java - Selenium Webdriver 在打开的 Firefox 中失败

Question

我正在学习如何使用 Maven for Selenium Webdriver 创建一个新项目。我创建了一个 pom.xml 文件和一个包含测试的基本测试文件。

它们在这里:

pom.xml

<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>CleanSubmission</groupId>
<artifactId>CleanSubmission</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>CleanSubmissions</name>
<url>http://maven.apache.org</url>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
    <dependency>
        <groupId>org.seleniumhq.selenium</groupId>
        <artifactId>selenium-java</artifactId>
        <version>3.3.0</version>
    </dependency>
    <dependency>
        <groupId>org.testng</groupId>
        <artifactId>testng</artifactId>
        <version>6.10</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.9</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.seleniumhq.selenium</groupId>
        <artifactId>selenium-firefox-driver</artifactId>
        <version>3.3.1</version>
    </dependency>
    <dependency>
        <groupId>com.github.yev</groupId>
        <artifactId>screenshot</artifactId>
        <version>0.2</version>
    </dependency>
</dependencies>

<build>
    <pluginManagement>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.13</version>
                <dependencies>
                    <dependency>
                        <groupId>org.apache.maven.surefire</groupId>
                        <artifactId>surefire-junit47</artifactId>
                        <version>2.13</version>
                    </dependency>
                    <dependency>
                        <groupId>org.apache.maven.surefire</groupId>
                        <artifactId>surefire-testng</artifactId>
                        <version>2.13</version>
                    </dependency>
                </dependencies>
            </plugin>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>selenium-maven-plugin</artifactId>
                <version>2.3</version>
                <executions>
                    <execution>
                        <id>xvfb</id>
                        <phase>test-compile</phase>
                        <goals>
                            <goal>xvfb</goal>
                        </goals>
                        <configuration>
                            <displayPropertiesFile>2.3</displayPropertiesFile>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </pluginManagement>
</build>

和测试文件:

import org.junit.After;
import org.junit.Before;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.testng.annotations.Test;

public class ClearSubmissionTest  {
    public WebDriver driver;
    String baseUrlAdmin = "http://www.google.pl/";

    @Before
    public void setUp() throws Exception {
        WebDriver driver = new FirefoxDriver();
    }

  @Test
  public void Testno1() throws Exception  {
      driver.get(baseUrlAdmin);
      Thread.sleep(5000);
  }

    @After
    public void tearDown() throws Exception {
        driver.close();
    }
}

但是总有错误java.lang.NullPointerException: null at COS2Clean.CleanSubmissions.ClearSubmissionTest.Testno1(ClearSubmissionTest.java:21) 指向 driver.get(baseUrlAdmin); 行。我一直在寻找答案，包括更新 Selenium、选择 Firefox Webdriver 作为二进制文件，但所有方法都失败了。

当我调试时，我可以看到问题出在 org.apache.maven.plugin.MojoFailureException 而不是我的代码，因此 pom.xml 文件中的某些内容必须丢失 - 对于现在我不知道还会有什么问题......

Answer 1

使用以下代码更新您的 CleanSubmissionTest.java 文件。

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.testng.annotations.AfterTest;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;

public class ClearSubmissionTest{
    public WebDriver driver;
    String baseUrlAdmin = "http://www.google.pl/";

    @BeforeTest
    public void setUp() throws Exception {
        driver = new FirefoxDriver();
    }

  @Test
  public void Testno1() throws Exception  {
      driver.get(baseUrlAdmin);
      Thread.sleep(5000);
  }

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

如果您仍然遇到任何问题，请使用以下代码更新您的依赖项和插件并尝试

<dependencies>

    <dependency>
        <groupId>org.testng</groupId>
        <artifactId>testng</artifactId>
        <version>6.9.10</version>
    </dependency>
    <dependency>
        <groupId>org.seleniumhq.selenium</groupId>
        <artifactId>selenium-java</artifactId>
        <version>3.3.0</version>
    </dependency>
    <dependency>
        <groupId>org.seleniumhq.selenium</groupId>
        <artifactId>selenium-firefox-driver</artifactId>
        <version>3.3.1</version>
    </dependency>
    <dependency>
        <groupId>com.github.yev</groupId>
        <artifactId>screenshot</artifactId>
        <version>0.2</version>
    </dependency>
</dependencies>

<build>
    <pluginManagement>
        <plugins>
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>exec-maven-plugin</artifactId>
            <version>1.2.1</version>
            <executions>
                <execution>
                    <goals>
                        <goal>java</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.13</version>
            </plugin>
        </plugins>
    </pluginManagement>
</build>

我在我的机器上测试了它，它工作正常，请告诉我它是否适合您