utils/dep_freshness/tests/test_constraints.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

64 lines
1.9 KiB
Python

"""Range arithmetic. Wrong here means red for a reason no commit can fix."""
from __future__ import annotations
import pytest
from dep_freshness.constraints import _upper_for_caret, lower_bound, satisfies
@pytest.mark.parametrize("constraint,version,expected", [
("^3.12.2", "3.13.2", True),
("^3.12.2", "4.0.0", False),
("^3.12.2", "3.12.1", False),
("^0.2.1", "0.3.0", False), # caret's 0.x special case
("^0.2.1", "0.2.9", True),
("^0.0.3", "0.0.4", False),
("~1.2.0", "1.2.9", True),
("~1.2.0", "1.3.0", False),
("~>2.1.0", "2.1.5", True),
(">=3.8.0 <4.0.0", "3.13.2", True),
(">=3.8,<3.13", "3.14.7", False),
(">3.0.0", "3.0.0", False),
("<=2.0.0", "2.0.0", True),
("!=1.5.0", "1.5.0", False),
("==1.6.0", "1.6.0", True),
("1.6.0", "1.7.0", False),
("any", "9.9.9", True),
("*", "9.9.9", True),
("", "9.9.9", True),
])
def test_satisfies(constraint, version, expected):
assert satisfies(constraint, version) is expected
def test_an_unparseable_candidate_is_never_a_violation():
assert satisfies("^1.0.0", "not-a-version")
def test_a_constraint_with_no_version_at_all_admits_everything():
assert satisfies("workspace", "1.0.0")
def test_an_unparseable_bound_is_ignored_rather_than_failing():
assert satisfies(">=abc", "1.0.0")
def test_quoted_constraints_are_unwrapped():
assert satisfies('">=3.8.0 <4.0.0"', "3.13.2")
@pytest.mark.parametrize("text,expected", [
("1.2.3", "2.0.0"), ("0.2.1", "0.3.0"), ("0.0.3", "0.0.4"), ("2", "3.0.0"),
])
def test_caret_upper_bounds(text, expected):
assert _upper_for_caret(text) == expected
@pytest.mark.parametrize("constraint,expected", [
("^10.2.0", "10.2.0"), (">=1.2", "1.2"), ("==3.0.0", "3.0.0"),
("~1.4.0", "1.4.0"), ("2.0.0", "2.0.0"), ("any", None), ("", None),
])
def test_lower_bound(constraint, expected):
assert lower_bound(constraint) == expected