emma-hermes/tests/gateway/test_48031_model_switch_aft...

92 lines
3.8 KiB
Python

"""Regression test for #48031 — /model switch lost after session auto-reset.
When `/model X` is the FIRST message after an idle/daily/suspended auto-reset,
it stores a session model override but the `was_auto_reset` flag is left True
(the slash-command path doesn't pass through the message handler that consumes
it). On the NEXT regular message, the auto-reset cleanup block in
`_handle_message_with_agent` pops the freshly-stored override BEFORE the flag
is consumed, so the switch is silently lost and resolution falls back to the
config default — while the session DB still shows the switched model (a
two-sources-of-truth divergence).
The fix consumes `was_auto_reset` at two sites:
1. the cleanup block in gateway/run.py captures it into a local and sets the
attribute False immediately (so it can't re-fire next message);
2. the slash-command model path in gateway/slash_commands.py consumes it
before storing the override (so a /model-first-after-reset isn't wiped).
These are AST invariants — load-bearing pins that fail if either consume is
removed (mirrors test_35809_auto_reset_clean_context.py's approach).
"""
from __future__ import annotations
import ast
import inspect
from gateway import run as gateway_run
from gateway import slash_commands as gateway_slash
def _assigns_false(node: ast.AST, attr: str) -> bool:
"""True if `node` contains an assignment `<something>.<attr> = False`."""
for sub in ast.walk(node):
if isinstance(sub, ast.Assign):
for tgt in sub.targets:
if (
isinstance(tgt, ast.Attribute)
and tgt.attr == attr
and isinstance(sub.value, ast.Constant)
and sub.value.value is False
):
return True
return False
def test_run_consumes_was_auto_reset_in_cleanup_block():
"""The auto-reset cleanup block in gateway/run.py must set
`session_entry.was_auto_reset = False` so the cleanup (which pops the
session model/reasoning overrides) cannot re-fire on the next message and
wipe an override stored between turns (#48031)."""
tree = ast.parse(inspect.getsource(gateway_run))
# Find the cleanup branch: an `if <flag>:` block that pops a model/reasoning
# override AND clears the flag. We assert at least one such block sets
# was_auto_reset False.
found = False
for node in ast.walk(tree):
if not isinstance(node, ast.If):
continue
names = {
n.attr
for n in ast.walk(node)
if isinstance(n, ast.Attribute)
}
calls = {
n.func.attr
for n in ast.walk(node)
if isinstance(n, ast.Call) and isinstance(n.func, ast.Attribute)
}
# The cleanup block references the reasoning-override setter and pops
# pending model notes — fingerprint of the transient-state cleanup.
if "_set_session_reasoning_override" in calls and _assigns_false(node, "was_auto_reset"):
found = True
break
assert found, (
"gateway/run.py auto-reset cleanup block must consume "
"`was_auto_reset` (set it False) so it can't re-fire and wipe a "
"model override stored between turns (#48031)."
)
def test_slash_command_model_path_consumes_was_auto_reset():
"""The slash-command model path in gateway/slash_commands.py must consume
`was_auto_reset` before storing the new model override, so a
/model-first-after-auto-reset isn't wiped by the next message's cleanup
(#48031)."""
src = inspect.getsource(gateway_slash)
tree = ast.parse(src)
assert _assigns_false(tree, "was_auto_reset"), (
"gateway/slash_commands.py model path must set "
"`was_auto_reset = False` before storing the model override (#48031)."
)