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import time
import uuid
import docker as docker_client
import psycopg2
import pytest
def pytest_addoption(parser):
parser.addoption('--pg-image', action='store', default='postgres:latest',
help='Specify postgresql image name')
parser.addoption('--pg-name', action='store', default=None,
help='Specify database container name to use.')
parser.addoption('--pg-reuse', action='store_true',
help='Save database container at the end')
parser.addoption('--pg-network', action='store', default=None,
help='Specify docker network for the PostgreSQL container')
@pytest.fixture(scope='session')
def docker():
return docker_client.from_env()
def check_connection(params):
delay = 0.01
27 ↛ 37line 27 didn't jump to line 37, because the loop on line 27 didn't complete for _ in range(20):
try:
with psycopg2.connect(**params) as conn:
with conn.cursor() as cursor:
cursor.execute('SELECT version();')
break
except psycopg2.Error:
time.sleep(delay)
delay *= 2
else:
pytest.fail('Cannot start postgres server')
def create_container(docker, image, name, ports, network=None):
container = None
43 ↛ 49line 43 didn't jump to line 49, because the condition on line 43 was never false if name:
for item in docker.containers.list(all=True):
45 ↛ 46line 45 didn't jump to line 46, because the condition on line 45 was never true if name in item.name:
container = item
break
49 ↛ 67line 49 didn't jump to line 67, because the condition on line 49 was never false if not container:
try:
docker.images.pull(image)
except docker_client.errors.APIError:
pass
container_params = {'image': image, 'name': name, 'detach': True}
57 ↛ 58line 57 didn't jump to line 58, because the condition on line 57 was never true if network:
container_params['network'] = network
else:
container_params['ports'] = ports
try:
container = docker.containers.create(**container_params)
except docker_client.errors.ImageNotFound:
pytest.fail('Image `{0}` not found'.format(image))
return container
@pytest.yield_fixture(scope='session')
def pg_server(docker, request):
pg_name = request.config.getoption('--pg-name')
pg_image = request.config.getoption('--pg-image')
pg_reuse = request.config.getoption('--pg-reuse')
pg_network = request.config.getoption('--pg-network')
77 ↛ 80line 77 didn't jump to line 80, because the condition on line 77 was never false if not pg_name:
pg_name = 'db-{}'.format(str(uuid.uuid4()))
container = create_container(docker, pg_image, pg_name, {'5432/tcp': None},
pg_network)
container.start()
container.reload()
host = '127.0.0.1'
port = 5432
87 ↛ 88line 87 didn't jump to line 88, because the condition on line 87 was never true if pg_network:
net = container.attrs['NetworkSettings']['Networks'][pg_network]
host = net['IPAddress']
else:
ports = container.attrs['NetworkSettings']['Ports']
port = ports['5432/tcp'][0]['HostPort']
pg_params = {
'database': 'postgres', 'user': 'postgres', 'password': 'postgres',
'host': host, 'port': port
}
try:
check_connection(pg_params)
yield {
'network': container.attrs['NetworkSettings'],
'params': pg_params
}
finally:
106 ↛ exitline 106 didn't return from function 'pg_server', because the condition on line 106 was never false if not pg_reuse:
container.kill()
container.remove()
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