diff --git a/Polygon_mesh_processing/test/Polygon_mesh_processing/data-clip/clipper_for_tet.off b/Polygon_mesh_processing/test/Polygon_mesh_processing/data-clip/clipper_for_tet.off
new file mode 100644
index 00000000000..5bf5172c52d
--- /dev/null
+++ b/Polygon_mesh_processing/test/Polygon_mesh_processing/data-clip/clipper_for_tet.off
@@ -0,0 +1,22 @@
+OFF
+8 12 0
+-0.74314236640930176 8.9240436553955078 4.3193087577819824
+-1.193142294883728 8.9240436553955078 4.0595011711120605
+-1.193142294883728 8.9240436553955078 4.5791163444519043
+-0.74314236640930176 6.9240436553955078 4.3193087577819824
+-1.193142294883728 6.9240436553955078 4.0595011711120605
+-1.193142294883728 6.9240436553955078 4.5791163444519043
+-1.0431423187255859 8.9240436553955078 4.3193087577819824
+-1.0431423187255859 6.9240436553955078 4.3193087577819824
+3 1 0 4
+3 4 0 3
+3 2 1 5
+3 5 1 4
+3 0 2 3
+3 3 2 5
+3 0 1 6
+3 7 4 3
+3 1 2 6
+3 7 5 4
+3 2 0 6
+3 7 3 5
diff --git a/Polygon_mesh_processing/test/Polygon_mesh_processing/data-clip/splitter_for_tet.off b/Polygon_mesh_processing/test/Polygon_mesh_processing/data-clip/splitter_for_tet.off
new file mode 100644
index 00000000000..d79c282fd14
--- /dev/null
+++ b/Polygon_mesh_processing/test/Polygon_mesh_processing/data-clip/splitter_for_tet.off
@@ -0,0 +1,22 @@
+OFF
+8 12 0
+3.1031479835510254 0.97479420900344849 0.6929168701171875
+2.694915771484375 1.072259783744812 0.38657242059707642
+2.6207075119018555 0.90600115060806274 0.87324607372283936
+3.1330718994140625 -0.91899305582046509 0.050519555807113647
+2.7248396873474121 -0.82152754068374634 -0.25582483410835266
+2.6506311893463135 -0.98778611421585083 0.2308487743139267
+2.8062572479248047 0.98435169458389282 0.65091180801391602
+2.8361809253692627 -0.90943557024002075 0.0085144937038421631
+3 1 0 4
+3 4 0 3
+3 2 1 5
+3 5 1 4
+3 0 2 3
+3 3 2 5
+3 0 1 6
+3 7 4 3
+3 1 2 6
+3 7 5 4
+3 2 0 6
+3 7 3 5
diff --git a/Polygon_mesh_processing/test/Polygon_mesh_processing/data-clip/tet_si_to_split.off b/Polygon_mesh_processing/test/Polygon_mesh_processing/data-clip/tet_si_to_split.off
new file mode 100644
index 00000000000..17b1b983a15
--- /dev/null
+++ b/Polygon_mesh_processing/test/Polygon_mesh_processing/data-clip/tet_si_to_split.off
@@ -0,0 +1,22 @@
+OFF
+8 12 0
+2.5799167156219482 0.14292722940444946 0.16751545667648315
+3.5799167156219482 0.14292722940444946 0.16751545667648315
+2.5799167156219482 1.1429271697998047 0.16751545667648315
+2.5799167156219482 0.14292722940444946 1.1675155162811279
+2.9132499694824219 0.47626054286956787 0.50084877014160156
+3.0660841464996338 0.31353890895843506 0.59145557880401611
+3.0243611335754395 0.58737164735794067 0.27862656116485596
+2.8490166664123535 0.49580642580986023 0.61965477466583252
+3 2 1 0
+3 0 3 2
+3 2 6 1
+3 1 3 0
+3 3 5 2
+3 1 7 3
+3 4 5 3
+3 2 5 4
+3 4 6 2
+3 1 6 4
+3 4 7 1
+3 3 7 4
diff --git a/Polygon_mesh_processing/test/Polygon_mesh_processing/data-clip/tet_with_si_to_clip.off b/Polygon_mesh_processing/test/Polygon_mesh_processing/data-clip/tet_with_si_to_clip.off
new file mode 100644
index 00000000000..1fdb27230ba
--- /dev/null
+++ b/Polygon_mesh_processing/test/Polygon_mesh_processing/data-clip/tet_with_si_to_clip.off
@@ -0,0 +1,22 @@
+OFF
+8 12 0
+-1.3187698125839233 7.6333456039428711 4.0282411575317383
+-0.31876981258392334 7.6333456039428711 4.0282411575317383
+-1.3187698125839233 8.6333456039428711 4.0282411575317383
+-1.3187698125839233 7.6333456039428711 5.0282411575317383
+-0.98543649911880493 7.9666790962219238 4.361574649810791
+-0.83260232210159302 7.803957462310791 4.452181339263916
+-0.87432539463043213 8.0777902603149414 4.1393523216247559
+-1.0496698617935181 7.9862246513366699 4.4803805351257324
+3 2 1 0
+3 0 3 2
+3 2 6 1
+3 1 3 0
+3 3 5 2
+3 1 7 3
+3 4 5 3
+3 2 5 4
+3 4 6 2
+3 1 6 4
+3 4 7 1
+3 3 7 4