定位器和页面 Object Model

Question

I want to use Playwright's Locators in my page objects. I found an example for Javascript (stripped for brevity):

import { Page } from '@playwright/test';

export class TodoPage {
  listItems = this.page.locator('.todo-list li');

  constructor(public readonly page: Page) { }
}

Trying to do the same in my Java code:

public class LoginPage {

    private Page page;

    private Locator loginButton = this.page.locator("#loginButton");

    public LoginPage(Page page){
        this.page = page;
    }
}

throws a null pointer exception, because page is not yet initiated, when initializing loginButton .

I could do

private Locator loginButton;

public LoginPage(Page page){
    this.page = page;

    loginButton =  this.page.locator("#loginButton");
}

but this would become kind of lenghty/ messy, for large page object classes.

Any ideas on how to do that in Java?

Thanks!

Answer 1

You could put the Locator definition inside the constructor:

public class LoginPage {

    private Page page;
    private Locator loginButton;

    public LoginPage(Page page){
        this.page = page;
        this.loginButton = this.page.locator("#loginButton");
    }
}

Answer 2

I could create a Locator class:

public class LoginPageLocators {

    public Locator LoginButton;

    public LoginPageLocators(Page page) {
        LoginButton = page.locator("#loginButton");
    }
}

And then access the locators in the page object class via eg locators.LoginButton.click() .

It wouldn't avoid the clumsiness/ messiness, but at least hide it from the page object class.