hermes-agent/tests/agent/test_compression_progress.py
Teknium 6b81590c55
test: prune low-value tests suite-wide (wave 1) — 46,820 → 28,106 test functions
Systematic prune per AGENTS.md test policy, one pass over every major
test tree (gateway, hermes_cli, tools, agent, run_agent, plugins, cli,
cron, tui_gateway, honcho/openviking, root-level):

- DELETE: source-reading tests (read_text/getsource on prod files),
  change-detector tests (exact catalog counts, model-name snapshots,
  config version literals), mock-echo tests (assert a mock returns what
  it was told), assertion-free/trivial tests, near-duplicate
  parametrizations (boundaries + one representative kept), async/sync
  twin duplicates, cosmetic within-file variations.
- KEEP (mandatory): security/redaction/approval guards, message-role
  alternation invariants, prompt-caching/deterministic-call-id
  invariants, issue-number regression tests (deduped), E2E tests.
- 6 test files deleted outright (script-style/no-assert or fully
  redundant); conftest.py, fakes/, fixtures/ untouched.
- tests/acp/conftest.py added: autouse fixture stubs the live
  models.dev/GitHub/Copilot/Anthropic inventory fetches that ACP server
  tests performed on every session create — test_server.py 147s → 3.4s,
  and the tests are now genuinely hermetic.
- Sleep-based slowness shrunk where safe (codex_ttfb_watchdog,
  compression_concurrent_fork, etc.); no wall-clock assertion tightened.

Verification: full hermetic suite via scripts/run_tests.sh —
2439 files, 31,130 tests passed, 0 failed, 0 flaky retries, 315s wall
(baseline: 583s wall, 13,564s subprocess CPU).
2026-07-29 13:10:23 -07:00

70 lines
2.5 KiB
Python

"""Regression: detect compression progress by tokens, not just rows.
Issue #39548: preflight compression in the turn prologue was checking
``len(messages) >= _orig_len`` to decide "Cannot compress further". This
false-positives when a pass summarises message contents — reducing the
estimated request token count without removing any rows — and surfaces a
spurious ``Context length exceeded`` failure followed by an auto-reset of
an otherwise healthy session.
These tests pin the contract of ``_compression_made_progress``: a
row-count reduction OR a *material* (>5%) token-count reduction counts as
progress.
"""
from __future__ import annotations
from agent.turn_context import (
_compression_made_progress,
_compression_warrants_another_preflight_pass,
)
class TestCompressionMadeProgress:
def test_rows_reduced_counts_as_progress(self):
"""Removing message rows is the obvious progress signal."""
assert _compression_made_progress(
orig_len=10, new_len=5, orig_tokens=1000, new_tokens=1000
) is True
def test_neither_moved_means_no_progress(self):
"""The genuine "stuck" case — same rows, same tokens, give up."""
assert _compression_made_progress(
orig_len=10, new_len=10, orig_tokens=1000, new_tokens=1000
) is False
def test_sub_5pct_token_drop_is_not_progress(self):
"""A token reduction below the 5% material floor does NOT count as
progress — matching the overflow-handler retry path (#39550) so a
marginal wobble can't keep the multi-pass loop spinning."""
# 1000 -> 970 is a 3% drop, below the 5% floor.
assert _compression_made_progress(
orig_len=10, new_len=10, orig_tokens=1000, new_tokens=970
) is False
# 1000 -> 940 is a 6% drop, above the floor.
assert _compression_made_progress(
orig_len=10, new_len=10, orig_tokens=1000, new_tokens=940
) is True
class TestCompressionWarrantsAnotherPreflightPass:
def test_material_reduction_above_threshold_allows_another_pass(self):
assert _compression_warrants_another_preflight_pass(
orig_tokens=400_000,
new_tokens=350_000,
threshold_tokens=272_000,
) is True
def test_marginal_reduction_above_threshold_stops(self):
assert _compression_warrants_another_preflight_pass(
orig_tokens=350_000,
new_tokens=345_000,
threshold_tokens=272_000,
) is False