1 files changed, 18 insertions, 0 deletions
diff --git a/src/python/test/test_simplex_tree.py b/src/python/test/test_simplex_tree.py
index 2137d822..83be0602 100755
--- a/src/python/test/test_simplex_tree.py
+++ b/src/python/test/test_simplex_tree.py
@@ -340,3 +340,21 @@ def test_simplices_iterator():
         assert st.find(simplex[0]) == True
         print("filtration is: ", simplex[1])
         assert st.filtration(simplex[0]) == simplex[1]
+
+def test_collapse_edges():
+    st = SimplexTree()
+    
+    assert st.insert([0, 1], filtration=1.0) == True
+    assert st.insert([1, 2], filtration=1.0) == True
+    assert st.insert([2, 3], filtration=1.0) == True
+    assert st.insert([0, 3], filtration=1.0) == True
+    assert st.insert([0, 2], filtration=2.0) == True
+    assert st.insert([1, 3], filtration=2.0) == True
+
+    assert st.num_simplices() == 10
+
+    st.collapse_edges()
+    assert st.num_simplices() == 9
+    assert st.find([1, 3]) == False
+    for simplex in st.get_skeleton(0): 
+        assert simplex[1] == 1.