ag-Grid:如何从单元测试访问 gridApi?

ag-Grid: How can I access the gridApi from a Unit Test?

我正在尝试对包含对 gridApi 的调用的函数进行单元测试,例如 this.gridApi.getSelectedRows();。当单元测试到这一行时,它给出了这个错误:Failed: Cannot read property 'getSelectedRows' of undefined,因为gridApi还没有被定义。

如何从单元测试中定义 gridApi?它通常在 onGridReady 函数中这样定义:

  onGridReady(params) {
    this.gridApi = params.api;
    this.gridColumnApi = params.columnApi;
    this.gridApi.sizeColumnsToFit();
  }

是否可以从单元测试中触发 onGridReady?我不知道可以向它发送什么参数。有没有其他方法来定义 this.gridApi 呢?

this.gridApi 和 this.gridColumnApi 在测试用例中自动初始化。为此需要从 'ag-grid-angular' 导入 AgGridModule。 并初始化组件,与以下代码相同:

let component: MyComponent;
let fixture: ComponentFixture<MyComponent>;

beforeEach(async(() => {
    TestBed.configureTestingModule({
        declarations: [MyComponent],
        imports: [
            AgGridModule.withComponents([])
        ]
    }).compileComponents();

    fixture = TestBed.createComponent(MyComponent);
    component = fixture.componentInstance;
    fixture.detectChanges();
}));

在文件顶部测试 onGridReady Import。

import { GridOptions } from "ag-grid-community";

并声明一个变量

gridOptions: GridOptions = <GridOptions>{};

编写测试用例

it('onGridReady called', () => {
const data = {
    api: component.gridOptions.api,
    columnApi: component.gridOptions.columnApi
}
component.onGridReady(params);
expect(component.gridApi).not.toBeNull();
expect(component.gridColumnApi).not.toBeNull();
});