# Copyright 2015 Hewlett-Packard Development Company, L.P.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.

import functools

import testtools


def skip_because(*args, **kwargs):
    """A decorator useful to skip tests hitting known bugs

    @param bug: bug number causing the test to skip
    @param condition: optional condition to be True for the skip to have place
    """
    def decorator(f):
        @functools.wraps(f)
        def wrapper(self, *func_args, **func_kwargs):
            skip = False
            if "condition" in kwargs:
                if kwargs["condition"] is True:
                    skip = True
            else:
                skip = True
            if "bug" in kwargs and skip is True:
                if not kwargs['bug'].isdigit():
                    raise ValueError('bug must be a valid bug number')
                msg = "Skipped until Bug: %s is resolved." % kwargs["bug"]
                raise testtools.TestCase.skipException(msg)
            return f(self, *func_args, **func_kwargs)
        return wrapper
    return decorator