1 files changed, 90 insertions, 0 deletions
diff --git a/src/python/test/test_alpha_complex.py b/src/python/test/test_alpha_complex.py
new file mode 100755
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+++ b/src/python/test/test_alpha_complex.py
@@ -0,0 +1,90 @@
+from gudhi import AlphaComplex, SimplexTree
+
+""" This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
+    See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details.
+    Author(s):       Vincent Rouvreau
+
+    Copyright (C) 2016 Inria
+
+    Modification(s):
+      - YYYY/MM Author: Description of the modification
+"""
+
+__author__ = "Vincent Rouvreau"
+__copyright__ = "Copyright (C) 2016 Inria"
+__license__ = "MIT"
+
+
+def test_empty_alpha():
+    alpha_complex = AlphaComplex(points=[[0, 0]])
+    assert alpha_complex.__is_defined() == True
+
+
+def test_infinite_alpha():
+    point_list = [[0, 0], [1, 0], [0, 1], [1, 1]]
+    alpha_complex = AlphaComplex(points=point_list)
+    assert alpha_complex.__is_defined() == True
+
+    simplex_tree = alpha_complex.create_simplex_tree()
+    assert simplex_tree.__is_persistence_defined() == False
+
+    assert simplex_tree.num_simplices() == 11
+    assert simplex_tree.num_vertices() == 4
+
+    assert simplex_tree.get_filtration() == [
+        ([0], 0.0),
+        ([1], 0.0),
+        ([2], 0.0),
+        ([3], 0.0),
+        ([0, 1], 0.25),
+        ([0, 2], 0.25),
+        ([1, 3], 0.25),
+        ([2, 3], 0.25),
+        ([1, 2], 0.5),
+        ([0, 1, 2], 0.5),
+        ([1, 2, 3], 0.5),
+    ]
+    assert simplex_tree.get_star([0]) == [
+        ([0], 0.0),
+        ([0, 1], 0.25),
+        ([0, 1, 2], 0.5),
+        ([0, 2], 0.25),
+    ]
+    assert simplex_tree.get_cofaces([0], 1) == [([0, 1], 0.25), ([0, 2], 0.25)]
+
+    assert point_list[0] == alpha_complex.get_point(0)
+    assert point_list[1] == alpha_complex.get_point(1)
+    assert point_list[2] == alpha_complex.get_point(2)
+    assert point_list[3] == alpha_complex.get_point(3)
+    assert alpha_complex.get_point(4) == []
+    assert alpha_complex.get_point(125) == []
+
+
+def test_filtered_alpha():
+    point_list = [[0, 0], [1, 0], [0, 1], [1, 1]]
+    filtered_alpha = AlphaComplex(points=point_list)
+
+    simplex_tree = filtered_alpha.create_simplex_tree(max_alpha_square=0.25)
+
+    assert simplex_tree.num_simplices() == 8
+    assert simplex_tree.num_vertices() == 4
+
+    assert point_list[0] == filtered_alpha.get_point(0)
+    assert point_list[1] == filtered_alpha.get_point(1)
+    assert point_list[2] == filtered_alpha.get_point(2)
+    assert point_list[3] == filtered_alpha.get_point(3)
+    assert filtered_alpha.get_point(4) == []
+    assert filtered_alpha.get_point(125) == []
+
+    assert simplex_tree.get_filtration() == [
+        ([0], 0.0),
+        ([1], 0.0),
+        ([2], 0.0),
+        ([3], 0.0),
+        ([0, 1], 0.25),
+        ([0, 2], 0.25),
+        ([1, 3], 0.25),
+        ([2, 3], 0.25),
+    ]
+    assert simplex_tree.get_star([0]) == [([0], 0.0), ([0, 1], 0.25), ([0, 2], 0.25)]
+    assert simplex_tree.get_cofaces([0], 1) == [([0, 1], 0.25), ([0, 2], 0.25)]