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Port test_pow.py to PyUnit. From SF patch #662807
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Lines changed: 110 additions & 149 deletions

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‎Lib/test/output/test_pow‎

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‎Lib/test/test_pow.py‎

Lines changed: 110 additions & 124 deletions
Original file line numberDiff line numberDiff line change
@@ -1,125 +1,111 @@
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import sys
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from test import test_support
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def powtest(type):
6-
if type != float:
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print " Testing 2-argument pow() function..."
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for i in range(-1000, 1000):
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if pow(type(i), 0) != 1:
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raise ValueError, 'pow('+str(i)+',0) != 1'
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if pow(type(i), 1) != type(i):
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raise ValueError, 'pow('+str(i)+',1) != '+str(i)
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if pow(type(0), 1) != type(0):
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raise ValueError, 'pow(0,'+str(i)+') != 0'
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if pow(type(1), 1) != type(1):
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raise ValueError, 'pow(1,'+str(i)+') != 1'
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for i in range(-100, 100):
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if pow(type(i), 3) != i*i*i:
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raise ValueError, 'pow('+str(i)+',3) != '+str(i*i*i)
21-
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pow2 = 1
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for i in range(0,31):
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if pow(2, i) != pow2:
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raise ValueError, 'pow(2,'+str(i)+') != '+str(pow2)
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if i != 30 : pow2 = pow2*2
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for othertype in int, long:
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for i in range(-10, 0) + range(1, 10):
30-
ii = type(i)
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for j in range(1, 11):
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jj = -othertype(j)
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try:
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import test.test_support, unittest
2+
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class PowTest(unittest.TestCase):
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5+
def powtest(self, type):
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if type != float:
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for i in range(-1000, 1000):
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self.assertEquals(pow(type(i), 0), 1)
9+
self.assertEquals(pow(type(i), 1), type(i))
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self.assertEquals(pow(type(0), 1), type(0))
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self.assertEquals(pow(type(1), 1), type(1))
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for i in range(-100, 100):
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self.assertEquals(pow(type(i), 3), i*i*i)
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pow2 = 1
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for i in range(0,31):
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self.assertEquals(pow(2, i), pow2)
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if i != 30 : pow2 = pow2*2
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for othertype in int, long:
22+
for i in range(-10, 0) + range(1, 10):
23+
ii = type(i)
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for j in range(1, 11):
25+
jj = -othertype(j)
3426
pow(ii, jj)
35-
except ValueError:
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raise ValueError, "pow(%s, %s) failed" % (ii, jj)
37-
38-
for othertype in int, long, float:
39-
for i in range(1, 100):
40-
zero = type(0)
41-
exp = -othertype(i/10.0)
42-
if exp == 0:
43-
continue
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try:
45-
pow(zero, exp)
46-
except ZeroDivisionError:
47-
pass # taking zero to any negative exponent should fail
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else:
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raise ValueError, "pow(%s, %s) did not fail" % (zero, exp)
50-
51-
print " Testing 3-argument pow() function..."
52-
il, ih = -20, 20
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jl, jh = -5, 5
