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https://github.com/zvx-echo6/meshai.git
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refactor(sizing): fixed universal mesh budget (mesh_max_chars=140)
Replace per-transport / min-of-active max_chars with a single fixed universal constant (mesh_max_chars, default 140 = MeshCore LCD). Every message is built once against one deterministic budget regardless of which radios are connected; no runtime variance, no per-transport retooling. Meshtastic sizing intentionally moves 200 -> 140. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Matt Johnson
parent
a2428e6a03
commit
82f1f95988
12 changed files with 135 additions and 71 deletions
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@ -413,7 +413,7 @@ REGISTRY: dict[tuple[str, str], dict[str, Any]] = {
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# digest_max_chars: mesh wire cap. The LLM is told to fit under this.
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# Reuses the response.max_length chunking if the LLM ignores the cap.
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("fires", "digest_max_chars"): {
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"default": 200,
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"default": 140,
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"type": "int",
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"description": "Hard cap on the digest wire string length (chars). The LLM prompt asks to fit; the chunker enforces.",
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},
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@ -36,12 +36,12 @@ class ConnectionConfig:
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reconnect_health_interval: float = 30.0
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# --- transport selection (Phase 1 seam; MeshCore support is Phase 2) ---
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transport: str = "meshtastic" # "meshtastic" | "meshcore" | "both"
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meshtastic_max_chars: int = 200 # default Meshtastic packet budget
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# Universal mesh message budget (MeshCore LCD → 140 for all transports).
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mesh_max_chars: int = 140
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# --- MeshCore transport settings (used when transport="meshcore") ---
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meshcore_host: str = "100.64.0.9" # pyMC companion frame server host
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meshcore_port: int = 5050 # pyMC companion frame server port
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meshcore_channel_index: int = 0 # default channel index for broadcasts
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meshcore_max_chars: int = 140 # placeholder max chars (Phase 3 chunker)
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meshcore_auto_reconnect: bool = True # enable meshcore lib auto-reconnect
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meshcore_max_reconnect_attempts: int = 5 # max reconnect attempts (0 = unlimited)
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@ -77,7 +77,7 @@ class MeshtasticTransport(MeshTransport):
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@property
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def max_chars(self) -> int:
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return getattr(self.config, "meshtastic_max_chars", 200)
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return self.config.mesh_max_chars
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def connect(self) -> None:
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"""Establish connection to Meshtastic node."""
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@ -74,7 +74,7 @@ def build_pipeline(config, llm_backend, connector=None) -> EventBus:
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accumulator = DigestAccumulator(
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llm_backend=llm_backend,
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include_toggles=include_toggles,
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mesh_char_limit=connector.max_chars if connector is not None else 200,
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mesh_char_limit=connector.max_chars if connector is not None else 140,
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)
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# Tee closure: events go to BOTH dispatcher and accumulator
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@ -112,7 +112,8 @@ async def render_digest(*, now: Optional[int] = None) -> tuple[str, str]:
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else:
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fire_lines.append(name)
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# Assemble within ~200-byte LoRa budget; trim fire lines, never the tail
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# Assemble within the universal mesh budget; trim fire lines, never the tail
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budget = int(adapter_config.fires.digest_max_chars)
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shown: list[str] = []
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for line in fire_lines:
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# Estimate tail for budget check
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@ -127,7 +128,7 @@ async def render_digest(*, now: Optional[int] = None) -> tuple[str, str]:
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if est_tail:
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parts.append(est_tail)
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candidate = "\n".join(parts)
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if len(candidate.encode("utf-8")) <= 200:
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if len(candidate.encode("utf-8")) <= budget:
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shown.append(line)
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else:
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break
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@ -51,10 +51,11 @@ class CompositeTransport(MeshTransport):
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filtering is per-child in the inbound wrapper).
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"""
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def __init__(self, children: List[MeshTransport]) -> None:
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def __init__(self, children: List[MeshTransport], config=None) -> None:
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if not children:
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raise ValueError("CompositeTransport requires at least one child")
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self._children = list(children)
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self._config = config # ConnectionConfig; used for the universal mesh_max_chars budget
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# Build a stable name → child mapping for O(1) routing-hint lookup.
