hermes-agent/tests/cli/test_cli_background_status_indicator.py
Teknium 1c3c364287
feat(cli): show live background terminal-process count in status bar (#32061)
The CLI status bar tracked /background agent tasks (▶ N) but not shell
processes spawned via terminal(background=true). Both kinds of work can
run concurrently and a user has no in-bar signal for shell processes.

Add an independent indicator (⚙ N) sourced from
tools.process_registry.process_registry._running. The two indicators
render side-by-side when both are active (▶ 1 │ ⚙ 2), hidden when their
count is zero. Renders at all four status-bar tiers (text fallback +
prompt_toolkit fragments, narrow + wide widths). The narrow <52 tier
still drops both for space — unchanged.

New ProcessRegistry.count_running() returns len(_running) without
acquiring _lock; CPython dict len is atomic and we're polling on every
status-bar tick, so lock-free is the right tradeoff.
2026-05-25 05:35:02 -07:00

191 lines
6.7 KiB
Python

"""Tests for the /background indicator in the CLI status bar.
The classic prompt_toolkit status bar shows `▶ N` when N tasks launched via
`/background` are still running. Source of truth is `self._background_tasks`
(a Dict[str, threading.Thread]); entries are removed in the task thread's
finally block, so len() reflects truly-running tasks.
"""
import threading
from datetime import datetime
from cli import HermesCLI
def _stub_thread() -> threading.Thread:
"""Return a Thread instance that's never started — pure dict-value stand-in."""
return threading.Thread(target=lambda: None)
def _make_cli():
"""Bare-metal HermesCLI for snapshot/build tests (no __init__ side effects)."""
cli_obj = HermesCLI.__new__(HermesCLI)
cli_obj.model = "anthropic/claude-opus-4.6"
cli_obj.agent = None
cli_obj._background_tasks = {}
# The snapshot reads session_start to compute duration; supply a stub.
cli_obj.session_start = datetime.now()
return cli_obj
def test_snapshot_reports_zero_when_no_background_tasks():
cli_obj = _make_cli()
snap = cli_obj._get_status_bar_snapshot()
assert snap["active_background_tasks"] == 0
def test_snapshot_counts_live_background_tasks():
cli_obj = _make_cli()
cli_obj._background_tasks = {"bg_a": _stub_thread(), "bg_b": _stub_thread()}
snap = cli_obj._get_status_bar_snapshot()
assert snap["active_background_tasks"] == 2
def test_snapshot_safe_when_background_tasks_attr_missing():
"""Older HermesCLI instances (tests with __new__, etc.) may lack the attr."""
cli_obj = HermesCLI.__new__(HermesCLI)
cli_obj.model = "x"
cli_obj.agent = None
cli_obj.session_start = datetime.now()
# No _background_tasks at all — must not raise.
snap = cli_obj._get_status_bar_snapshot()
assert snap["active_background_tasks"] == 0
def test_plain_text_status_omits_indicator_when_idle():
cli_obj = _make_cli()
text = cli_obj._build_status_bar_text(width=80)
assert "" not in text
def test_plain_text_status_shows_indicator_when_active():
cli_obj = _make_cli()
cli_obj._background_tasks = {"bg_a": _stub_thread()}
text = cli_obj._build_status_bar_text(width=80)
assert "▶ 1" in text
def test_plain_text_status_shows_higher_count():
cli_obj = _make_cli()
cli_obj._background_tasks = {
"a": _stub_thread(),
"b": _stub_thread(),
"c": _stub_thread(),
}
text = cli_obj._build_status_bar_text(width=80)
assert "▶ 3" in text
def test_narrow_width_omits_bg_indicator():
"""The narrow tier (<52) is already cramped — bg is secondary, drop it."""
cli_obj = _make_cli()
cli_obj._background_tasks = {"bg_a": _stub_thread()}
text = cli_obj._build_status_bar_text(width=40)
assert "" not in text
def test_fragments_include_bg_segment_when_active():
