test_image_custom_build.py

import pytest
import subprocess
import testinfra

@pytest.fixture(scope='session')
def host():
    subprocess.check_call(
        ['docker', 'build', '-t', 'radicale-under-test',
         '--build-arg', 'VERSION=3.0.0',
         '--build-arg', 'BUILD_UID=6666',
         '--build-arg', 'BUILD_GID=7777',
         '.'
         ])
    docker_id = subprocess.check_output(['docker', 'run', '-d', 'radicale-under-test']).decode().strip()

    yield testinfra.get_host("docker://" + docker_id)

    # teardown
    subprocess.check_call(['docker', 'rm', '-f', docker_id])

def test_process(host):
    process = host.process.get(comm='radicale')
    assert process.pid == 1
    assert process.user == 'radicale'
    assert process.group == 'radicale'

def test_port(host):
    assert host.socket('tcp://0.0.0.0:5232').is_listening

def test_version(host):
    assert host.check_output('radicale --version') == '3.0.0'

def test_user(host):
    user = 'radicale'
    assert host.user(user).uid == 6666
    assert host.user(user).gid == 7777
    assert host.user(user).shell == '/bin/false'
    assert 'radicale L ' in host.check_output('passwd --status radicale')

def test_data_folder_writable(host):
    folder = '/data'
    assert host.file(folder).user == 'radicale'
    assert host.file(folder).group == 'radicale'
    assert host.file(folder).mode == 0o770