Setting DataProvider thread count from command line

[Greg Hicks]

Hi All

I have been working  on using the parallel threads in testng and have been able to get the test to work from a suite xml file. I have attached the files for reference.

Its just a thought at the moment, could I use something like this to do the same from maven surefire?

mvn -Dtest=parallelDataProvider#testParallel -Dparallel="methods" -Ddata-provider-thread-count="6" test

If feedback indicates consensus to implement, then I will work with the group devs towards the solution.

regards


Greg Hicks

Senior Software Engineer and QA Test Engineer

Melbourne Australia

[Krishnan Mahadevan]

Greg,

 

I didn’t quite get as to what you are trying to achieve.

Being able to control the data provider thread count is a pretty straight forward thing that you can do with TestNG.

 

For doing it you would be leveraging org.testng.IAlterSuiteListener

 

Here’s a sample that shows how to do this:

 

A sample listener could look like below:

 

import org.testng.IAlterSuiteListener;

import org.testng.xml.XmlSuite;

 

import java.util.List;

 

public class SuiteAlterer implements IAlterSuiteListener {

 

    @Override

    public void alter(List<XmlSuite> suites) {

        int count = Integer.parseInt(System.getProperty("threadcount", "3"));

        XmlSuite suite = suites.get(0);

        suite.setDataProviderThreadCount(count);

    }

}

 

Here’s a test class:

import org.testng.TestNG;

import org.testng.annotations.DataProvider;

import org.testng.annotations.Test;

 

public class TestClassSample {

    public static void main(String[] args) {

        System.setProperty("threadcount", "20");

        TestNG testng = new TestNG();

        testng.setTestClasses(new Class<?>[]{TestClassSample.class});

        testng.addListener(new SuiteAlterer());

        testng.run();

    }

 

    @Test(dataProvider = "dp")

    public void testMethod(int i) {

        System.err.println("Running with the value (" + i + ") on thread [" + Thread.currentThread().getId() + "]");

    }

 

    @DataProvider(name = "dp", parallel = true)

    public Object[][] getData() {

        int size = 20;

        Object[][] objects = new Object[size][1];

        for (int i = 0; i < size; i++) {

            objects[i] = new Object[]{i};

        }

        return objects;

    }

}

 

Here’s the output:

 

Running with the value (18) on thread [29]

Running with the value (0) on thread [11]

Running with the value (2) on thread [13]

Running with the value (16) on thread [27]

Running with the value (10) on thread [21]

Running with the value (15) on thread [26]

Running with the value (3) on thread [14]

Running with the value (7) on thread [18]

Running with the value (19) on thread [30]

Running with the value (8) on thread [19]

Running with the value (9) on thread [20]

Running with the value (17) on thread [28]

Running with the value (5) on thread [16]

Running with the value (11) on thread [22]

Running with the value (14) on thread [25]

Running with the value (4) on thread [15]

Running with the value (6) on thread [17]

Running with the value (12) on thread [23]

Running with the value (1) on thread [12]

Running with the value (13) on thread [24]

 

===============================================

Command line suite

Total tests run: 20, Failures: 0, Skips: 0

===============================================

 

 

Process finished with exit code 0

 

 

 

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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[Greg Hicks]

Hi Krishnan

You're on the right track, thanks for the info.

If we need to pass the value in via the command line as I had shown, it looks like pom properties can be helpful to this work.

Otherwise the IAlterSuiteListener seems to be the right solution for this to be run via a CI server.

Cheers

[Greg Hicks]

PS could we update the data provider parallel = true value?

[⇜Krishnan Mahadevan⇝]

​For that you should be implementing org.testng.IAnnotationTransformer2 and wiring this listener in.​

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/

To unsubscribe from this group and stop receiving emails from it, send an email to testng-users+unsubscribe@googlegroups.com.

[Greg Hicks]

Krishnan

Thanks for the pointer.. I will give it a try and let you know how I go with it

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regards

Greg

[kool79]

You use incorrect property name. Valid name does not contain hyphens:
-Ddataproviderthreadcount="6"



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