Cannot instantiate class error in Module 20 | Selenium Forum
M
Posted on 29/12/2016
After adding the extend report instance, I am getting below error while trying to run any classes:

Can you also share updated Module 20 code including POM file and other required files to run this?

Error -
org.testng.TestNGException:
Cannot instantiate class com.qtpselenium.core.ddf.DummyTestB

Classes -
DummyTestA.java
DummyTestB.java
DummyTestC.java

Error displayed -

org.testng.TestNGException:
Cannot instantiate class com.qtpselenium.core.ddf.DummyTestB
at org.testng.internal.ObjectFactoryImpl.newInstance(ObjectFactoryImpl.java:40)
at org.testng.internal.ClassHelper.createInstance1(ClassHelper.java:363)
at org.testng.internal.ClassHelper.createInstance(ClassHelper.java:275)
at org.testng.internal.ClassImpl.getDefaultInstance(ClassImpl.java:126)
at org.testng.internal.ClassImpl.getInstances(ClassImpl.java:191)
at org.testng.TestClass.getInstances(TestClass.java:100)
at org.testng.TestClass.initTestClassesAndInstances(TestClass.java:86)
at org.testng.TestClass.init(TestClass.java:78)
at org.testng.TestClass.<init>(TestClass.java:41)
at org.testng.TestRunner.initMethods(TestRunner.java:425)
at org.testng.TestRunner.init(TestRunner.java:252)
at org.testng.TestRunner.init(TestRunner.java:222)
at org.testng.TestRunner.<init>(TestRunner.java:171)
at org.testng.remote.support.RemoteTestNG6_9_10$1.newTestRunner(RemoteTestNG6_9_10.java:28)
at org.testng.remote.support.RemoteTestNG6_9_10$DelegatingTestRunnerFactory.newTestRunner(RemoteTestNG6_9_10.java:61)
at org.testng.SuiteRunner$ProxyTestRunnerFactory.newTestRunner(SuiteRunner.java:623)
at org.testng.SuiteRunner.init(SuiteRunner.java:189)
at org.testng.SuiteRunner.<init>(SuiteRunner.java:136)
at org.testng.TestNG.createSuiteRunner(TestNG.java:1375)
at org.testng.TestNG.createSuiteRunners(TestNG.java:1355)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1209)
at org.testng.TestNG.runSuites(TestNG.java:1133)
at org.testng.TestNG.run(TestNG.java:1104)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:126)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:137)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:58)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.testng.internal.ObjectFactoryImpl.newInstance(ObjectFactoryImpl.java:29)
... 25 more
Caused by: java.lang.NoClassDefFoundError: org/w3c/dom/ElementTraversal
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.apache.xerces.parsers.AbstractDOMParser.startDocument(Unknown Source)
at org.apache.xerces.impl.dtd.XMLDTDValidator.startDocument(Unknown Source)
at org.apache.xerces.impl.XMLDocumentScannerImpl.startEntity(Unknown Source)
at org.apache.xerces.impl.XMLVersionDetector.startDocumentParsing(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)
at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)
at javax.xml.parsers.DocumentBuilder.parse(Unknown Source)
at com.relevantcodes.extentreports.Configuration.getConfigurationMap(Configuration.java:38)
at com.relevantcodes.extentreports.Report.loadConfig(Report.java:445)
at com.relevantcodes.extentreports.Report.<init>(Report.java:566)
at com.relevantcodes.extentreports.ExtentReports.<init>(ExtentReports.java:66)
at com.relevantcodes.extentreports.ExtentReports.<init>(ExtentReports.java:195)
at com.qtpselenium.core.ddf.util.ExtentManager.getInstance(ExtentManager.java:19)
at com.qtpselenium.core.base.BaseTest.<init>(BaseTest.java:32)
at com.qtpselenium.core.ddf.DummyTestB.<init>(DummyTestB.java:9)
... 30 more
Caused by: java.lang.ClassNotFoundException: org.w3c.dom.ElementTraversal
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 60 more


My POM file -

<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>com.qtpselenium.core.ddf</groupId>
<artifactId>DataDriven_Core_Framework</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>

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

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<dependencies>
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>6.10</version>
<scope>test</scope>
</dependency>
<!-- Selenium -->
<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-java</artifactId>
<version>2.42.2</version>
</dependency>
<!-- POI -->
<dependency>
<groupId>xml-apis</groupId>
<artifactId>xml-apis</artifactId>
<version>2.0.0</version>
</dependency>
<dependency>
<groupId>com.relevantcodes</groupId>
<artifactId>extentreports</artifactId>
<version>2.40.1</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.6</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.6</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml-schemas</artifactId>
<version>3.6</version>
</dependency>
<dependency>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>1.1</version>
</dependency>

<dependency>
<groupId>org.apache.xmlbeans</groupId>
<artifactId>xmlbeans</artifactId>
<version>2.3.0</version>
</dependency>
<!-- Log4J -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.14</version>
</dependency>
<!-- JavaMail -->
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>1.4</version>
</dependency>



</dependencies>
<build>

<plugins>

<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<suiteXmlFiles>
<suiteXmlFile>src/test/resources/testng.xml</suiteXmlFile>
</suiteXmlFiles>
</configuration>
</plugin>

</plugins>
</build>
<reporting>
<plugins>
<!-- TestNG-xslt related configuration. -->
<plugin>
<groupId>org.reportyng</groupId>
<artifactId>reporty-ng</artifactId>
<version>1.2</version>
<configuration>
<!-- Output directory for the testng xslt report -->
<outputdir>/target/testng-xslt-report</outputdir>
<sorttestcaselinks>true</sorttestcaselinks>
<testdetailsfilter>FAIL,SKIP,PASS,CONF,BY_CLASS</testdetailsfilter>
<showruntimetotals>true</showruntimetotals>
</configuration>
</plugin>
</plugins>
</reporting>

<pluginRepositories>
<pluginRepository>
<id>reporty-ng</id>
<url>https://github.com/cosminaru/reporty-ng/raw/master/dist/maven</url>
</pluginRepository>
</pluginRepositories>
</project>

M
Replied on 29/12/2016

it is a very common error

http://stackoverflow.com/questions/10234201/appengine-error-java-lang-noclassdeffounderror-org-w3c-dom-elementtraversal