Files
host 06e4e16bbb refactor: audit batch 3 (I-3 capability verdict, I-4 policy merge)
- I-3: new models.evaluate_capability returning a CapabilityVerdict
  (ok/missing/unknown from check, known/unknown_missing from split,
  status/verb derivations); decide_routing, worker gateway check,
  worker persisted recheck, dry-run tier+gateway checks and server
  shadow endpoint all call it. Blocking rules stay at the call
  sites (gateway has no worker-default fallback, recheck blocks
  only on known, dry-run/shadow never block); all user-visible
  audit details, dry-run notes and shadow notes are byte-identical.
- I-4: new models.merge_policy_documents shared by
  load_routing_policy and dry_run_from_env; the old tiers-update
  block is kept verbatim (it was a no-op after update(): JSON
  tiers replace the whole map, file tiers absent from JSON are
  dropped -- preserved, not fixed, as that would be a behaviour
  change). dropped_tiers/partial_failures remain load-time
  records, not merge products.
- Tests: test_audit_batch3.py, 13 tests (verdict matrix + parity
  with check/split, decide/dry-run wording, merge boundaries +
  300 seeded random pairs + loader/dry-run agreement).
  Full suite: 1694 OK (skipped=11), baseline 1681 + 13, 0 failures.
2026-11-04 18:02:23 +00:00

327 lines
14 KiB
Python

"""Audit batch 3 (I-3, I-4): capability verdict unification and policy
merge unification. Pure refactor: no behaviour change.
Run: python3 -m unittest discover -s cloud/tests -p "test_audit_batch3.py" -v
"""
import copy
import json
import os
import random
import sys
import tempfile
import unittest
sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", ".."))
from cloud.models import (
check_model_capabilities,
decide_routing,
evaluate_capability,
load_routing_policy,
merge_policy_documents,
parse_routing_policy,
split_model_capability_missing,
)
from cloud.routing_dryrun import dry_run_from_env, dry_run_policy_document
REQUIRES = {"tool_calling": True, "vision": True,
"min_context_tokens": 1000}
CAPS = {
"good": {"tool_calling": True, "vision": True,
"context_tokens": 200000},
"no-tool": {"tool_calling": False, "vision": True,
"context_tokens": 200000},
"no-vision-field": {"tool_calling": True,
"context_tokens": 200000},
"small-ctx": {"tool_calling": True, "vision": True,
"context_tokens": 100},
"no-ctx": {"tool_calling": True, "vision": True},
"mixed": {"tool_calling": False, "context_tokens": 200000},
}
def _policy(mode, tier_model, requires, caps, worker_model=None):
doc = {
"version": "batch3",
"mode": mode,
"tiers": {"default": {"model": tier_model,
"requires": requires}},
"model_capabilities": caps,
}
return parse_routing_policy(doc)
class EvaluateCapabilityTestCase(unittest.TestCase):
def test_matrix_known_unknown_mixed_absent_empty(self):
cases = [
# (model, ok, missing, unknown, known, unknown_missing,
# status, verb)
("good", True, [], False, [], [], "ok", None),
("no-tool", False, ["tool_calling"], False,
["tool_calling"], [], "fail", "lacks"),
("no-vision-field", False, ["vision"], True,
[], ["vision"], "unknown", "cannot verify"),
("small-ctx", False, ["min_context_tokens"], False,
["min_context_tokens"], [], "fail", "lacks"),
("no-ctx", False, ["min_context_tokens"], True,
[], ["min_context_tokens"], "unknown", "cannot verify"),
("mixed", False, ["tool_calling", "vision"], True,
["tool_calling"], ["vision"], "unknown", "cannot verify"),
("absent-model", False,
["min_context_tokens", "tool_calling", "vision"], True,
[], ["min_context_tokens", "tool_calling", "vision"],
"unknown", "cannot verify"),
]
for (model, ok, missing, unknown, known, unknown_missing,
status, verb) in cases:
with self.subTest(model=model):
verdict = evaluate_capability(CAPS, model, REQUIRES)
self.assertEqual(verdict.ok, ok)
self.assertEqual(verdict.missing, missing)
self.assertEqual(verdict.unknown, unknown)
self.assertEqual(verdict.known_missing, known)
self.assertEqual(verdict.unknown_missing, unknown_missing)
self.assertEqual(verdict.status, status)
if verb is not None:
self.assertEqual(verdict.verb, verb)
def test_empty_requires_always_ok_even_for_absent_model(self):
verdict = evaluate_capability(CAPS, "absent-model", {})
self.assertTrue(verdict.ok)
self.assertEqual(verdict.missing, [])
self.assertFalse(verdict.unknown)
self.assertEqual(verdict.status, "ok")
def test_parity_with_old_check_and_split(self):
