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java - 在 PageFactory 中获取 NPE NullPointerException (Selenium+Java)

转载 作者:行者123 更新时间:2023-12-01 16:54:23 25 4
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我正在尝试为我的测试框架实现页面工厂模式,但在尝试访问元素或与元素交互时遇到 NPE。顺便说一句,我使用 Spring 依赖注入(inject)在测试之间共享 WebDriver 实例(而不是构造函数),因此我在非静态 block 内实现了 PageFactory initElements() 以便能够访问它。顺便说一句,如果没有 PageFactory(没有 @FindBy 和带有注释的 By 项目),它就可以完美工作。这是我的 PO.class 代码:

@Component
public class HomePage extends BasePage {
@Autowired
private DatabasesPage databasesPage;
@Autowired
private UserAccountsPage userAccountsPage;

public static Logger log = LogManager.getLogger(HomePage.class.getName());
private String themeLabelColorHex = "#235a81";
private Select themeList;

/* private By databasesHeaderButton = By.cssSelector("#topmenu > li:nth-child(1)"),
userAccountsHeaderButton = By.cssSelector("#topmenu > li:nth-child(4)"),
languagesDropdown = By.id("sel-lang"),
themeDropdown = By.name("set_theme"),
themeLabel = By.xpath("//*[@id='li_select_theme']//a");*/

@FindBy(how = How.CSS, css = "#topmenu > li:nth-child(1)") private WebElement databasesHeaderButton;
@FindBy(how = How.CSS, css = "#topmenu > li:nth-child(4)") private WebElement userAccountsHeaderButton;
@FindBy(how = How.ID, id = "sel-lang") private WebElement languagesDropdown;
@FindBy(how = How.NAME, name = "set_theme") private WebElement themeDropdown;
@FindBy(how = How.XPATH, xpath = "//*[@id='li_select_theme']//a") private WebElement themeLabel;

{
PageFactory.initElements(driver,this);
System.out.println("**************** THIS IS A NON-STATIC FIELD REACHED BY DEP INJ ****************");
}

public HomePage openUp() {
String propertiesPath = get(System.getProperty("user.dir"),
"src", "main", "java", "base", "configuration", "config.properties").normalize().toString();

try {
Properties properties = new Properties();
properties.load(new FileInputStream(propertiesPath));
String url = properties.getProperty("url");

driver.get(url);
}
catch ( IOException e) {
log.error("Properties file is not found");
log.error("\n " + ExceptionUtils.getStackTrace(e));
}

return this;
}

public DatabasesPage goToDatabasesPage() {
databasesHeaderButton.click();
return databasesPage;
}

public UserAccountsPage goToUserAccountsPage() {
userAccountsHeaderButton.click();
return userAccountsPage;
}

public HomePage changeLanguage(String langValue) {
try {
Select langList = new Select(languagesDropdown);
String currentLang = langList.getFirstSelectedOption().getAttribute("value");
if (langValue.equalsIgnoreCase(currentLang)) log.warn("Desired language is already selected!");
else langList.selectByValue(langValue);
}
catch (Exception e) {
log.error("\n" + ExceptionUtils.getStackTrace(e));
}

return this;
}

public HomePage changeTheme(String themeValue) {
try {
themeList = new Select(themeDropdown);
String currentTheme = themeList.getFirstSelectedOption().getAttribute("value");

if (themeValue.equalsIgnoreCase(currentTheme))
log.warn("Desired theme is already selected!");
else {
themeList.selectByValue(themeValue);
driver.navigate().refresh();
themeLabelColorHex = "#0000ff";
}
}
catch (Exception e) {
log.error("\n" + ExceptionUtils.getStackTrace(e));
}

return this;
}

public HomePage setDefaultTheme() {
themeList = new Select(themeDropdown);
themeList.selectByValue("pmahomme");
themeLabelColorHex = "#235a81";
return this;
}

public boolean isLanguageChanged() {
return true; // TO DO
}

public boolean isThemeChanged() {
String RGBColor = themeLabel.getCssValue("color"); // I'm getting NPE here somehow
String HexColor = Color.fromString(RGBColor).asHex();

return HexColor.equalsIgnoreCase(themeLabelColorHex);
}

}

这是我的测试方法:

@Test
@Description("Change website theme")
public void changeWebsiteTheme() {
homePage.openUp().changeTheme("original");
assertThat(true).isEqualTo(homePage.isThemeChanged()); // and it fails here but it didn't perform previous step - changeTheme();

homePage.setDefaultTheme();
assertThat(true).isEqualTo(homePage.isThemeChanged());
}

enter code here

最佳答案

要启动在构造函数中编写的PageFactory,必须通过创建类的对象来启动它。 this帮助我实现了这一目标。

关于java - 在 PageFactory 中获取 NPE NullPointerException (Selenium+Java),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/61619808/

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