gistfile1.py

from django.test import TestCase
from django.test.simple import build_test, reorder_suite, build_suite
from django.test.utils import setup_test_environment, teardown_test_environment
from django.db.models import get_app, get_apps
from django.conf import settings
import unittest

def run_tests(test_labels, verbosity=1, interactive=True, extra_tests=[]):
    """
    works exactly as per normal test, but without db creation or destruction
    tables are flushed and fixtures loaded between tests as per usual

    Run the unit tests for all the test labels in the provided list.
    Labels must be of the form:
     - app.TestClass.test_method
        Run a single specific test method
     - app.TestClass
        Run all the test methods in a given class
     - app
        Search for doctests and unittests in the named application.

    When looking for tests, the test runner will look in the models and
    tests modules for the application.

    A list of 'extra' tests may also be provided; these tests
    will be added to the test suite.

    Returns the number of tests that failed.
    """
    setup_test_environment()

    settings.DEBUG = False
    suite = unittest.TestSuite()

    if test_labels:
        for label in test_labels:
            if '.' in label:
                suite.addTest(build_test(label))
            else:
                app = get_app(label)
                suite.addTest(build_suite(app))
    else:
        for app in get_apps():
            suite.addTest(build_suite(app))

    for test in extra_tests:
        suite.addTest(test)

    suite = reorder_suite(suite, (TestCase,))

    old_name = settings.DATABASES['default']['NAME']
    old_name_alt = settings.DATABASES['alt_db']['NAME']

    from django.db import connection

    if settings.DATABASES['alt_db']['TEST_NAME'] and settings.DATABASES['alt_db']['TEST_NAME']:
        settings.DATABASES['alt_db']['NAME'] = settings.DATABASES['alt_db']['TEST_NAME']
        settings.DATABASES['default']['NAME'] = settings.DATABASES['default']['TEST_NAME']

    connection.settings_dict["DATABASE_NAME"] = settings.DATABASES['default']['NAME']

    result = unittest.TextTestRunner(verbosity=verbosity).run(suite)

    #Since we don't call destory_test_db, we need to set the db name back.
    settings.DATABASES['default']['NAME'] = old_name
    settings.DATABASES['alt_db']['NAME'] = old_name_alt
    connection.settings_dict["DATABASE_NAME"] = old_name

    teardown_test_environment()

    return len(result.failures) + len(result.errors)