54-
kl, kh = -10, 10
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compare = cmp
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if type == float:
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il = 1
58-
compare = test_support.fcmp
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elif type == int:
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jl = 0
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elif type == long:
62-
jl, jh = 0, 15
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for i in range(il, ih+1):
64-
for j in range(jl, jh+1):
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for k in range(kl, kh+1):
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if k != 0:
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if type == float or j < 0:
68-
try:
69-
pow(type(i),j,k)
70-
except TypeError:
71-
pass
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else:
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raise ValueError, "expected TypeError from " + \
74-
"pow%r" % ((type(i), j, k),)
75-
continue
76-
if compare(pow(type(i),j,k), pow(type(i),j)% type(k)):
77-
raise ValueError, "pow(" +str(i)+ "," +str(j)+ \
78-
"," +str(k)+ ") != pow(" +str(i)+ "," + \
79-
str(j)+ ") % " +str(k)
80-
81-
82-
print 'Testing integer mode...'
83-
powtest(int)
84-
print 'Testing long integer mode...'
85-
powtest(long)
86-
print 'Testing floating point mode...'
87-
powtest(float)
88-
89-
# Other tests-- not very systematic
90-
91-
print 'The number in both columns should match.'
92-
print `pow(3,3) % 8`, `pow(3,3,8)`
93-
print `pow(3,3) % -8`, `pow(3,3,-8)`
94-
print `pow(3,2) % -2`, `pow(3,2,-2)`
95-
print `pow(-3,3) % 8`, `pow(-3,3,8)`
96-
print `pow(-3,3) % -8`, `pow(-3,3,-8)`
97-
print `pow(5,2) % -8`, `pow(5,2,-8)`
98-
print
99-
100-
print `pow(3L,3L) % 8`, `pow(3L,3L,8)`
101-
print `pow(3L,3L) % -8`, `pow(3L,3L,-8)`
102-
print `pow(3L,2) % -2`, `pow(3L,2,-2)`
103-
print `pow(-3L,3L) % 8`, `pow(-3L,3L,8)`
104-
print `pow(-3L,3L) % -8`, `pow(-3L,3L,-8)`
105-
print `pow(5L,2) % -8`, `pow(5L,2,-8)`
106-
print
107-
108-
print
109-
110-
for i in range(-10, 11):
111-
for j in range(0, 6):
112-
for k in range(-7, 11):
113-
if j >= 0 and k != 0:
114-
o = pow(i,j) % k
115-
n = pow(i,j,k)
116-
if o != n: print 'Integer mismatch:', i,j,k
117-
if j >= 0 and k != 0:
118-
o = pow(long(i),j) % k
119-
n = pow(long(i),j,k)
120-
if o != n: print 'Integer mismatch:', i,j,k
121-
122-
class TestRpow:
123-
def __rpow__(self, other):
124-
return None
125-
None ** TestRpow() # Won't fail when __rpow__ invoked. SF bug #643260.
27+
28+
for othertype in int, long, float:
29+
for i in range(1, 100):
30+
zero = type(0)
31+
exp = -othertype(i/10.0)
32+
if exp == 0:
33+
continue
34+
self.assertRaises(ZeroDivisionError, pow, zero, exp)
35+
36+
il, ih = -20, 20
37+
jl, jh = -5, 5
38+
kl, kh = -10, 10
39+
asseq = self.assertEqual
40+
if type == float:
41+
il = 1
42+
asseq = self.assertAlmostEqual
43+
elif type == int:
44+
jl = 0
45+
elif type == long:
46+
jl, jh = 0, 15
47+
for i in range(il, ih+1):
48+
for j in range(jl, jh+1):
49+
for k in range(kl, kh+1):
50+
if k != 0:
51+
if type == float or j < 0:
52+
self.assertRaises(TypeError, pow, type(i), j, k)
53+
continue
54+
asseq(
55+
pow(type(i),j,k),
56+
pow(type(i),j)% type(k)
57+
)
58+
59+
def test_powint(self):
60+
self.powtest(int)
61+
62+
def test_powlong(self):
63+
self.powtest(long)
64+
65+
def test_powfloat(self):
66+
self.powtest(float)
67+
68+
def test_other(self):
69+
# Other tests-- not very systematic
70+
self.assertEquals(pow(3,3) % 8, pow(3,3,8))
71+
self.assertEquals(pow(3,3) % -8, pow(3,3,-8))
72+
self.assertEquals(pow(3,2) % -2, pow(3,2,-2))
73+
self.assertEquals(pow(-3,3) % 8, pow(-3,3,8))
74+
self.assertEquals(pow(-3,3) % -8, pow(-3,3,-8))
75+
self.assertEquals(pow(5,2) % -8, pow(5,2,-8))
76+
77+
self.assertEquals(pow(3L,3L) % 8, pow(3L,3L,8))
78+
self.assertEquals(pow(3L,3L) % -8, pow(3L,3L,-8))
79+
self.assertEquals(pow(3L,2) % -2, pow(3L,2,-2))
80+
self.assertEquals(pow(-3L,3L) % 8, pow(-3L,3L,8))
81+
self.assertEquals(pow(-3L,3L) % -8, pow(-3L,3L,-8))
82+
self.assertEquals(pow(5L,2) % -8, pow(5L,2,-8))
83+
84+
for i in range(-10, 11):
85+
for j in range(0, 6):
86+
for k in range(-7, 11):
87+
if j >= 0 and k != 0:
88+
self.assertEquals(
89+
pow(i,j) % k,
90+
pow(i,j,k)
91+
)
92+
if j >= 0 and k != 0:
93+
self.assertEquals(
94+
pow(long(i),j) % k,
95+
pow(long(i),j,k)
96+
)
97+
98+
def test_bug643260(self):
99+
class TestRpow:
100+
def __rpow__(self, other):
101+
return None
102+
None ** TestRpow() # Won't fail when __rpow__ invoked. SF bug #643260.
103+
104+
105+
def test_main():
106+
suite = unittest.TestSuite()
107+
suite.addTest(unittest.makeSuite(PowTest))
108+
test.test_support.run_suite(suite)
109+
110+
if __name__ == "__main__":
111+
test_main()

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