import time
import redis
import pytest
from dockerctx import new_container
# First make a pytest fixture
@pytest.fixture(scope='function')
def f_redis():
    # This is the new thing! It's pretty clear.  The `ready_test` provides
    # a way to customize what "ready" means for each container. Here,
    # we simply pause for a bit.
    with new_container(
            image_name='redis:latest',
            ports={'6379/tcp': 56379},
            ready_test=lambda: time.sleep(0.5) or True) as container:
        yield container
# Here is the test.  Since the fixture is at the "function" level, a fully
# new Redis container will be created for each test that uses this fixture.
# After the test completes, the container will be removed.
def test_redis_a(f_redis):
    # The container object comes from the `docker` python package. Here we
    # access only the "name" attribute, but there are many others.
    print('Container %s' % f_redis.name)
    r = redis.StrictRedis(host='localhost', port=56379, db=0)
    r.set('foo', 'bar')
    assert r.get('foo') == b'bar'