| import sys |
| |
| def powtest(type): |
| if (type!=float): |
| print " Testing 2-argument pow() function..." |
| for i in range(-1000, 1000): |
| if (pow(type(i),0)!=1): |
| raise ValueError, 'pow('+str(i)+',0) != 1' |
| if (pow(type(i),1)!=type(i)): |
| raise ValueError, 'pow('+str(i)+',1) != '+str(i) |
| if (pow(type(0),1)!=type(0)): |
| raise ValueError, 'pow(0,'+str(i)+') != 0' |
| if (pow(type(1),1)!=type(1)): |
| raise ValueError, 'pow(1,'+str(i)+') != 1' |
| |
| for i in range(-100, 100): |
| if (pow(type(i),3)!=i*i*i): |
| raise ValueError, 'pow('+str(i)+',3) != '+str(i*i*i) |
| |
| pow2=1 |
| for i in range(0,31): |
| if (pow(2,i)!=pow2): |
| raise ValueError, 'pow(2,'+str(i)+') != '+str(pow2) |
| if (i!=30): pow2=pow2*2 |
| |
| print " Testing 3-argument pow() function..." |
| il, ih = -20, 20 |
| jl, jh = -5, 5 |
| kl, kh = -10, 10 |
| if (type==float): |
| il=1 |
| elif (type==int): |
| jl=0 |
| elif (type==long): |
| jl,jh = 0, 15 |
| for i in range(il, ih+1): |
| for j in range(jl,jh+1): |
| for k in range(kl, kh+1): |
| if (k!=0): |
| if (pow(type(i),j,k)!=pow(type(i),j)% type(k) ): |
| raise ValueError, "pow(" +str(i)+ "," +str(j)+ \ |
| "," +str(k)+ ") != pow(" +str(i)+ "," + \ |
| str(j)+ ") % " +str(k) |
| |
| |
| print 'Testing integer mode...' |
| powtest(int) |
| print 'Testing long integer mode...' |
| powtest(long) |
| print 'Testing floating point mode...' |
| powtest(float) |
| |
| # Other tests-- not very systematic |
| |
| print 'The number in both columns should match.' |
| print pow(3,3) % 8, pow(3,3,8) |
| print pow(3,3) % -8, pow(3,3,-8) |
| print pow(3,2) % -2, pow(3,2,-2) |
| print pow(-3,3) % 8, pow(-3,3,8) |
| print pow(-3,3) % -8, pow(-3,3,-8) |
| print pow(5,2) % -8, pow(5,2,-8) |
| print |
| |
| print pow(3L,3L) % 8, pow(3L,3L,8) |
| print pow(3L,3L) % -8, pow(3L,3L,-8) |
| print pow(3L,2) % -2, pow(3L,2,-2) |
| print pow(-3L,3L) % 8, pow(-3L,3L,8) |
| print pow(-3L,3L) % -8, pow(-3L,3L,-8) |
| print pow(5L,2) % -8, pow(5L,2,-8) |
| print |
| |
| print pow(3.0,3.0) % 8, pow(3.0,3.0,8) |
| print pow(3.0,3.0) % -8, pow(3.0,3.0,-8) |
| print pow(3.0,2) % -2, pow(3.0,2,-2) |
| print pow(5.0,2) % -8, pow(5.0,2,-8) |
| print |
| |
| for i in range(-10, 11): |
| for j in range(0, 6): |
| for k in range(-7, 11): |
| if (j>=0 and k!=0): |
| o=pow(i,j) % k |
| n=pow(i,j,k) |
| if (o!=n): print 'Integer mismatch:', i,j,k |
| if (j>=0 and k<>0): |
| o=pow(long(i),j) % k |
| n=pow(long(i),j,k) |
| if (o!=n): print 'Long mismatch:', i,j,k |
| if (i>=0 and k<>0): |
| o=pow(float(i),j) % k |
| n=pow(float(i),j,k) |
| if (o!=n): print 'Float mismatch:', i,j,k |