Class HostDir

packages/core/test/application_ref_spec.ts:223–229

        [ApplicationRef],
        (ref: ApplicationRef) => {
          @Directive({
            host: {'[attr.data-dir]': 'value'},
          })
          class HostDir {
            @Input()
            value = 'unset';
          }

          @Component({
            selector: 'bootstrap-app',