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hermes-agent/tests/agent/test_credential_pool_routing.py
Teknium 6b81590c55
test: prune low-value tests suite-wide (wave 1) — 46,820 → 28,106 test functions 
Systematic prune per AGENTS.md test policy, one pass over every major
test tree (gateway, hermes_cli, tools, agent, run_agent, plugins, cli,
cron, tui_gateway, honcho/openviking, root-level):

- DELETE: source-reading tests (read_text/getsource on prod files),
  change-detector tests (exact catalog counts, model-name snapshots,
  config version literals), mock-echo tests (assert a mock returns what
  it was told), assertion-free/trivial tests, near-duplicate
  parametrizations (boundaries + one representative kept), async/sync
  twin duplicates, cosmetic within-file variations.
- KEEP (mandatory): security/redaction/approval guards, message-role
  alternation invariants, prompt-caching/deterministic-call-id
  invariants, issue-number regression tests (deduped), E2E tests.
- 6 test files deleted outright (script-style/no-assert or fully
  redundant); conftest.py, fakes/, fixtures/ untouched.
- tests/acp/conftest.py added: autouse fixture stubs the live
  models.dev/GitHub/Copilot/Anthropic inventory fetches that ACP server
  tests performed on every session create — test_server.py 147s → 3.4s,
  and the tests are now genuinely hermetic.
- Sleep-based slowness shrunk where safe (codex_ttfb_watchdog,
  compression_concurrent_fork, etc.); no wall-clock assertion tightened.

Verification: full hermetic suite via scripts/run_tests.sh —
2439 files, 31,130 tests passed, 0 failed, 0 flaky retries, 315s wall
(baseline: 583s wall, 13,564s subprocess CPU).
2026-07-29 13:10:23 -07:00

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"""Tests for credential pool preservation through turn config and 429 recovery.
Covers:
1. CLI _resolve_turn_agent_config passes credential_pool to runtime dict
2. Gateway _resolve_turn_agent_config passes credential_pool to runtime dict
3. Eager fallback deferred when credential pool has credentials
4. Eager fallback fires when no credential pool exists
5. Full 429 rotation cycle: retry-same → rotate → exhaust → fallback
6. Failure attribution: the entry matching the failing API key is marked
exhausted, not whatever pool.current() happens to point at
"""
import json
import time
from types import SimpleNamespace
from unittest.mock import MagicMock, patch
# ---------------------------------------------------------------------------
# 1. CLI _resolve_turn_agent_config includes credential_pool
# ---------------------------------------------------------------------------
class TestCliTurnRoutePool:
def test_resolve_turn_includes_pool(self):
"""CLI's _resolve_turn_agent_config must pass credential_pool in runtime."""
fake_pool = MagicMock(name="FakePool")
shell = SimpleNamespace(
model="gpt-5.4",
api_key="sk-test",
base_url=None,
provider="openai-codex",
requested_provider="my-named-provider",
api_mode="codex_responses",
acp_command=None,
acp_args=[],
_credential_pool=fake_pool,
service_tier=None,
)
from cli import HermesCLI
bound = HermesCLI._resolve_turn_agent_config.__get__(shell)
route = bound("test message")
assert route["runtime"]["credential_pool"] is fake_pool
assert route["runtime"]["requested_provider"] == "my-named-provider"
assert "my-named-provider" in route["signature"]
shell.requested_provider = "other-named-provider"
other_route = bound("test message")
assert other_route["signature"] != route["signature"]
# ---------------------------------------------------------------------------
# 2. Gateway _resolve_turn_agent_config includes credential_pool
# ---------------------------------------------------------------------------
class TestGatewayTurnRoutePool:
def test_resolve_turn_includes_pool(self):
"""Gateway's _resolve_turn_agent_config must pass credential_pool."""
from gateway.run import GatewayRunner
fake_pool = MagicMock(name="FakePool")
runner = SimpleNamespace(_service_tier=None)
runtime_kwargs = {
"api_key": "***",
"base_url": None,
"provider": "openai-codex",
"requested_provider": "openai-codex",
"api_mode": "codex_responses",
"command": None,
"args": [],
"credential_pool": fake_pool,
}
bound = GatewayRunner._resolve_turn_agent_config.__get__(runner)
route = bound("test message", "gpt-5.4", runtime_kwargs)
assert route["runtime"]["credential_pool"] is fake_pool
assert route["runtime"]["requested_provider"] == "openai-codex"
# ---------------------------------------------------------------------------
# 3 & 4. Eager fallback deferred/fires based on credential pool
# ---------------------------------------------------------------------------
class TestEagerFallbackWithPool:
"""Test the eager fallback guard in run_agent.py's error handling loop."""
