hermes-agent/tests/tools/test_terminal_compound_background.py
Teknium 39975613b1
test: prune wave 2 + speed fixes — 28,106 → 19,757 test functions, suite wall 315s → 294s
Second, deeper pass over tools/gateway/hermes_cli plus first pass over
the trees wave 1 missed (acp, acp_adapter, skills, computer_use, docker,
dashboard, conformance, monitoring, secret_sources, hermes_state,
providers). Same rubric as wave 1 (AGENTS.md test policy); security,
alternation/caching invariants, issue-number regressions, and E2E kept.

Real test-quality fixes found and rooted out along the way:
- tests/tools/test_command_guards.py made real auxiliary-LLM HTTPS calls
  (DEFAULT_CONFIG smart-approval leaked in) — pinned approval
  mode=manual via autouse fixture: 17.4s → 0.4s.
- test_model_switch_custom_providers.py / test_user_providers_model_switch.py
  silently probed live provider catalogs (~2s/test) — stubbed
  cached_provider_model_ids/provider_model_ids/fetch_api_models.
- test_telegram_noise_filter.py: 15-platform copy-paste matrix over
  shared gateway.run logic → 3 representative platforms (55s → 3.9s).
- test_gateway_shutdown.py: stop()'s 5s interrupt-deadline loop spun on
  MagicMock agents — interrupt.side_effect now clears _running_agents
  (22s → 1.0s).
- test_gateway_inactivity_timeout.py poll-harness timings shrunk 3-5x
  (24s → 1.1s); test_mcp_stability.py backoff/SIGTERM-grace sleeps
  patched (15.4s → 2.5s); test_async_delegation.py negative-drain wait
  5s → 0.5s.
- test_telegram_init_deadline.py: loop-block margin restored to 1.0s
  with rationale comment — the watchdog-dump assertion needs the loop
  blocked well past deadline+grace under parallel load (flaked once in
  the 40-worker verification run at a 0.2s margin).

Verification: full hermetic suite via scripts/run_tests.sh —
2,438 files, 21,718 tests passed, 0 failed, 293.9s wall.
Suite totals vs original baseline: 46,820 → 19,757 test functions
(−57.8%), wall 583.5s → 293.9s (−50%), subprocess CPU 13,564s → 11,623s.
2026-07-29 13:39:40 -07:00

102 lines
3.2 KiB
Python

"""Regression tests for _rewrite_compound_background.
Context: bash parses ``A && B &`` as ``(A && B) &`` — it forks a subshell
for the compound and backgrounds the subshell. Inside the subshell, B
runs foreground, so the subshell waits for B. When B never exits on its
own (HTTP servers, ``yes > /dev/null``, etc.), the subshell is stuck in
``wait4`` forever and leaks as an orphan process. Pre-fix, we saw this
pattern leak processes across the fleet (vela, sal, combiagent).
The rewriter fixes this by wrapping the tail in a brace group —
``A && { B & }`` — so B runs as a simple backgrounded command inside
the current shell. No subshell fork, no wait.
"""
from tools.terminal_tool import _rewrite_compound_background as rewrite
class TestRewrites:
"""Commands that trigger the subshell-wait bug MUST be rewritten."""
def test_simple_and_background(self):
assert rewrite("A && B &") == "A && { B & }"
def test_or_background(self):
assert rewrite("A || B &") == "A || { B & }"
def test_multiple_rewrites_in_one_script(self):
cmd = "A && B &\nfalse || C &"
assert rewrite(cmd) == "A && { B & }\nfalse || { C & }"
class TestPreserved:
"""Commands that DON'T have the bug MUST pass through unchanged."""
def test_simple_background(self):
# No compound — just background a single command. Works fine as-is.
assert rewrite("sleep 5 &") == "sleep 5 &"
def test_plain_server_background(self):
assert rewrite("python3 -m http.server 0 &") == "python3 -m http.server 0 &"
def test_whitespace_only(self):
assert rewrite(" \n\t") == " \n\t"
class TestRedirectsNotConfused:
"""``&>``, ``2>&1``, ``>&2`` must not be mistaken for background ``&``."""
def test_amp_gt_redirect_alone(self):
assert rewrite("echo hi &>/dev/null") == "echo hi &>/dev/null"
def test_gt_amp_inside_compound(self):
cmd = "A && B 2>&1 &"
assert rewrite(cmd) == "A && { B 2>&1 & }"
class TestQuotingAndParens:
"""Shell metacharacters inside quotes/parens must not be parsed as operators."""
def test_and_and_inside_single_quotes(self):
cmd = "echo 'A && B &'"
assert rewrite(cmd) == "echo 'A && B &'"
def test_backslash_escaped_ampersand(self):
# Escaped & is not a background operator.
cmd = r"echo A \&\& B"
assert rewrite(cmd) == cmd
def test_comment_line_not_rewritten(self):
cmd = "# A && B &\nC"
assert rewrite(cmd) == "# A && B &\nC"
class TestIdempotence:
"""Running the rewriter twice should be a no-op on its own output."""
def test_already_rewritten(self):
once = rewrite("A && B &")
twice = rewrite(once)
assert once == twice
assert twice == "A && { B & }"
def test_multiline_idempotent(self):
once = rewrite("cd /tmp && server &\nsleep 1")
assert rewrite(once) == once
class TestEdgeCases:
def test_only_chain_op_no_second_command(self):
# Malformed input: bash would error, we shouldn't crash or rewrite.
cmd = "A && &"
# Don't assert a specific output; just don't raise.
rewrite(cmd)
def test_tabs_between_tokens(self):
assert rewrite("A\t&&\tB\t&") == "A\t&&\t{ B\t& }"