def read_stderr(self, num_bytes):
        raise NotImplementedError
Check that JUnit runner fails if no tests were found
dataset/ETHPy150Open pyinvoke/invoke/invoke/runners.py/Runner.read_stderr--crossover with--dataset/ETHPy150Open Blazemeter/taurus/tests/modules/test_SeleniumExecutor.py/TestSeleniumJUnitRunner.test_not_junit