How to test login functionality using LiveServerTestCase and Selenium in Django

Question

I am writing test cases for a project, and want to test my login functionality. I am using LiveServerTestCase class, selenium and following this documentation in Django website [link] (https://docs.djangoproject.com/en/1.8/topics/testing/tools/). If you see the code below :

from django.test import LiveServerTestCase
from selenium.webdriver.firefox.webdriver import WebDriver

class MySeleniumTests(LiveServerTestCase):
    fixtures = ['user-data.json']

    @classmethod
    def setUpClass(cls):
        super(MySeleniumTests, cls).setUpClass()
        cls.selenium = WebDriver()

    @classmethod
    def tearDownClass(cls):
        cls.selenium.quit()
        super(MySeleniumTests, cls).tearDownClass()

    def test_login(self):
        self.selenium.get('%s%s' % (self.live_server_url, '/login/'))
        username_input = self.selenium.find_element_by_name("username")
        username_input.send_keys('rakesh')
        password_input = self.selenium.find_element_by_name("password")
        password_input.send_keys('ranjan')
        self.selenium.find_element_by_xpath('//input[@value="Log in"]').click()

My username is rakesh and password is ranjan, and I am wondering why the following code fails here? I am sending my parameters correctly, but still it is not accepting.

Since on every test case a new database is created, is there a way to create new user and password in the above code as well? I am particularly new to writing test cases and will appreciate any help.

Error: loaddata.py:225: UserWarning: No fixture named 'user-data' found.
  warnings.warn("No fixture named '%s' found." % fixture_name)

I am also not able to understand what do you mean by fixtures = ['user-data.json']

François Constant · Accepted Answer · 2015-10-17 22:09:53Z

1

I strongly advise you to use a factory instead of a JSON fixture. It's a lot more readable and easy to maintain.

In the example you've sent, I wonder if the password is correctly encrypted or not.

Example:

factories.py:

from django.contrib.auth.hashers import make_password
from factory import DjangoModelFactory, Sequence


class UserFactory(DjangoModelFactory):
    class Meta:
        model = User

    # this is just an example; you need the required fields on your actual User Model
    email = Sequence(lambda n: 'john-doe-{0}@a.com'.format(n))
    username = Sequence(lambda n: 'john_doe_{0}'.format(n))
    password = make_password("password")

in your test:

def test_login(self):
    rakesh = UserFactory.create(
        username="rakesh", 
        password=make_password("ranjan")
    )
    self.selenium.get('%s%s' % (self.live_server_url, '/login/'))
    ...

Obviously, if the following still won't pass:

    body = self.selenium.find_element_by_tag_name('body')
    self.assertIn(u'Welcome rakesh, you have successfully logged in.', body.text)

make sure to print body to find out what the error is.

answered Oct 17, 2015 at 22:09

François Constant

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7 Comments

python Over a year ago

Any idea where I am going wrong in this code: just check login_user function link

François Constant Over a year ago

What? What's the error? That sample is not taking my answer into account !

python Over a year ago

I am just wondering why the login_user function not working in my code. Both username and password are correct. I should be redirected to a different page but that's not happening.

François Constant Over a year ago

print body please :)

python Over a year ago

Hey I am trying to implement your method and I am getting import error from factory import DjangoModelFactory, Sequence

|

pista329 · Accepted Answer · 2015-10-17 21:38:33Z

1

Fixture is initial dataset for specific model. Your test case will create test database, tables, and inserts data according to fixture file.

You can create fixture by hand or export using dumpdata management command. Since passwords are hashed, its easier to create user within your app, then export table data as fixture:

$ python manage.py dumpdata auth.User --indent 4 > user-data.json

user-data.json will contain something like this:

# app_name/fixtures/user-data.json
[
{
  "fields": {
    "username": "rakesh",
    "password": "pbkdf2_sha256$15000$sDvLgitB2ieq$tGnZ4Vw+BVOnluucn0GyLzi1tV1dZEg=",
  },
  "model": "auth.user",
  "pk": 1
}
]

To test your login process with selenium check, if body.text after submitting login form contains specific text:

def test_login(self):
    self.selenium.get('%s%s' % (self.live_server_url, '/login/'))
    username_input = self.selenium.find_element_by_name("username")
    username_input.send_keys('rakesh')
    password_input = self.selenium.find_element_by_name("password")
    password_input.send_keys('ranjan')
    #self.selenium.find_element_by_xpath('//input[@value="Log in"]').click()
    # or submit with return key
    from selenium.webdriver.common.keys import Keys
    password_input.send_keys(Keys.RETURN)

    body = self.selenium.find_element_by_tag_name('body')
    self.assertIn(u'Welcome rakesh, you have successfully logged in.', body.text)

edited Oct 17, 2015 at 21:38

answered Oct 17, 2015 at 19:56

pista329

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5 Comments

python Over a year ago

How do you test whether the user data is valid or not ? If it is not validated raise an error

pista329 Over a year ago

Fixture contains initial data for your test case. But your question is about test case, let me update my answer.

python Over a year ago

I have added fixtures now, my username and password is correct but still it is not showing anything. You can view my code here <gist.github.com/rakeshsukla53/4f3abceac47c5ca7ca41>, any pointers where I might be wrong

python Over a year ago

How can I check response I will get from password_field.send_keys(Keys.RETURN). I mean when you hit enter, either you will redirected or status code will be 403 right? Unfortunately response of password_field.send_keys(Keys.RETURN) is None :/

pista329 Over a year ago

I am not sure if you can get response status code form selenium's webdriver. Selenium acts as headless web browser. send_keys(Keys.RETURN) will submit form. body = self.selenium.find_element_by_tag_name('body') right after submiting will get you a new body content. Log body.text to see if it works.

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