def _make_agent(self, has_pool=True, pool_has_creds=True, has_fallback=True):
"""Create a minimal AIAgent mock with the fields needed."""
from run_agent import AIAgent
with patch.object(AIAgent, "__init__", lambda self, **kw: None):
agent = AIAgent()
agent._credential_pool = None
if has_pool:
pool = MagicMock()
pool.has_available.return_value = pool_has_creds
agent._credential_pool = pool
agent._fallback_chain = [{"model": "fallback/model"}] if has_fallback else []
agent._fallback_index = 0
agent._try_activate_fallback = MagicMock(return_value=True)
agent._emit_status = MagicMock()
return agent
def test_eager_fallback_deferred_when_pool_has_credentials(self):
"""429 with active pool should NOT trigger eager fallback."""
agent = self._make_agent(has_pool=True, pool_has_creds=True, has_fallback=True)
# Simulate the check from run_agent.py lines 7180-7191
is_rate_limited = True
if is_rate_limited and agent._fallback_index < len(agent._fallback_chain):
pool = agent._credential_pool
pool_may_recover = pool is not None and pool.has_available()
if not pool_may_recover:
agent._try_activate_fallback()
agent._try_activate_fallback.assert_not_called()
def test_eager_fallback_fires_when_no_pool(self):
"""429 without pool should trigger eager fallback."""
agent = self._make_agent(has_pool=False, has_fallback=True)
is_rate_limited = True
if is_rate_limited and agent._fallback_index < len(agent._fallback_chain):
pool = agent._credential_pool
pool_may_recover = pool is not None and pool.has_available()
if not pool_may_recover:
agent._try_activate_fallback()
agent._try_activate_fallback.assert_called_once()
def test_eager_fallback_fires_when_pool_exhausted(self):
"""429 with exhausted pool should trigger eager fallback."""
agent = self._make_agent(has_pool=True, pool_has_creds=False, has_fallback=True)
is_rate_limited = True
if is_rate_limited and agent._fallback_index < len(agent._fallback_chain):
pool = agent._credential_pool
pool_may_recover = pool is not None and pool.has_available()
if not pool_may_recover:
agent._try_activate_fallback()
agent._try_activate_fallback.assert_called_once()
# ---------------------------------------------------------------------------
# 5. Full 429 rotation cycle via _recover_with_credential_pool
# ---------------------------------------------------------------------------
class TestPoolRotationCycle:
"""Verify the retry-same → rotate → exhaust flow in _recover_with_credential_pool."""
def _make_agent_with_pool(self, pool_entries=3):
from run_agent import AIAgent
with patch.object(AIAgent, "__init__", lambda self, **kw: None):
agent = AIAgent()
entries = []
for i in range(pool_entries):
e = MagicMock(name=f"entry_{i}")
e.id = f"cred-{i}"
entries.append(e)
pool = MagicMock()
pool.has_credentials.return_value = True
# Must be set explicitly — MagicMock.provider returns a truthy
# child mock, which would trigger the provider-mismatch guard.
pool.provider = ""
# mark_exhausted_and_rotate returns next entry until exhausted
self._rotation_index = 0
def rotate(status_code=None, error_context=None, **_kwargs):
self._rotation_index += 1
if self._rotation_index < pool_entries:
return entries[self._rotation_index]
pool.has_credentials.return_value = False
return None
pool.mark_exhausted_and_rotate = MagicMock(side_effect=rotate)
agent._credential_pool = pool
agent._swap_credential = MagicMock()
agent.log_prefix = ""
agent.api_key = "test-api-key"
agent.provider = "test-provider"
pool.provider = "test-provider"
return agent, pool, entries
def test_first_429_sets_retry_flag_no_rotation(self):
"""First 429 should just set has_retried_429=True, no rotation."""
agent, pool, _ = self._make_agent_with_pool(3)
recovered, has_retried = agent._recover_with_credential_pool(
status_code=429, has_retried_429=False
)
assert recovered is False
assert has_retried is True
pool.mark_exhausted_and_rotate.assert_not_called()
def test_second_429_rotates_to_next(self):
"""Second consecutive 429 should rotate to next credential."""
agent, pool, entries = self._make_agent_with_pool(3)
recovered, has_retried = agent._recover_with_credential_pool(
status_code=429, has_retried_429=True
)
assert recovered is True
assert has_retried is False # reset after rotation
pool.mark_exhausted_and_rotate.assert_called_once_with(status_code=429, error_context=None, api_key_hint="test-api-key")
agent._swap_credential.assert_called_once_with(entries[1])
def test_pool_exhaustion_returns_false(self):
"""When all credentials exhausted, recovery should return False."""
