--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/app/django/contrib/gis/tests/test_measure.py Tue Oct 14 16:00:59 2008 +0000
@@ -0,0 +1,333 @@
+"""
+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.failIf(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)
+
+ try:
+ d5 = d1 + 1
+ except TypeError, e:
+ pass
+ else:
+ self.fail('Distance + number should raise TypeError')
+
+ try:
+ d5 = d1 - 1
+ except TypeError, e:
+ pass
+ else:
+ self.fail('Distance - number should raise TypeError')
+
+ try:
+ d1 += 1
+ except TypeError, e:
+ pass
+ else:
+ self.fail('Distance += number should raise TypeError')
+
+ try:
+ d1 -= 1
+ except TypeError, e:
+ pass
+ else:
+ self.fail('Distance -= number should raise TypeError')
+
+ def testMultiplication(self):
+ "Test multiplication & division"
+ d1 = D(m=100)
+
+ d3 = d1 * 2
+ 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)
+
+ a5 = d1 * D(m=10)
+ self.assert_(isinstance(a5, Area))
+ self.assertEqual(a5.sq_m, 100*10)
+
+ try:
+ d1 *= D(m=1)
+ except TypeError, e:
+ pass
+ else:
+ self.fail('Distance *= Distance should raise TypeError')
+
+ try:
+ d5 = d1 / D(m=1)
+ except TypeError, e:
+ pass
+ else:
+ self.fail('Distance / Distance should raise TypeError')
+
+ try:
+ d1 /= D(m=1)
+ except TypeError, e:
+ pass
+ else:
+ self.fail('Distance /= Distance should raise TypeError')
+
+ 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.assert_(d2 > d1)
+ self.assert_(d1 == d1)
+ self.assert_(d1 < d2)
+ self.failIf(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.failIf(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)
+
+ try:
+ a5 = a1 + 1
+ except TypeError, e:
+ pass
+ else:
+ self.fail('Area + number should raise TypeError')
+
+ try:
+ a5 = a1 - 1
+ except TypeError, e:
+ pass
+ else:
+ self.fail('Area - number should raise TypeError')
+
+ try:
+ a1 += 1
+ except TypeError, e:
+ pass
+ else:
+ self.fail('Area += number should raise TypeError')
+
+ try:
+ a1 -= 1
+ except TypeError, e:
+ pass
+ else:
+ self.fail('Area -= number should raise TypeError')
+
+ def testMultiplication(self):
+ "Test multiplication & division"
+ a1 = A(sq_m=100)
+
+ a3 = a1 * 2
+ 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)
+
+ try:
+ a5 = a1 * A(sq_m=1)
+ except TypeError, e:
+ pass
+ else:
+ self.fail('Area * Area should raise TypeError')
+
+ try:
+ a1 *= A(sq_m=1)
+ except TypeError, e:
+ pass
+ else:
+ self.fail('Area *= Area should raise TypeError')
+
+ try:
+ a5 = a1 / A(sq_m=1)
+ except TypeError, e:
+ pass
+ else:
+ self.fail('Area / Area should raise TypeError')
+
+ try:
+ a1 /= A(sq_m=1)
+ except TypeError, e:
+ pass
+ else:
+ self.fail('Area /= Area should raise TypeError')
+
+ 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.assert_(a2 > a1)
+ self.assert_(a1 == a1)
+ self.assert_(a1 < a2)
+ self.failIf(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()