Tech Tools section with a code generator, toner report that names the part, toner forecasting, warranty proof of cover, application uploads

tests/test_plugins/test_supply_history.py

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+"""Tests for toner burn-rate and replacement counting.
+
+The analysis is pure arithmetic over a list of readings, so it is tested that
+way - no Zabbix, no fixtures. What matters is that it refuses to guess: the
+cases where an estimate would be dishonest are the ones most likely to reach a
+purchasing decision.
+"""
+
+from datetime import datetime, timedelta, timezone
+
+from plugins.printers.services.supply_history import (
+    analyse, burn_rate, current_run, find_replacements, normalise, soonest,
+)
+
+START = datetime(2026, 6, 1, tzinfo=timezone.utc)
+
+
+def series(levels, hours=24):
+    """[(clock, value)] one reading per `hours`, as Zabbix returns them."""
+    return [(str(int((START + timedelta(hours=i * hours)).timestamp())), str(v))
+            for i, v in enumerate(levels)]
+
+
+def test_counts_one_replacement_per_upward_step():
+    points = normalise(series([80, 60, 40, 20, 100, 80, 60, 95, 70]))
+
+    assert len(find_replacements(points)) == 2
+
+
+def test_ignores_a_wobble_that_is_not_a_replacement():
+    """SNMP rounding and a gauge settling both nudge a reading upward."""
+    points = normalise(series([60, 58, 61, 57, 55]))
+
+    assert find_replacements(points) == []
+
+
+def test_estimate_uses_only_the_current_cartridge():
+    """Fitting across a swap averages a spent cartridge with a fresh one."""
+    points = normalise(series([90, 60, 30, 100, 90, 80, 70]))
+
+    run = current_run(points)
+
+    assert [level for _, level in run] == [100, 90, 80, 70]
+
+
+def test_days_left_from_a_steady_drain():
+    # 10 points a day apart, 5% a day, ending at 55%
+    result = analyse(series([100, 95, 90, 85, 80, 75, 70, 65, 60, 55]))
+
+    assert result['burnrateperday'] == 5.0
+    assert result['daysleft'] == 11          # 55 / 5
+    assert result['reason'] is None
+    assert result['basisdays'] == 9.0
+
+
+def test_no_estimate_from_two_readings():
+    """Two points through a coarse gauge can prove any rate at all."""
+    result = analyse(series([100, 90]))
+
+    assert result['daysleft'] is None
+    assert result['reason'] == 'not enough history yet'
+
+
+def test_no_estimate_while_the_gauge_has_not_moved():
+    """A printer reporting in 10% steps sits on a plateau for a fortnight."""
+    result = analyse(series([70, 70, 70, 70, 70, 70]))
+
+    assert result['daysleft'] is None
+    assert result['reason'] == 'level has not moved enough to estimate'
+
+
+def test_a_recent_replacement_says_so_rather_than_guessing():
+    result = analyse(series([40, 30, 20, 10, 100, 98]))
+
+    assert result['daysleft'] is None
+    assert result['reason'] == 'replaced recently'
+    assert result['replacements'] == 1
+    assert result['lastreplaced'] is not None
+
+
+def test_empty_history_is_reported_not_crashed():
+    result = analyse([])
+
+    assert result['reason'] == 'no history'
+    assert result['currentlevel'] is None
+    assert result['replacements'] == 0
+
+
+def test_junk_rows_are_dropped_not_fatal():
+    points = normalise([('notaclock', '50'), ('1780000000', 'n/a'),
+                        ('1780000000', '50')])
+
+    assert len(points) == 1
+
+
+def test_days_left_never_goes_negative():
+    result = analyse(series([20, 15, 10, 5, 0]))
+
+    assert result['daysleft'] == 0
+
+
+def test_printer_sorts_by_its_soonest_supply():
+    """A colour MFP is as urgent as its most pressing cartridge."""
+    supplies = [{'daysleft': 40}, {'daysleft': 6}, {'daysleft': None}]
+
+    assert soonest(supplies) == 6
+
+
+def test_soonest_is_none_when_nothing_can_be_estimated():
+    assert soonest([{'daysleft': None}, {'daysleft': None}]) is None
+
+
+def test_burn_rate_needs_elapsed_time():
+    """Several readings in the same second is not a rate."""
+    clock = str(int(START.timestamp()))
+    points = normalise([(clock, '90'), (clock, '80'), (clock, '70'), (clock, '60')])
+
+    assert burn_rate(points) is None
+
+
+def test_forecast_endpoint_says_so_when_zabbix_is_absent(client, db):
+    """A dashboard must be told the data is missing, not shown an empty list
+    that reads as 'nothing runs out soon'."""
+    response = client.get('/api/printers/supplies/forecast')
+
+    assert response.status_code == 200
+    body = response.get_json()['data']
+    assert body['available'] is False
+    assert 'not configured' in body['reason']
+    assert body['printers'] == []

