97 lines
3.3 KiB
Python
97 lines
3.3 KiB
Python
"""Native Gemini output-token reservation at agent init (#57275 claim 4).
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When ``model.max_tokens`` is unset, the native generateContent adapter still
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sends ``maxOutputTokens=65,535`` (GEMINI_DEFAULT_MAX_OUTPUT_TOKENS) — Gemini
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treats an omitted cap as a low internal default, not "unlimited", so the
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adapter always sends an explicit cap. The compressor's trigger is
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``pct × (window − max_tokens)``; constructing it with ``max_tokens=None``
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reserved 0 while the wire reserved 65,535: on a 128K window the trigger
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landed at ~96K against a real safe input budget of ~65K, and the provider
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400'd before compaction ever fired.
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These tests assert the compressor's reservation mirrors the adapter default
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on the native Gemini path, and ONLY there.
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"""
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from unittest.mock import patch
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import agent.context_compressor as cc_mod
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from agent.gemini_native_adapter import GEMINI_DEFAULT_MAX_OUTPUT_TOKENS
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CFG = {"agent": {}}
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def _build_agent(model, base_url, provider="", max_tokens=None, window=131072):
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with (
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patch("run_agent.get_tool_definitions", return_value=[]),
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patch("run_agent.check_toolset_requirements", return_value={}),
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patch("run_agent.OpenAI"),
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patch("hermes_cli.config.load_config", return_value=CFG),
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patch("hermes_cli.config.load_config_readonly", return_value=CFG),
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patch(
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"agent.model_metadata.get_model_context_length", return_value=window,
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),
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patch.object(cc_mod, "get_model_context_length", return_value=window),
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):
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from run_agent import AIAgent
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return AIAgent(
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model=model,
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api_key="test-key-1234567890",
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base_url=base_url,
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provider=provider,
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max_tokens=max_tokens,
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quiet_mode=True,
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skip_context_files=True,
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skip_memory=True,
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)
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def test_native_gemini_unset_max_tokens_reserves_adapter_default():
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agent = _build_agent(
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"gemma-3-27b-it",
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"https://generativelanguage.googleapis.com/v1beta",
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)
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cc = agent.context_compressor
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assert cc.max_tokens == GEMINI_DEFAULT_MAX_OUTPUT_TOKENS
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# Trigger must sit at/below the real safe input budget the wire leaves.
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assert cc.threshold_tokens <= cc.context_length - GEMINI_DEFAULT_MAX_OUTPUT_TOKENS
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def test_gemini_provider_name_also_reserves_default():
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agent = _build_agent(
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"gemini-3.7-flash", "https://example-proxy.invalid/v1", provider="google",
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)
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assert agent.context_compressor.max_tokens == GEMINI_DEFAULT_MAX_OUTPUT_TOKENS
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def test_explicit_max_tokens_wins_over_adapter_default():
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agent = _build_agent(
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"gemma-3-27b-it",
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"https://generativelanguage.googleapis.com/v1beta",
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max_tokens=8192,
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)
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assert agent.context_compressor.max_tokens == 8192
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def test_non_gemini_paths_keep_no_reservation():
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agent = _build_agent(
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"openai/gpt-4.1", "https://openrouter.ai/api/v1",
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)
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assert agent.context_compressor.max_tokens is None
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def test_gemini_openai_compat_endpoint_not_treated_as_native():
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# The /openai compatibility endpoint does not use the native adapter.
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agent = _build_agent(
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"gemma-3-27b-it",
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"https://generativelanguage.googleapis.com/v1beta/openai",
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)
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assert agent.context_compressor.max_tokens is None
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