#! /usr/bin/env python
######################################################################
# Written by Kevin L. Sitze on 2010-12-03
# This code may be used pursuant to the MIT License.
######################################################################
import sys
import traceback
from types import FloatType, ComplexType
__all__ = (
'assertEquals',
'assertNotEquals',
'assertException',
'assertFalse',
'assertNone',
'assertNotNone',
'assertSame',
'assertNotSame',
'assertTrue'
)
def colon( msg ):
if msg:
return ": " + str( msg )
else:
return ""
def assertEquals( exp, got, msg = None ):
"""assertEquals( exp, got[, message] )
Two objects test as "equal" if:
* they are the same object as tested by the 'is' operator.
* either object is a float or complex number and the absolute
value of the difference between the two is less than 1e-8.
* applying the equals operator ('==') returns True.
"""
if exp is got:
r = True
elif ( type( exp ) in ( FloatType, ComplexType ) or
type( got ) in ( FloatType, ComplexType ) ):
r = abs( exp - got ) < 1e-8
else:
r = ( exp == got )
if not r:
print >>sys.stderr, "Error: expected <%s> but got <%s>%s" % ( repr( exp ), repr( got ), colon( msg ) )
traceback.print_stack()
def assertNotEquals( exp, got, msg = None ):
"""assertNotEquals( exp, got[, message] )
Two objects test as "equal" if:
* they are the same object as tested by the 'is' operator.
* either object is a float or complex number and the absolute
value of the difference between the two is less than 1e-8.
* applying the equals operator ('==') returns True.
"""
if exp is got:
r = False
elif ( type( exp ) in ( FloatType, ComplexType ) or
type( got ) in ( FloatType, ComplexType ) ):
r = abs( exp - got ) >= 1e-8
else:
r = ( exp != got )
if not r:
print >>sys.stderr, "Error: expected different values but both are equal to <%s>%s" % ( repr( exp ), colon( msg ) )
traceback.print_stack()
def assertException( exceptionType, f, msg = None ):
"""Assert that an exception of type \var{exceptionType}
is thrown when the function \var{f} is evaluated.
"""
try:
f()
except exceptionType:
assert True
else:
print >>sys.stderr, "Error: expected <%s> to be thrown by function%s" % ( exceptionType.__name__, colon( msg ) )
traceback.print_stack()
def assertFalse( b, msg = None ):
"""assertFalse( b[, message] )
"""
if b:
print >>sys.stderr, "Error: expected value to be False%s" % colon( msg )
traceback.print_stack()
def assertNone( x, msg = None ):
assertSame( None, x, msg )
def assertNotNone( x, msg = None ):
assertNotSame( None, x, msg )
def assertSame( exp, got, msg = None ):
if got is not exp:
print >>sys.stderr, "Error: expected <%s> to be the same object as <%s>%s" % ( repr( exp ), repr( got ), colon( msg ) )
traceback.print_stack()
def assertNotSame( exp, got, msg = None ):
if got is exp:
print >>sys.stderr, "Error: expected two distinct objects but both are the same object <%s>%s" % ( repr( exp ), colon( msg ) )
traceback.print_stack()
def assertTrue( b, msg = None ):
if not b:
print >>sys.stderr, "Error: expected value to be True%s" % colon( msg )
traceback.print_stack()
if __name__ == "__main__":
assertNone( None )
assertEquals( 5, 5 )
assertException( KeyError, lambda: {}['test'] )
assertNone( 5, 'this assertion is expected' )
assertEquals( 5, 6, 'this assertion is expected' )
assertException( KeyError, lambda: {}, 'this assertion is expected' )
