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Code Issues Projects Releases Packages Wiki Activity Actions 8

Finish the work on __round__ and __trunc__.

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With Alex Martelli and Keir Mierle.
This commit is contained in:
Guido van Rossum 2007-08-23 22:07:24 +00:00
parent 0f3cff58b2
commit 2fa33db12b
4 changed files with 173 additions and 60 deletions
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42
Lib/test/test_builtin.py
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@ -1440,6 +1440,7 @@ class BuiltinTest(unittest.TestCase):
def test_round(self):
self.assertEqual(round(0.0), 0.0)
self.assertEqual(type(round(0.0)), int)
self.assertEqual(round(1.0), 1.0)
self.assertEqual(round(10.0), 10.0)
self.assertEqual(round(1000000000.0), 1000000000.0)
@ -1468,6 +1469,25 @@ class BuiltinTest(unittest.TestCase):
self.assertEqual(round(-999999999.9), -1000000000.0)
self.assertEqual(round(-8.0, -1), -10.0)
self.assertEqual(type(round(-8.0, -1)), float)
self.assertEqual(type(round(-8.0, 0)), float)
self.assertEqual(type(round(-8.0, 1)), float)
# Check even / odd rounding behaviour
self.assertEqual(round(5.5), 6)
self.assertEqual(round(6.5), 6)
self.assertEqual(round(-5.5), -6)
self.assertEqual(round(-6.5), -6)
# Check behavior on ints
self.assertEqual(round(0), 0)
self.assertEqual(round(8), 8)
self.assertEqual(round(-8), -8)
self.assertEqual(type(round(0)), int)
self.assertEqual(type(round(-8, -1)), float)
self.assertEqual(type(round(-8, 0)), float)
self.assertEqual(type(round(-8, 1)), float)
# test new kwargs
self.assertEqual(round(number=-8.0, ndigits=-1), -10.0)
@ -1487,6 +1507,11 @@ class BuiltinTest(unittest.TestCase):
self.assertRaises(TypeError, round, 1, 2, 3)
self.assertRaises(TypeError, round, TestNoRound())
t = TestNoRound()
t.__round__ = lambda *args: args
self.assertRaises(TypeError, round, t)
self.assertRaises(TypeError, round, t, 0)
def test_setattr(self):
setattr(sys, 'spam', 1)
self.assertEqual(sys.spam, 1)
@ -1529,6 +1554,18 @@ class BuiltinTest(unittest.TestCase):
self.assertRaises(ValueError, sum, BadSeq())
def test_trunc(self):
self.assertEqual(trunc(1), 1)
self.assertEqual(trunc(-1), -1)
self.assertEqual(type(trunc(1)), int)
self.assertEqual(type(trunc(1.5)), int)
self.assertEqual(trunc(1.5), 1)
self.assertEqual(trunc(-1.5), -1)
self.assertEqual(trunc(1.999999), 1)
self.assertEqual(trunc(-1.999999), -1)
self.assertEqual(trunc(-0.999999), -0)
self.assertEqual(trunc(-100.999), -100)
class TestTrunc:
def __trunc__(self):
return 23
@ -1542,6 +1579,11 @@ class BuiltinTest(unittest.TestCase):
self.assertRaises(TypeError, trunc, 1, 2)
self.assertRaises(TypeError, trunc, TestNoTrunc())
t = TestNoTrunc()
t.__trunc__ = lambda *args: args
self.assertRaises(TypeError, trunc, t)
self.assertRaises(TypeError, trunc, t, 0)
def test_tuple(self):
self.assertEqual(tuple(()), ())
t0_3 = (0, 1, 2, 3)