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self._by_name: dict[str, MeshTransport] = {
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_child_name(c): c for c in self._children
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@ -173,16 +174,17 @@ class CompositeTransport(MeshTransport):
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@property
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def max_chars(self) -> int:
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"""Return the minimum max_chars across all children.
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"""Return the universal mesh message budget from config.
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The tightest budget (MeshCore 140) governs so broadcasts — which
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fan out to all children — always fit every mesh.
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Sourced directly from ``config.mesh_max_chars`` (default 140) — the
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single fixed constant that governs all transports regardless of which
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radios are connected. MeshCore is the LCD, so 140 is the right value
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for every path.
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"""
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connected = [c for c in self._children if c.connected]
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if connected:
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return min(c.max_chars for c in connected)
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# Fallback to overall minimum if no child is connected yet.
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return min(c.max_chars for c in self._children)
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if self._config is not None:
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return self._config.mesh_max_chars
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# Fallback for tests that build CompositeTransport without a config.
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return 140
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# ------------------------------------------------------------------
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# Message I/O
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@ -39,7 +39,7 @@ def build_transport(config) -> MeshTransport:
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return CompositeTransport([
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MeshtasticTransport(config),
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MeshCoreTransport(config),
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])
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], config=config)
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raise ValueError(
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f"Unknown transport {transport_name!r}. "
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@ -199,7 +199,7 @@ class MeshCoreTransport(MeshTransport):
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Args:
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text: Message text (caller is responsible for length limits; see
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``meshcore_max_chars`` config field for the future chunker).
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``mesh_max_chars`` config field).
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destination: hex pubkey string for a DM, or None for channel send.
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channel: Channel index for channel sends (0 = default).
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transport: Optional routing hint (for CompositeTransport); ignored here.
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@ -369,7 +369,7 @@ class MeshCoreTransport(MeshTransport):
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@property
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def max_chars(self) -> int:
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return getattr(self.config, "meshcore_max_chars", 140)
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return self.config.mesh_max_chars
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def get_node_name(self, node_id: str) -> str:
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"""Resolve a pubkey prefix to a contact display name, or return node_id."""
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@ -132,17 +132,30 @@ class TestFactory:
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# ---------------------------------------------------------------------------
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class TestMaxChars:
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def test_min_of_children(self) -> None:
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"""max_chars == min(child.max_chars) — MeshCore 140 wins over MT 200."""
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def test_fixed_universal_budget_no_config(self) -> None:
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"""Without a config, CompositeTransport falls back to the 140 constant."""
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mt = FakeChild("meshtastic", max_chars_val=200)
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mc = FakeChild("meshcore", max_chars_val=140)
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comp = CompositeTransport([mt, mc])
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assert comp.max_chars == 140
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def test_single_child(self) -> None:
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def test_fixed_universal_budget_from_config(self) -> None:
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"""With a config, CompositeTransport reads mesh_max_chars directly."""
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from meshai.config import ConnectionConfig
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cfg = ConnectionConfig(transport="both", mesh_max_chars=140)
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mt = FakeChild("meshtastic", max_chars_val=200)
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mc = FakeChild("meshcore", max_chars_val=140)
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comp = CompositeTransport([mt, mc], config=cfg)
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assert comp.max_chars == 140
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def test_fixed_universal_budget_ignores_child_values(self) -> None:
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"""CompositeTransport must NOT take min(children); it sources config."""
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from meshai.config import ConnectionConfig
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cfg = ConnectionConfig(transport="both", mesh_max_chars=140)
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# Even if a child would report 230, the composite must return 140.
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child = FakeChild("meshtastic", max_chars_val=230)
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comp = CompositeTransport([child])
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assert comp.max_chars == 230
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comp = CompositeTransport([child], config=cfg)
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assert comp.max_chars == 140
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# ---------------------------------------------------------------------------
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@ -2,7 +2,7 @@
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Validates recency ordering, contained/tombstoned exclusion, the
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"Name in County Co, ST" line format, correct tail count after budget
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trimming, singular/plural grammar, and the 200-byte LoRa budget.
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trimming, singular/plural grammar, and the 140-byte universal mesh budget.
