TestNG @Test attributes – threadPoolSize, invocationCount, timeOut

InvocationCount

public class InvocationCnt { 

    @Test(invocationCount=5) 
    public void test1() throws InterruptedException { 
        System.out.println("Thread ID: "+Thread.currentThread().getId()); 
    } 
}

OutPut:

Thread ID: 1
Thread ID: 1
Thread ID: 1
Thread ID: 1
Thread ID: 1

Above method ran 5 times, a single thread will be assigned to run the method one by one..

ThreadPoolSize

public class InvocationCnt { 

    @Test(threadPoolSize=3, invocationCount=5) 
    public void test1() throws InterruptedException { 
        System.out.println("Thread ID: "+Thread.currentThread().getId()); 
    } 
}

OutPut

[ThreadUtil] Starting executor timeOut:0ms workers:5 threadPoolSize:3
Thread ID: 11
Thread ID: 12
Thread ID: 13
Thread ID: 12
Thread ID: 11

Above method ran 5 times, but 3 threads shared the 5 times of test run…(threads 11, 12 and 13)

ThreadPoolSize with timeOut

public class InvocationCnt { 

    @Test(threadPoolSize=3, invocationCount=5, timeOut=2000) 
    public void test1() throws InterruptedException { 
        Thread.sleep(1500); 
        System.out.println("Thread ID: "+Thread.currentThread().getId()); 
    } 
}

OutPut

[ThreadUtil] Starting executor timeOut:2000ms workers:5 threadPoolSize:3
Thread ID: 11
Thread ID: 12
Thread ID: 13

Above method ran only 3 times, as the timeOut is set to 2sec (a particular thread only holds for 2sec), and testcase takes 1.5sec (by knowing we kept 1.5sec delay), and ran the tests no of times with in the 2sec, so each thread only ran once…