WebDriver無法初始化

Question

運行@testCase時出現NullPointerException
1.在FrameworkTestCases.class-> @BeforeClass中，我初始化所選Webdriver的實例。 當我將FrameworkTestCases.class作為jUnit測試啟動時，瀏覽器正在運行，但是當我到達testCase時，它顯示NullPointerException。 是什么原因？ 我還使用了帶有2個參數的構造函數來將驅動程序從Generic.class繼承到LoginPageFactory.class，但是什么也沒發生。

這是我的FrameworkTestCases類：

public class FrameworkTestCases {

static WebDriver driver;
private static String baseURl = "https://management.tacticlicks.com/";
static LoginPageFactory loginPage;
static Generic generic;
//WebDriver driver;
//static LoginPageFactory lpFactory;


@BeforeClass
public static void setUp() {        
    generic = new Generic(driver);
    generic.getDriver(baseURl, "chrome");
}

@Test
public void test() {
    System.out.println("Executing test");

    loginPage
    .fillUsernameField("ivailostefanov1989@gmail.com")
    .fillPasswordField("astral8909")
    .clickSubmit(); 
}


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

public class LoginPageFactory extends Generic {

public LoginPageFactory(WebDriver driver2, Class<LoginPageFactory> class1) {
    super(driver2, class1);
    // TODO Auto-generated constructor stub
}

WebDriver driver;

@FindBy(name="email") //.//*[@id='login']/div[1]/div/div/table/tbody/tr/td[2]/div[1]/form/div[1]/input
WebElement loginUsernameField;

@FindBy(name="password")
WebElement loginPasswordField;

@FindBy(tagName="button")
WebElement loginSubmitButton;

public LoginPageFactory(WebDriver driver) {
    System.out.println("LoginPageFactory");
    this.driver = driver;
    PageFactory.initElements(driver, this);
}

public LoginPageFactory fillUsernameField(String username) {
    System.out.println("Before field initializing");
    WebElement emailField = driver.findElement(By.name("email"));
    emailField.click();
    emailField.sendKeys(username);
    return this;
}

public LoginPageFactory fillPasswordField(String password) {
    loginPasswordField.click();
    loginPasswordField.clear();
    loginPasswordField.sendKeys(password);
    return this;
}

public LoginPageFactory clickSubmit() {
    loginSubmitButton.click();
    return this;
}   
}

public class Generic {

WebDriver driver;

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

public Generic(WebDriver driver2, Class<LoginPageFactory> class1) {
    // TODO Auto-generated constructor stub
}

private void getBrowser(String browser) {

    if (browser.equalsIgnoreCase("Firefox")) {
        File chromeDriver = new File("C:\\Users\\Ivo\\Desktop\\geckodriver.exe");
        System.setProperty("webdriver.gecko.driver", chromeDriver.getAbsolutePath());
        driver = new FirefoxDriver();
    } else if (browser.equalsIgnoreCase("Chrome")) {

        //set chromedriver property
        File chromeDriver = new File("C:\\Users\\Ivo\\Desktop\\chromedriver.exe");
        System.setProperty("webdriver.chrome.driver", chromeDriver.getAbsolutePath());
        driver = new ChromeDriver();


    } else {
        System.out.println("Browser cannot be launched");
    }

}

public WebDriver getDriver(String appUrl, String browser) {
    getBrowser(browser);
    driver.manage().timeouts().implicitlyWait(20, TimeUnit.SECONDS);
    driver.manage().window().maximize();
    driver.get(appUrl);
    return driver;
}
}

Answer 1

您缺少@BeforeClass方法中的變量分配。

更改

@BeforeClass
public static void setUp() {        
    generic = new Generic(driver);
    generic.getDriver(baseURl, "chrome");
}

至

@BeforeClass
public static void setUp() {        
    generic = new Generic(driver);
    driver = generic.getDriver(baseURl, "chrome");
}

同樣，您也沒有創建LoginPageFactory類的任何實例。 您已經創建了一個變量static LoginPageFactory loginPage; 但沒有初始化它（至少在提供的代碼中沒有）。 在方法中

@Test
public void test() {
    System.out.println("Executing test");

    //add this line of code to initialize elements via Page Factory
    loginPage = new LoginPageFactory(driver);

    loginPage
    .fillUsernameField("ivailostefanov1989@gmail.com")
    .fillPasswordField("astral8909")
    .clickSubmit(); 
}