If you are new to selenium test case this is the first case you should write..

Selenium Test Case Example

import unittest
import time
import re
import os

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.support.ui import Select
from selenium.common.exceptions import NoSuchElementException


class Test(unittest.TestCase):
    def setUp(self):

        self.driver = webdriver.Firefox()
        self.driver.implicitly_wait(30)
        self.base_url = "http://localhost:8000"
        self.verificationErrors = []
        self.accept_next_alert = True


    def test_locations(self):
        driver = self.driver
        driver.get(self.base_url + "/admin/layout/location/")
        driver.find_element_by_link_text("Add Location").click()
        self.assertIn('Login', driver.title)


    def test_auth(self):
        driver = self.driver
        driver.get(self.base_url + "/admin/")
        # ERROR: Caught exception [Error: locator strategy either id or name must be specified explicitly.]
        driver.find_element_by_id("id_username").clear()
        driver.find_element_by_id("id_username").send_keys("adminr")

        driver.find_element_by_id("id_password").clear()
        driver.find_element_by_id("id_password").send_keys("admin")

        driver.find_element_by_css_selector("input[type=\"submit\"]").click()
        driver.find_element_by_link_text("Users").click()
        driver.find_element_by_link_text("Add user").click()
        driver.find_element_by_id("id_username").clear()
        driver.find_element_by_id("id_username").send_keys("abc")
        driver.find_element_by_id("id_password1").clear()
        driver.find_element_by_id("id_password1").send_keys("abc")
        driver.find_element_by_id("id_password2").clear()
        driver.find_element_by_id("id_password2").send_keys("abc")
        driver.find_element_by_name("_addanother").click()
        driver.find_element_by_link_text("Users").click()
        driver.implicitly_wait(40)

    def is_element_present(self, how, what):
        try:
            self.driver.find_element(by=how, value=what)
        except NoSuchElementException, e:
            return False
        return True

    def is_alert_present(self):
        try:
            self.driver.switch_to_alert()
        except NoAlertPresentException, e:
            return False
        return True

    def close_alert_and_get_its_text(self):
        try:
            alert = self.driver.switch_to_alert()
            alert_text = alert.text
            if self.accept_next_alert:
                alert.accept()
            else:
                alert.dismiss()
            return alert_text
        finally:
            self.accept_next_alert = True

    def tearDown(self):
        self.driver.quit()
        self.assertEqual([], self.verificationErrors)


if __name__ == "__main__":
    unittest.main()