django1/django/contrib/gis/tests/test_measure.py

280 lines
7.2 KiB
Python

"""
Distance and Area objects to allow for sensible and convienient calculation
and conversions. Here are some tests.
"""
import unittest
from django.contrib.gis.measure import Distance, Area, D, A
class DistanceTest(unittest.TestCase):
"Testing the Distance object"
def testInit(self):
"Testing initialisation from valid units"
d = Distance(m=100)
self.assertEqual(d.m, 100)
d1, d2, d3 = D(m=100), D(meter=100), D(metre=100)
for d in (d1, d2, d3):
self.assertEqual(d.m, 100)
d = D(nm=100)
self.assertEqual(d.m, 185200)
y1, y2, y3 = D(yd=100), D(yard=100), D(Yard=100)
for d in (y1, y2, y3):
self.assertEqual(d.yd, 100)
mm1, mm2 = D(millimeter=1000), D(MiLLiMeTeR=1000)
for d in (mm1, mm2):
self.assertEqual(d.m, 1.0)
self.assertEqual(d.mm, 1000.0)
def testInitInvalid(self):
"Testing initialisation from invalid units"
self.assertRaises(AttributeError, D, banana=100)
def testAccess(self):
"Testing access in different units"
d = D(m=100)
self.assertEqual(d.km, 0.1)
self.assertAlmostEqual(d.ft, 328.084, 3)
def testAccessInvalid(self):
"Testing access in invalid units"
d = D(m=100)
self.assertFalse(hasattr(d, 'banana'))
def testAddition(self):
"Test addition & subtraction"
d1 = D(m=100)
d2 = D(m=200)
d3 = d1 + d2
self.assertEqual(d3.m, 300)
d3 += d1
self.assertEqual(d3.m, 400)
d4 = d1 - d2
self.assertEqual(d4.m, -100)
d4 -= d1
self.assertEqual(d4.m, -200)
with self.assertRaises(TypeError):
d1 + 1
with self.assertRaises(TypeError):
d1 - 1
with self.assertRaises(TypeError):
d1 += 1
with self.assertRaises(TypeError):
d1 -= 1
def testMultiplication(self):
"Test multiplication & division"
d1 = D(m=100)
d3 = d1 * 2
self.assertEqual(d3.m, 200)
d3 = 2 * d1
self.assertEqual(d3.m, 200)
d3 *= 5
self.assertEqual(d3.m, 1000)
d4 = d1 / 2
self.assertEqual(d4.m, 50)
d4 /= 5
self.assertEqual(d4.m, 10)
d5 = d1 / D(m=2)
self.assertEqual(d5, 50)
a5 = d1 * D(m=10)
self.assertTrue(isinstance(a5, Area))
self.assertEqual(a5.sq_m, 100 * 10)
with self.assertRaises(TypeError):
d1 *= D(m=1)
with self.assertRaises(TypeError):
d1 /= D(m=1)
def testUnitConversions(self):
"Testing default units during maths"
d1 = D(m=100)
d2 = D(km=1)
d3 = d1 + d2
self.assertEqual(d3._default_unit, 'm')
d4 = d2 + d1
self.assertEqual(d4._default_unit, 'km')
d5 = d1 * 2
self.assertEqual(d5._default_unit, 'm')
d6 = d1 / 2
self.assertEqual(d6._default_unit, 'm')
def testComparisons(self):
"Testing comparisons"
d1 = D(m=100)
d2 = D(km=1)
d3 = D(km=0)
self.assertTrue(d2 > d1)
self.assertTrue(d1 == d1)
self.assertTrue(d1 < d2)
self.assertFalse(d3)
def testUnitsStr(self):
"Testing conversion to strings"
d1 = D(m=100)
d2 = D(km=3.5)
self.assertEqual(str(d1), '100.0 m')
self.assertEqual(str(d2), '3.5 km')
self.assertEqual(repr(d1), 'Distance(m=100.0)')
self.assertEqual(repr(d2), 'Distance(km=3.5)')
def testUnitAttName(self):