tests/test_plugins/test_tools.py

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+"""Tests for the Tech Tools plugin.
+
+The plugin owns no API and no tables, so the whole backend contract is: it
+loads, it advertises one nav entry, and it claims no database. That last part
+matters - a plugin that accidentally returns models would pull the tools
+section into the migration and prune-schema machinery it has no business in.
+"""
+
+import json
+import os
+
+from plugins.tools.plugin import ToolsPlugin
+
+
+PLUGIN_DIR = os.path.join(os.path.dirname(os.path.dirname(
+    os.path.dirname(os.path.abspath(__file__)))), 'plugins', 'tools')
+
+
+def test_meta_matches_manifest():
+    """The manifest is the single source of truth per ADR-002."""
+    with open(os.path.join(PLUGIN_DIR, 'manifest.json'), encoding='utf-8') as handle:
+        manifest = json.load(handle)
+
+    meta = ToolsPlugin().meta
+    assert meta.name == manifest['name']
+    assert meta.version == manifest['version']
+    assert meta.core_version == manifest['core_version']
+
+
+def test_no_backend_surface():
+    """Client-side only: no blueprint to register, no tables to migrate."""
+    plugin = ToolsPlugin()
+    assert plugin.get_blueprint() is None
+    assert plugin.get_models() == []
+
+
+def test_navigation_item():
+    items = ToolsPlugin().get_navigation_items()
+    assert len(items) == 1
+    item = items[0]
+    assert item['name'] == 'Tech Tools'
+    assert item['route'] == '/tools'
+    # The icon has to exist in AppLayout's iconMap or the nav entry renders
+    # with no glyph.
+    assert item['icon'] == 'wrench'
+
+
+def test_nav_icon_is_mapped_in_the_frontend():
+    """Guard the one cross-file coupling: nav icon name -> AppLayout iconMap."""
+    layout = os.path.join(os.path.dirname(PLUGIN_DIR), '..', 'frontend', 'src',
+                          'views', 'AppLayout.vue')
+    with open(os.path.normpath(layout), encoding='utf-8') as handle:
+        source = handle.read()
+    for item in ToolsPlugin().get_navigation_items():
+        assert f"'{item['icon']}':" in source

