宁静BDD -由: java.lang.ClassNotFoundException: com.google.common.base.Optional引起

Question

我是Serenity框架的新手；我克隆了这个repo：https://github.com/serenity-bdd/serenity-screenplay-train-demo

Os: Ubuntu: 17.04 
Intellij IDEA Community 2017.3 
Pom.xml: https://github.com/serenity-bdd/serenity-screenplay-train-demo/blob/master/pom.xml

<dependency>
            <groupId>net.serenity-bdd</groupId>
            <artifactId>serenity-core</artifactId>
            <version>${serenity.version}</version>
        </dependency>
        <dependency>
            <groupId>net.serenity-bdd</groupId>
            <artifactId>serenity-screenplay</artifactId>
            <version>${serenity.version}</version>
        </dependency>

我试图运行自动化测试，但是遇到了错误：

net.thucydides.core.webdriver.UnsupportedDriverException: 
Could not instantiate class org.openqa.selenium.chrome.ChromeDriver
.
.
.
Caused by: net.thucydides.core.webdriver.UnsupportedDriverException: Could 
not instantiate new WebDriver instance of type class 
org.openqa.selenium.chrome.ChromeDriver (The path to the chromedriver driver 
executable must be set by the webdriver.chrome.driver system property; for 
more information, see 
https://sites.google.com/a/chromium.org/chromedriver/downloads. The latest 
version can be downloaded from 
https://sites.google.com/a/chromium.org/chromedriver/downloads
.
.
.
.
Caused by: java.lang.IllegalStateException: The path to the chromedriver 
driver executable must be set by the webdriver.chrome.driver system 
property; for more information, see 
https://sites.google.com/a/chromium.org/chromedriver/downloads. The latest 
version can be downloaded from 
https://sites.google.com/a/chromium.org/chromedriver/downloads

我知道我缺少一些罐子或库，但不知道如何添加它们或添加什么。我猜我应该更新maven pom.xml以添加缺少的依赖项。

最新情况：

原来pom.xml指向的是旧的库版本，所以我更新了它们，现在得到了新的错误：

错误n.t.core.webdriver.WebDriverFacade --未能创建新的WEBDRIVER_DRIVER实例类org.openqa.selenium.chrome.ChromeDriver:无法实例化类org.openqa.selenium.chrome.ChromeDriver类型的新WebDriver实例(到chromedriver可执行文件的路径必须由webdriver.chrome.driver system属性设置；有关详细信息，请参阅https://sites.google.com/a/chromium.org/chromedriver/downloads。最新版本可从https://sites.google.com/a/chromium.org/chromedriver/downloads下载。

Answer 1

消息“未能创建新的WEBDRIVER_DRIVER实例”意味着Selenium无法连接到WebDriver。消息的其余部分(“到chromedriver可执行文件的路径必须由webdriver.chrome.driver系统属性设置.”)解释你需要做什么。您需要下载最新的chromedriver可执行文件，并将其放在系统路径上。宁静将为您设置webdriver.chrome.driver属性--不要，重复不要，在您的测试类或属性文件中硬编码此路径(硬编码chromedriver路径是一个常见但严重错误的反模式，因为它使您的测试非常不可移植)。