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Assigning a new filament to the external spool (e.g. generic ABS over generic TPU) left the previous inventory spool assigned. The reconciliation that unlinks a stale external-spool assignment lives in on_ams_change, but that callback only fired on regular AMS-unit changes: its change-hash never included the external spool (vt_tray/vir_slot), and the external-spool data is stored after the AMS handler runs. Detect external-spool identity changes (type, colour, tag, or reset to empty) and re-fire on_ams_change so the stale assignment is unlinked. The fill percentage (remain) is excluded from the fingerprint so a running print doesn't trigger it on every push.
93 lines
3.7 KiB
Python
93 lines
3.7 KiB
Python
"""External-spool (vt_tray) change detection (#2575).
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The AMS change-hash in ``_handle_ams_data`` is built only from AMS units, so a
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filament swap on the external spool alone (e.g. generic TPU -> generic ABS on
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the printer) used to never re-trigger ``on_ams_change``. That left a stale
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inventory assignment on the ``ams_id=255`` slot: Bambuddy kept showing the old
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filament after the physical type had changed.
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These tests drive full MQTT messages through ``_process_message`` and assert the
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callback fires exactly when the external spool's *identity* changes — and not on
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every push (e.g. a steadily-dropping ``remain`` percentage during a print).
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"""
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import pytest
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from backend.app.services.bambu_mqtt import BambuMQTTClient
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def _ext_spool_msg(tray_type: str, remain: int = 100, color: str = "000000FF"):
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"""A realistic print message carrying only external-spool (vt_tray) data."""
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return {
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"print": {
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"vt_tray": {
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"id": "254",
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"tray_type": tray_type,
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"tray_color": color,
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"tray_info_idx": "",
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"tag_uid": "0000000000000000",
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"tray_uuid": "00000000000000000000000000000000",
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"remain": remain,
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}
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}
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}
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class TestExternalSpoolChangeDetection:
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@pytest.fixture
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def mqtt_client(self):
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return BambuMQTTClient(
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ip_address="192.168.1.100",
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serial_number="TEST123",
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access_code="12345678",
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)
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def test_type_swap_fires_callback(self, mqtt_client):
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"""Swapping the external filament type re-triggers the sync callback."""
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calls: list = []
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mqtt_client.on_ams_change = lambda ams_data: calls.append(ams_data)
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# First observation of the external spool (TPU) — fires once.
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mqtt_client._process_message(_ext_spool_msg("TPU"))
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assert len(calls) == 1
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# Physical filament changed to ABS — must fire again so the stale
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# ams_id=255 assignment gets reconciled.
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mqtt_client._process_message(_ext_spool_msg("ABS"))
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assert len(calls) == 2
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# The callback receives the merged AMS list (never None).
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assert all(isinstance(c, list) for c in calls)
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def test_identical_push_does_not_refire(self, mqtt_client):
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"""Repeated identical vt_tray pushes fire the callback only once."""
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calls: list = []
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mqtt_client.on_ams_change = lambda ams_data: calls.append(ams_data)
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mqtt_client._process_message(_ext_spool_msg("ABS"))
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mqtt_client._process_message(_ext_spool_msg("ABS"))
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mqtt_client._process_message(_ext_spool_msg("ABS"))
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assert len(calls) == 1
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def test_remain_only_change_does_not_refire(self, mqtt_client):
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"""A dropping fill percentage must not spam the reconciliation callback."""
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calls: list = []
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mqtt_client.on_ams_change = lambda ams_data: calls.append(ams_data)
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mqtt_client._process_message(_ext_spool_msg("PLA", remain=100))
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assert len(calls) == 1
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# remain drops during a print — identity unchanged, no refire.
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mqtt_client._process_message(_ext_spool_msg("PLA", remain=87))
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mqtt_client._process_message(_ext_spool_msg("PLA", remain=42))
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assert len(calls) == 1
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def test_reset_to_empty_fires_callback(self, mqtt_client):
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"""Resetting the external spool (empty tray_type) is an identity change."""
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calls: list = []
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mqtt_client.on_ams_change = lambda ams_data: calls.append(ams_data)
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mqtt_client._process_message(_ext_spool_msg("TPU"))
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assert len(calls) == 1
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mqtt_client._process_message(_ext_spool_msg("")) # reset / unloaded
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assert len(calls) == 2
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