java - TestNG @BeforeClass 初始化代码在 Test 之前未运行

Question

我正在使用 Selenium、TestNG 编写测试代码。当我在同一页面上重复这些操作时，我尝试在 @BeforeClass 部分设置一些元素。但我收到空指针异常。有办法解决这个问题吗？

public class RunTest {
private static WebElement user;
private static WebElement pass;
private static WebElement login;

@BeforeClass
public static void driveraBaglan() {
    //Driver is declared here. I removed it to give the simple code. 
    user = driver.findElement(By.id("user"));
    pass = driver.findElement(By.id("pass"));
    login = driver.findElement(By.xpath("//button[contains(.,'Log In')]"));
    statusMessage = driver.findElement(By.id("login-status-message")).getText();

}
@Test(priority=1)
public void loginNoInfo() {
        user.clear();
        pass.clear();
}

我在 user.clear() 、 pass.clear() 和 login.click() 函数上遇到空指针错误。页面上的所有测试都在同一页面上运行。我不想在页面上的每个测试中使用重复的“按 id 查找元素”标签。

Answer 1

@BeforeTest: The annotated method will be run before any test method belonging to the classes inside the <test> tag is run.
@BeforeClass: The annotated method will be run before the first test method in the current class is invoked

尝试更改注释

@BeforeTest
public static void driveraBaglan() {
    //Driver is declared here. I removed it to give the simple code. 
    user = driver.findElement(By.id("user"));
    pass = driver.findElement(By.id("pass"));
    login = driver.findElement(By.xpath("//button[contains(.,'Log In')]"));
    statusMessage = driver.findElement(By.id("login-status-message")).getText();

}