java - 接收错误 "org.openqa.selenium.NoSuchSessionException: Session ID is null. Using WebDriver after calling quit()?"

Question

我遇到了一个问题，我的测试在浏览器中按方法执行操作，但在 TestNG 中显示为失败，并出现标题中提到的错误。请查看并帮助纠正此问题。我对自动化还很陌生，没能解决这个问题。

基类:

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Enumeration;
import java.util.List;
import java.util.Properties;
import java.util.concurrent.TimeUnit;

import org.openqa.selenium.By;
import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.ie.InternetExplorerDriver;
import org.openqa.selenium.support.ui.Select;
import org.testng.Assert;
import org.testng.annotations.Test;

public class TestListBase {
    String chromeDriverPath = "src/main/resources/chromedriver.exe";
    String ieDriverPath = "src/main/resources/IEDriverServer.exe";
    WebDriver driver;
    Properties testData;
    static String testSuitName;
    static String baseFolder = "config\\";

    public static Object[][] findPropertyFiles(String testName) {       
        // First read test suite name.
        Properties p = readProperties(baseFolder + "TestSuitToRun.txt");
        testSuitName = p.getProperty("TestSuitName");

        // Read test properties     
        File[] files = new File("config\\" + testSuitName + "\\" + testName + "\\").listFiles();
        List<String> result = new ArrayList<String>();

        for (File file : files) {
            if (file.isFile()) {
                result.add(file.getAbsolutePath());
            }
        }

        Object[][] resultarray = new Object[result.size()][1];
        for (int i=0; i<result.size(); i++) {
            resultarray[i][0] = result.get(i);
        }
        return resultarray;
    }

    private static Properties readProperties(String path) {
        Properties properties = new Properties();
        InputStream input = null;
        try {
            input = new FileInputStream(path);
            properties.load(input);
        }
        catch (Exception ex) {

        }
        finally {
            if (input != null) {
                try {
                    input.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }           
        }
        return properties;
    }

    protected void readTestData(String testDataPath) {
        // Read base properties
        Properties baseProperties = readProperties(baseFolder + testSuitName + "\\baseProperties.txt");
        testData = readProperties(testDataPath);
        testData.putAll(baseProperties);        
    }

    protected void waitForBrowser() {
        waitForBrowser(1);
    }

    protected void waitForBrowser(int timeoutSec) {
        try {
            Thread.sleep(timeoutSec * 1000);
        } catch (InterruptedException e) {
            System.out.println("got interrupted!");

        }
    }

    protected void setDriver(WebDriver driverparam) {
        this.driver = driverparam;
    }

    protected WebDriver getDriver() {
        return this.driver;
    }


    protected void intializeDriver() {
        String browserType = testData.getProperty("browser");
        if (browserType.equalsIgnoreCase("chrome")) {
            System.setProperty("webdriver.chrome.driver", chromeDriverPath);
            driver = new ChromeDriver();        

        }
        else if (browserType.equalsIgnoreCase("ie")) {
            System.setProperty("webdriver.ie.driver", ieDriverPath);
            driver = new InternetExplorerDriver();
        }
        else if (browserType.equalsIgnoreCase("firefox")) {
            driver = new FirefoxDriver();           
        }
        else {
            System.out.println("Unknown Browser Type:" + browserType);
            return;
        }

        driver.manage().deleteAllCookies();
        driver.manage().window().maximize();
        driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
        driver.manage().timeouts().pageLoadTimeout(30, TimeUnit.SECONDS);

    }

子类:

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.List;
import java.util.Properties;
import java.util.concurrent.TimeUnit;

import org.openqa.selenium.By;
import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.Keys;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.ie.InternetExplorerDriver;
import org.openqa.selenium.support.ui.Select;
import org.testng.Assert;
import org.testng.annotations.AfterSuite;
import org.testng.annotations.BeforeSuite;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;

public class AddressableTarget extends TestListBase {
    @DataProvider(name = "PropertyFile")     
    public static Object[][] getPropertyFiles() { 
            return findPropertyFiles("AddressableTarget");
    }

    @Test(priority = 0, dataProvider = "PropertyFile")
    public void runTest(String filename) {
        readTestData(filename);
        intializeDriver();

        openBrowser();
        login();
        gotoAddressableTarget();
        terminateBrowser();

    }

    @Test(priority = 1)
    void openBrowser() {
        driver.get(testData.getProperty("baseUrl"));


