1994-08-12 13:14:22 +00:00
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import sys
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1997-11-24 22:24:22 +00:00
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import test_support
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1994-08-12 13:14:22 +00:00
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def powtest(type):
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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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1998-03-26 19:42:58 +00:00
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1994-08-12 13:14:22 +00:00
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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)
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pow2=1
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for i in range(0,31):
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1998-03-26 19:42:58 +00:00
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if (pow(2,i)!=pow2):
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1994-08-12 13:14:22 +00:00
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raise ValueError, 'pow(2,'+str(i)+') != '+str(pow2)
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1998-03-26 19:42:58 +00:00
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if (i!=30): pow2=pow2*2
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1994-08-12 13:14:22 +00:00
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print " Testing 3-argument pow() function..."
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il, ih = -20, 20
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jl, jh = -5, 5
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kl, kh = -10, 10
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1997-11-24 22:24:22 +00:00
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compare = cmp
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1994-08-12 13:14:22 +00:00
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if (type==float):
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il=1
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1998-03-26 19:42:58 +00:00
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compare = test_support.fcmp
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1994-08-12 13:14:22 +00:00
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elif (type==int):
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jl=0
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elif (type==long):
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jl,jh = 0, 15
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for i in range(il, ih+1):
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for j in range(jl,jh+1):
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for k in range(kl, kh+1):
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1998-03-26 19:42:58 +00:00
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if (k!=0):
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if compare(pow(type(i),j,k), pow(type(i),j)% type(k)):
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1994-08-12 13:14:22 +00:00
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raise ValueError, "pow(" +str(i)+ "," +str(j)+ \
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1998-03-26 19:42:58 +00:00
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"," +str(k)+ ") != pow(" +str(i)+ "," + \
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str(j)+ ") % " +str(k)
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1994-08-12 13:14:22 +00:00
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print 'Testing integer mode...'
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powtest(int)
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print 'Testing long integer mode...'
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powtest(long)
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print 'Testing floating point mode...'
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powtest(float)
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# Other tests-- not very systematic
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print 'The number in both columns should match.'
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print pow(3,3) % 8, pow(3,3,8)
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print pow(3,3) % -8, pow(3,3,-8)
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print pow(3,2) % -2, pow(3,2,-2)
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print pow(-3,3) % 8, pow(-3,3,8)
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print pow(-3,3) % -8, pow(-3,3,-8)
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print pow(5,2) % -8, pow(5,2,-8)
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print
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print pow(3L,3L) % 8, pow(3L,3L,8)
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print pow(3L,3L) % -8, pow(3L,3L,-8)
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print pow(3L,2) % -2, pow(3L,2,-2)
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print pow(-3L,3L) % 8, pow(-3L,3L,8)
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print pow(-3L,3L) % -8, pow(-3L,3L,-8)
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print pow(5L,2) % -8, pow(5L,2,-8)
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print
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print pow(3.0,3.0) % 8, pow(3.0,3.0,8)
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print pow(3.0,3.0) % -8, pow(3.0,3.0,-8)
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print pow(3.0,2) % -2, pow(3.0,2,-2)
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print pow(5.0,2) % -8, pow(5.0,2,-8)
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print
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for i in range(-10, 11):
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for j in range(0, 6):
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for k in range(-7, 11):
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if (j>=0 and k!=0):
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o=pow(i,j) % k
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n=pow(i,j,k)
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if (o!=n): print 'Integer mismatch:', i,j,k
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if (j>=0 and k<>0):
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o=pow(long(i),j) % k
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n=pow(long(i),j,k)
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if (o!=n): print 'Long mismatch:', i,j,k
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if (i>=0 and k<>0):
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o=pow(float(i),j) % k
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n=pow(float(i),j,k)
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if (o!=n): print 'Float mismatch:', i,j,k
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