98 lines
3.0 KiB
Python
98 lines
3.0 KiB
Python
"""Regression tests for max_tokens propagation from config.yaml to AIAgent.
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Covers #20741: `model.max_tokens` was silently dropped before reaching the
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gateway-spawned agent, so providers without a hardcoded default (OpenRouter
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free models, Ollama Cloud, custom OpenAI-compatible endpoints) truncated long
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generations with `finish_reason="length"`.
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Precedence verified here:
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HERMES_MAX_TOKENS env > model.max_tokens > per-provider
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max_output_tokens > None
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"""
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import importlib
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import os
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import sys
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import textwrap
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import pytest
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@pytest.fixture
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def isolated_home(tmp_path, monkeypatch):
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"""Isolated HERMES_HOME with a writable config.yaml and a clean module cache.
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These tests deliberately re-import ``hermes_cli`` / ``gateway`` so each
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config write is read fresh. To avoid leaking that purge into sibling test
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files in the same worker (which breaks their import-time mocks), we snapshot
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the affected modules and restore them on teardown.
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"""
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hermes_home = tmp_path / ".hermes"
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hermes_home.mkdir()
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monkeypatch.setenv("HERMES_HOME", str(hermes_home))
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monkeypatch.delenv("HERMES_MAX_TOKENS", raising=False)
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_saved = {
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k: v
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for k, v in sys.modules.items()
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if k.startswith(("hermes_cli", "gateway"))
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}
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def write_cfg(body: str) -> None:
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(hermes_home / "config.yaml").write_text(textwrap.dedent(body))
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def fresh_gateway():
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for mod in list(sys.modules.keys()):
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if mod.startswith(("hermes_cli", "gateway")):
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del sys.modules[mod]
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return importlib.import_module("gateway.run")
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try:
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yield write_cfg, fresh_gateway
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finally:
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# Drop anything we (re)imported, then restore the pre-test snapshot so
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# the next test file sees the module objects it was loaded with.
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for k in list(sys.modules.keys()):
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if k.startswith(("hermes_cli", "gateway")):
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del sys.modules[k]
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sys.modules.update(_saved)
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def test_top_level_max_tokens_propagates(isolated_home):
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"""model.max_tokens is read into the gateway runtime kwargs (#20741)."""
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write_cfg, fresh_gateway = isolated_home
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write_cfg(
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"""
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model:
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default: glm-5.1
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provider: openrouter
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max_tokens: 16384
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"""
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)
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grun = fresh_gateway()
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kw = grun._resolve_runtime_agent_kwargs()
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assert kw["max_tokens"] == 16384
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def test_per_provider_max_output_tokens_fallback(isolated_home):
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"""A custom provider's max_output_tokens fills in when no global is set."""
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write_cfg, fresh_gateway = isolated_home
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write_cfg(
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"""
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model:
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default: glm-5.1
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provider: mylocal
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providers:
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mylocal:
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api: http://localhost:11434/v1
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api_key: sk-test
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default_model: glm-5.1
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max_output_tokens: 12000
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"""
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)
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grun = fresh_gateway()
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kw = grun._resolve_runtime_agent_kwargs()
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assert kw["max_tokens"] == 12000
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