title: How to mock an @Input() object in angular2?
body: <p>I have looked on the angular2 website, as well as checked many SO posts and I could not find an example that illustrates my use case.</p>
  <p>I want to mock data from an object that has an @Input() tag. My component looks like this:</p>
  <pre class="lang-js prettyprint-override"><code>    ...
      export class DriftInfoDisplayComponent implements OnInit {
      
        showThisDriftInfo:boolean;
        headerText:string;
        informationText:string;
        linkText:string;
        @Input() inputInfo:DriftInfo;
      
        constructor(){}
      
        ngOnInit() {
          this.headerText = this.inputInfo.headerText;
          this.informationText = this.inputInfo.informationText;
          this.linkText = this.inputInfo.linkText;
          this.showThisDriftInfo = this.inputInfo.visible;
        }
      
        toggleDriftInfo(){
          this.showThisDriftInfo = ! this.showThisDriftInfo;
        }
      }
  </code></pre>
  <p>My unit test file for this component looks like this:</p>
  <pre class="lang-js prettyprint-override"><code>    describe('DriftInfoComponent', () =&gt; {
        let component: DriftInfoDisplayComponent;
        let fixture: ComponentFixture&lt;DriftInfoDisplayComponent&gt;;
      
      
        beforeEach(async(() =&gt; {
          TestBed.configureTestingModule({
            declarations: [ DriftInfoDisplayComponent ]
          })
          .compileComponents();
        }));
      
        beforeEach(() =&gt; {
          fixture = TestBed.createComponent(DriftInfoDisplayComponent);
          component = fixture.componentInstance;
          fixture.detectChanges();
        });
      
        it('should create', () =&gt; {
          const fixture = TestBed.createComponent(DriftInfoDisplayComponent);
          const drift = fixture.debugElement.componentInstance;
          expect(drift).toBeTruthy();
        });
      });
  </code></pre>
  <p>I would like to write a test that mocks the inputInfo:DriftInfo and its object in DriftInfoDisplayComponent and its properties so that I can test that this data is being displayed properly in the html template. How can I do this?</p>
  <p>Thanks for any help that may be provided!</p>