def testFixedDisplay3(self):
"fixed display < precision rounds properly"
V.ArithmeticClass(
Options(dict(arithmetic='fixed', precision=6, display=6)))
self.assertEqual(str(F(20) / F(3)), '6.666666')
V.ArithmeticClass(
Options(dict(arithmetic='fixed', precision=7, display=6)))
self.assertEqual(str(F(20) / F(3)), '6.666667')
def testG0(self):
"basic equalities"
f1 = F(1)
f2 = F(2)
f3 = F(3)
f7 = F(7)
g1 = G(1)
g2 = G(2)
g3 = G(3)
g7 = G(7)
self.assertEqual(str(f1), str(g1))
self.assertEqual(str(f1/f3), str(g1/g3))
self.assertEqual(str(f2/f3), str(g2/g3))
self.assertEqual(F.mul(f2, f3, round='down'), G.mul(g2, g3, round='down'))
self.assertEqual(F.mul(f2, f3, round='up'), G.mul(g2, g3, round='up'))
self.assertEqual(F.div(f2, f3, round='down'), G.div(g2, g3, round='down'))
self.assertEqual(F.div(f2, f3, round='up'), G.div(g2, g3, round='up'))
self.assertEqual(F.muldiv(f2, f3, f7, round='down'), G.muldiv(g2, g3, g7, round='down'))
self.assertEqual(F.muldiv(f2, f3, f7, round='up'), G.muldiv(g2, g3, g7, round='up'))
def testFixed6(self):
"simple assertions"
self.assertEqual(self.A.name, 'fixed') # Fixed.name
self.assertEqual(self.A.exact, False) # Fixed.exact
self.assertEqual(self.A.precision, self.p) # Fixed.precision
self.assertEqual(self.A._Fixed__scale, 10**self.p) # Fixed.__scale
self.assertEqual(self.A(0)._value, 0) # 0
self.assertEqual(self.A(1)._value, 10**self.p) # 1
self.assertEqual(self.A(100)._value, 100*10**self.p) # 100
self.assertEqual((self.A(1)/self.A(10))._value, 10**(self.p-1)) # 1/10
x = self.A(1)
y = self.A(2)
self.assertEqual(-x, x-y)
self.assertEqual(+x, y-x)
self.assertEqual(abs(x-y), x)
self.assertEqual(y/1, y/x)
self.assertRaises(ValueError, self.A.mul, x, y, 'bad')
self.assertRaises(ValueError, self.A.muldiv, x, y, y, 'bad')
f13 = F(1)/F(3)
f15 = F(1)/F(5)
f17 = F(1)/F(7)
self.assertTrue(F.muldiv(f13, f15, f17, round='down') > f13*f15/f17)
self.assertTrue(F.muldiv(f13, f15, f17, round='up') > F.muldiv(f13, f15, f17, round='down'))
self.assertEqual(str(f13*f15/f17), '0.466662')
self.assertEqual(str(F.muldiv(f13, f15, f17, round='down')), '0.466666')
self.assertEqual(str(F.muldiv(f13, f15, f17, round='up')), '0.466667')
self.assertTrue(x != y)
self.assertEqual(str(x/y), '0.500000')
def testRoundNone(self):
"round= must be present"
self.assertRaises(ValueError, F.div, F(1), F(3))
def testRoundBad(self):
"round= must be up or down"
self.assertRaises(ValueError, F.div, F(1), F(3), round='bad')
def testRoundUpExact(self):
"up is bigger by an epsilon but not if exact result"
self.assertEqual(F.div(F(2), F(4), round='up')._value, 500)
def testRoundDownExact(self):
"no rounding if exact result"
self.assertEqual(F.div(F(2), F(4), round='down')._value, 500)
def testRoundUp(self):
"up is bigger by an epsilon"
self.assertEqual(F.div(F(1), F(3), round='up')._value, 334)
def testRoundDown(self):
"down is same as default"
self.assertEqual(F.div(F(1), F(3), round='down')._value, 333)
def testRoundFloor(self):
"default rounding is truncation/floor"
self.assertEqual((F(1)/F(3))._value, 333)
def testFixed0(self):
"simple assertions"
self.assertEqual(self.A.name, 'integer') # Fixed.name
x = F(1)
self.assertEqual(str(x), '1')