TestNG, skipped tests and "why" related information.

 As usually there are passed, failed and skipped tests. TestNG map skip tests due to failures in
precondition steps (i.e. somewhere inside all those @BeforeSuite/Group/Method routines). In such a case there is no quick-human-readable
explanation why a test was skipped. That is a pity, so what about the following:
1. Go to TestListenerAdapter#onTestSkipped(ITestResult result);
2. Check Throwable of that ITestResult;
3. If null then get skipped configurations - result.getTestContext().getSkippedConfigurations();
4. I haven't found a straight way to link skipped configuration and skipped test, but one could try to do that via TestContext/TestClass:
check whether skippedConfig.getTestClass().equals(result.getTestClass()))
5. If there is skipped config caused the test to be skipped then use result.setThrowable() to transfer throwable to ITestResult;
6. No guarantees but seems to work.