tahoe-lafs/amdlib/util/assertutil.py

83 lines
3.3 KiB
Python

# Copyright (c) 2003-2006 Bryce "Zooko" Wilcox-O'Hearn
# mailto:zooko@zooko.com
# http://zooko.com/
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this work to deal in this work without restriction (including the
# rights to use, modify, distribute, sublicense, and/or sell copies)
"""
Tests useful in assertion checking, prints out nicely formated messages too.
"""
from humanreadable import hr
from twisted.python import log
def _assert(___cond=False, *___args, **___kwargs):
if ___cond:
return True
msgbuf=[]
if ___args:
msgbuf.append("%s %s" % tuple(map(hr, (___args[0], type(___args[0]),))))
msgbuf.extend([", %s %s" % tuple(map(hr, (arg, type(arg),))) for arg in ___args[1:]])
if ___kwargs:
msgbuf.append(", %s: %s %s" % ((___kwargs.items()[0][0],) + tuple(map(hr, (___kwargs.items()[0][1], type(___kwargs.items()[0][1]),)))))
else:
if ___kwargs:
msgbuf.append("%s: %s %s" % ((___kwargs.items()[0][0],) + tuple(map(hr, (___kwargs.items()[0][1], type(___kwargs.items()[0][1]),)))))
msgbuf.extend([", %s: %s %s" % tuple(map(hr, (k, v, type(v),))) for k, v in ___kwargs.items()[1:]])
raise AssertionError, "".join(msgbuf)
return False
def precondition(___cond=False, *___args, **___kwargs):
try:
if ___cond:
return True
msgbuf=["precondition", ]
if ___args or ___kwargs:
msgbuf.append(": ")
if ___args:
msgbuf.append("%s %s" % tuple(map(hr, (___args[0], type(___args[0]),))))
msgbuf.extend([", %s %s" % tuple(map(hr, (arg, type(arg),))) for arg in ___args[1:]])
if ___kwargs:
msgbuf.append(", %s: %s %s" % ((___kwargs.items()[0][0],) + tuple(map(hr, (___kwargs.items()[0][1], type(___kwargs.items()[0][1]),)))))
else:
if ___kwargs:
msgbuf.append("%s: %s %s" % ((___kwargs.items()[0][0],) + tuple(map(hr, (___kwargs.items()[0][1], type(___kwargs.items()[0][1]),)))))
msgbuf.extend([", %s: %s %s" % tuple(map(hr, (k, v, type(v),))) for k, v in ___kwargs.items()[1:]])
except Exception, le:
log.msg("assertutil.precondition(): INTERNAL ERROR IN pyutil.assertutil. %s %s %s" % (type(le), repr(le), le.args,))
log.err()
raise le
except:
log.msg("assertutil.precondition(): INTERNAL ERROR IN pyutil.assertutil.")
log.err()
raise
raise AssertionError, "".join(msgbuf)
return False
def postcondition(___cond=False, *___args, **___kwargs):
if ___cond:
return True
msgbuf=["postcondition", ]
if ___args or ___kwargs:
msgbuf.append(": ")
if ___args:
msgbuf.append("%s %s" % tuple(map(hr, (___args[0], type(___args[0]),))))
msgbuf.extend([", %s %s" % tuple(map(hr, (arg, type(arg),))) for arg in ___args[1:]])
if ___kwargs:
msgbuf.append(", %s: %s %s" % ((___kwargs.items()[0][0],) + tuple(map(hr, (___kwargs.items()[0][1], type(___kwargs.items()[0][1]),)))))
else:
if ___kwargs:
msgbuf.append("%s: %s %s" % ((___kwargs.items()[0][0],) + tuple(map(hr, (___kwargs.items()[0][1], type(___kwargs.items()[0][1]),)))))
msgbuf.extend([", %s: %s %s" % tuple(map(hr, (k, v, type(v),))) for k, v in ___kwargs.items()[1:]])
raise AssertionError, "".join(msgbuf)
return False