adding another test

tests/test_straight_skeleton_2.py

@@ -1,4 +1,5 @@
 from compas_cgal.straight_skeleton_2 import create_interior_straight_skeleton
+from compas.tolerance import TOL
 
 
 def test_straight_polygon():
@@ -14,3 +15,43 @@ def test_straight_polygon():
     ]
     lines = create_interior_straight_skeleton(points)
     assert len(lines) == 8
+
+
+def test_straight_polygon_2_compare():
+    points = [
+        (-1.91, 3.59, 0.0),
+        (-5.53, -5.22, 0.0),
+        (-0.39, -1.98, 0.0),
+        (2.98, -5.51, 0.0),
+        (4.83, -2.02, 0.0),
+        (9.70, -3.63, 0.0),
+        (12.23, 1.25, 0.0),
+        (3.42, 0.66, 0.0),
+        (2.92, 4.03, 0.0),
+        (-1.91, 3.59, 0.0),
+    ]
+    lines = create_interior_straight_skeleton(points)
+
+    expected = [
+        [[-1.91, 3.59, 0.0], [-0.139446292, 1.191439787, 0.0]],
+        [[-5.53, -5.22, 0.0], [-0.139446292, 1.191439787, 0.0]],
+        [[-0.39, -1.98, 0.0], [0.008499564, 1.241560466, 0.0]],
+        [[2.98, -5.51, 0.0], [2.44972507, -1.674799065, 0.0]],
+        [[4.83, -2.02, 0.0], [4.228131167, -0.522007766, 0.0]],
+        [[8.663865218, -1.084821998, 0.0], [9.7, -3.63, 0.0]],
+        [[12.23, 1.25, 0.0], [8.663865218, -1.084821998, 0.0]],
+        [[3.42, 0.66, 0.0], [1.755862468, -1.404991433, 0.0]],
+        [[2.92, 4.03, 0.0], [0.563706846, 1.033296141, 0.0]],
+        [[4.228131167, -0.522007766, 0.0], [2.44972507, -1.674799065, 0.0]],
+        [[4.228131167, -0.522007766, 0.0], [8.663865218, -1.084821998, 0.0]],
+        [[1.755862468, -1.404991433, 0.0], [2.44972507, -1.674799065, 0.0]],
+        [[0.563706846, 1.033296141, 0.0], [1.755862468, -1.404991433, 0.0]],
+        [[-0.139446292, 1.191439787, 0.0], [0.008499564, 1.241560466, 0.0]],
+        [[0.563706846, 1.033296141, 0.0], [0.008499564, 1.241560466, 0.0]],
+    ]
+    for act, exp in zip(lines, expected):
+        sa, ea = act
+        se, ee = exp
+        # the line direction sometimes changes ...
+        assert TOL.is_allclose(sa, se) or TOL.is_allclose(sa, ee)
+        assert TOL.is_allclose(ea, ee) or TOL.is_allclose(ea, se)