Added test for math module

3 files changed, 183 insertions, 0 deletions

diff --git a/Lib/test/test_math.py b/Lib/test/test_math.py
new file mode 100644
index 0000000..af84d2a
--- /dev/null
+++ b/Lib/test/test_math.py
@@ -0,0 +1,153 @@
+# Python test set -- math module
+# XXXX Should not do tests around zero only
+
+from test_support import *
+
+eps=1e-5
+print 'math module, testing with eps', eps
+import math
+
+def testit(name, value, expected):
+	if abs(value-expected) > eps:
+		raise TestFailed, '%s returned %f, expected %f'%\
+		      (name, value, expected)
+
+print 'constants'
+testit('pi', math.pi, 3.1415926)
+testit('e', math.e, 2.7182818)
+
+print 'acos'
+testit('acos(-1)', math.acos(-1), math.pi)
+testit('acos(0)', math.acos(0), math.pi/2)
+testit('acos(1)', math.acos(1), 0)
+
+print 'asin'
+testit('asin(-1)', math.asin(-1), -math.pi/2)
+testit('asin(0)', math.asin(0), 0)
+testit('asin(1)', math.asin(1), math.pi/2)
+
+print 'atan'
+testit('atan(-1)', math.atan(-1), -math.pi/4)
+testit('atan(0)', math.atan(0), 0)
+testit('atan(1)', math.atan(1), math.pi/4)
+
+print 'atan2'
+testit('atan2(-1, 0)', math.atan2(-1, 0), -math.pi/2)
+testit('atan2(-1, 1)', math.atan2(-1, 1), -math.pi/4)
+testit('atan2(0, 1)', math.atan2(0, 1), 0)
+testit('atan2(1, 1)', math.atan2(1, 1), math.pi/4)
+testit('atan2(1, 0)', math.atan2(1, 0), math.pi/2)
+
+print 'ceil'
+testit('ceil(0.5)', math.ceil(0.5), 1)
+testit('ceil(1.0)', math.ceil(1.0), 1)
+testit('ceil(1.5)', math.ceil(1.5), 2)
+testit('ceil(-0.5)', math.ceil(-0.5), 0)
+testit('ceil(-1.0)', math.ceil(-1.0), -1)
+testit('ceil(-1.5)', math.ceil(-1.5), -1)
+
+print 'cos'
+testit('cos(-pi/2)', math.cos(-math.pi/2), 0)
+testit('cos(0)', math.cos(0), 1)
+testit('cos(pi/2)', math.cos(math.pi/2), 0)
+testit('cos(pi)', math.cos(math.pi), -1)
+
+print 'cosh'
+testit('cosh(0)', math.cosh(0), 1)
+testit('cosh(2)-2*cosh(1)**2', math.cosh(2)-2*math.cosh(1)**2, -1) # Thanks to Lambert
+
+print 'exp'
+testit('exp(-1)', math.exp(-1), 1/math.e)
+testit('exp(0)', math.exp(0), 1)
+testit('exp(1)', math.exp(1), math.e)
+
+print 'fabs'
+testit('fabs(-1)', math.fabs(-1), 1)
+testit('fabs(0)', math.fabs(0), 0)
+testit('fabs(1)', math.fabs(1), 1)
+
+print 'floor'
+testit('floor(0.5)', math.floor(0.5), 0)
+testit('floor(1.0)', math.floor(1.0), 1)
+testit('floor(1.5)', math.floor(1.5), 1)
+testit('floor(-0.5)', math.floor(-0.5), -1)
+testit('floor(-1.0)', math.floor(-1.0), -1)
+testit('floor(-1.5)', math.floor(-1.5), -2)
+
+print 'fmod'
+testit('fmod(10,1)', math.fmod(10,1), 0)
+testit('fmod(10,0.5)', math.fmod(10,0.5), 0)
+testit('fmod(10,1.5)', math.fmod(10,1.5), 1)
+testit('fmod(-10,1)', math.fmod(-10,1), 0)
+testit('fmod(-10,0.5)', math.fmod(-10,0.5), 0)
+testit('fmod(-10,1.5)', math.fmod(-10,1.5), -1)
+
+print 'frexp'
+def testfrexp(name, (mant, exp), (emant, eexp)):
+	if abs(mant-emant) > eps or exp <> eexp:
+		raise TestFailed, '%s returned %s, expected %s'%\
+		      (name, `mant, exp`, `emant,eexp`)
+
+testfrexp('frexp(-1)', math.frexp(-1), (-0.5, 1))
+testfrexp('frexp(0)', math.frexp(0), (0, 0))
+testfrexp('frexp(1)', math.frexp(1), (0.5, 1))
+testfrexp('frexp(2)', math.frexp(2), (0.5, 2))
+
+print 'hypot'
+testit('hypot(0,0)', math.hypot(0,0), 0)
+testit('hypot(3,4)', math.hypot(3,4), 5)
+
+print 'ldexp'
+testit('ldexp(0,1)', math.ldexp(0,1), 0)
+testit('ldexp(1,1)', math.ldexp(1,1), 2)
+testit('ldexp(1,-1)', math.ldexp(1,-1), 0.5)
+testit('ldexp(-1,1)', math.ldexp(-1,1), -2)
+
+print 'log'
+testit('log(1/e)', math.log(1/math.e), -1)
+testit('log(1)', math.log(1), 0)
+testit('log(e)', math.log(math.e), 1)
+
+print 'log10'
+testit('log10(0.1)', math.log10(0.1), -1)
+testit('log10(1)', math.log10(1), 0)
+testit('log10(10)', math.log10(10), 1)
+
+print 'modf'
+def testmodf(name, (v1, v2), (e1, e2)):
+	if abs(v1-e1) > eps or abs(v2-e2):
+		raise TestFailed, '%s returned %s, expected %s'%\
+		      (name, `v1,v2`, `e1,e2`)
+
+testmodf('modf(1.5)', math.modf(1.5), (0.5, 1.0))
+testmodf('modf(-1.5)', math.modf(-1.5), (-0.5, -1.0))
+
+print 'pow'
+testit('pow(0,1)', math.pow(0,1), 0)
+testit('pow(1,0)', math.pow(1,0), 1)
+testit('pow(2,1)', math.pow(2,1), 2)
+testit('pow(2,-1)', math.pow(2,-1), 0.5)
+
+print 'sin'
+testit('sin(0)', math.sin(0), 0)
+testit('sin(pi/2)', math.sin(math.pi/2), 1)
+testit('sin(-pi/2)', math.sin(-math.pi/2), -1)
+
+print 'sinh'
+testit('sinh(0)', math.sinh(0), 0)
+testit('sinh(1)**2-cosh(1)**2', math.sinh(1)**2-math.cosh(1)**2, -1)
+testit('sinh(1)+sinh(-1)', math.sinh(1)+math.sinh(-1), 0)
+
+print 'sqrt'
+testit('sqrt(0)', math.sqrt(0), 0)
+testit('sqrt(1)', math.sqrt(1), 1)
+testit('sqrt(4)', math.sqrt(4), 2)
+
+print 'tan'
+testit('tan(0)', math.tan(0), 0)
+testit('tan(pi/4)', math.tan(math.pi/4), 1)
+testit('tan(-pi/4)', math.tan(-math.pi/4), -1)
+
+print 'tanh'
+testit('tanh(0)', math.tanh(0), 0)
+testit('tanh(1)+tanh(-1)', math.tanh(1)+math.tanh(-1), 0)
diff --git a/Lib/test/testall.out b/Lib/test/testall.out
index e69df95..9d210a2 100644
--- a/Lib/test/testall.out
+++ b/Lib/test/testall.out
@@ -138,4 +138,30 @@ test_types
 6.5.3 Lists
 6.5.3a Additional list operations
 6.6 Mappings == Dictionaries
+test_math
+math module, testing with eps 1e-05
+constants
+acos
+asin
+atan
+atan2
+ceil
+cos
+cosh
+exp
+fabs
+floor
+fmod
+frexp
+hypot
+ldexp
+log
+log10
+modf
+pow
+sin
+sinh
+sqrt
+tan
+tanh
 Passed all tests.
diff --git a/Lib/test/testall.py b/Lib/test/testall.py
index 92e7b9f..6733a2c 100644
--- a/Lib/test/testall.py
+++ b/Lib/test/testall.py
@@ -29,4 +29,8 @@ print 'test_types'
 unload('test_types')
 import test_types
 
+print 'test_math'
+unload('test_math')
+import test_math
+
 print 'Passed all tests.'