在单元测试中获取错误"Provider com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl"但在主程序中没有

Question

我在C#中构建一个应用程序,它使用com.gargoylesoftware.htmlunit.WebClient来访问和检索来自网页的信息.

我的应用程序从主项目运行良好,但当我尝试构建单元测试来测试项目类时,我收到以下错误:

FactoryConfigurationError
Message "Provider com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl not found"
Source  "IKVM.OpenJDK.XML.API"  string
StackTrace  "   at javax.xml.parsers.DocumentBuilderFactory.newInstance()
at com.gargoylesoftware.htmlunit.javascript.configuration.JavaScriptConfiguration.loadConfiguration(Reader configurationReader)
at com.gargoylesoftware.htmlunit.javascript.configuration.JavaScriptConfiguration.loadConfiguration()
at com.gargoylesoftware.htmlunit.javascript.configuration.JavaScriptConfiguration..ctor(BrowserVersion )
at com.gargoylesoftware.htmlunit.javascript.configuration.JavaScriptConfiguration.getInstance(BrowserVersion browserVersion)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine..ctor(WebClient webClient)
at com.gargoylesoftware.htmlunit.WebClient.init(BrowserVersion , ProxyConfig )
at com.gargoylesoftware.htmlunit.WebClient..ctor(BrowserVersion browserVersion)
at com.gargoylesoftware.htmlunit.WebClient..ctor()
at GWT.HeadlessBrowser..ctor() in C:\\hg\\EXE\\GWT\\HeadlessBrowser.cs:line 57
at TestGWT.ProgramTest.TestLogInProcessForGWT() in C:\\hg\\TestGWT\\ProgramTest.cs:line 115"

尝试在单元测试类中创建HtmlUnit WebClient也会导致此错误.

我在主项目和包含单元测试的项目中都有项目引用htmlunit-2.7,IKVM.OpenJDK.Core和IKVM.OpenJDK.XML.API.

我是否需要额外的项目参考才能运行单元测试？可能导致此错误的原因是什么？

测试类使用Microsoft.VisualStudio.TestTools.UnitTesting;

Answer 1

最近我在测试相同的库时遇到了同样的问题.我发现包含对IKVM.OpenJDK.XML.Parse.dll的引用解决了这个问题.

Answer 2

我遇到了类似的问题.

似乎没有加载com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl类,因此工厂无法创建它.在调用工厂之前添加此行会强制加载程序集,然后工厂可以看到它,一切都按预期工作...

com.sun.org.apache.xerces.@internal.jaxp.SAXParserFactoryImpl s =   new  com.sun.org.apache.xerces.@internal.jaxp.SAXParserFactoryImpl();