agent, pool, _ = self._make_agent_with_pool(1)
# First 429 sets flag
_, has_retried = agent._recover_with_credential_pool(
status_code=429, has_retried_429=False
)
assert has_retried is True
# Second 429 tries to rotate but pool is exhausted (only 1 entry)
recovered, _ = agent._recover_with_credential_pool(
status_code=429, has_retried_429=True
)
assert recovered is False
def test_402_immediate_rotation(self):
"""402 (billing) should immediately rotate, no retry-first."""
agent, pool, entries = self._make_agent_with_pool(3)
recovered, has_retried = agent._recover_with_credential_pool(
status_code=402, has_retried_429=False
)
assert recovered is True
assert has_retried is False
pool.mark_exhausted_and_rotate.assert_called_once_with(status_code=402, error_context=None, api_key_hint="test-api-key")
def test_api_key_hint_from_pool_current_when_agent_key_missing(self):
"""api_key_hint should fall back to pool.current().runtime_api_key
when agent.api_key is not set (#43747)."""
from run_agent import AIAgent
with patch.object(AIAgent, "__init__", lambda self, **kw: None):
agent = AIAgent()
e0 = MagicMock(name="entry_0")
e0.id = "cred-0"
e1 = MagicMock(name="entry_1")
e1.id = "cred-1"
pool = MagicMock()
pool.has_credentials.return_value = True
pool.provider = "test-provider"
agent.provider = "test-provider"
# current entry has a runtime_api_key
cur_entry = MagicMock()
cur_entry.runtime_api_key = "pool-current-key"
pool.current.return_value = cur_entry
pool.mark_exhausted_and_rotate.return_value = e1
agent._credential_pool = pool
agent._swap_credential = MagicMock()
agent.log_prefix = ""
# No agent.api_key set — should fall back to pool.current().runtime_api_key
recovered, has_retried = agent._recover_with_credential_pool(
status_code=402, has_retried_429=False
)
assert recovered is True
pool.mark_exhausted_and_rotate.assert_called_once_with(
status_code=402, error_context=None, api_key_hint="pool-current-key"
)
# ---------------------------------------------------------------------------
# 6. Real-pool regression: the hint routes exhaustion to the FAILED entry
# ---------------------------------------------------------------------------
class TestApiKeyHintRealPool:
"""Prove the routing guarantee through the real CredentialPool selector:
when the failed key differs from the pool's current/first entry, only the
failed entry is marked exhausted (#43747, wrong-entry marking)."""
def _seed_pool(self, tmp_path, monkeypatch):
import json
hermes_home = tmp_path / "hermes"
hermes_home.mkdir(parents=True, exist_ok=True)
(hermes_home / "auth.json").write_text(
json.dumps(
{
"version": 1,
"providers": {},
"credential_pool": {
"openrouter": [
{
"id": "cred-healthy",
"label": "healthy",
"auth_type": "api_key",
"priority": 0,
"source": "manual",
"access_token": "sk-or-healthy",
},
{
"id": "cred-failed",
"label": "failed",
"auth_type": "api_key",
"priority": 1,
"source": "manual",
"access_token": "sk-or-failed",
},
]
},
}
)
)
monkeypatch.setenv("HERMES_HOME", str(hermes_home))
from agent.credential_pool import load_pool
return load_pool("openrouter")
def test_hint_marks_failed_entry_not_current(self, tmp_path, monkeypatch):
pool = self._seed_pool(tmp_path, monkeypatch)
# Another process/pool instance issued sk-or-failed; THIS pool's
# current() would resolve to the first (healthy) entry.
assert pool.select().access_token == "sk-or-healthy"
next_entry = pool.mark_exhausted_and_rotate(
status_code=429,
error_context={"reason": "rate_limit_exceeded"},
api_key_hint="sk-or-failed",
)
statuses = {e.id: e.last_status for e in pool._entries}
assert statuses["cred-failed"] == "exhausted"
assert statuses["cred-healthy"] in (None, "ok")
assert next_entry is not None
assert next_entry.access_token == "sk-or-healthy"
def test_without_hint_current_entry_is_marked(self, tmp_path, monkeypatch):
"""Baseline: no hint falls back to current() — the pre-fix behavior."""
pool = self._seed_pool(tmp_path, monkeypatch)
assert pool.select().access_token == "sk-or-healthy"
pool.mark_exhausted_and_rotate(status_code=429, error_context=None)
statuses = {e.id: e.last_status for e in pool._entries}
assert statuses["cred-healthy"] == "exhausted"
assert statuses["cred-failed"] in (None, "ok")
# ---------------------------------------------------------------------------
# 7. Failure attribution — mark the key that failed, not pool.current()
# ---------------------------------------------------------------------------
class TestFailureAttribution:
"""Regression: recover_with_credential_pool must mark the entry whose API
key actually produced the failure.
pool.current() is shared mutable state: round-robin select() advances it,
concurrent turns move it, and a freshly loaded pool (second process) has
current() == None — in which case the old code fell through to
_select_unlocked() and exhausted the NEXT (healthy) entry, copying the
failing key's error/reset time onto it until the whole pool went offline.