tests/test_plugins/test_warranty_proof.py

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+"""Tests for the warranty proof-of-cover document.
+
+A provider lookup answers whether a unit is covered; it does not produce the
+invoice or the extended-warranty certificate. Those had nowhere to live, so
+they stayed in somebody's mailbox. These pin the parts that are easy to get
+wrong: the document is authenticated on the way out, one per warranty, and the
+vendor's own filename survives so a download is recognisable.
+"""
+
+import io
+
+from plugins.warranty.models import Warranty
+
+
+def _warranty(db, vendor='Dell'):
+    w = Warranty(vendor=vendor, servicetag='ABC123', provider='manual')
+    db.session.add(w)
+    db.session.commit()
+    return w
+
+
+def test_upload_sets_url_and_keeps_the_original_filename(client, db, auth_headers):
+    w = _warranty(db)
+
+    response = client.post(f'/api/warranty/{w.warrantyid}/proof',
+                           data={'file': (io.BytesIO(b'%PDF-1.4 invoice'),
+                                          'Dell invoice 4471.pdf')},
+                           content_type='multipart/form-data',
+                           headers=auth_headers)
+
+    assert response.status_code == 200, response.get_json()
+    body = response.get_json()['data']
+    assert body['proofurl'] == f'/api/warranty/proof/warranty-{w.warrantyid}.pdf'
+    assert body['prooffilename'] == 'Dell invoice 4471.pdf'
+
+
+def test_download_needs_a_token_and_uses_the_vendor_filename(client, db, auth_headers):
+    """An invoice carries pricing and a service tag - not open like an asset photo."""
+    w = _warranty(db)
+    client.post(f'/api/warranty/{w.warrantyid}/proof',
+                data={'file': (io.BytesIO(b'%PDF-1.4 invoice'), 'Dell invoice 4471.pdf')},
+                content_type='multipart/form-data', headers=auth_headers)
+    path = f'/api/warranty/proof/warranty-{w.warrantyid}.pdf'
+
+    assert client.get(path).status_code == 401
+
+    authed = client.get(path, headers=auth_headers)
+    assert authed.status_code == 200
+    assert authed.data == b'%PDF-1.4 invoice'
+    disposition = authed.headers.get('Content-Disposition', '')
+    assert 'attachment' in disposition
+    assert 'Dell invoice 4471.pdf' in disposition
+
+
+def test_rejects_an_unsupported_type(client, db, auth_headers):
+    w = _warranty(db)
+
+    response = client.post(f'/api/warranty/{w.warrantyid}/proof',
+                           data={'file': (io.BytesIO(b'MZ'), 'setup.exe')},
+                           content_type='multipart/form-data',
+                           headers=auth_headers)
+
+    assert response.status_code == 400
+    assert 'Unsupported document type' in response.get_data(as_text=True)
+
+
+def test_rejects_an_oversize_document(client, db, auth_headers, monkeypatch):
+    from plugins.warranty.api import routes
+    monkeypatch.setattr(routes, 'MAX_PROOF_BYTES', 512)
+    w = _warranty(db)
+
+    response = client.post(f'/api/warranty/{w.warrantyid}/proof',
+                           data={'file': (io.BytesIO(b'x' * 2048), 'scan.pdf')},
+                           content_type='multipart/form-data',
+                           headers=auth_headers)
+
+    assert response.status_code == 400
+    assert 'the limit is' in response.get_data(as_text=True)
+
+
+def test_replacing_keeps_one_document_per_warranty(client, db, auth_headers):
+    import glob
+    import os
+    from flask import current_app
+    w = _warranty(db)
+
+    client.post(f'/api/warranty/{w.warrantyid}/proof',
+                data={'file': (io.BytesIO(b'first'), 'scan.png')},
+                content_type='multipart/form-data', headers=auth_headers)
+    client.post(f'/api/warranty/{w.warrantyid}/proof',
+                data={'file': (io.BytesIO(b'%PDF second'), 'invoice.pdf')},
+                content_type='multipart/form-data', headers=auth_headers)
+
+    proofdir = os.path.join(current_app.instance_path, 'warrantyproofs')
+    files = glob.glob(os.path.join(proofdir, f'warranty-{w.warrantyid}.*'))
+    assert len(files) == 1 and files[0].endswith('.pdf')
+
+
+def test_removing_clears_both_columns(client, db, auth_headers):
+    w = _warranty(db)
+    client.post(f'/api/warranty/{w.warrantyid}/proof',
+                data={'file': (io.BytesIO(b'%PDF'), 'invoice.pdf')},
+                content_type='multipart/form-data', headers=auth_headers)
+
+    response = client.delete(f'/api/warranty/{w.warrantyid}/proof',
+                             headers=auth_headers)
+
+    body = response.get_json()['data']
+    assert body['proofurl'] is None
+    assert body['prooffilename'] is None