import unittest


class MeanVectorAverageTests(unittest.TestCase):

    def _fut(self, input_windspd, input_winddir):
        from aosstower.wind import mean_wind_vector

        return mean_wind_vector(input_windspd, input_winddir)

    def test_scalar_input(self):

        for wdir, wspd in [(0, 20), (90, 20), (180, 20), (270, 20)]:
            output_speed, output_dir = self._fut(wspd, wdir)
            self.assertEqual(wdir, output_dir)
            self.assertEqual(wspd, 20)

    def test_array_input(self):

        for wdir, wspd in [([0, 90, 180, 270],[10, 10, 10, 10])]:
            output_speed, output_winddir = self._fut(wspd, wdir)
            self.assertEqual(wdir, output_winddir.tolist())
            self.assertEqual(wspd, output_speed.tolist())