Error: Could not find or load main class testng.xml

[Charles Radley]

For the first time I am trying to run a testng test at the command line.

I am trying two different projects with two different testng.xml  files, and I am getting the same error for each.

Here is the first XML file which was auto generated by eclipse:

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">

<suite name="Suite">

  <test name="Test">

  </test> <!-- Test -->

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

In the first project, the classes do not contain any testng annotations.

When I try to run it at command line from the project folder, I get this error:

C:\Users\charles\workspace\111 Learning Selenium Project - Demo>java -cp testng.jar testng.xml

Error: Could not find or load main class testng.xml

--------------------

And then here is the second project testng.xml file:

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">

<suite name="Suite">

    <test name="TpPortalLogin">

    <parameter name="browser" value="chrome"/>

    <parameter name="url" value="http://xyz.local/"/>

    <parameter name="username" value="somebody"/>

    <parameter name="password" value="something"/>

        <classes>

            <class name="com.parameterization.TestParameters" />

        </classes>

  </test> <!-- Test -->

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

the test suite contains four classes, all of which has @Test annotation, one of them also attempts to use @Parameters annotation.

Here is the transcript:

C:\Users\charles\Documents\test-automation\selenium\TP Portal\target\classes\tP_Portal>java -cp org.testng.TestNG testng.xml

Error: Could not find or load main class testng.xml

---

Any thoughts on why testng is not loading the testng.xml file in each case /

Thanks,

CFR.

[⇜Krishnan Mahadevan⇝]

Charles,

The correct syntax would be : java -cp <includeLocationsWhereYourJarsExist> org.testng.TestNG testng.xml

Thanks & Regards
Krishnan Mahadevan

"All the desirable things in life are either illegal, expensive, fattening or in love with someone else!"
My Scribblings @ http://wakened-cognition.blogspot.com/

My Technical Scribbings @ http://rationaleemotions.wordpress.com/

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[Aditi Garg]

This is not working for me. please help

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[Krishnan Mahadevan]

Aditi

Please share details on what you tried and what are you seeing as a problem.

Thanks & Regards

Krishnan Mahadevan

"All the desirable things in life are either illegal, expensive, fattening or in love with someone else!"

http://rationaleemotions.com/

[Aditi Garg]

In IntelliJ I have testNG project, which I can successfully run via right-click on TestNG.xml and it will run all test classes mentioned in the XML file.

The thing I am now trying is --> to run the same testNG.xml File via command prompt

So when I am running the below commands I am getting an error :

E:\intellijws\automationandroid>java -cp E:\intellijws\automationandroid\lib\*; org.testng.TestNG testNG.xml

Error: A JNI error has occurred, please check your installation and try again

Exception in thread "main" java.lang.NoClassDefFoundError: com/beust/jcommander/ParameterException

        at java.lang.Class.getDeclaredMethods0(Native Method)

        at java.lang.Class.privateGetDeclaredMethods(Unknown Source)

        at java.lang.Class.privateGetMethodRecursive(Unknown Source)

        at java.lang.Class.getMethod0(Unknown Source)

        at java.lang.Class.getMethod(Unknown Source)

        at sun.launcher.LauncherHelper.validateMainClass(Unknown Source)

        at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)

Caused by: java.lang.ClassNotFoundException: com.beust.jcommander.ParameterException

        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)

        ... 7 more

Also, noted that in my project there is no bin folder and lib folder. My project jars are all included in external libraries folder

Please let me know if you need any more details.

Thanks

Aditi

[Aditi Garg]

I have created a lib folder, placed the testng jars into it and then run the command  -

E:\intellijws\automationandroid>java -cp E:\intellijws\automationandroid\lib\*; org.testng.TestNG testNG.xml

error is 

Error: A JNI error has occurred, please check your installation and try again

Exception in thread "main" java.lang.NoClassDefFoundError: com/beust/jcommander/ParameterException

        at java.lang.Class.getDeclaredMethods0(Native Method)

        at java.lang.Class.privateGetDeclaredMethods(Unknown Source)

        at java.lang.Class.privateGetMethodRecursive(Unknown Source)

        at java.lang.Class.getMethod0(Unknown Source)

        at java.lang.Class.getMethod(Unknown Source)

        at sun.launcher.LauncherHelper.validateMainClass(Unknown Source)

        at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)

Caused by: java.lang.ClassNotFoundException: com.beust.jcommander.ParameterException

        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)

        ... 7 more

[⇜Krishnan Mahadevan⇝]

You are missing http://jcommander.org/#_download in your classpath.

You should consider using a build tool such as Maven/Gradle to setup your CLASSPATH, instead of you trying to download everything on your own and manage your CLASSPATH (which is prone to errors such as this)

Thanks & Regards
Krishnan Mahadevan

"All the desirable things in life are either illegal, expensive, fattening or in love with someone else!"
My Scribblings @ http://wakened-cognition.blogspot.com/

My Technical Scribblings @ https://rationaleemotions.com/

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[Aditi Garg]

Hi Krishnan,

Thanks for your help, I have tried to resolve as you told :

Create lib and insert all jars to it. jcommander and testng both jars were there.

