File size: 5,908 Bytes
b729ea0 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 | """Regression test for the `/model` picker confirmation display.
Bug (April 2026): after choosing a model from the interactive `/model` picker,
``HermesCLI._apply_model_switch_result()`` printed ``ModelInfo.context_window``
straight from models.dev, which always reports the vendor-wide value (e.g.
gpt-5.5 = 1,050,000 on ``openai``). That ignored provider-specific caps — in
particular, ChatGPT Codex OAuth enforces 272K on the same slug. The sibling
``_handle_model_switch()`` (typed ``/model <name>``) was already fixed to use
``resolve_display_context_length()``; the picker path was missed, causing
"sometimes 1M, sometimes 272K" for the same model across sibling UI paths.
Fix: both display paths now go through ``resolve_display_context_length()``.
"""
from __future__ import annotations
from unittest.mock import patch
from hermes_cli.model_switch import ModelSwitchResult
class _FakeModelInfo:
context_window = 1_050_000
max_output = 0
def has_cost_data(self):
return False
def format_capabilities(self):
return ""
class _StubCLI:
"""Minimum attrs ``_apply_model_switch_result`` reads on ``self``."""
def _stage_and_swap_model(self, result, old_model):
# Staging + in-place swap lives in a helper; run the real one on this stub.
import cli as _cli_mod
return _cli_mod.HermesCLI._stage_and_swap_model(self, result, old_model)
agent = None
model = ""
provider = ""
requested_provider = ""
api_key = ""
_explicit_api_key = ""
base_url = ""
_explicit_base_url = ""
api_mode = ""
_pending_model_switch_note = ""
def _run_display(monkeypatch, result):
import cli as cli_mod
captured: list[str] = []
monkeypatch.setattr(cli_mod, "_cprint", lambda s, *a, **k: captured.append(str(s)))
# Avoid writing to ~/.hermes/config.yaml during the test.
monkeypatch.setattr(cli_mod, "save_config_value", lambda *a, **k: None)
cli_mod.HermesCLI._apply_model_switch_result(_StubCLI(), result, False)
return captured
def test_picker_path_uses_provider_aware_context_on_codex(monkeypatch):
"""``_apply_model_switch_result`` must prefer the provider-aware resolver
(272K on Codex) over the raw models.dev value (1.05M for gpt-5.5).
"""
result = ModelSwitchResult(
success=True,
new_model="gpt-5.5",
target_provider="openai-codex",
provider_changed=True,
api_key="",
base_url="https://chatgpt.com/backend-api/codex",
api_mode="codex_responses",
warning_message="",
provider_label="ChatGPT Codex",
resolved_via_alias=False,
capabilities=None,
model_info=_FakeModelInfo(), # models.dev says 1.05M
is_global=False,
)
with patch(
"agent.model_metadata.get_model_context_length",
return_value=272_000,
):
lines = _run_display(monkeypatch, result)
ctx_line = next((l for l in lines if "Context:" in l), "")
assert "272,000" in ctx_line, (
f"picker-path display must show Codex's 272K cap, got: {ctx_line!r}"
)
assert "1,050,000" not in ctx_line, (
f"picker-path display leaked models.dev's 1.05M for Codex: {ctx_line!r}"
)
def test_picker_path_falls_back_to_model_info_when_resolver_empty(monkeypatch):
"""If ``get_model_context_length`` returns nothing (rare — truly unknown
endpoint), the display still surfaces ``ModelInfo.context_window`` so the
user sees *something* rather than a silent blank.
"""
result = ModelSwitchResult(
success=True,
new_model="some-model",
target_provider="some-provider",
provider_changed=True,
api_key="",
base_url="",
api_mode="chat_completions",
warning_message="",
provider_label="Some Provider",
resolved_via_alias=False,
capabilities=None,
model_info=_FakeModelInfo(), # context_window = 1_050_000
is_global=False,
)
with patch(
"agent.model_metadata.get_model_context_length",
return_value=None,
):
lines = _run_display(monkeypatch, result)
ctx_line = next((l for l in lines if "Context:" in l), "")
assert "1,050,000" in ctx_line, (
f"resolver-empty path should fall back to ModelInfo, got: {ctx_line!r}"
)
def test_global_switch_clears_context_pin_owned_by_previous_route(monkeypatch):
import cli as cli_mod
writes = []
monkeypatch.setattr(cli_mod, "_cprint", lambda *_a, **_k: None)
monkeypatch.setattr(
"utils.atomic_roundtrip_yaml_update",
lambda path, key, value: writes.append((key, value)),
)
cli = _StubCLI()
cli.model = "shared-model"
cli.provider = "custom"
# Runtime may already diverge from persisted config through a session override.
cli.base_url = "https://small.example/v1"
result = ModelSwitchResult(
success=True,
new_model="shared-model",
target_provider="custom",
provider_changed=False,
api_key="",
base_url="https://small.example/v1",
api_mode="chat_completions",
warning_message="",
provider_label="Custom",
resolved_via_alias=False,
capabilities=None,
model_info=_FakeModelInfo(),
is_global=True,
)
configured = {
"model": {
"default": "shared-model",
"provider": "custom",
"base_url": "https://large.example/v1",
"context_length": 1_048_576,
}
}
with (
patch(
"agent.model_metadata.get_model_context_length",
return_value=256_000,
),
patch("hermes_cli.config.read_user_config_raw", return_value=configured),
):
cli_mod.HermesCLI._apply_model_switch_result(cli, result, True)
assert ("model.context_length", None) in writes
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