Driver behavior executing parallel TestNG selenium tests with dataprovider

Question

I want to run selenium tests in TestNg in parallel that use the @dataprovider. Ideally tests are parallel by method (one test = one method) and not simple suite parallelism by

Answer 1

I had the same experience about dataProvider. In my case I used dataProvider's (parallel=true) attribute though. There are two solutions to your problem.

1. Use dataProvider and in test class and use factory annotation for your constructor. In the factory annotation's attribute, use dataProvider="Your dataProvider's name". In the testng.xml, instead of parallel=methods, use parallel=instances.

   The drawback of the above approach is that when you get the report; may be it is maven- surefire, testng Eclipse report or reportNG report, you do not see parameters passed up front. To overcome this, you can use the following approach.

2. Create a factory class and instantiate your test class in the factory method using a for loop. (Start for loop from 0.) In the test class define a constructor which receives a parameter from factory class. Define a dataProvider in this test class which can use the parameter (data-point) received in the constructor. Define a BeforeMethod or BeforeClass which can use that parameter or data point and Your test methods should have the "dataProvider" attribute pointing to the desired dataProvider. Again, in testng.xml use parallel="instances".

   Also, use try/catch block for instantiating driver object and closing the browser. This will help you in avoiding skips due to failure of setUp of tearDown method.