# test*.py
import unittest
from mymodule import Rounder

class TestRounder(unittest.TestCase):
    # called before each test method (setup)
    # can be used to create fixtures
    def setUp(self):
        self.rounder = Rounder()

    def tearDown(self):  # called after each test method (cleanup)
        self.rounder.close()

    def test_round_down(self):  # all tests method names start with 'test_'
        self.assertEqual(self.rounder.round(3.1), 3)


if __name__ == '__main__':  # or 'python -m unittest discover'
    unittest.main()

dukebody@pepino:~/develop/testing > python test.py
F
======================================================================
FAIL: test_round_down (__main__.TestRounder)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "test.py", line 14, in test_round_down
    self.assertEqual(self.rounder.round(3.1), 3)
AssertionError: None != 3

----------------------------------------------------------------------
Ran 1 test in 0.001s

FAILED (failures=1)

dukebody@pepino:~/develop/testing > python test.py 
.
----------------------------------------------------------------------
Ran 1 test in 0.001s

# rollback transaction on teardown
# isolated test db
from django.test import TestCase  # transaction for each test method
from myapp.models import Animal

class AnimalTestCase(TestCase):
    def setUp(self):
        Animal.objects.create(name="lion", sound="roar")
        Animal.objects.create(name="cat", sound="meow")

    def test_animals_can_speak(self):
        """Animals that can speak are correctly identified"""
        lion = Animal.objects.get(name="lion")
        cat = Animal.objects.get(name="cat")
        self.assertEqual(lion.speak(), 'The lion says "roar"')
        self.assertEqual(cat.speak(), 'The cat says "meow"')

from django.test import TestCase

# use built-in test client
class MyTestCase(TestCase):
    def test_create_book(self):
        """
        Posting creates a new book.
        """
        data = {'title': 'The catcher in the rye'}
        response = self.client.post('/books/', data)  # urlresolver

        books = Book.objects.all()
        self.assertEquals(len(books), 1)
        self.assertEqual(books[0].title, data['title']

from django.test import TestCase, override_settings

class LoginTestCase(TestCase):

    @override_settings(LOGIN_URL='/other/login/')
    def test_login(self):
        response = self.client.get('/sekrit/')
        self.assertRedirects(response, '/other/login/?next=/sekrit/')

from selenium import webdriver
from selenium.webdriver.common.keys import Keys
import unittest

class NewVisitorTest(unittest.TestCase):

    def setUp(self):
        self.browser = webdriver.Firefox()
        self.browser.implicitly_wait(3)

    def tearDown(self):
        self.browser.quit()

    def test_can_start_a_list_and_retrieve_it_later(self):
        # Edith has heard about a cool new online to-do app. She goes
        # to check out its homepage
        self.browser.get('http://localhost:8000')

        # She notices the page title and header mention to-do lists
        self.assertIn('To-Do', self.browser.title)
        header_text = self.browser.find_element_by_tag_name('h1').text
        self.assertIn('To-Do', header_text)

# tests.py
class FooTests(unittest.TestCase):

    def test_with_factory_boy(self):
        # We need a 200€, paid order,
        # shipping to australia, for a VIP customer
        order = OrderFactory(
            amount=200,
            status='PAID',
            customer__is_vip=True,
            address__country='AU',
        )
        # Run the tests here


# factories.py
import factory
from . import models

class UserFactory(factory.Factory):
    class Meta:
        model = models.User

    first_name = 'John'
    last_name = 'Doe'
    admin = False

from freezegun import freeze_time

@freeze_time("2012-01-14")
def test():
    assert datetime.datetime.now() == datetime.datetime(2012, 01, 14)

dukebody@pepino:~/develop/sklearn-pandas > cat tox.ini 
[tox]
envlist = py27, py34

[testenv]
deps =
     pip==7.0.1
     pytest==2.7.1
     setuptools==16.0
     wheel==0.24.0
     flake8==2.4.1
     py27: mock==1.3.0

commands =
         flake8 tests
         py.test