javascript - 是否可以从剧作家的定位器对象中获取选择器？

Question

我在 playwright 中使用页面对象模型开发自动化测试。因此，我正在构建一个类来保存我的定位器并公开定位器，但不一定是使用的选择器。定位器是否可以共享其选择器？

exports.MyWebPageModel = class MyWebPageModel {
  constructor(page) {
    this.myMultiSelect = page.locator('#select-group select');
    this.submitButton = page.locator('#submit-btn');
  }
}

test('validate multi-select submission', ({page}) -> {
  const myPage = new MyWebPageModel(page);
  const selectChoices = ['choice1', 'choice2', 'choice4'];
  await myPage.myMultiSelect.selectOptions(selectedChoices);
  Promise.all([
    page.waitForNavigation(),
    myPage.submitButton.click()
  ]);

  /* do tests on new page, click it's back button to return to previous page */

  const allSelectedValues = await page.$eval(myPage.myMultiSelect.???, e => Array.from(e.selectedOptions).map(option => option.value));  // get the selected options from select element
  expect(allSelectedValues).toEqual(selectedChoices);  // verify the selected options matches selectChoices.
});

Answer 1

这是一种方式，但不确定它是否适用于所有可能的定位器!

// Get a selector from a playwright locator
import { Locator } from "@playwright/test";
export function extractSelector(locator: Locator) {
    const selector = locator.toString();
    const parts = selector.split("@");
    if (parts.length !== 2) { throw Error("extractSelector: susupect that this is not a locator"); }
    if (parts[0] !== "Locator") { throw Error("extractSelector: did not find locator"); }
    return parts[1];
}