Run:  mvn dependency:build-classpath

Build success

Run java -cp E:\intellijws\automationandroid\lib\*; org.testng.TestNG testNG.xml

[TestNG] [ERROR]

Cannot find class in classpath: com.testcases.LoginTest

Exception in thread "main" java.lang.NullPointerException

        at org.testng.TestNG.getStatus(TestNG.java:211)

        at org.testng.TestNG.main(TestNG.java:1324)

though it is still running fine via intelli j but not via command line

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[Mallichetty Hemanth Kumar]

in testNG.xml you may entered wrong class path, check once 

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[Aditi Garg]

Attached is my xml file but this xml is working fine via intellij test execution, the process is working absolutely fine. 

<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd" >

<suite name="REGRESSION_TEST_SET" parallel="tests" thread-count="3" preserve-order="true">

    <listeners>

        <listener class-name="main.java.com.Report.EmailableReport"/>

     </listeners> 

    <test name="AUTOMATION">

        <classes>

            <class name="testcases.LoginTest"/>

          

        </classes>

    </test>

</suite>

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[Mallichetty Hemanth Kumar]

keep the testNG file name as mentioned below. 

use "mvn test" in cmd

<build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.22.2</version>
                <configuration>
                    <suiteXmlFiles>
                        <!-- TestNG suite XML files -->
                        <suiteXmlFile>src/test/java/testng.xml</suiteXmlFile>
                    </suiteXmlFiles>
                </configuration>
            </plugin>
        </plugins>
 </build>

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[Aditi Garg]

all maven commands are already successfully running, my only concern is to run TestNG commands i.e to run testng.xml

For testng.xml - if I am trying to run testng.xml then I am getting the errors.

Thanks

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[Mallichetty Hemanth Kumar]

To execute testNg.xml through command line, first u have to keep the path of testNg.xml in pom.xml file, so that u can run 

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[Aditi Garg]

Yes, you're right.

I understand this and testng. xml path is already in pom. 

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[Mallichetty Hemanth Kumar]

Can you share the command line screenshot

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[Aditi Garg]

On Friday, July 17, 2020 at 12:20:17 PM UTC+1, Mallichetty Hemanth Kumar wrote:

Can you share the command line screenshot

On Fri 17 Jul, 2020, 4:48 PM Aditi Garg, <gargad...@gmail.com> wrote:

Yes, you're right.

I understand this and testng. xml path is already in pom. 

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[Aditi Garg]

Via command line: if I run mvn test - the test executes successfully, but it will generate maven report not the testNG report.

Via intellij , testng.xml running and it generated the customized testNG.xml report. so this is I am trying to run via command line.

Hope that you understand my issue.

Thanks.

[⇜Krishnan Mahadevan⇝]

Aditi,

We seem to be going around in circles.

So lets take a step back.

Why do you need to be running tests via a "java -cp" command instead of leveraging the build tool (Gradle/Maven) to run your tests ?

Can you please clarify that ?

Thanks & Regards
Krishnan Mahadevan

"All the desirable things in life are either illegal, expensive, fattening or in love with someone else!"
My Scribblings @ http://wakened-cognition.blogspot.com/

My Technical Scribblings @ https://rationaleemotions.com/

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[Aditi Garg]

I simply want to execute my testng. xml file via command line to run the test class set mention in xml file so for that i am executing the command mentioned above java -cp..... 

Please correct me if I am wrong. 

(Earlier I was running mvn commands to execute test set but its not showing me the customized reports which i have implemented and added listners in testng. xml for customization)

Via google when i explored how to run testng. xml via command line it showed in all blogs to run java -cp <jar location>;<project location> org..... 

 

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[⇜Krishnan Mahadevan⇝]

Aditi,

Few things.

If you are having a build tool that is managing your CLASSPATH (maven in your case), then you should be using "mvn clean test" to run your tests.

You will use "java -cp" mostly when you want to work with jars directly and source code is not available as class files.

Listeners would get invoked only if they are either added to your suite xml file or if you have added them as mandatory listeners via a service loader (https://rationaleemotions.com/testng_listeners/)

Thanks & Regards
Krishnan Mahadevan

"All the desirable things in life are either illegal, expensive, fattening or in love with someone else!"
My Scribblings @ http://wakened-cognition.blogspot.com/

My Technical Scribblings @ https://rationaleemotions.com/

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[Aditi Garg]

Hmm, understood your points. 

Hopefully this helps me to clear and exceute this. 

Really Appreciate your help and time. 

Thanks

Aditi

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[Ashees Sahoo]

Are u using Maven project?

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