# -*- coding: utf-8 -*-
from .base import MeasurementTestBase


from measurement.measures import Distance, Area


class DistanceTest(MeasurementTestBase):
    def test_conversion_equivalence(self):
        miles = Distance(mi=1)
        kilometers = Distance(km=1.609344)

        self.assertAlmostEqual(
            miles.km,
            kilometers.km
        )

    def test_attrib_conversion(self):
        kilometers = Distance(km=1)
        expected_meters = 1000

        self.assertAlmostEqual(
            kilometers.m,
            expected_meters
        )

    def test_identity_conversion(self):
        expected_miles = 10
        miles = Distance(mi=expected_miles)

        self.assertAlmostEqual(
            miles.mi,
            expected_miles
        )

    def test_auto_si_kwargs(self):
        meters = Distance(meter=1e6)
        megameters = Distance(megameter=1)

        self.assertEqual(
            meters,
            megameters,
        )

    def test_auto_si_attrs(self):
        one_meter = Distance(m=1)

        micrometers = one_meter.um

        self.assertEqual(
            one_meter.value * 10**6,
            micrometers
        )

    def test_area_sq_km(self):
        one_sq_km = Area(sq_km=10)
        miles_sqd = Area(sq_mi=3.8610216)

        self.assertAlmostEqual(
            one_sq_km.standard,
            miles_sqd.standard,
            places=1
        )

    def test_set_value(self):
        distance = Distance(mi=10)

        expected_standard = 16093.44
        self.assertEqual(
            distance.standard,
            expected_standard,
        )

        distance.value = 11

        expected_standard = 17702.784
        self.assertEqual(
            distance.standard,
            expected_standard
        )