大家好：我面临下一个问题：我正在使用Page Factory与Cucumber，Selenium WebDriver一起工作。出现在这里的错误来自“步骤定义”端：
java.lang.NullPointerException
at pages.page_First.startNavigation(page_First.java:33)
at stepdefs.stepdefs_First.iGoToGoogle(stepdefs_First.java:20)
at ✽.I go to Google (file:src/test/resources/features/first.feature:10)
这是发生问题的代码（StepDefinition）的一部分：
@Given("I go to Google")
public void iGoToGoogle() {
page_first.startNavigation();
}
从页面的角度来看，这是代码：
public class page_First extends BasePage {
public page_First() {
PageFactory.initElements(driver, this);
}
///////////////////////WEB ELEMENTS///////////////////////
@FindBy(name = "q")
private WebElement searchText;
@FindBy(name="btnK")
private WebElement searchButton;
//////////////////////BASE METHODS//////////////////////
public void startNavigation() {
driver.get(PropertyManager.getInstance().getURL());
}
public void search(String search) {
setTextAs(searchText, search);
}
public void enterButton (){
clickElement(searchButton);
}
}
功能文件：
Scenario Outline: Search google.com to verify google search is working
Given I go to Google
When I query for "<search>" cucumber spring selenium
And click search
Then google page title should become the first page
Examples:
| search |
| Cucumber Selenium |
这是我的浏览器类：
public class Browser {
// Take the instance of WebDriver
public static WebDriver driver;
public WebDriver initializeBrowser() throws IOException {
//Properties taken from config.properties
String browser = PropertyManager.getInstance().getBrowser();
if(browser.equals("chrome")) {
WebDriverManager.chromedriver().setup();
driver = new ChromeDriver();
} else if(browser.equals("firefox")) {
WebDriverManager.firefoxdriver().setup();
driver = new FirefoxDriver();
} else if(browser.equals("ie")) {
WebDriverManager.iedriver().setup();
driver = new InternetExplorerDriver();
} else if(browser.equals("edge")) {
WebDriverManager.edgedriver().setup();
driver = new EdgeDriver();
} else if(browser.equals("opera")) {
WebDriverManager.operadriver().setup();
driver = new OperaDriver();
} else {
System.setProperty("webdriver.safari.driver","/usr/bin/safaridriver");
driver = new SafariDriver();
}
System.out.println("-----> Proceed to initialize driver <-----");
driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
driver.manage().window().maximize();
return driver;
}
}
这是我的配置属性读取器类：
public class PropertyManager {
private static PropertyManager instance;
private static final Object lock = new Object();
private static String propertyFilePath = System.getProperty("user.dir") + "//src//main//resources//data//config.properties";
///////////////////////////// DATA IN PROPERTIES //////////////////////////
private static String url;
private static String browser;
//Create a Singleton instance. We need only one instance of Property Manager.
public static PropertyManager getInstance () {
if (instance == null) {
synchronized (lock) {
instance = new PropertyManager();
instance.loadData();
}
}
return instance;
}
//Get all configuration data and assign to related fields.
private void loadData() {
//Declare a properties object
Properties prop = new Properties();
//Read config.properties file
try {
prop.load(new FileInputStream(propertyFilePath));
} catch (IOException e) {
System.out.println("Configuration properties file cannot be found");
}
//Get properties from config.properties
url = prop.getProperty("url");
browser = prop.getProperty("browser");
}
public String getURL () {
return url;
}
public String getBrowser () {
return browser;
}
}
我忘记了这一点，我的步骤定义类：
public class stepdefs_First {
private page_First page_first = PageFactory.initElements(Browser.driver, page_First.class);
@Given("I go to Google")
public void iGoToGoogle() {
page_first.startNavigation();
}
@When("I query for {string} cucumber spring selenium")
public void iQueryForCucumberSpringSelenium(String search) throws Exception {
page_first.search(search);
}
@And("click search")
public void clickSearch() {
page_first.enterButton();
}
@Then("google page title should become the first page")
public void googlePageTitleShouldBecomeTheFirstPage() {
System.out.println("All OK");
}
}
顺便说一句，这是我的config.properties
browser = firefox
url = https://www.google.cl
拜托我需要你的帮忙。
最佳答案
初始化页面对象类
page_First page_first=new page_First();