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# -*- coding: utf-8 -*-
# <Lettuce - Behaviour Driven Development for python>
# Copyright (C) <2010-2012> Gabriel Falcão <>
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <>.
import traceback
import sys
from lettuce.strings import utf8_string
class NoDefinitionFound(Exception):
""" Exception raised by lettuce.core.Step, when trying to solve a
Step, but does not find a suitable step definition.
This exception should never blow on user's face. It used merely yo
lettuce can filter undefined steps.
def __init__(self, step):
self.step = step
error = filter(lambda x : 0 <= ord(x) <= 127,
'The step r"%s" is not defined' % self.step.sentence)
super(NoDefinitionFound, self).__init__(error)
class ReasonToFail(object):
""" Exception that contains detailed information about a
AssertionError raised within a step definition. With these data
lettuce show detailed traceback to user in a nice representation.
def __init__(self, step, exc):
self.step = step
self.exception = exc
if sys.version_info[:2] < (2, 6):
msg = exc.message
msg = exc.args[0] if exc.args else ''
if isinstance(msg, basestring):
self.cause = utf8_string(msg)
self.traceback = utf8_string(traceback.format_exc(exc))
class LettuceSyntaxError(SyntaxError):
def __init__(self, filename, string):
self.filename = filename
self.msg = "Syntax error at: %s\n%s\n" % (filename, string)
class StepLoadingError(Exception):
"""Raised when a step cannot be loaded."""
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