import json
import os
import unittest

from surf.geometry import Vertex, PolygonMesh


class TestEdge(unittest.TestCase):

    def setUp(self):
        path, file_name = os.path.split(__file__)
        self.samples_dir = os.path.join(path, os.pardir, os.pardir,
                'blender', 'samples')
        self.cube_file_name = os.path.join(self.samples_dir, 'cube.json')
        with open(self.cube_file_name, 'r') as cube_file:
            cube_json = json.load(cube_file)
            self.cube = PolygonMesh(**cube_json)

    def test_centroid(self):
        e = self.cube.edges[0]
        v = self.cube.centroid(e)
        self.assertEqual(v, Vertex(-1, 0, 1))


if __name__ == '__main__':
    unittest.main(verbosity=3)