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"""
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from __future__ import annotations
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@ -62,28 +62,34 @@ class TestFireDigestRecency:
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"""Deterministic fire digest renderer tests."""
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def test_top_2_listed_in_recency_order(self):
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"""The 2 most recent active fires are listed in order."""
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"""The most recent active fire is listed first.
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With the universal 140-byte budget, the header + 1 fire line + tail
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fits; the second fire line does not. Alpha (most recent) must appear;
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Bravo belongs to the tail count.
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"""
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conn = get_db()
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now = int(time.time())
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_seed_scenario(conn)
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from meshai.notifications.scheduled.fire_digest import render_digest
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wire, source = asyncio.run(render_digest(now=now))
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assert source == "deterministic"
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# Most recent fire must appear in the wire body.
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assert "Alpha Fire" in wire
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assert "Bravo Fire" in wire
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pos_alpha = wire.index("Alpha Fire")
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pos_bravo = wire.index("Bravo Fire")
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assert pos_alpha < pos_bravo, "Alpha Fire (most recent) should appear before Bravo Fire"
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# Bravo does not fit within 140 bytes alongside the header + tail.
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assert "Bravo Fire" not in wire
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def test_line_format_name_in_county_co_state(self):
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"""Fire lines render as 'Name in County Co, ST'."""
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"""Fire lines render as 'Name in County Co, ST'.
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Only the most recent fire fits within the 140-byte budget.
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"""
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conn = get_db()
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now = int(time.time())
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_seed_scenario(conn)
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from meshai.notifications.scheduled.fire_digest import render_digest
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wire, _ = asyncio.run(render_digest(now=now))
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assert "Alpha Fire in Ada Co, ID" in wire
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assert "Bravo Fire in Boise Co, ID" in wire
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def test_missing_county_renders_name_in_state(self):
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"""Fire with no county renders as 'Name in ST'."""
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@ -123,17 +129,25 @@ class TestFireDigestRecency:
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"""N == 1 renders 'There is 1 additional wildfire.'."""
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conn = get_db()
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now = int(time.time())
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_seed_scenario(conn)
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# 3 fires; short names + no county → lines are short enough that
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# 2 fit within the 140-byte budget, leaving 1 in the tail.
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for irwin, name, offset in [
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("SG-01", "A", 3600),
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("SG-02", "B", 7200),
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("SG-03", "C", 10800),
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]:
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_seed_fire(conn, irwin_id=irwin, name=name, acres=100,
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contained=None, last_event_at=now - offset,
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county=None, state="ID")
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from meshai.notifications.scheduled.fire_digest import render_digest
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wire, _ = asyncio.run(render_digest(now=now))
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# 3 active total, 2 shown, 1 remaining
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# 3 active total, 2 shown (budget), 1 remaining
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assert "There is 1 additional wildfire. DM me for the full list." in wire
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def test_n_plural_grammar(self):
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"""N > 1 renders 'There are N additional wildfires.'."""
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conn = get_db()
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now = int(time.time())
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day = 86400
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for i in range(4):
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_seed_fire(conn, irwin_id=f"PL-{i:02d}", name=f"Fire {i}",
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acres=100 + i, contained=None,
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@ -141,8 +155,9 @@ class TestFireDigestRecency:
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county="Ada", state="ID")
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from meshai.notifications.scheduled.fire_digest import render_digest
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wire, _ = asyncio.run(render_digest(now=now))
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# 4 active, 2 shown, 2 remaining
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assert "There are 2 additional wildfires. DM me for the full list." in wire
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# 4 active; "Fire N in Ada Co, ID" lines total ~142 bytes for 2 lines +
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# header + tail → only 1 line fits in the 140-byte budget → 3 remaining.
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assert "There are 3 additional wildfires. DM me for the full list." in wire
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def test_n_zero_omits_sentence(self):
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"""When N == 0, the tail sentence is omitted entirely."""
