = fixture.nativeElement;
-    expect(compiled.querySelector('.content span').textContent).toContain(
-      'example app is running!'
-    );
+    expect(compiled.querySelector('select')).toBeTruthy();
+  });
+
+  it('should render svg', () => {
+    const fixture = TestBed.createComponent(AppComponent);
+    fixture.detectChanges();
+    const compiled = fixture.nativeElement;
+    expect(compiled.querySelector('svg')).toBeTruthy();
   });
 });