1 files changed, 46 insertions, 2 deletions
diff --git a/cython/test/test_simplex_tree.py b/cython/test/test_simplex_tree.py
index 6dec5d94..cb701c9a 100755
--- a/cython/test/test_simplex_tree.py
+++ b/cython/test/test_simplex_tree.py
@@ -6,7 +6,7 @@ from gudhi import SimplexTree
 
    Author(s):       Vincent Rouvreau
 
-   Copyright (C) 2016 INRIA
+   Copyright (C) 2016 Inria
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -23,7 +23,7 @@ from gudhi import SimplexTree
 """
 
 __author__ = "Vincent Rouvreau"
-__copyright__ = "Copyright (C) 2016 INRIA"
+__copyright__ = "Copyright (C) 2016 Inria"
 __license__ = "GPL v3"
 
 
@@ -161,3 +161,47 @@ def test_automatic_dimension():
     assert st.upper_bound_dimension() == 2
     assert st.dimension() == 1
     assert st.upper_bound_dimension() == 1
+
+def test_make_filtration_non_decreasing():
+    st = SimplexTree()
+    assert st.__is_defined() == True
+    assert st.__is_persistence_defined() == False
+
+    # Inserted simplex:
+    #    1
+    #    o
+    #   /X\
+    #  o---o---o---o
+    #  2   0   3\X/4
+    #            o
+    #            5
+    assert st.insert([2, 1, 0], filtration=2.0) == True
+    assert st.insert([3, 0], filtration=2.0) == True
+    assert st.insert([3, 4, 5], filtration=2.0) == True
+
+    assert st.make_filtration_non_decreasing() == False
+
+    # Because of non decreasing property of simplex tree, { 0 } , { 1 } and
+    # { 0, 1 } are going to be set from value 2.0 to 1.0
+    st.insert([0, 1, 6, 7], filtration=1.0);
+
+    assert st.make_filtration_non_decreasing() == False
+
+    # Modify specific values to test make_filtration_non_decreasing
+    st.assign_filtration([0,1,6,7], 0.8);
+    st.assign_filtration([0,1,6], 0.9);
+    st.assign_filtration([0,6], 0.6);
+    st.assign_filtration([3,4,5], 1.2);
+    st.assign_filtration([3,4], 1.1);
+    st.assign_filtration([4,5], 1.99);
+
+    assert st.make_filtration_non_decreasing() == True
+
+    assert st.filtration([0,1,6,7]) == 1.
+    assert st.filtration([0,1,6]) == 1.
+    assert st.filtration([0,1]) == 1.
+    assert st.filtration([0]) == 1.
+    assert st.filtration([1]) == 1.
+    assert st.filtration([3,4,5]) == 2.
+    assert st.filtration([3,4]) == 2.
+    assert st.filtration([4,5]) == 2.