how to triger testng by testng.xml, after determing by other test which testng.xml need to be run

I need to run a programe before knowing which suit of test(define in testng.xml)开发者_StackOverflow need to be trigger.

How to solve this problem? how to trigger testNG in run time?

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Have you looked at TestNG's programmatic API?

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Below code you have to put it in main method. You can run the class as regular java file.

XmlSuite suite = new XmlSuite();
suite.setName("TmpSuite");
XmlTest test = new XmlTest(suite);
test.setName("TmpTest");
List<XmlSuite> suites = new ArrayList<XmlSuite>();
suites.add(suite);
TestNG tng = new TestNG();
//MyTestListener   is custom listner if any
TestListenerAdapter listener = new MyTestListener();      
tng.addListener(listener);    
tng.setXmlSuites(suites);    //if any suits      
tng.run();  

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Hi You can add listeners ie- suitelistner , testlistner and report listener for better control over your test.