org.testng.TestNGException: while trying to execute the tests

问题

I have been working on a project using Android Studio since long. Today refactored some code and it started to break,so reverted the changes. Even after reverting the changes whenever I try to debug the code, I am ending up with following an exception :

org.testng.TestNGException: org.xml.sax.SAXParseException; lineNumber: 3; columnNumber: 44; Attribute "parallel" with value "none" must have a value from the list "false methods tests classes instances ".
    at org.testng.TestNG.initializeSuitesAndJarFile(TestNG.java:325)
    at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:90)
    at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:206)
    at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:177)
    at org.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:125)
Caused by: org.xml.sax.SAXParseException; lineNumber: 3; columnNumber: 44; Attribute "parallel" with value "none" must have a value from the list "false methods tests classes instances ".
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:203)
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:134)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:396)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:327)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:284)
    at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.validateDTDattribute(XMLDTDValidator.java:1392)
    at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.addDTDDefaultAttrsAndValidate(XMLDTDValidator.java:1311)
    at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.handleStartElement(XMLDTDValidator.java:1917)
    at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.startElement(XMLDTDValidator.java:742)
    at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:380)
    at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDriver.scanRootElementHook(XMLNSDocumentScannerImpl.java:614)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:3135)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:880)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606)
    at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:118)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777)
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1213)
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:643)
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(SAXParserImpl.java:327)
    at javax.xml.parsers.SAXParser.parse(SAXParser.java:195)
    at org.testng.xml.XMLParser.parse(XMLParser.java:39)
    at org.testng.xml.SuiteXmlParser.parse(SuiteXmlParser.java:16)
    at org.testng.xml.SuiteXmlParser.parse(SuiteXmlParser.java:9)
    at org.testng.xml.Parser.parse(Parser.java:172)
    at org.testng.TestNG.initializeSuitesAndJarFile(TestNG.java:305)
    ... 4 more

trying to open the project using intelliJ I can get this gone. Any clues on this??

回答1:

Discussion and help from @juherr suggests that solution to this is :

Attribute "parallel" with value "none" must have a value from the list "false methods tests classes instances ".

TestNG 6.9.10 is now validating the xml file against the DTD The problem is that the default testng.xml template from IntelliJ is setting "parallel" on suite to "none". Here is the link to the bug for the same.

回答2:

update the testng.xml to

<suite name="Suite" parallel="false">

from

<suite name="Suite" parallel="none">

回答3:

If you have no editable testng.xml file, you can downgrade your testng dependency to 6.9.9.

回答4:

If you are using/implementing any listener in your class/project then add the annotation @Listeners on that class like below:

@Listeners(value=SuiteListener.class)

e.g.

@Listeners(value=ClassName who implemets listener.class)

e.g.

@Listeners(value=SuiteListener.class)
public class SuiteListener implements ISuiteListener
{
    lines of code / methods in class
}

Add below is a code snippet in testng.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
<suite name="Suite">
<listeners>
<listener class-name="report.SuiteListener"></listener>
</listeners>

  <test thread-count="5" name="Test">
    <classes>
      <class name="tests.Test1"/>
      <class name="tests.Test2"/>
    </classes>
  </test> <!-- Test -->

</suite> <!-- Suite -->