cli_obj = _make_cli()
cli_obj._background_tasks = {"a": _stub_thread(), "b": _stub_thread()}
cli_obj._status_bar_visible = True
# _get_status_bar_fragments asks _get_tui_terminal_width(); stub it wide.
cli_obj._get_tui_terminal_width = lambda: 120 # type: ignore[method-assign]
frags = cli_obj._get_status_bar_fragments()
rendered = "".join(text for _style, text in frags)
assert "▶ 2" in rendered
def test_fragments_omit_bg_segment_when_idle():
cli_obj = _make_cli()
cli_obj._status_bar_visible = True
cli_obj._get_tui_terminal_width = lambda: 120 # type: ignore[method-assign]
frags = cli_obj._get_status_bar_fragments()
rendered = "".join(text for _style, text in frags)
assert "" not in rendered
# ── Background terminal-process indicator (⚙ N) ───────────────────────────
# Source of truth is tools.process_registry.process_registry._running (a dict
# of currently-running shell processes spawned by terminal(background=true)).
# Distinct from /background tasks above: ▶ counts agent threads, ⚙ counts
# shell processes. Both can be active simultaneously.
class _FakeRunningRegistry:
"""Minimal stand-in for process_registry; exposes count_running()."""
def __init__(self, count: int) -> None:
self._count = count
def count_running(self) -> int:
return self._count
def _patch_process_registry(monkeypatch, count: int) -> None:
import tools.process_registry as pr_mod
monkeypatch.setattr(pr_mod, "process_registry", _FakeRunningRegistry(count))
def test_snapshot_reports_zero_when_no_background_processes(monkeypatch):
cli_obj = _make_cli()
_patch_process_registry(monkeypatch, 0)
snap = cli_obj._get_status_bar_snapshot()
assert snap["active_background_processes"] == 0
def test_snapshot_counts_live_background_processes(monkeypatch):
cli_obj = _make_cli()
_patch_process_registry(monkeypatch, 3)
snap = cli_obj._get_status_bar_snapshot()
assert snap["active_background_processes"] == 3
def test_snapshot_safe_when_process_registry_raises(monkeypatch):
"""If count_running() raises the snapshot stays at 0; no propagate."""
cli_obj = _make_cli()
import tools.process_registry as pr_mod
class _BoomRegistry:
def count_running(self):
raise RuntimeError("boom")
monkeypatch.setattr(pr_mod, "process_registry", _BoomRegistry())
snap = cli_obj._get_status_bar_snapshot()
assert snap["active_background_processes"] == 0
def test_plain_text_status_shows_proc_indicator_when_active(monkeypatch):
cli_obj = _make_cli()
_patch_process_registry(monkeypatch, 2)
text = cli_obj._build_status_bar_text(width=80)
assert "⚙ 2" in text
def test_plain_text_status_omits_proc_indicator_when_idle(monkeypatch):
cli_obj = _make_cli()
_patch_process_registry(monkeypatch, 0)
text = cli_obj._build_status_bar_text(width=80)
assert "" not in text
def test_fragments_include_proc_segment_when_active(monkeypatch):
cli_obj = _make_cli()
_patch_process_registry(monkeypatch, 1)
cli_obj._status_bar_visible = True
cli_obj._get_tui_terminal_width = lambda: 120 # type: ignore[method-assign]
frags = cli_obj._get_status_bar_fragments()
rendered = "".join(text for _style, text in frags)
assert "⚙ 1" in rendered
def test_indicators_independent_agents_and_processes(monkeypatch):
"""▶ (agent tasks) and ⚙ (shell processes) render side-by-side."""
cli_obj = _make_cli()
cli_obj._background_tasks = {"bg_a": _stub_thread()}
_patch_process_registry(monkeypatch, 2)
cli_obj._status_bar_visible = True
cli_obj._get_tui_terminal_width = lambda: 120 # type: ignore[method-assign]
frags = cli_obj._get_status_bar_fragments()
rendered = "".join(text for _style, text in frags)
assert "▶ 1" in rendered
assert "⚙ 2" in rendered