The tests/integration/test_charm.py file is the companion to src/charm.py for integration testing.
This file is created automatically by charmcraft init and it is pre-populated with standard constructs used by pytest-operator, similar to the below:
#!/usr/bin/env python3
# Copyright 2023 Ubuntu
# See LICENSE file for licensing details.
import asyncio
import logging
from pathlib import Path
import pytest
import yaml
from pytest_operator.plugin import OpsTest
logger = logging.getLogger(__name__)
METADATA = yaml.safe_load(Path("./metadata.yaml").read_text())
APP_NAME = METADATA["name"]
@pytest.mark.abort_on_fail
async def test_build_and_deploy(ops_test: OpsTest):
"""Build the charm-under-test and deploy it together with related charms.
Assert on the unit status before any relations/configurations take place.
"""
# Build and deploy charm from local source folder
charm = await ops_test.build_charm(".")
resources = {
"some-container-image": METADATA["resources"]["some-container-image"]["upstream-source"]
}
# Deploy the charm and wait for active/idle status
await asyncio.gather(
ops_test.model.deploy(charm, resources=resources, application_name=APP_NAME),
ops_test.model.wait_for_idle(
apps=[APP_NAME], status="active", raise_on_blocked=True, timeout=1000
),
)