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