login.po.ts

import BasePO from './base.po';

class LoginPO extends BasePO {
  private readonly $usernameInput = '#user-name';
  private readonly $passwordInput = '#password';
  private readonly $loginButton = '#login-button';
  private readonly $errorMessageContainer = '.error-message-container';

  async go() {
    await this.navigate('/');
  }

  async login(username: string, password: string) {
    await page.type(this.$usernameInput, username);
    await page.type(this.$passwordInput, password);
    await page.click(this.$loginButton);
  }

  async getErrorMessage(): Promise<string> {
    return this.getElementTextBySelector(this.$errorMessageContainer);
  }
}

export default new LoginPO();