"""
def _make_pool(self, tmp_path, monkeypatch, entries):
monkeypatch.setenv("HERMES_HOME", str(tmp_path / "hermes"))
hermes_home = tmp_path / "hermes"
hermes_home.mkdir(parents=True, exist_ok=True)
(hermes_home / "auth.json").write_text(
json.dumps({"version": 1, "credential_pool": {"anthropic": entries}})
)
from agent.credential_pool import load_pool
return load_pool("anthropic")
def _entry(self, idx, key, **overrides):
entry = {
"id": f"cred-{idx}",
"label": f"key-{idx}",
"auth_type": "api_key",
"priority": idx,
"source": "manual",
"access_token": key,
}
entry.update(overrides)
return entry
def _agent(self, pool, failing_key, credential_id=None):
return SimpleNamespace(
provider="anthropic",
api_key=failing_key,
_credential_pool=pool,
_credential_pool_entry_id=credential_id,
_swap_credential=MagicMock(),
)
def _statuses(self, pool):
return {e.id: e.last_status for e in pool.entries()}
def test_pre_exhausted_check_uses_failing_key(self, tmp_path, monkeypatch):
"""The 'already exhausted → rotate immediately' check must inspect the
failing entry, not pool.current(): first 429 on an already-exhausted
key rotates without burning a retry."""
pool = self._make_pool(
tmp_path, monkeypatch,
[
self._entry(0, "key-a"),
self._entry(
1, "key-b",
last_status="exhausted",
last_status_at=time.time(),
last_error_code=429,
),
],
)
agent = self._agent(pool, failing_key="key-b")
from agent.agent_runtime_helpers import recover_with_credential_pool
recovered, has_retried = recover_with_credential_pool(
agent, status_code=429, has_retried_429=False
)
assert recovered is True
assert has_retried is False
statuses = self._statuses(pool)
assert statuses["cred-0"] != "exhausted"
swapped = agent._swap_credential.call_args[0][0]
assert swapped.id == "cred-0"
def test_auth_refresh_targets_failing_key_not_pointer(self, tmp_path, monkeypatch):
"""The auth path must refresh the entry that supplied the failing key,
not current(). With current() pointing at healthy A while key B failed,
try_refresh_current() force-refreshes A — for non-OAuth entries a
forced refresh marks the entry exhausted outright — so healthy A dies,
the hinted rotation then exhausts B, and the pool has nothing left."""
pool = self._make_pool(
tmp_path, monkeypatch,
[self._entry(0, "key-a"), self._entry(1, "key-b")],
)
# Point the shared cursor at the healthy entry, as a concurrent
# turn's select() would.
selected = pool.select()
assert selected.id == "cred-0"
assert pool.current().id == "cred-0"
agent = self._agent(pool, failing_key="key-b")
agent._is_entitlement_failure = MagicMock(return_value=False)
from agent.agent_runtime_helpers import recover_with_credential_pool
recovered, _ = recover_with_credential_pool(
agent, status_code=401, has_retried_429=False
)
assert recovered is True
statuses = self._statuses(pool)
assert statuses["cred-1"] == "exhausted"
assert statuses["cred-0"] != "exhausted"
swapped = agent._swap_credential.call_args[0][0]
assert swapped.id == "cred-0"
def test_unmatched_key_does_not_retry_only_pool_entry(
self, tmp_path, monkeypatch
):
"""Legacy agents without a stable id must stop when an unmatched key
has no different credential to rotate to."""
pool = self._make_pool(
tmp_path, monkeypatch,
[self._entry(0, "pool-runtime-key")],
)
agent = self._agent(pool, failing_key="wrapper-runtime-key")
agent._is_entitlement_failure = MagicMock(return_value=False)
from agent.agent_runtime_helpers import recover_with_credential_pool
recovered, _ = recover_with_credential_pool(
agent, status_code=401, has_retried_429=False
)
assert recovered is False
assert self._statuses(pool)["cred-0"] != "exhausted"
agent._swap_credential.assert_not_called()
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