hermes-agent/tests/run_agent/test_anthropic_truncation_continuation.py
kshitij 5fba236644
chore: ruff auto-fix PLR6201 resweep — tuple → set in membership tests (#27355)
Six days after #23937 (608 fixes) the codebase had accumulated 241 new
PLR6201 violations. Same mechanical `x in (...)` → `x in {...}` fix,
same zero-risk profile: set lookup is O(1) vs O(n) for tuple and the
two are semantically equivalent for hashable scalar membership tests.

All 241 instances fixed via `ruff check --select PLR6201 --fix
--unsafe-fixes`, zero remaining. Every changed value is a hashable
scalar (str/int/None/enum/signal); no risk of unhashable runtime
errors. No behavior change.

Test plan:
- 119 files changed, +244/-244 (net zero) — exactly one-line edits
- `ruff check` clean afterward
- Compile checks pass on the largest touched files (cli.py, run_agent.py,
  gateway/run.py, gateway/platforms/discord.py, model_tools.py)
- Subset broad test run on tests/gateway/ tests/hermes_cli/ tests/agent/
  tests/tools/: 18187 passed, 59 pre-existing failures (verified against
  origin/main with the same shape — identical failure count, identical
  category — all xdist test-order flakes unrelated to this change)

Follows the same template as PR #23937 ([tracker: #23972](https://github.com/NousResearch/hermes-agent/issues/23972)).
2026-05-17 02:29:41 -07:00

114 lines
4.6 KiB
Python

"""Regression test for anthropic_messages truncation continuation.
When an Anthropic response hits ``stop_reason: max_tokens`` (mapped to
``finish_reason == 'length'`` in run_agent), the agent must retry with
a continuation prompt — the same behavior it has always had for
chat_completions and bedrock_converse. Before this PR, the
``if self.api_mode in ('chat_completions', 'bedrock_converse'):`` guard
silently dropped Anthropic-wire truncations on the floor, returning a
half-finished response with no retry.
We don't exercise the full agent loop here (it's 3000 lines of inference,
streaming, plugin hooks, etc.) — instead we verify the normalization
adapter produces exactly the shape the continuation block now consumes.
"""
from __future__ import annotations
from types import SimpleNamespace
import pytest
def _make_anthropic_text_block(text: str) -> SimpleNamespace:
return SimpleNamespace(type="text", text=text)
def _make_anthropic_tool_use_block(name: str = "my_tool") -> SimpleNamespace:
return SimpleNamespace(
type="tool_use",
id="toolu_01",
name=name,
input={"foo": "bar"},
)
def _make_anthropic_response(blocks, stop_reason: str = "max_tokens"):
return SimpleNamespace(
id="msg_01",
type="message",
role="assistant",
model="claude-sonnet-4-6",
content=blocks,
stop_reason=stop_reason,
stop_sequence=None,
usage=SimpleNamespace(input_tokens=100, output_tokens=200),
)
class TestTruncatedAnthropicResponseNormalization:
"""AnthropicTransport.normalize_response() gives us the shape _build_assistant_message expects."""
def test_text_only_truncation_produces_text_content_no_tool_calls(self):
"""Pure-text Anthropic truncation → continuation path should fire."""
from agent.transports import get_transport
response = _make_anthropic_response(
[_make_anthropic_text_block("partial response that was cut off")]
)
nr = get_transport("anthropic_messages").normalize_response(response)
# The continuation block checks these two attributes:
# assistant_message.content → appended to truncated_response_parts
# assistant_message.tool_calls → guards the text-retry branch
assert nr.content is not None
assert "partial response" in nr.content
assert not nr.tool_calls, (
"Pure-text truncation must have no tool_calls so the text-continuation "
"branch (not the tool-retry branch) fires"
)
assert nr.finish_reason == "length", "max_tokens stop_reason must map to OpenAI-style 'length'"
def test_truncated_tool_call_produces_tool_calls(self):
"""Tool-use truncation → tool-call retry path should fire."""
from agent.transports import get_transport
response = _make_anthropic_response(
[
_make_anthropic_text_block("thinking..."),
_make_anthropic_tool_use_block(),
]
)
nr = get_transport("anthropic_messages").normalize_response(response)
assert bool(nr.tool_calls), (
"Truncation mid-tool_use must expose tool_calls so the "
"tool-call retry branch fires instead of text continuation"
)
assert nr.finish_reason == "length"
def test_empty_content_does_not_crash(self):
"""Empty response.content — defensive: treat as a truncation with no text."""
from agent.transports import get_transport
response = _make_anthropic_response([])
nr = get_transport("anthropic_messages").normalize_response(response)
# Depending on the adapter, content may be "" or None — both are
# acceptable; what matters is no exception.
assert nr is not None
assert not nr.tool_calls
class TestContinuationLogicBranching:
"""Symbolic check that the api_mode gate now includes anthropic_messages."""
@pytest.mark.parametrize("api_mode", ["chat_completions", "bedrock_converse", "anthropic_messages"])
def test_all_three_api_modes_hit_continuation_branch(self, api_mode):
# The guard in run_agent.py is:
# if self.api_mode in ("chat_completions", "bedrock_converse", "anthropic_messages"):
assert api_mode in {"chat_completions", "bedrock_converse", "anthropic_messages"}
def test_codex_responses_still_excluded(self):
# codex_responses has its own truncation path (not continuation-based)
# and should NOT be routed through the shared block.
assert "codex_responses" not in {"chat_completions", "bedrock_converse", "anthropic_messages"}