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backend/__init__.py eagerly imported the whole framework (manifest, egress,
git-gate, env, workspace, agent-provider), so importing ANY backend.* submodule
paid ~32 modules just to run the package init. Split it:
- backend/base.py — the abstract contract (BottleSpec, BottlePlan,
BottleCleanupPlan, ExecResult, ActiveAgent, Bottle,
BottleImages, BottleBackend). Carries the framework
imports; loaded only when a caller needs the contract.
- backend/selection.py — backend registry / selection / enumeration
(get_bottle_backend, _get_backends, _auto_select_backend,
has_backend, known_backend_names, enumerate_active_agents).
Concrete backends still imported lazily inside.
- backend/__init__.py — thin: a __getattr__ that resolves the public names
from those submodules on first access (+ a TYPE_CHECKING
block for checkers). Existing `from bot_bottle.backend
import X` and patch.object call-sites keep working.
`import bot_bottle.backend` drops from 32 -> 2 bot_bottle modules. Repointed the
backend-selection test's patch targets to the `selection` module (the functions
reference each other there now; the FirecrackerBottleBackend class-method
patches are unchanged — same class object).
Note: backend.docker.util is still heavy because backend/docker/__init__ eagerly
imports DockerBottleBackend — slimming the three sub-package inits is the
follow-up that makes the leaves cheap.
Full unit suite green (2243).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Tests
Plain-Python test suite using stdlib unittest. No external
dependencies. Unit tests run anywhere Python 3 is present; integration
tests need Docker and skip cleanly otherwise.
Layout
tests/
fixtures.py # JSON manifest builders (shared)
_docker.py # docker-availability skip helper (shared)
unit/
test_egress.py
test_egress_addon_core.py
test_manifest_egress.py
test_dlp_detectors.py
test_manifest_runtime.py
... # many others; see unit/ directory
integration/
test_gateway_image.py
test_dry_run_plan.py
test_orphan_cleanup.py
...
canaries/ # opt-in; see below (currently empty)
Classification falls out of the directory — no hand-maintained list to keep in sync.
Running
python -m unittest discover -t . -s tests/unit -v # unit only
python -m unittest discover -t . -s tests/integration -v # integration only
python -m unittest discover -t . -s tests -v # both (recursive)
python -m unittest tests.unit.test_manifest_egress # one file
Discovery is invoked with -t . (top-level dir = repo root) so the
bot_bottle package on sys.path resolves correctly.
What the integration tests cover
test_dry_run_plan.py—cli.py start --dry-run --format=jsonemits a structured plan that contains the resolved egress allowlist and the bottle's runtime, and creates zero Docker resources.test_orphan_cleanup.py—network_removeis idempotent against missing resources, so the EXIT trap can call it unconditionally.test_gateway_image.py— builds Dockerfile.gateway and probes that gitleaks / mitmdump / supervise are all reachable inside the gateway image.
Canaries
tests/canaries/ holds upstream-regression checks gated on
BOT_BOTTLE_RUN_CANARIES=1 and not part of the per-push suite.
They're invoked by the scheduled canaries workflow. Currently
no canaries are defined.
BOT_BOTTLE_RUN_CANARIES=1 python -m unittest discover -t . -s tests/canaries -v
What's NOT covered
bot_bottle/ssh.pyend-to-end (would need a fake SSH host inside the container).- A live SSH-through-git-gate tunnel against a real Tailscale-style IP.
- DLP false-positive measurements.
- TLS handling / cert pinning behavior.
Adding a test
- Pick the directory:
tests/unit/for a pure unit test,tests/integration/for one that needs Docker. - Filename:
test_<topic>.py. - Boilerplate:
import unittest from bot_bottle.<module> import <symbol> class TestThing(unittest.TestCase): def test_x(self): ... if __name__ == "__main__": unittest.main() - For Docker-dependent tests, decorate the class with
@skip_unless_docker()fromtests._docker.