[Fixed]-Coverage test django admin custom functions

You will have to use django client and open list page for Responsible model in django admin.

https://docs.djangoproject.com/en/1.10/topics/testing/tools/#overview-and-a-quick-example

By opening admin list page your custom functions will be called and hence will covered under tests.

So basically something like below needs to be done:

from django.test import Client, TestCase

class BaseTestCase(TestCase):
    """Base TestCase with utilites to create user and login client."""

    def setUp(self):
        """Class setup."""
        self.client = Client()
        self.index_url = '/'
        self.login()

    def create_user(self):
        """Create user and returns username, password tuple."""
        username, password = 'admin', 'test'
        user = User.objects.get_or_create(
            username=username,
            email='admin@test.com',
            is_superuser=True
        )[0]
        user.set_password(password)
        user.save()
        self.user = user
        return (username, password)

    def login(self):
        """Log in client session."""
        username, password = self.create_user()
        self.client.login(username=username, password=password)


class AdminTestCase(BaseTestCase):

    def test_responsible_list(self):
        response = self.client.get('/admin/responsilbe_list/')
        # assertions....

Complete, fast and easy:

from [your-app].admin.py import Responsible  # better name it ResponsibleAdmin

class AdminTestCase(TestCase):

fixtures = ["initial_data.json"]


def test_first_name(self):
    r = Responsible.objects.get(id = 1)
    admin_function_result = Responsible.User_Name(Responsible, obj=r)
    self.assertEquals(admin_function_result, r.user.first_name)  # alternatively, pass first_name as string 

No need to use admin logins.
Test plain functions as plain functions.

The custom function needs an object derived from the queryset of the view. This should work.

from django.contrib import admin

from myapp.admin import ResponsibleAdmin  # renamed to distinguish from model class

class AdminTestCase(TestCase):

    fixtures = ["initial_data.json"]  # as in the question

    def test_first_name(self):
        r = Responsible.objects.get(id=1)
        r_admin = ResponsibleAdmin(Responsible, admin.site)
        obj = r_admin.get_object(None, r.id)
        admin_first_name = r_admin.User_Name(obj)
        self.assertEquals(admin_first_name, r.user.first_name)