Unittest2 test discovery and real dotted-path named test selection for Django

runner.py

from django.conf import settings
from django.test.simple import DjangoTestSuiteRunner, reorder_suite
from django.utils.unittest import TestCase
from django.utils.unittest.loader import defaultTestLoader


class DiscoveryDjangoTestSuiteRunner(DjangoTestSuiteRunner):
    def build_suite(self, test_labels, extra_tests=None, **kwargs):
        if test_labels:
            return super(DiscoveryDjangoTestSuiteRunner, self).build_suite(test_labels, extra_tests=extra_tests, **kwargs)
        else:
            suite = defaultTestLoader.discover(settings.TEST_DISCOVERY_ROOT)
            
            if extra_tests:
                for test in extra_tests:
                    suite.addTest(test)
            return reorder_suite(suite, (TestCase,))