TRO-JSON v4: Slots je TRO und Staubereiche (jamAreas)

- model: Slot (separator/switch/scanner/drive + Rollen), JamArea (J<Separator>,
  Eingang eines TRO mit allen Vorgaengern), derive_slots, derive_jam_areas;
  Schema sps_skel-tro-v4, v3-Dateien werden weiter gelesen
- scl_context: ein JamEntr je eigenem Staubereich statt je Vorgaenger (wie
  UH01-UH05), Ausgaenge nennen den Staubereich des Nachfolgers
- Golden Files neu erzeugt, Tests fuer Slots/Staubereiche, Doku nachgezogen

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/test_model.py

@@ -136,3 +136,65 @@ def test_scl_skeleton_renders_from_document(document):
     # Systemgrenzen sind keine Instanzen
     assert "SYS1 :" not in scl
     assert "Anfang bei TRO01" in scl
+
+
+# ---------------------------------------------------------------------------
+# Schema v4: Slots und Staubereiche
+# ---------------------------------------------------------------------------
+
+def test_slots_aus_katalog_und_layout(document):
+    weiche = document.by_id("TRO01")
+    assert [(s.slot, s.layout_id) for s in weiche.slots] == [
+        ("separator1", "0040"), ("switch1", "")]
+    assert weiche.slots[0].roles == ["sensor", "stopper", "jamSensor?", "partSensor?"]
+    vario = document.by_id("TRO03")
+    assert [s.slot for s in vario.slots] == ["separator1", "drive"]
+    assert vario.slots[1].layout_id == "0001"  # Host = angetriebene Strecke
+    # Systemgrenzen haben keine Slots
+    assert document.by_id("SYS1").slots == []
+
+
+def test_ein_staubereich_je_tro_eingang_nach_separator(document):
+    areas = {a.jam_id: a for a in document.jam_areas}
+    assert sorted(areas) == ["J0040", "J0041", "J0042"]
+    assert areas["J0040"].tro == "TRO01"
+    assert areas["J0040"].predecessors == ["SYS1"]
+    assert areas["J0040"].position == (1030.0, 4700.0, 1500.0)
+    assert areas["J0041"].predecessors == ["TRO01"]
+
+
+def test_zusammenfuehrung_ein_staubereich_mehrere_vorgaenger():
+    analysis = Analysis(tros=[
+        _tro("TRO01", "1Sep", separators=["0001"], successors=["TRO03"]),
+        _tro("TRO02", "1Sep", separators=["0002"], successors=["TRO03"]),
+        _tro("TRO03", "1Sep", separators=["0003"], predecessors=["TRO01", "TRO02"]),
+    ])
+    doc = TroDocument.from_analysis(analysis, source="t")
+    eingang = [a for a in doc.jam_areas if a.tro == "TRO03"]
+    assert [(a.jam_id, a.predecessors) for a in eingang] == [("J0003", ["TRO01", "TRO02"])]
+
+
+def test_zwei_separatoren_zwei_eingaenge_aufteilung_offen():
+    analysis = Analysis(tros=[
+        _tro("TRO01", "2Sep2Swi", separators=["0005", "0036"], predecessors=["TRO09"]),
+    ])
+    areas = TroDocument.from_analysis(analysis, source="t").jam_areas
+    assert [(a.jam_id, a.entry, a.predecessors) for a in areas] == [
+        ("J0005", 1, ["TRO09"]), ("J0036", 2, [])]
+    assert all("offen" in a.note for a in areas)
+
+
+def test_v4_round_trip_und_v3_ohne_jam_areas(document):
+    data = json.loads(document.to_json())
+    assert data["schema"] == "sps_skel-tro-v4"
+    assert data["jamAreas"][0]["id"] == "J0040"
+    assert data["tros"][0]["slots"][0]["layoutId"] == "0040"
+    assert TroDocument.from_json(document.to_json()) == document
+    # v3-Datei: keine jamAreas/slots -> beim Rendern abgeleitet
+    del data["jamAreas"]
+    for tro in data["tros"]:
+        del tro["slots"]
+    data["schema"] = "sps_skel-tro-v3"
+    alt = TroDocument.from_json(json.dumps(data))
+    assert alt.jam_areas == []
+    assert [a.jam_id for a in alt.jam_areas_or_derived()] == ["J0040", "J0041", "J0042"]