CODEWITHSUNDEEP
pythondjangotesting
rongson
rongson

Reputation: 23

Why django can be tested without running server?

I want to test the reachability of home page of a demo app.

So I do this:

from django.test import TestCase

class TestHomePageView(TestCase):
    def test_reachable_home(self):
        response = self.client.get('/home/')
        self.assertEqual(response.status_code, 200)

and the views.py

from django.shortcuts import render

def home_view(request):
    return render(request, 'home.html', {})

home.html is a simple one:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Home</title>
</head>
<body>
    Hi, circleci and django
</body>
</html>

and urls.py:

from django.contrib import admin
from django.urls import path

from demo_app.views import home_view

urlpatterns = [
    path('admin/', admin.site.urls),
    path('home/', home_view)
]

It's a really simple demo app.

What I am curious is "Why I can test the status code without running django server?" Just simply $ python manage.py test without $ python manage.py runserver

and get the test result:

$ python manage.py test
Creating test database for alias 'default'...
System check identified no issues (0 silenced).
.
----------------------------------------------------------------------
Ran 1 test in 0.011s

OK
Destroying test database for alias 'default'...

Any idea or suggestion is welcome, thanks.

Upvotes: 0

Views: 1545

Answers (1)

smaftoul
smaftoul

Reputation: 2721

Testing allows you to modify your code with more confidence: tests are ok, you modify your code, if tests are still ok, then, you didn't break anything.

Thus, you want to be able to execute your tests often and fast, so you can modify your code more easily, with more confidence.

Framworks and languages provide means of testing that are the lighter possible, so tests are more flexible and runs faster.

Also, you want to test your code, not others, if your tests runs through http, you also test your http server.

Moreover, HTTP, is a transport protocol, we don't need a transport protocol to provide arguments to functions, to check it behaves as intended.

To sum up, you want to be able to run your test often, the fastest it is, the more you are able to run your tests, plus, you want to test only your code, not the code of your webserver.

Upvotes: 1

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