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# -*- coding: utf-8; fill-column: 77 -*-
# -*- indent-tabs-mode: nil -*-
# This file is part of pyutil; see README.rst for licensing terms.
"""
Tests useful in assertion checking, prints out nicely formated messages too.
"""
from .humanreadable import hr
def _format_error(prefix, args, kwargs):
if prefix:
msgbuf=[prefix]
if args or kwargs:
msgbuf.append(": ")
else:
msgbuf=[]
if args:
msgbuf.append(", ".join(["%s %s" % tuple(map(hr, (arg, type(arg),))) for arg in args]))
if kwargs:
if args:
msgbuf.append(", ")
msgbuf.append(", ".join(["%s: %s %s" % tuple(map(hr, (k, kwargs[k], type(kwargs[k]),))) for k in sorted(kwargs.keys())]))
return "".join(msgbuf)
def _assert(___cond=False, *args, **kwargs):
if ___cond:
return True
raise AssertionError(_format_error(None, args, kwargs))
def precondition(___cond=False, *args, **kwargs):
if ___cond:
return True
raise AssertionError(_format_error("precondition", args, kwargs))
def postcondition(___cond=False, *args, **kwargs):
if ___cond:
return True
raise AssertionError(_format_error("postcondition", args, kwargs))
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