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diff --git a/test/triple_store/sparql/test_distance.py b/test/triple_store/sparql/test_distance.py
new file mode 100644
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+++ b/test/triple_store/sparql/test_distance.py
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+
+# imports
+import numpy as np
+import unittest
+
+# objects to test
+from bsfs.triple_store.sparql import distance
+
+
+## code ##
+
+class TestDistance(unittest.TestCase):
+
+    def test_euclid(self):
+        # self-distance is zero
+        self.assertEqual(distance.euclid([1,2,3,4], [1,2,3,4]), 0.0)
+        # accepts list-like arguments
+        self.assertAlmostEqual(distance.euclid([1,2,3,4], [2,3,4,5]), 2.0, 3)
+        self.assertAlmostEqual(distance.euclid((1,2,3,4), (2,3,4,5)), 2.0, 3)
+        # dimension can vary
+        self.assertAlmostEqual(distance.euclid([1,2,3], [2,3,4]), 1.732, 3)
+        self.assertAlmostEqual(distance.euclid([1,2,3,4,5], [2,3,4,5,6]), 2.236, 3)
+        # vector can be zero
+        self.assertAlmostEqual(distance.euclid([0,0,0], [1,2,3]), 3.742, 3)
+
+    def test_cosine(self):
+        # self-distance is zero
+        self.assertEqual(distance.cosine([1,2,3,4], [1,2,3,4]), 0.0)
+        # accepts list-like arguments
+        self.assertAlmostEqual(distance.cosine([1,2,3,4], [4,3,2,1]), 0.333, 3)
+        self.assertAlmostEqual(distance.cosine((1,2,3,4), (4,3,2,1)), 0.333, 3)
+        # dimension can vary
+        self.assertAlmostEqual(distance.cosine([1,2,3], [3,2,1]), 0.286, 3)
+        self.assertAlmostEqual(distance.cosine([1,2,3,4,5], [5,4,3,2,1]), 0.364, 3)
+        # vector can be zero
+        self.assertAlmostEqual(distance.cosine([0,0,0], [1,2,3]), 1.0, 3)
+
+    def test_manhatten(self):
+        # self-distance is zero
+        self.assertEqual(distance.manhatten([1,2,3,4], [1,2,3,4]), 0.0)
+        # accepts list-like arguments
+        self.assertAlmostEqual(distance.manhatten([1,2,3,4], [2,3,4,5]), 4.0, 3)
+        self.assertAlmostEqual(distance.manhatten((1,2,3,4), (2,3,4,5)), 4.0, 3)
+        # dimension can vary
+        self.assertAlmostEqual(distance.manhatten([1,2,3], [2,3,4]), 3.0, 3)
+        self.assertAlmostEqual(distance.manhatten([1,2,3,4,5], [2,3,4,5,6]), 5.0, 3)
+        # vector can be zero
+        self.assertAlmostEqual(distance.manhatten([0,0,0], [1,2,3]), 6.0, 3)
+
+
+## main ##
+
+if __name__ == '__main__':
+    unittest.main()
+
+## EOF ##