# The refactor contract: every verdict field equals what the
# two old functions returned for the same inputs, across a
# matrix of directories, models and requires — including the
# preserved edge where an absent model plus an uncleaned
# requires key makes the total check list the invalid key
# while the split lists only recognised keys. That edge is
# documented here as preserved parity, not as desired
# semantics; changing it would be a behaviour change.
requires_sets = [
REQUIRES,
{"tool_calling": True},
{"min_context_tokens": 500},
{},
{"tool_calling": True, "bogus_key": True},
]
models = list(CAPS) + ["absent-model", "", None]
for requires in requires_sets:
for model in models:
with self.subTest(model=model, requires=requires):
verdict = evaluate_capability(
CAPS, model, requires)
ok, missing, unknown = check_model_capabilities(
CAPS, model, requires)
known, unknown_missing = \
split_model_capability_missing(
CAPS, model, requires)
self.assertEqual(verdict.ok, ok)
self.assertEqual(verdict.missing, missing)
self.assertEqual(verdict.unknown, unknown)
self.assertEqual(verdict.known_missing, known)
self.assertEqual(
verdict.unknown_missing, unknown_missing)
class DecideRoutingWordingTestCase(unittest.TestCase):
def test_active_known_missing_falls_back_to_worker_default(self):
policy = _policy("active", "no-tool", REQUIRES, CAPS)
decision = decide_routing({}, "good", policy=policy)
self.assertEqual(decision.source, "worker_default")
self.assertTrue(decision.capability_fallback)
self.assertEqual(decision.chosen_model, "good")
self.assertIn("capability lacks: tool_calling",
decision.reason)
def test_active_both_fail_blocks_with_exact_reason_shape(self):
policy = _policy("active", "no-tool", REQUIRES, CAPS)
decision = decide_routing({}, "no-tool", policy=policy)
self.assertEqual(decision.source, "capability_blocked")
self.assertIsNone(decision.chosen_model)
self.assertIn("refusing to dispatch an incapable or"
" unverifiable model", decision.reason)
def test_shadow_unknown_and_known_notes(self):
policy = _policy("shadow", "no-vision-field", REQUIRES, CAPS)
decision = decide_routing({}, "good", policy=policy)
self.assertEqual(decision.source, "shadow")
self.assertFalse(decision.applied)
self.assertIn("capability unknown: vision", decision.reason)
policy = _policy("shadow", "no-tool", REQUIRES, CAPS)
decision = decide_routing({}, "good", policy=policy)
self.assertIn("capability lacks: tool_calling",
decision.reason)
class DryRunWordingTestCase(unittest.TestCase):
def _doc(self, mode, tier_model):
return {
"version": "batch3",
"mode": mode,
"tiers": {"default": {"model": tier_model,
"requires": REQUIRES}},
"model_capabilities": CAPS,
}
def test_tier_check_notes_and_block_flags(self):
report = dry_run_policy_document(
self._doc("active", "no-tool"))
tier = report["tiers"]["default"]
self.assertEqual(tier["capabilities"]["status"], "fail")
self.assertTrue(report["blocked"])
self.assertTrue(any(
"lacks capability: tool_calling" in w
and "would block 'default' tasks at dispatch" in w
for w in report["warnings"]))
report = dry_run_policy_document(
self._doc("shadow", "no-vision-field"))
tier = report["tiers"]["default"]
self.assertEqual(tier["capabilities"]["status"], "unknown")
self.assertFalse(report["blocked"])
self.assertTrue(any(
"cannot verify capability: vision" in w
and "shadow mode does not block dispatch" in w
for w in report["warnings"]))
def test_gateway_check_notes_and_block_flags(self):
report = dry_run_policy_document(
self._doc("active", "good"), gateway_model="no-tool")
gw = report["gateway"]["tiers"]["default"]
self.assertEqual(gw["status"], "fail")
self.assertTrue(report["blocked"])
self.assertTrue(any(
"gateway model 'no-tool' lacks capability: tool_calling"
in w
and "would block 'default' tasks at the gateway gate" in w
for w in report["warnings"]))
report = dry_run_policy_document(
self._doc("shadow", "good"), gateway_model=None)
gw = report["gateway"]["tiers"]["default"]
self.assertEqual(gw["status"], "unknown")
self.assertTrue(gw["unknown"])
self.assertTrue(any(
"gateway model is not set in CLOUD_SUB2API_DEFAULT_MODEL"
in w for w in report["warnings"]))
class MergePolicyDocumentsTestCase(unittest.TestCase):
def test_boundary_cases(self):
self.assertIsNone(merge_policy_documents(None, None))
self.assertEqual(merge_policy_documents(None, {"a": 1}),
{"a": 1})
self.assertEqual(merge_policy_documents({"a": 1}, None),
{"a": 1})
self.assertEqual(merge_policy_documents({"a": 1}, ["x"]),
{"a": 1})
self.assertEqual(merge_policy_documents(["x"], {"a": 1}),
{"a": 1})
