Question

我需要实现一件事：每当我开始测试时，我都必须登录系统。我创建了一个应该运行此Login过程的类。我能够向这个类发送适当的值并且能够登录，但在那之后，我在我的第二个类（它自己运行测试）上接收到NullPointerException。它看起来根本无法看到浏览器窗口。请帮助我编写这个类，以便我可以在任意多个类中重复使用Login类。

登录之一：

public class Login {

    private static WebDriver driver;
    public static void Find_Fields (String path,String login, String password) {
        driver = Driver.get(path);
        WebElement login_field = driver.findElement(By.id("abc"));
        login_field.sendKeys(login);
        //Find Password Field on Start page
        WebElement password_field = driver.findElement(By.id("abc"));
        password_field.sendKeys(password);
        //Find Login Button
        WebElement login_button = driver.findElement(By.xpath("abc"));
        login_button.click();
    }
}

public class Testing {

    private static WebDriver driver;
    @BeforeClass
    public static void a_setup(){
        //here I'm trying to run Login with parameters
        Login fields = new Login();
        fields.Find_Fields(LOGIN_PATH, LOGIN, PASSWORD);
    }

    @Test
    public void b_Press_Login_Button(){
        //Here I'm trying to start testing in session started from a_setup()
        WebElement keyword = driver.findElement("..."));
        keyword.sendKeys("...");
    }

    @AfterClass
    public static void Close(){
        driver.quit();
        driver.close();
    }
}

Answer 1

您需要使用浏览器对象初始化驱动程序。这样的事情应该有效：

public static void Find_Fields (String path,String login, String password)
{
    driver = new FirefoxDriver();
    driver.get(path);
    WebElement login_field = driver.findElement(By.id("abc"));
    login_field.sendKeys(login);
    //Find Password Field on Start page
    WebElement password_field = driver.findElement(By.id("abc"));
    password_field.sendKeys(password);
    //Find Login Button
    WebElement login_button = driver.findElement(By.xpath("abc"));
    login_button.click();
}

Answer 2

您有两个独立的WebDriver字段，每个字段对应一个字段。您已经在Login中初始化了一个，但是您没有将引用传递回Testing类。其中一个解决方案是将WebDriver作为参数传递给Login构造函数：

public class Login {

    private WebDriver driver;

    public void Find_Fields (String path,String login, String password) {
        driver.get(path);
        //(...) rest of this method is unchanged
    }

    public Login(WebDriver driver) {
        this.driver = driver;
    }
}

public class Testing {

    private static WebDriver driver;
    @BeforeClass
    public static void a_setup(){
        driver = new FirefoxDriver();        //initialize the driver
        Login fields = new Login(driver);    //pass the instance of WebDriver to login class
        fields.Find_Fields(LOGIN_PATH, LOGIN, PASSWORD);
    }

    //(...) rest of the class remains unchanged
}

的webdriver。使用参数化类后无法运行测试

2 个答案: