base class for Page Object

page-object-base.ts

// ./objects/base/page-object-base.ts
export interface IComponentObject {
  [key: string]: any;
  isRendered(): Promise<any>;
}

export abstract class PageObjectBase {
  element: string;
  features: IComponentObject[];
  url: string;

  async waitUntilRendered(): Promise<any> {
    try {
      await this.verifyRenderRequirements();

      const promises = this.features.map(feature => feature.render);

      return Promise.all(promises);
    } catch (e) {
      return Promise.reject(e);
    }
  }
  
  verifyRenderRequirements() {
    if (this.features.length === 0) {
      return Promise.reject(`${this.element} has no registered features or page render requirements`);
    }
  }
}