# No tiers anywhere: plain shallow update.
self.assertEqual(
merge_policy_documents({"mode": "shadow", "version": "v1"},
{"mode": "active"}),
{"mode": "active", "version": "v1"})
def test_json_replaces_whole_tiers_map_not_per_tier(self):
# Preserved (not fixed) semantics, documented in
# merge_policy_documents: JSON tiers replace the whole map.
# File tiers absent from JSON are dropped, not preserved.
base = {"mode": "shadow",
"tiers": {"plan": "m-file-plan",
"default": "m-file-default"}}
override = {"tiers": {"plan": "m-json-plan"}}
self.assertEqual(merge_policy_documents(base, override),
{"mode": "shadow",
"tiers": {"plan": "m-json-plan"}})
def test_inputs_not_mutated(self):
base = {"mode": "shadow",
"tiers": {"plan": "m-file-plan",
"default": "m-file-default"}}
override = {"tiers": {"plan": "m-json-plan"}}
base_before, override_before = copy.deepcopy(base), \
copy.deepcopy(override)
merge_policy_documents(base, override)
self.assertEqual(base, base_before)
self.assertEqual(override, override_before)
def test_property_random_pairs_match_shallow_update(self):
rng = random.Random(20261102)
tier_values = ["m1", "m2", {"model": "m3"},
{"model": "m4", "mode": "shadow"},
{"model": "m5", "mode": "bogus"},
{"model": ""}, " ", 7, None]
top_values = ["shadow", "active", "v9", 3, None,
{"x": 1}, ["a"]]
def _rand_doc():
doc = {}
if rng.random() < 0.8:
doc["mode"] = rng.choice(["shadow", "active", "off"])
if rng.random() < 0.5:
doc["version"] = rng.choice(top_values)
if rng.random() < 0.8:
tiers = {}
for tier in rng.sample(
["plan", "goal", "default", "weird"],
rng.randint(0, 3)):
tiers[tier] = rng.choice(tier_values)
if rng.random() < 0.1:
doc["tiers"] = rng.choice(["x", 5, None])
else:
doc["tiers"] = tiers
return doc
for _ in range(300):
base = _rand_doc()
override = _rand_doc()
got = merge_policy_documents(base, override)
expected = dict(base)
expected.update(override)
self.assertEqual(got, expected)
def test_loader_and_dryrun_agree_on_same_env(self):
# Loader and dry-run now share merge_policy_documents: for
# the same file+JSON env, the parsed policy tiers and the
# dry-run report tiers (and fingerprints) must agree.
cases = [
({"mode": "shadow",
"tiers": {"plan": "m-file-plan",
"default": "m-file-default"}},
{"tiers": {"plan": "m-json-plan"}}),
({"mode": "active",
"tiers": {"default": {"model": "m1",
"requires": {"tool_calling": True}}},
"model_capabilities": {"m1": {"tool_calling": True}}},
{"mode": "shadow"}),
]
for base_doc, override_doc in cases:
with tempfile.NamedTemporaryFile(
"w", suffix=".json", delete=False) as fh:
json.dump(base_doc, fh)
path = fh.name
try:
env = {"CLOUD_ROUTING_POLICY_FILE": path,
"CLOUD_ROUTING_POLICY_JSON":
json.dumps(override_doc)}
policy = load_routing_policy(env)
report = dry_run_from_env(env)
self.assertIsNotNone(policy)
self.assertTrue(report["valid"])
for tier, model in policy.tiers.items():
self.assertEqual(
report["tiers"][tier]["model"], model)
self.assertEqual(report["content_fingerprint"],
policy.content_fingerprint())
finally:
os.unlink(path)
if __name__ == "__main__":
unittest.main()