#!/usr/bin/env python

"""
test distance calculations
"""

import os
import unittest
from tvii.distance import distance

class TestDistance(unittest.TestCase):

    def test_triagle(self):
        """a simple triangle"""

        x = [0., 3.]
        y = [4., 0.]

        assert (distance(x, y) - 5.)**2 < 1e-6

if __name__ == '__main__':
    unittest.main()