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304 lines
8.0 KiB
Python
304 lines
8.0 KiB
Python
"""
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Distance and Area objects to allow for sensible and convenient calculation
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and conversions. Here are some tests.
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"""
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import unittest
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from django.contrib.gis.measure import A, Area, D, Distance
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from django.test import SimpleTestCase
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class DistanceTest(SimpleTestCase):
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"Testing the Distance object"
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def test_init(self):
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"Testing initialization 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 test_init_invalid(self):
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"Testing initialization from invalid units"
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with self.assertRaises(AttributeError):
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D(banana=100)
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def test_access(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 test_access_invalid(self):
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"Testing access in invalid units"
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d = D(m=100)
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self.assertFalse(hasattr(d, "banana"))
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def test_addition(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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with self.assertRaises(TypeError):
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d1 + 1
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with self.assertRaises(TypeError):
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d1 - 1
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with self.assertRaises(TypeError):
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d1 += 1
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with self.assertRaises(TypeError):
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d1 -= 1
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def test_multiplication(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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d5 = d1 / D(m=2)
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self.assertEqual(d5, 50)
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a5 = d1 * D(m=10)
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self.assertIsInstance(a5, Area)
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self.assertEqual(a5.sq_m, 100 * 10)
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with self.assertRaises(TypeError):
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d1 *= D(m=1)
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with self.assertRaises(TypeError):
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d1 /= D(m=1)
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def test_unit_conversions(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 test_comparisons(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.assertGreater(d2, d1)
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self.assertEqual(d1, d1)
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self.assertLess(d1, d2)
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self.assertFalse(d3)
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def test_units_str(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 test_furlong(self):
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d = D(m=201.168)
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self.assertEqual(d.furlong, 1)
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def test_unit_att_name(self):
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"Testing the `unit_attname` class method"
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unit_tuple = [
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("Yard", "yd"),
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("Nautical Mile", "nm"),
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("German legal metre", "german_m"),
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("Indian yard", "indian_yd"),
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("Chain (Sears)", "chain_sears"),
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("Chain", "chain"),
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("Furrow Long", "furlong"),
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]
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for nm, att in unit_tuple:
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with self.subTest(nm=nm):
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self.assertEqual(att, D.unit_attname(nm))
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def test_unit_att_name_invalid(self):
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msg = "Unknown unit type: invalid-unit-name"
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with self.assertRaisesMessage(AttributeError, msg):
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D.unit_attname("invalid-unit-name")
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with self.assertRaisesMessage(AttributeError, msg):
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A.unit_attname("invalid-unit-name")
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def test_hash(self):
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d1 = D(m=99)
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d2 = D(m=100)
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d3 = D(km=0.1)
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self.assertEqual(hash(d2), hash(d3))
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self.assertNotEqual(hash(d1), hash(d2))
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self.assertNotEqual(hash(d1), hash(d3))
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class AreaTest(unittest.TestCase):
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"Testing the Area object"
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def test_init(self):
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"Testing initialization 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 test_init_invalid_a(self):
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"Testing initialization from invalid units"
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with self.assertRaises(AttributeError):
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A(banana=100)
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def test_access(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 test_access_invalid_a(self):
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"Testing access in invalid units"
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a = A(sq_m=100)
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self.assertFalse(hasattr(a, "banana"))
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def test_addition(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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with self.assertRaises(TypeError):
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a1 + 1
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with self.assertRaises(TypeError):
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a1 - 1
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with self.assertRaises(TypeError):
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a1 += 1
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with self.assertRaises(TypeError):
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a1 -= 1
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def test_multiplication(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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with self.assertRaises(TypeError):
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a1 * A(sq_m=1)
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with self.assertRaises(TypeError):
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a1 *= A(sq_m=1)
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with self.assertRaises(TypeError):
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a1 / A(sq_m=1)
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with self.assertRaises(TypeError):
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a1 /= A(sq_m=1)
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def test_unit_conversions(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 test_comparisons(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.assertGreater(a2, a1)
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self.assertEqual(a1, a1)
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self.assertLess(a1, a2)
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self.assertFalse(a3)
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def test_units_str(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 test_hash(self):
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a1 = A(sq_m=100)
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a2 = A(sq_m=1000000)
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a3 = A(sq_km=1)
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self.assertEqual(hash(a2), hash(a3))
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self.assertNotEqual(hash(a1), hash(a2))
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self.assertNotEqual(hash(a1), hash(a3))
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