    }

    @Test(priority = 2)
    public void login() {
        driver.findElement(By.xpath("//input[@name='logonIDmanual']"))
                .sendKeys(testData.getProperty("user"));
        driver.findElement(By.xpath("//input[@type='password']"))
                .sendKeys(testData.getProperty("password"));
        driver.findElement(By.xpath("//input[@type='submit']"))
                .click();
        waitForBrowser();
    }

    @Test(priority = 3)
    public void gotoAddressableTarget() {
        driver.findElement(By.xpath("//span[contains(text(), 'Addressable Target')]")).click();
        waitForBrowser();
    }

    @Test(priority = 4)
    public void terminateBrowser() {
        driver.quit();
    }

}

控制台中第一个失败的方法:

[RemoteTestNG] detected TestNG version 6.10.0
[TestNG] Running:
  C:\AppData\Local\Temp\testng-eclipse--1577707927\testng-customsuite.xml

Starting ChromeDriver 2.43.600210 (68dcf5eebde37173d4027fa8635e332711d2874a) on port 20262
Only local connections are allowed.
Nov 13, 2018 10:56:22 PM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Detected dialect: OSS
PASSED: runTest("C:\eclipse-workspace\Automation\config\QA\AddressableTarget\AddressableTarget.txt")
PASSED: terminateBrowser
FAILED: openBrowser
org.openqa.selenium.NoSuchSessionException: Session ID is null. Using WebDriver after calling quit()?
Build info: version: '3.11.0', revision: 'e59cfb3', time: '2018-03-11T20:26:55.152Z'
System info: host: 'USLJTMWF72', ip: '10.5.152.19', os.name: 'Windows 8.1', os.arch: 'amd64', os.version: '6.3', java.version: '1.8.0_181'
Driver info: driver.version: RemoteWebDriver
    at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:125)
    at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:83)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:545)
    at org.openqa.selenium.remote.RemoteWebDriver.get(RemoteWebDriver.java:273)
    at com.AddressableTarget.openBrowser(AddressableTarget.java:47)
    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:104)
    at org.testng.internal.Invoker.invokeMethod(Invoker.java:645)
    at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:851)
    at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1177)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:129)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:112)
    at org.testng.TestRunner.privateRun(TestRunner.java:756)
    at org.testng.TestRunner.run(TestRunner.java:610)
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:387)
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:382)
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:340)
    at org.testng.SuiteRunner.run(SuiteRunner.java:289)
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1293)
    at org.testng.TestNG.runSuitesLocally(TestNG.java:1218)
    at org.testng.TestNG.runSuites(TestNG.java:1133)
    at org.testng.TestNG.run(TestNG.java:1104)
    at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:114)
    at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
    at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)

查看我的 POM 内部:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>AdVantics</groupId>
  <artifactId>AdVanticsQAAutomation</artifactId>
  <version>0.0.1-SNAPSHOT</version>

  <dependencies>
  <!-- Selenium -->
  <dependency>
     <groupId>org.seleniumhq.selenium</groupId>
     <artifactId>selenium-java</artifactId>
     <version>3.11.0</version>
  </dependency>
<dependency>
    <groupId>org.seleniumhq.selenium</groupId>
    <artifactId>selenium-htmlunit-driver</artifactId>
    <version>2.52.0</version>
</dependency>    
  <dependency>
     <groupId>org.seleniumhq.selenium</groupId>
     <artifactId>selenium-server</artifactId>
     <version>3.11.0</version>
  </dependency> 

  <!-- TestNG -->
  <dependency>
     <groupId>org.testng</groupId>
     <artifactId>testng</artifactId>
     <version>6.10</version>
  </dependency> 
</dependencies>

  <build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.6.1</version>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
        </plugin>

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-surefire-plugin</artifactId>
            <version>3.0.0-M1</version>
            <configuration>
                <suiteXmlFiles>
                    <suiteXmlFile>testng.xml</suiteXmlFile>
                    <!-- <suiteXmlFile>src/main/resources/testng.xml</suiteXmlFile> -->
                </suiteXmlFiles>
            </configuration>
        </plugin>
    </plugins>  
  </build>

</project>

Answer 1

调用 quit 方法后，您将无法使用驱动程序。只需从所有方法中删除 @Test 注释并将其保留在 runTest 方法中即可解决您的问题。