'Regression test: Check whether a test run without any tests
matches a previous run.'

def test_no_tests(self):

    class TestTest(unittest.TestCase, ):
        pass
    self._try_test_run(TestTest, '<testsuite    errors="0"    failures="0"    name="unittest.suite.TestSuite"    tests="0"    time="0.000"><system-out>&lt;![CDATA[\n\n]]&gt;</system-out><system-err>&lt;![CDATA[\n\n]]&gt;</system-err></testsuite>')
