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MeshTerm/tests/test_message_paths_screen.py
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Jean-Pierre MartineauandClaude Fable 5 94aba0cbcd Message paths: a path graph over selectable, sideways-scrolling rows
The ^P view grows from a static scroll window into its own dialog. Up
top, every distinct path the message took drawn in the atlas's edge
style — origin left, us right, the final relay → us link coloured by
that path's reception SNR, earlier links slate — with markers for every
node but labels only along the currently selected path, so a many-path
graph stays readable; the selected path draws bright, the rest dim.
Beneath, one row per arrival with a selection cursor: ↑↓ move it (the
graph follows), and a row longer than the dialog scrolls horizontally
with ←→ — the whole line shifts under an edge …, and snaps back the
moment the selection moves on. crop_cells in tui.render is the new
cell-exact window primitive behind that.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-12 15:47:56 -04:00

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"""Message-paths dialog tests: the graph-over-rows view behind the chat's ^P.
Driven headless like the atlas tests: render_body is pure lines-out, handle() pure
state, so the selection cursor, the horizontal line scroll, and the selected-path
labelling are all assertable without a terminal.
"""
from __future__ import annotations
import re
from datetime import timedelta
from meshterm.core.models import ChatMessage, utcnow
from meshterm.services.message_paths import Arrival
from meshterm.ui.message_paths_screen import MessagePathsScreen
def _resolve(hop: str) -> str:
return {"3d63": "YUL-Cartierville", "a1b2": "Waymarker"}.get(hop, hop)
def _plain(lines: list[str]) -> str:
return re.sub(r"\x1b\[[0-9;]*m", "", "\n".join(lines))
def _screen(arrivals: list[Arrival], **kwargs) -> MessagePathsScreen:
message = ChatMessage(text="on my way", is_channel=True, created_at=utcnow())
defaults = dict(
matched=True, resolve=_resolve, prefix_bytes=1, self_name="Homestead",
summary="heard twice", source="Alice",
)
defaults.update(kwargs)
return MessagePathsScreen(message, arrivals, **defaults)
def _arrivals() -> list[Arrival]:
now = utcnow()
return [
Arrival(when=now, hops=("3d63",), snr=4.0),
Arrival(when=now + timedelta(seconds=2), hops=("a1b2", "77aa"), snr=-2.0),
]
def test_paths_screen_renders_graph_rows_and_cursor() -> None:
"""The quoted text, the graph endpoints, and one selectable row per arrival."""
screen = _screen(_arrivals())
body = _plain(screen.render_body(76))
assert "“on my way”" in body
assert "Alice" in body and "Homestead" in body # origin and us, on the graph
assert body.count("via") == 2 # one row per arrival
assert "❯" in body
assert "bright = selected path" in body
assert screen.cursor_line() is not None
def test_paths_screen_labels_only_the_selected_path() -> None:
"""Relay labels follow the selection: the other path keeps bare markers."""
screen = _screen(_arrivals())
graph = _plain(screen.render_body(76)).split("origin →")[0]
assert "YUL-Cartier" in graph # the selected (first) path's relay is named
assert "Waymarker" not in graph # the other path's relays stay unlabelled
screen.handle("down")
graph = _plain(screen.render_body(76)).split("origin →")[0]
assert "Waymarker" in graph
assert "YUL-Cartier" not in graph
def test_paths_screen_scrolls_the_selected_line_sideways() -> None:
"""→ shifts the whole selected row under a leading …; ↑↓ snap it back."""
now = utcnow()
long = Arrival(when=now, hops=tuple(f"{i:02x}{i:02x}" for i in range(12)), snr=1.0)
screen = _screen([long, Arrival(when=now, hops=(), snr=None)])
narrow = 40
before = _plain(screen.render_body(narrow))
selected_before = next(ln for ln in before.split("\n") if ln.startswith("❯"))
assert screen._hmax > 0 # the row genuinely overflows at this width
for _ in range(3):
screen.handle("right")
after = _plain(screen.render_body(narrow))
selected_after = next(ln for ln in after.split("\n") if ln.startswith("❯"))
assert selected_after != selected_before
assert "…" in selected_after # the left edge marks the hidden head
stamp = long.when.astimezone().strftime("%H:%M:%S")
assert stamp in selected_before and stamp not in selected_after # whole line shifts
screen.handle("down")
assert screen._hshift == 0 # only the selected line stays scrolled
def test_paths_screen_direct_arrival_and_empty_state() -> None:
"""A hop-less arrival reads direct; no arrivals at all explain themselves."""
now = utcnow()
screen = _screen([Arrival(when=now, hops=(), snr=2.5)])
body = _plain(screen.render_body(76))
assert "direct" in body
empty = _screen([], matched=False)
body = _plain(empty.render_body(76))
assert "No direct-message frames logged in the window." in body
assert empty.footer_hint == "Esc close"