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Docker Composeを使用してDjangoのテストを実行する

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DjangoでCIを回すときにDocker起動してテスト実行したいなと思ってちょっと試してみました。

簡単なサンプル
source

redisとかの接続してテストもしたかったのでDocker Composeを使用してコマンド一発で行えるようにしました。

docker-composepip install docker-composeでインストールしています。

  • docker-composeのconfig
docker-compose.yml
web:
  build: .
  ports:
    - "8000:8000"
  links:
    - redis
  volumes:
    - app:/app
redis:
  image: redis
  ports:
    - "6379:6379"
  • webのDockerfile
FROM python:2.7
ADD app /app
WORKDIR /app
RUN pip install django redis
CMD cd /app && python manage.py test

Djangoはstart projectしたものに下記のテストファイルを追加しただけです。

tests.py
from django.test import TestCase
import redis


class Test(TestCase):

  def setUp(self):
      self.r = redis.StrictRedis(host="redis")
      self.r.flushdb()

  def test_ok(self):
      self.assertEqual(1, 1)

  def test_error(self):
      self.assertEqual(2, 1)

  def test_redis(self):
      self.assertEqual(self.r.get("name"), None)

      self.r.set("name", "name")
      self.assertEqual(self.r.get("name"), "name")

サンプルのリポジトリのところで、docker-compose run webを実行すると下記のようになりテストが実行されます。本当はmysqlとも連携したかったけどコネクトできなくて諦めました。databaseはなんでもいいというならsqlite3のほうが作成が早いのでテストはsqlite3のほうがいいですしね。

$ docker-compose run web

Creating dockerdjangotest_redis_1...
Building web...
Step 0 : FROM python:2.7
 ---> 38960da60ac6
Step 1 : ADD app /app
 ---> 8176a8eb5810
Removing intermediate container f0dcd557a477
Step 2 : WORKDIR /app
 ---> Running in 13b39ca62c46
 ---> 237ded13f022
Removing intermediate container 13b39ca62c46
Step 3 : RUN pip install django redis
 ---> Running in 286f081c5147
You are using pip version 6.0.8, however version 6.1.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
Collecting django
  Downloading Django-1.8-py2.py3-none-any.whl (6.2MB)
Collecting redis
  Downloading redis-2.10.3.tar.gz (86kB)
Installing collected packages: redis, django
  Running setup.py install for redis

Successfully installed django-1.8 redis-2.10.3
 ---> 2e59a3a2bc76
Removing intermediate container 286f081c5147
Step 4 : CMD cd /app && python manage.py test
 ---> Running in f164c5af9ec0
 ---> 49ae601130fb
Removing intermediate container f164c5af9ec0
Successfully built 49ae601130fb
Creating test database for alias 'default'...
F..
======================================================================
FAIL: test_error (app.tests.Test)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/app/app/tests.py", line 15, in test_error
    self.assertEqual(2, 1)
AssertionError: 2 != 1

----------------------------------------------------------------------
Ran 3 tests in 0.006s

FAILED (failures=1)
Destroying test database for alias 'default'...
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