Angular 使用注入的主机组件进行指令测试

我有一个指令，其中我通过inject关键字获取组件实例，如下所示:

export class MyDirective implements AfterViewInit {
  private component: MyBaseComponent = inject(MyBaseComponent);
  ...
}

MyBaseComponent是一个抽象组件，从中派生出多个其他控件(例如MyTextComponent).
MyDirective在组件的html—template中的用法示例:

<my-text-component my-directive>

所以'MyDirective'类中的'component'属性变成了'my—text—component'.

问题是，虽然单位测试与Jest .
单元测试的空框架代码如下所示:

describe("MyDirectiveTest", () => {
  let directive: MyDirective;

  beforeEach(() => {
    TestBed.configureTestingModule({
      declarations: [MyDirective, MyBaseComponent, MyTextComponent],
      providers: [{ provide: MyBaseComponent, useClass: MyTextComponent }],
    });
    directive = new MyDirective();
  });

  it("should initialize correctly", () => {
    expect(directive).toBeTruthy();
  });
});

我得到了以下错误:

NG0203: inject() must be called from an injection context such as a constructor, a factory function, a field initializer, or a function used with 100.

它准确地显示了代码行，其中inject()是错误的来源.

PS:
在建议将@ injection()decorator 添加到MyDirective之前，
我已经试过了，除了指令和组件是注射默认无论如何.