与geb的联动误差

Question

我试图尝试一个基本的geb脚本，不幸的是，我似乎有一些严重的问题，使这一步开始。

我使用的是IntelliJ，我已经从http://mvnrepository.com/artifact/org.gebish/geb-core/0.9.1下载了geb核心jar，以及它的4个依赖项。在运行基本脚本时，我将它们作为依赖项添加到项目结构下的IntelliJ项目中

import geb.Browser

Browser.drive {
    go "http://google.com/ncr"
}

我犯了一个很难看的错误

Caught: java.lang.LinkageError: loader constraint violation in interface itable initialization: when resolving method "com.gargoylesoftware.htmlunit.html.DomNode.getAttributes()Lorg/w3c/dom/NamedNodeMap;" the class loader (instance of org/codehaus/groovy/tools/RootLoader) of the current class, com/gargoylesoftware/htmlunit/html/DomNode, and the class loader (instance of <bootloader>) for interface org/w3c/dom/Node have different Class objects for the type org/w3c/dom/NamedNodeMap used in the signature
java.lang.LinkageError: loader constraint violation in interface itable initialization: when resolving method "com.gargoylesoftware.htmlunit.html.DomNode.getAttributes()Lorg/w3c/dom/NamedNodeMap;" the class loader (instance of org/codehaus/groovy/tools/RootLoader) of the current class, com/gargoylesoftware/htmlunit/html/DomNode, and the class loader (instance of <bootloader>) for interface org/w3c/dom/Node have different Class objects for the type org/w3c/dom/NamedNodeMap used in the signature
    at com.gargoylesoftware.htmlunit.html.HTMLParser.parseHtml(HTMLParser.java:190)
    at com.gargoylesoftware.htmlunit.DefaultPageCreator.createHtmlPage(DefaultPageCreator.java:268)
    at com.gargoylesoftware.htmlunit.DefaultPageCreator.createPage(DefaultPageCreator.java:156)
    at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseInto(WebClient.java:455)
    at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:329)
    at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:394)
    at org.openqa.selenium.htmlunit.HtmlUnitDriver.get(HtmlUnitDriver.java:474)
    at org.openqa.selenium.htmlunit.HtmlUnitDriver.get(HtmlUnitDriver.java:452)
    at org.openqa.selenium.htmlunit.HtmlUnitDriver.<init>(HtmlUnitDriver.java:181)
    at org.openqa.selenium.htmlunit.HtmlUnitDriver.<init>(HtmlUnitDriver.java:191)
    at org.openqa.selenium.htmlunit.HtmlUnitDriver.<init>(HtmlUnitDriver.java:187)
    at geb.driver.NameBasedDriverFactory.getDriver(NameBasedDriverFactory.groovy:42)
    at geb.driver.CachingDriverFactory$_getDriver_closure3.doCall(CachingDriverFactory.groovy:80)
    at geb.driver.CachingDriverFactory$_getDriver_closure3.doCall(CachingDriverFactory.groovy)
    at geb.driver.CachingDriverFactory$SimpleCache.get(CachingDriverFactory.groovy:30)
    at geb.driver.CachingDriverFactory.getDriver(CachingDriverFactory.groovy:79)
    at geb.Configuration.createDriver(Configuration.groovy:354)
    at geb.Configuration.getDriver(Configuration.groovy:343)
    at geb.Browser.getDriver(Browser.groovy:105)
    at geb.Browser.go(Browser.groovy:394)
    at geb.Browser$go$1.callCurrent(Unknown Source)
    at geb.Browser.go(Browser.groovy:386)
    at gebtest$_run_closure1.doCall(gebtest.groovy:14)
    at gebtest$_run_closure1.doCall(gebtest.groovy)
    at geb.Browser.drive(Browser.groovy:860)
    at geb.Browser$drive$0.callStatic(Unknown Source)
    at geb.Browser.drive(Browser.groovy:830)
    at geb.Browser$drive.call(Unknown Source)
    at gebtest.run(gebtest.groovy:13)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)

Answer 1

我建议使用Gradle来避免手动设置项目和解决Geb依赖关系。使用gradle最简单的方法是：

安装GVM工具：http://gvmtool.net/

通过gvm：gvm install gradle 1.12安装Gradle

创建一个build.gradle文件：

apply plugin: 'idea'
apply plugin: 'groovy'

repositories {
    mavenCentral()
}

dependencies {
    compile 'org.gebish:geb-core:0.9.3'
    compile 'org.codehaus.groovy:groovy-all:2.3.3'
    compile 'org.seleniumhq.selenium:selenium-firefox-driver:2.42.2'
}

创建一个src/main/groovy目录。

运行gradle idea。

打开生成的idea项目文件。

将您的Geb脚本放到src/main/groovy目录中并运行它。

Answer 2

我将为任何将来会遇到类似错误的人留下一个答案(不管是否涉及htmlunit )。

我刚刚遇到了同样的java.lang.LinkageError异常，使用htmlunit和geb。我的解决方案是排除htmlunit带来的htmlunit包的传递依赖关系。

如果您使用的是像我这样的groovy脚本，那么在没有传递dep的情况下使用htmlunit的说明如下：

@Grab('net.sourceforge.htmlunit:htmlunit:2.8')
@GrabExclude('xml-apis:xml-apis')

其他构建工具(如maven或gradle )具有类似的语法。