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"""
Part of the bsfs test suite.
A copy of the license is provided with the project.
Author: Matthias Baumgartner, 2022
"""
# 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 ##
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