HTML〈多选[多选选项]=“已过滤的常用模板下拉列表”表单控件名称=“常用模板”[可搜索]=“真”（搜索文本更改）=“搜索常用模板（$event）”类=“多选”类=“常用模板”〉
运输系统

searchCommonTemplates(event: any) {
    this.filteredCommonTemplatesDropdown = this.dropdownSearch(event, this.commonTemplatesDropdown);
  }

spec.ts

fixture.whenStable().then(() => {
        spyOn(component, 'searchCommonTemplates');
        const select = fixture.debugElement.query(By.css('cxui-multi-select')).nativeElement;
        select.value = '';  // <-- select a new value
        select.dispatchEvent(new Event('searchTextChange'));
        fixture.detectChanges();
        expect(component.searchCommonTemplates).toHaveBeenCalled();