diff options
Diffstat (limited to 'Lib')
| -rw-r--r-- | Lib/test/test_pow.py | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/Lib/test/test_pow.py b/Lib/test/test_pow.py new file mode 100644 index 0000000..03f7314 --- /dev/null +++ b/Lib/test/test_pow.py @@ -0,0 +1,92 @@ +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 |