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@ -186,7 +201,7 @@ class TestFireDigestRecency:
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wire, source = asyncio.run(render_digest(now=now))
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assert source == "deterministic"
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byte_len = len(wire.encode("utf-8"))
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assert byte_len <= 200, f"Wire is {byte_len} bytes, exceeds 200"
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assert byte_len <= 140, f"Wire is {byte_len} bytes, exceeds 140"
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# If both long lines fit, remaining = 1; if only one fits, remaining = 2
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# Either way the tail count must match (total - shown)
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lines = wire.split("\n")
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@ -205,7 +220,7 @@ class TestFireDigestRecency:
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from meshai.notifications.scheduled.fire_digest import render_digest
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wire, _ = asyncio.run(render_digest(now=now))
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byte_len = len(wire.encode("utf-8"))
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assert byte_len <= 200, f"Digest is {byte_len} bytes, exceeds 200-byte budget"
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assert byte_len <= 140, f"Digest is {byte_len} bytes, exceeds 140-byte budget"
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def test_no_fires_returns_empty(self):
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"""No active fires -> empty wire, 'no_fires' source."""
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@ -76,7 +76,7 @@ def test_adapter_config_seeds_digest_keys():
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assert rows[("fires", "digest_enabled")] == "true"
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assert rows[("fires", "digest_schedule")] == '["06:00", "18:00"]'
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assert rows[("fires", "digest_timezone")] == '"America/Boise"'
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assert rows[("fires", "digest_max_chars")] == "200"
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assert rows[("fires", "digest_max_chars")] == "140"
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# ===========================================================================
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@ -107,7 +107,7 @@ def test_render_digest_terse_fallback_when_no_llm():
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assert source == "deterministic"
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assert wire
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assert "Cache Peak" in wire
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assert len(wire) <= 200
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assert len(wire) <= 140
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def test_render_digest_uses_llm_when_available():
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@ -1,8 +1,8 @@
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"""Tests for Phase 3 uniform mesh-packet sizing.
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"""Tests for uniform mesh-packet sizing.
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Verifies that every size-sensitive code path uses the active transport's
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max_chars rather than a hardcoded 200. Meshtastic default stays 200
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(byte-identical); MeshCore uses 140.
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Verifies that every size-sensitive code path uses the single universal
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mesh_max_chars constant (140 = MeshCore LCD). All transports — Meshtastic,
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MeshCore, and the composite — report the same fixed value.
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"""
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import sys
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@ -127,59 +127,90 @@ def _minimal_config():
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# ---------------------------------------------------------------------------
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class TestTransportMaxChars:
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def test_meshtastic_default_is_200(self):
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def test_meshtastic_default_is_140(self):
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"""Meshtastic now uses the universal mesh_max_chars constant (140)."""
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cfg = _mt_config()
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t = MeshtasticTransport(cfg)
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assert t.max_chars == 200
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def test_meshtastic_respects_config_field(self):
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cfg = _mt_config(meshtastic_max_chars=160)
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t = MeshtasticTransport(cfg)
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assert t.max_chars == 160
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assert t.max_chars == 140
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def test_meshcore_default_is_140(self):
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cfg = _mc_config()
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t = MeshCoreTransport(cfg)
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assert t.max_chars == 140
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def test_meshcore_respects_config_field(self):
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cfg = _mc_config(meshcore_max_chars=120)
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t = MeshCoreTransport(cfg)
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assert t.max_chars == 120
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def test_build_transport_meshtastic_max_chars(self):
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"""build_transport(meshtastic) → 140 (universal constant)."""
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t = build_transport(_mt_config())
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assert t.max_chars == 200
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assert t.max_chars == 140
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def test_build_transport_meshcore_max_chars(self):
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t = build_transport(_mc_config())
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assert t.max_chars == 140
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def test_mesh_max_chars_config_field_governs_all(self):
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"""A non-default mesh_max_chars propagates to both transport types."""
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cfg_mt = _mt_config(mesh_max_chars=120)
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assert MeshtasticTransport(cfg_mt).max_chars == 120
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cfg_mc = _mc_config(mesh_max_chars=120)
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assert MeshCoreTransport(cfg_mc).max_chars == 120
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def test_all_three_transports_and_composite_report_140(self):
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"""Sanity: all transports + CompositeTransport report mesh_max_chars=140.
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This is the canonical single-budget guarantee: Meshtastic, MeshCore,
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and the composite (transport=both) all resolve to the same constant.
