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import sys
import time
import types
import unittest
from enum import IntEnum
from pathlib import Path
from pydantic import ValidationError
BACKEND_ROOT = Path(__file__).resolve().parents[1]
sys.path.insert(0, str(BACKEND_ROOT))
def _install_import_stubs() -> None:
auth_guard = types.ModuleType("api.auth_guard")
class AuthRole(IntEnum):
MACHINE = 1
auth_guard.AuthRole = AuthRole
auth_guard.require_role = lambda _role: (lambda: None)
sys.modules["api.auth_guard"] = auth_guard
health_module = types.ModuleType("api.health_manager")
class HealthyManager:
async def is_healthy(self, _worker_id: str) -> bool:
return True
health_module.health_manager = HealthyManager()
sys.modules["api.health_manager"] = health_module
_install_import_stubs()
from api.marketplace import WORKERS_REGISTRY, WorkerCapability
from api.resolver import CapabilityResolver, ResolverConstraints
class CapabilityResolverTests(unittest.IsolatedAsyncioTestCase):
def setUp(self):
self._original_registry = dict(WORKERS_REGISTRY)
WORKERS_REGISTRY.clear()
def tearDown(self):
WORKERS_REGISTRY.clear()
WORKERS_REGISTRY.update(self._original_registry)
def register_worker(self, **overrides) -> WorkerCapability:
values = {
"id": "worker",
"name": "Worker",
"version": "1.0.0",
"last_seen": int(time.time()),
"capabilities": ["vision"],
"cost": 1.0,
"latency": 100.0,
"region": "global",
"gpu": False,
"priority": 10,
}
values.update(overrides)
worker = WorkerCapability(**values)
WORKERS_REGISTRY[worker.id] = worker
return worker
async def test_uses_semver_not_lexicographic_ordering(self):
self.register_worker(id="v2", version="2.0.0", priority=20)
self.register_worker(id="v10", version="10.0.0", priority=10)
worker = await CapabilityResolver.resolve(
"vision",
ResolverConstraints(min_version="2.0.0"),
)
self.assertIsNotNone(worker)
self.assertEqual(worker.id, "v10")
async def test_excludes_prerelease_below_stable_minimum(self):
self.register_worker(id="candidate", version="2.0.0-rc.1", priority=1)
self.register_worker(id="stable", version="2.0.0", priority=10)
worker = await CapabilityResolver.resolve(
"vision",
ResolverConstraints(min_version="2.0.0"),
)
self.assertIsNotNone(worker)
self.assertEqual(worker.id, "stable")
def test_rejects_malformed_minimum_semver(self):
with self.assertRaises(ValidationError):
ResolverConstraints(min_version="2.0")
async def test_excludes_malformed_worker_version_only_when_constrained(self):
self.register_worker(id="malformed", version="not-a-version", priority=1)
self.register_worker(id="valid", version="2.0.0", priority=10)
worker = await CapabilityResolver.resolve(
"vision",
ResolverConstraints(min_version="2.0.0"),
)
self.assertIsNotNone(worker)
self.assertEqual(worker.id, "valid")
async def test_prefers_requested_region_when_available(self):
self.register_worker(id="global", region="global", priority=1)
self.register_worker(id="eu", region="eu-west", priority=20)
worker = await CapabilityResolver.resolve(
"vision",
ResolverConstraints(preferred_region="eu-west"),
)
self.assertIsNotNone(worker)
self.assertEqual(worker.id, "eu")
async def test_falls_back_when_requested_region_is_unavailable(self):
self.register_worker(id="global", region="global", priority=1)
worker = await CapabilityResolver.resolve(
"vision",
ResolverConstraints(preferred_region="eu-west"),
)
self.assertIsNotNone(worker)
self.assertEqual(worker.id, "global")
async def test_applies_priority_threshold_with_lower_values_preferred(self):
self.register_worker(id="allowed", priority=100, cost=10.0)
self.register_worker(id="excluded", priority=101, cost=0.0)
worker = await CapabilityResolver.resolve(
"vision",
ResolverConstraints(min_priority=100),
)
self.assertIsNotNone(worker)
self.assertEqual(worker.id, "allowed")
async def test_preserves_existing_cost_latency_and_gpu_constraints(self):
self.register_worker(
id="cpu",
cost=1.0,
latency=50.0,
gpu=False,
priority=1,
)
self.register_worker(
id="gpu",
cost=2.0,
latency=100.0,
gpu=True,
priority=10,
)
worker = await CapabilityResolver.resolve(
"vision",
ResolverConstraints(
max_cost=2.0,
max_latency=100.0,
require_gpu=True,
),
)
self.assertIsNotNone(worker)
self.assertEqual(worker.id, "gpu")
if __name__ == "__main__":
unittest.main()
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