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SimpleCADAPI-master/tests/test_topology_identity.py

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+from __future__ import annotations
+
+from collections import defaultdict
+
+import simplecadapi as scad
+
+
+def _box_edge_occurrences():
+    box = scad.make_box_rsolid(1.0, 1.0, 1.0)
+    occurrences = []
+    for face in box.get_faces():
+        occurrences.extend(face.get_outer_wire().get_edges())
+    return box, occurrences
+
+
+def test_box_edge_occurrences_share_canonical_topo_ids():
+    _, occurrences = _box_edge_occurrences()
+
+    assert len(occurrences) == 24
+    assert len({edge.topo_id for edge in occurrences}) == 12
+
+
+def test_shared_edge_occurrences_share_tags_and_metadata():
+    _, occurrences = _box_edge_occurrences()
+    groups = defaultdict(list)
+    for edge in occurrences:
+        groups[edge.topo_id].append(edge)
+
+    shared = next(group for group in groups.values() if len(group) >= 2)
+    edge_a, edge_b = shared[0], shared[1]
+
+    scad.apply_tag(edge_a, "shared.edge")
+    edge_a.set_metadata("name", "same-topological-edge")
+
+    assert "shared.edge" in scad.list_tags(edge_b)
+    assert edge_b.get_metadata("name") == "same-topological-edge"
+
+
+def test_solid_get_edges_returns_unique_topological_edges():
+    box, _ = _box_edge_occurrences()
+
+    edges = box.get_edges()
+
+    assert len(edges) == 12
+    assert len({edge.topo_id for edge in edges}) == 12
+
+
+def test_edge_incident_faces_and_face_adjacency_are_available():
+    box, _ = _box_edge_occurrences()
+
+    edge = box.get_edges(0)
+    incident_faces = edge.get_incident_faces()
+
+    assert len(incident_faces) == 2
+    assert len({face.topo_id for face in incident_faces}) == 2
+
+    face = box.get_faces(0)
+    adjacent_faces = face.get_adjacent_faces()
+
+    assert len(adjacent_faces) == 4
+    assert face.topo_id not in {adjacent.topo_id for adjacent in adjacent_faces}