#!/usr/bin/env python

"""
test bounding box
"""

import unittest
from tvii.bb import bounding_box
from tvii.bb import overlap

class TestBoundingBox(unittest.TestCase):

    def test_integers(self):
        """basic bounding box test case"""

        # We'll test with integers for ease
        points = [(-1, 0),
                  (0, 1),
                  (1, 2),
                  (-1, 2),
                  (0, 0)]

        box = bounding_box(*points)
        assert box == [(-1, 1),  # x
                       (0, 2)]   # y

    def test_overlap(self):
        """tests if bounding boxes overlap"""

        square1 = [(0.,0.),
                   (1.,1.)]
        bb1 = bounding_box(*square1)
        assert bb1 == [(0., 1.),
                       (0., 1.)]

        # this doesn't overlap
        square_right = [(2.,0.),
                        (3.,1)]
        bb_right = bounding_box(*square_right)
        # ((0.0, 1.0), (2.0, 3.0))
        # ((0.0, 1.0), (0.0, 1))
        assert not overlap(bb1, bb_right)

        # nor does this
        square_up = [(0., 1.5),
                     (1., 1.9)]
        assert not overlap(bb1,
                           bounding_box(*square_up))

        # but this does
        square_overlap = [(0.5, 0.5),
                          (1.5, 1.5)]
        assert overlap(bb1,
                       bounding_box(*square_overlap))

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