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"""
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from meshai.config import ConnectionConfig
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from meshai.transport.composite_transport import CompositeTransport
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# Meshtastic
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assert MeshtasticTransport(_mt_config()).max_chars == 140
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# MeshCore
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assert MeshCoreTransport(_mc_config()).max_chars == 140
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# Composite (built via factory with transport="both")
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cfg_both = ConnectionConfig(
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transport="both",
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type="tcp",
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tcp_host="127.0.0.1",
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tcp_port=4403,
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meshcore_host="127.0.0.1",
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meshcore_port=5050,
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meshcore_channel_index=0,
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)
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comp = build_transport(cfg_both)
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assert isinstance(comp, CompositeTransport)
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assert comp.max_chars == 140
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# ---------------------------------------------------------------------------
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# 2. MeshRenderer char_limit propagation via channels
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# ---------------------------------------------------------------------------
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class TestChannelRendererBudget:
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def test_broadcast_channel_with_meshcore_connector_uses_140(self):
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def test_broadcast_channel_propagates_connector_max_chars(self):
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"""Channel renderer inherits max_chars from whatever the connector reports."""
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conn = _fake_connector(140)
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ch = MeshBroadcastChannel(connector=conn, channel_index=0)
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assert ch._renderer._limit == 140
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def test_broadcast_channel_with_meshtastic_connector_uses_200(self):
|
||||
conn = _fake_connector(200)
|
||||
def test_broadcast_channel_with_meshtastic_connector_uses_140(self):
|
||||
"""After the universal budget refactor, a meshtastic connector reports 140."""
|
||||
conn = _fake_connector(140)
|
||||
ch = MeshBroadcastChannel(connector=conn, channel_index=0)
|
||||
assert ch._renderer._limit == 200
|
||||
assert ch._renderer._limit == 140
|
||||
|
||||
def test_dm_channel_with_meshcore_connector_uses_140(self):
|
||||
def test_dm_channel_propagates_connector_max_chars(self):
|
||||
conn = _fake_connector(140)
|
||||
ch = MeshDMChannel(connector=conn, node_ids=["!aabbccdd"])
|
||||
assert ch._renderer._limit == 140
|
||||
|
||||
def test_dm_channel_with_meshtastic_connector_uses_200(self):
|
||||
conn = _fake_connector(200)
|
||||
def test_dm_channel_with_meshtastic_connector_uses_140(self):
|
||||
conn = _fake_connector(140)
|
||||
ch = MeshDMChannel(connector=conn, node_ids=["!aabbccdd"])
|
||||
assert ch._renderer._limit == 200
|
||||
assert ch._renderer._limit == 140
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
|
|
@ -187,11 +218,12 @@ class TestChannelRendererBudget:
|
|||
# ---------------------------------------------------------------------------
|
||||
|
||||
class TestBuildPipelineMeshCharLimit:
|
||||
def test_no_connector_uses_200(self):
|
||||
def test_no_connector_uses_140(self):
|
||||
"""Without a connector the pipeline falls back to the universal constant (140)."""
|
||||
cfg = _minimal_config()
|
||||
bus = build_pipeline(cfg, llm_backend=None, connector=None)
|
||||
acc = bus._pipeline_components["accumulator"]
|
||||
assert acc._mesh_char_limit == 200
|
||||
assert acc._mesh_char_limit == 140
|
||||
|
||||
def test_meshcore_connector_uses_140(self):
|
||||
cfg = _minimal_config()
|
||||
|
|
@ -200,12 +232,13 @@ class TestBuildPipelineMeshCharLimit:
|
|||
acc = bus._pipeline_components["accumulator"]
|
||||
assert acc._mesh_char_limit == 140
|
||||
|
||||
def test_meshtastic_connector_uses_200(self):
|
||||
def test_meshtastic_connector_uses_140(self):
|
||||
"""After universal budget, a meshtastic connector also reports 140."""
|
||||
cfg = _minimal_config()
|
||||
conn = _fake_connector(200)
|
||||
conn = _fake_connector(140)
|
||||
bus = build_pipeline(cfg, llm_backend=None, connector=conn)
|
||||
acc = bus._pipeline_components["accumulator"]
|
||||
assert acc._mesh_char_limit == 200
|
||||
assert acc._mesh_char_limit == 140
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue