diff options
Diffstat (limited to 'Lib/test/test_pow.py')
| -rw-r--r-- | Lib/test/test_pow.py | 85 |
1 files changed, 55 insertions, 30 deletions
diff --git a/Lib/test/test_pow.py b/Lib/test/test_pow.py index 6e3dda7fae..22c19721fe 100644 --- a/Lib/test/test_pow.py +++ b/Lib/test/test_pow.py @@ -2,44 +2,69 @@ import sys import test_support def powtest(type): - if (type!=float): + if type != float: print " Testing 2-argument pow() function..." for i in range(-1000, 1000): - if (pow(type(i),0)!=1): + if pow(type(i), 0) != 1: raise ValueError, 'pow('+str(i)+',0) != 1' - if (pow(type(i),1)!=type(i)): + if pow(type(i), 1) != type(i): raise ValueError, 'pow('+str(i)+',1) != '+str(i) - if (pow(type(0),1)!=type(0)): + if pow(type(0), 1) != type(0): raise ValueError, 'pow(0,'+str(i)+') != 0' - if (pow(type(1),1)!=type(1)): + 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): + if pow(type(i), 3) != i*i*i: raise ValueError, 'pow('+str(i)+',3) != '+str(i*i*i) - pow2=1 + pow2 = 1 for i in range(0,31): - if (pow(2,i)!=pow2): + if pow(2, i) != pow2: raise ValueError, 'pow(2,'+str(i)+') != '+str(pow2) - if (i!=30): pow2=pow2*2 + if i != 30 : pow2 = pow2*2 + + for othertype in int, long: + for i in range(-10, 0) + range(1, 10): + ii = type(i) + for j in range(1, 11): + jj = -othertype(j) + try: + pow(ii, jj) + except ValueError: + pass # taking an int to a neg int power should fail + else: + raise ValueError, "pow(%s, %s) did not fail" % (ii, jj) + + for othertype in int, long, float: + for i in range(1, 100): + zero = type(0) + exp = -othertype(i/10.0) + if exp == 0: + continue + try: + pow(zero, exp) + except ZeroDivisionError: + pass # taking zero to any negative exponent should fail + else: + raise ValueError, "pow(%s, %s) did not fail" % (zero, exp) print " Testing 3-argument pow() function..." il, ih = -20, 20 jl, jh = -5, 5 kl, kh = -10, 10 compare = cmp - if (type==float): - il=1 + if type == float: + il = 1 compare = test_support.fcmp - elif (type==int): - jl=0 - elif (type==long): - jl,jh = 0, 15 + 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 j in range(jl, jh+1): for k in range(kl, kh+1): - if (k!=0): + if k != 0: if compare(pow(type(i),j,k), pow(type(i),j)% type(k)): raise ValueError, "pow(" +str(i)+ "," +str(j)+ \ "," +str(k)+ ") != pow(" +str(i)+ "," + \ @@ -81,15 +106,15 @@ 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 + 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 |