Add runtests script

Allow `python setup.py test` too.
Fix tox invocation now that `manage.py` has moved.

.gitignore

@@ -36,3 +36,4 @@ lib/
 MANIFEST
 dist/
 *.egg-info
+.tox/

runtests.py

@@ -0,0 +1,60 @@
+#!/usr/bin/env python
+from django.conf import settings, global_settings as default_settings
+from django.core.management import call_command
+from os.path import dirname, realpath
+import django
+import sys
+import os
+
+
+# Give feedback on used versions
+sys.stderr.write('Using Python version {0} from {1}\n'.format(sys.version[:5], sys.executable))
+sys.stderr.write('Using Django version {0} from {1}\n'.format(
+    django.get_version(),
+    os.path.dirname(os.path.abspath(django.__file__)))
+)
+
+
+# Detect location and available modules
+module_root = dirname(realpath(__file__))
+
+# Inline settings file
+settings.configure(
+    DEBUG = False,  # will be False anyway by DjangoTestRunner.
+    TEMPLATE_DEBUG = False,
+    DATABASES = {
+        'default': {
+            'ENGINE': 'django.db.backends.sqlite3',
+            'NAME': ':memory:'
+        }
+    },
+    TEMPLATE_LOADERS = (
+        'django.template.loaders.app_directories.Loader',
+    ),
+    TEMPLATE_CONTEXT_PROCESSORS = default_settings.TEMPLATE_CONTEXT_PROCESSORS + (
+        'django.core.context_processors.request',
+    ),
+    INSTALLED_APPS = (
+        'django.contrib.auth',
+        'django.contrib.contenttypes',
+        'django.contrib.messages',
+        'django.contrib.sites',
+        'django.contrib.admin',
+        'polymorphic',
+    ),
+    SITE_ID = 3,
+)
+
+call_command('syncdb', verbosity=1, interactive=False)
+
+
+# ---- app start
+verbosity = 2 if '-v' in sys.argv else 1
+
+from django.test.utils import get_runner
+TestRunner = get_runner(settings)  # DjangoTestSuiteRunner
+runner = TestRunner(verbosity=verbosity, interactive=True, failfast=False)
+failures = runner.run_tests(['polymorphic'])
+
+if failures:
+    sys.exit(bool(failures))

setup.py

@@ -20,6 +20,7 @@ setup(
     },
 
     install_requires=['setuptools'],
+    test_suite='runtests',
 
     classifiers=[
         'Framework :: Django',

tox.ini

@@ -7,7 +7,7 @@ envlist=
 
 [testenv]
 commands=
-    python manage.py test
+    python runtests.py
 
 # Build configurations