utils/dep_freshness/tests/test_discover.py
Krzysztof kuhy Rudnicki 2a2f18ca56 Add the shared dependency-freshness gate
"Are we on the newest version?" was not mechanically answerable across these
repos: constraint styles had drifted per-ecosystem and a caret range is
"newest-compatible" by definition, which gives a checker nothing to compare.
This gate makes it answerable and then enforces the answer.

Checks two things at once -- that every dependency carries an exact pin, and
that the pin equals its registry's latest STABLE release -- across pub.dev,
PyPI, npm, crates.io, the Go proxy, kuhyx/utils git tags, and the Flutter /
Node / Python toolchains.

Three deliberate design points:

* Pre-releases are rejected per-ecosystem, because every ecosystem leaks them
  differently and each leak fails GREEN. npm lets a maintainer point
  `dist-tags.latest` at an rc; crates.io's `max_version` includes them; PyPI's
  legacy `info.version` includes yanked releases. Unit-tested with fixtures,
  since an end-to-end run cannot surface a wrong "up to date".

* Offline, the gate serves an expired cache entry and PASSES with a DEGRADED
  banner (exit 3 only under --strict, which is CI). `--no-verify` is banned
  here, so a hook that hard-failed offline would leave no way to commit at all.

* The allowlist has two entry classes. `blocked_by: transitive:<pkg>@<ver>` is
  a predicate that clears itself when upstream moves and must NOT carry a
  date; everything else is discretionary and requires `expires`, capped at 90
  days. Exact pins plus latest-everywhere is provably unsatisfiable when a
  dependency internally constrains a shared transitive, and expiring the
  predicate class on a calendar would turn the gate red for a reason no commit
  could fix. An entry with nothing left to excuse is itself an error.

One hook id, one shim, one shared implementation -- always delegating, so it
cannot fork the way the 250-line cap forked into four ids, two of which were
independent reimplementations.

256 tests, 100% branch coverage on every module of the gate. Also adds the
workflow that runs them, which incidentally gives md_naming's 71 tests their
first CI run.

Not yet installed in any repo: a repo that gets the gate before its deps are
bumped is instantly and permanently red, so the gate and the upgrade land
together, per repo.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CRykabMwPgDzFHcARoqpaK
2026-08-28 13:00:35 +02:00

74 lines
2.4 KiB
Python

"""Which files the gate picks up, and which it deliberately does not."""
from __future__ import annotations
from pathlib import Path
import pytest
from dep_freshness.discover import find_manifests, is_manifest, parse_manifest
from dep_freshness.tests.conftest import write
PUBSPEC = "name: demo\ndependencies:\n http: 1.6.0\n"
@pytest.mark.parametrize("name", [
"pubspec.yaml", "pyproject.toml", "package.json", "Cargo.toml", "go.mod",
".fvmrc", ".nvmrc", ".python-version", "requirements.txt",
"requirements-dev.txt",
])
def test_manifest_names_are_recognised(name):
assert is_manifest(Path(name))
@pytest.mark.parametrize("name", ["main.dart", "README.md", "pubspec.lock",
"my-requirements.md"])
def test_other_files_are_not_manifests(name):
assert not is_manifest(Path(name))
def test_find_manifests_walks_the_tree(repo):
write(repo, "pubspec.yaml", PUBSPEC)
write(repo, "packages/core/pubspec.yaml", PUBSPEC)
write(repo, "lib/main.dart", "void main() {}\n")
found = {p.name for p in find_manifests(repo)}
assert found == {"pubspec.yaml"}
assert len(find_manifests(repo)) == 2
def test_excluded_directories_are_skipped(repo):
write(repo, "build/pubspec.yaml", PUBSPEC)
write(repo, "node_modules/x/package.json", "{}")
write(repo, ".dart_tool/pubspec.yaml", PUBSPEC)
assert find_manifests(repo) == []
def test_git_ignored_manifests_are_skipped(repo):
write(repo, ".gitignore", "generated/\n")
write(repo, "generated/pubspec.yaml", PUBSPEC)
write(repo, "pubspec.yaml", PUBSPEC)
assert [p.name for p in find_manifests(repo)] == ["pubspec.yaml"]
assert all("generated" not in str(p) for p in find_manifests(repo))
def test_outside_a_git_repo_nothing_is_treated_as_ignored(tmp_path):
write(tmp_path, "pubspec.yaml", PUBSPEC)
assert len(find_manifests(tmp_path)) == 1
def test_symlinked_manifests_are_skipped(repo):
write(repo, "real/pubspec.yaml", PUBSPEC)
(repo / "pubspec.yaml").symlink_to(repo / "real" / "pubspec.yaml")
assert [str(p) for p in find_manifests(repo)] == [
str(repo / "real" / "pubspec.yaml")
]
def test_parse_manifest_routes_by_filename(tmp_path):
path = write(tmp_path, "requirements-dev.txt", "ruff==0.16.5\n")
assert [d.name for d in parse_manifest(path)] == ["ruff"]
def test_parse_manifest_ignores_anything_else(tmp_path):
assert parse_manifest(write(tmp_path, "main.dart", "void main() {}")) == []