Parallel run using testng - selenium-webdriver

Question

I am trying to execute parallel run using testng.
i am trying to run test 4 time parallel. But it runs only one time.
testng.xml
<suite name="My suite" parallel="methods" thread-count="4">
<test name="Default test" group-by-instances="true">
<classes>
<class name="org.com.DemoClass"/>
</classes>
</test> <!-- Default test -->
</suite> <!-- Default suite -->
Demo class.
public class DemoClass {
#Test
public void method1() throws InterruptedException {
long id = Thread.currentThread().getId();
System.out.println("Before test-method. Thread id is: " + id);
}
}
Please provide your valuable suggestion.

Answer 1

You can try adding parameters to #Test annotation:
#Test(threadPoolSize = 4, invocationCount = 4)
That will invoke your test four times from 4 different threads.

Answer 2

If your need is that each of the #Test annotated methods that you write need to be executed "n" number of times (in parallel or in sequential order) without you having to explicitly add the invocationCount attribute on your own, you should be leveraging an IAnnotationTransformer using which you can on the fly change values of your #Test annotated method. You can try injecting this listener either via the suite file using the <listeners> tag or via Service Loaders. For more general information on listeners you can perhaps take a look at this blog post of mine.