"Testing the `unit_attname` class method"
unit_tuple = [('Yard', 'yd'), ('Nautical Mile', 'nm'), ('German legal metre', 'german_m'),
('Indian yard', 'indian_yd'), ('Chain (Sears)', 'chain_sears'), ('Chain', 'chain')]
for nm, att in unit_tuple:
self.assertEqual(att, D.unit_attname(nm))
class AreaTest(unittest.TestCase):
"Testing the Area object"
def testInit(self):
"Testing initialisation from valid units"
a = Area(sq_m=100)
self.assertEqual(a.sq_m, 100)
a = A(sq_m=100)
self.assertEqual(a.sq_m, 100)
a = A(sq_mi=100)
self.assertEqual(a.sq_m, 258998811.0336)
def testInitInvaliA(self):
"Testing initialisation from invalid units"
self.assertRaises(AttributeError, A, banana=100)
def testAccess(self):
"Testing access in different units"
a = A(sq_m=100)
self.assertEqual(a.sq_km, 0.0001)
self.assertAlmostEqual(a.sq_ft, 1076.391, 3)
def testAccessInvaliA(self):
"Testing access in invalid units"
a = A(sq_m=100)
self.assertFalse(hasattr(a, 'banana'))
def testAddition(self):
"Test addition & subtraction"
a1 = A(sq_m=100)
a2 = A(sq_m=200)
a3 = a1 + a2
self.assertEqual(a3.sq_m, 300)
a3 += a1
self.assertEqual(a3.sq_m, 400)
a4 = a1 - a2
self.assertEqual(a4.sq_m, -100)
a4 -= a1
self.assertEqual(a4.sq_m, -200)
with self.assertRaises(TypeError):
a1 + 1
with self.assertRaises(TypeError):
a1 - 1
with self.assertRaises(TypeError):
a1 += 1
with self.assertRaises(TypeError):
a1 -= 1
def testMultiplication(self):
"Test multiplication & division"
a1 = A(sq_m=100)
a3 = a1 * 2
self.assertEqual(a3.sq_m, 200)
a3 = 2 * a1
self.assertEqual(a3.sq_m, 200)
a3 *= 5
self.assertEqual(a3.sq_m, 1000)
a4 = a1 / 2
self.assertEqual(a4.sq_m, 50)
a4 /= 5
self.assertEqual(a4.sq_m, 10)
with self.assertRaises(TypeError):
a1 * A(sq_m=1)
with self.assertRaises(TypeError):
a1 *= A(sq_m=1)
with self.assertRaises(TypeError):
a1 / A(sq_m=1)
with self.assertRaises(TypeError):
a1 /= A(sq_m=1)
def testUnitConversions(self):
"Testing default units during maths"
a1 = A(sq_m=100)
a2 = A(sq_km=1)
a3 = a1 + a2
self.assertEqual(a3._default_unit, 'sq_m')
a4 = a2 + a1
self.assertEqual(a4._default_unit, 'sq_km')
a5 = a1 * 2
self.assertEqual(a5._default_unit, 'sq_m')
a6 = a1 / 2
self.assertEqual(a6._default_unit, 'sq_m')
def testComparisons(self):
"Testing comparisons"
a1 = A(sq_m=100)
a2 = A(sq_km=1)
a3 = A(sq_km=0)
self.assertTrue(a2 > a1)
self.assertTrue(a1 == a1)
self.assertTrue(a1 < a2)
self.assertFalse(a3)
def testUnitsStr(self):
"Testing conversion to strings"
a1 = A(sq_m=100)
a2 = A(sq_km=3.5)
self.assertEqual(str(a1), '100.0 sq_m')
self.assertEqual(str(a2), '3.5 sq_km')
self.assertEqual(repr(a1), 'Area(sq_m=100.0)')
self.assertEqual(repr(a2), 'Area(sq_km=3.5)')
def suite():
s = unittest.TestSuite()
s.addTest(unittest.makeSuite(DistanceTest))
s.addTest(unittest.makeSuite(AreaTest))
return s
def run(verbosity=2):
unittest.TextTestRunner(verbosity=verbosity).run(suite())
if __name__ == "__main__":
run()