学习POM在 selenium 中的作用并试图理解这种行为。当我这样设置我的测试类时：

public class HomePageTests extends BaseTest {
    private HomePage homePage;

    @BeforeMethod
    public void setupTest() {
        homePage = new HomePage(driver);
    }

    @Test
    public void checkPageTitleTest() {
        //act
        homePage.clickOnMainPageIconButton();

        //get
        String pageTitle = homePage.getMainPageTitle(driver);

        //verify
        assertThat(pageTitle).isEqualTo(HOME_PAGE_TITLE);
    }
}

一切似乎都在按预期工作。然而，当我试图创建没有@BeforeMethod

public class HomePageTests extends BaseTest {
    private HomePage homePage = new HomePage(driver);

    @Test
    public void checkPageTitleTest() {
        //act
        homePage.clickOnMainPageIconButton();

        //get
        String pageTitle = homePage.getMainPageTitle(driver);

        //verify
        assertThat(pageTitle).isEqualTo(HOME_PAGE_TITLE);
    }
}

我总是收到此错误：java.lang.NullPointerException: Cannot invoke "org.openqa.selenium.SearchContext.findElement(org.openqa.selenium.By)" because "this.searchContext" is null
我的主页如下所示：

public class HomePage extends BasePage{
    public HomePage(WebDriver driver) {
        super(driver);
    }

    @FindBy(className = "header__logo__link")
    WebElement mainPageLogo;

    public void clickOnMainPageIconButton(){
        mainPageLogo.click();
    }

    public String getMainPageTitle(WebDriver driver){
        return driver.getTitle();
    }

}

我可以做些什么来摆脱这个重复的块@BeforeMethod。链接到我的current repository与项目，如果我错过了一些可能是至关重要的描述问题。
尝试在HomePage中创建初始化类，但IDE已将其标记为错误。