performance improvements

inire/tests/test_components.py

@@ -50,7 +50,7 @@ def test_sbend_generation() -> None:
     result = SBend.generate(start, offset, radius, width)
     assert result.end_port.y == 5.0
     assert result.end_port.orientation == 0.0
-    assert len(result.geometry) == 1 # Now uses unary_union
+    assert len(result.geometry) == 2 # Optimization: returns individual arcs
 
     # Verify failure for large offset
     with pytest.raises(ValueError, match=r"SBend offset .* must be less than 2\*radius"):
@@ -85,11 +85,13 @@ def test_sbend_collision_models() -> None:
     width = 2.0
 
     res_bbox = SBend.generate(start, offset, radius, width, collision_type="bbox")
-    # Geometry should be a single bounding box polygon
-    assert len(res_bbox.geometry) == 1
+    # Geometry should be a list of individual bbox polygons for each arc
+    assert len(res_bbox.geometry) == 2
 
     res_arc = SBend.generate(start, offset, radius, width, collision_type="arc")
-    assert res_bbox.geometry[0].area > res_arc.geometry[0].area
+    area_bbox = sum(p.area for p in res_bbox.geometry)
+    area_arc = sum(p.area for p in res_arc.geometry)
+    assert area_bbox > area_arc
 
 
 def test_sbend_continuity() -> None:
@@ -107,9 +109,10 @@ def test_sbend_continuity() -> None:
     # For a port at 90 deg, +offset is a shift in -x direction
     assert abs(res.end_port.x - (10.0 - offset)) < 1e-6
 
-    # Geometry should be connected (unary_union results in 1 polygon)
-    assert len(res.geometry) == 1
-    assert res.geometry[0].is_valid
+    # Geometry should be a list of valid polygons
+    assert len(res.geometry) == 2
+    for p in res.geometry:
+        assert p.is_valid
 
 
 def test_arc_sagitta_precision() -> None: