在不同的测试类之间共享TestNG设置 - Selenium Java

时间:2016-11-22 05:54:35

标签: java selenium testing nullpointerexception testng

如何在不同的测试类之间共享相同的selenium测试?我一直得到nullpointexception,无法弄清楚如何解决它。我已经在这个问题上存了一段时间,并在几个小时内搜索了这个问题,但仍然没有解决它。请帮忙。

这是我的设置类

import static org.testng.Assert.fail;

import java.util.concurrent.TimeUnit;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.chrome.ChromeOptions;
import org.testng.annotations.AfterTest;
import org.testng.annotations.BeforeTest;

public class SettingsClass {

WebDriver driver;

@BeforeTest
public void setUp() throws Exception {
    System.setProperty("webdriver.chrome.driver", "chromeDriver_path");
    ChromeOptions options = new ChromeOptions();
    options.addArguments("--start-maximized", "chrome.switches", "--disable-extensions");
    WebDriver driver = new ChromeDriver(options);
    driver.manage().deleteAllCookies(); // delete all cookies
    driver.manage().timeouts().implicitlyWait(2, TimeUnit.SECONDS);
    driver.manage().window().maximize();
}

@AfterTest
public void tearDown() throws Exception {
    driver.quit();
}

这是我的测试类

import org.openqa.selenium.By;
import org.testng.annotations.Test;

import com.Settings;

public class ClassA extends SettingsClass {

boolean acceptNextAlert = true;
StringBuffer verificationErrors = new StringBuffer();

@Test
public void test() throws Exception {
    driver.get("http://www.fakeurl.com");
    driver.findElement(By.id("username")).sendKeys("admin");
    driver.findElement(By.id("password")).sendKeys("admin");
    driver.findElement(By.name("submit")).click();
}

}

以下是我不断收到的错误消息

java.lang.NullPointerException
at com.ClassA.test(ClassA.java:15)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:85)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:659)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:845)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1153)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:125)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:108)
at org.testng.TestRunner.privateRun(TestRunner.java:771)
at org.testng.TestRunner.run(TestRunner.java:621)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:357)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:352)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:310)
at org.testng.SuiteRunner.run(SuiteRunner.java:259)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1199)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1124)
at org.testng.TestNG.run(TestNG.java:1032)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:132)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:236)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:81)

非常感谢任何建议和帮助。提前谢谢!

2 个答案:

答案 0 :(得分:0)

尝试,

public class SettingsClass {

    public WebDriver driver;

    @BeforeTest
    public void setUp() throws Exception {
        System.setProperty("webdriver.chrome.driver", "chromeDriver_path");
        ChromeOptions options = new ChromeOptions();
        options.addArguments("--start-maximized", "chrome.switches", "--disable-extensions");
        driver = new ChromeDriver(options);
        driver.manage().deleteAllCookies(); // delete all cookies
        driver.manage().timeouts().implicitlyWait(2, TimeUnit.SECONDS);
        driver.manage().window().maximize();
    }

    @AfterTest
    public void tearDown() throws Exception {
        driver.quit();
    }
}

答案 1 :(得分:0)

这种依赖<access origin="*" subdomains="true"></access> <tizen:privilege name="http://tizen.org/privilege/internet"/> 实例化基类中的@BeforeTest实例的方法仍然存在问题,并且所有测试类都扩展了这个基类(WebDriver in这种情况)因为默认情况下,SettingsClass方法被设计为在套件xml文件中每@BeforeTest只涉及一次。因此,如果您有两个或更多此类基类的子类(在这种情况下为<test>),您将最终在测试中看到相同的SettingsClass,即

如果您执行以下操作,您将看到相同的NullPointerException

  • 创建一个名为NullPointerException的新类,该类也扩展ClassB(和)
  • 在您的套件xml文件中的同一SettingsClass标记中加入ClassAClassB

您应该考虑转移到<test>模型中,该模型将通过以下机制之一进行初始化:

  • 通过ThreadLocal带注释的方法
  • 通过TestNG侦听器,例如@BeforeMethod
  • 通过IInvokedMethodListener#beforeInvocation接口的实现。

您可以参考我创建的博客文章,其中讨论了使用TestNG监听器和org.testng.IHookable变量来管理并发webdriver实例。请看看是否有帮助。

博客链接:https://rationaleemotions.wordpress.com/2013/07/31/parallel-webdriver-executions-using-testng/