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#!/usr/bin/env python
import unittest
from ephem import Angle, degrees, hours
# Determine whether angles work reasonably.
arcsecond_places = 5
class AngleTests(unittest.TestCase):
def setUp(self):
self.d = degrees(1.5)
self.h = hours(1.6)
def test_Angle_constructor(self):
self.assertRaises(TypeError, Angle, 1.1)
def test_degrees_constructor(self):
self.assertAlmostEqual(self.d, degrees('85:56:37'),
places=arcsecond_places)
self.assertAlmostEqual(self.d, degrees('85::3397'),
places=arcsecond_places)
self.assertAlmostEqual(self.d, degrees('::309397'),
places=arcsecond_places)
self.assertAlmostEqual(self.d, degrees('85 56 37'),
places=arcsecond_places)
self.assertAlmostEqual(self.d, degrees('85 56:37'),
places=arcsecond_places)
self.assertAlmostEqual(self.d, degrees('85:56 37'),
places=arcsecond_places)
self.assertAlmostEqual(self.d, degrees('85 : 56 : 37'),
places=arcsecond_places)
self.assertAlmostEqual(self.d, degrees(' 85 : 56 : 37 '),
places=arcsecond_places)
self.assertAlmostEqual(self.d, degrees(' : : 309397 '),
places=arcsecond_places)
def test_degrees_constructor_refuses_alphabetics(self):
self.assertRaises(ValueError, degrees, 'foo:bar')
self.assertRaises(ValueError, degrees, '1:bar')
self.assertRaises(ValueError, degrees, '1:2:bar')
self.assertRaises(ValueError, degrees, '1:2:3bar')
def test_degrees_float_value(self):
self.assertAlmostEqual(self.d, 1.5)
def test_degrees_string_value(self):
self.assertEqual(str(self.d), '85:56:37.2')
def test_hours_constructor(self):
self.assertAlmostEqual(self.h, hours('6:06:41.6'),
places=arcsecond_places)
def test_hours_float_value(self):
self.assertAlmostEqual(self.h, 1.6)
def test_hours_string_value(self):
self.assertEqual(str(self.h), '6:06:41.58')
def test_angle_addition(self):
self.assertAlmostEqual(degrees('30') + degrees('90'), degrees('120'))
def test_angle_subtraction(self):
self.assertAlmostEqual(degrees('180') - hours('9'), degrees('45'))
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