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# 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.
"""Handling of lists of tests - common code to --load-list etc."""
import io
try:
from subunit import ByteStreamToStreamResult as bytestream_to_streamresult
except ImportError:
bytestream_to_streamresult = None
try:
from testtools.testresult.doubles import StreamResult as stream_result
except ImportError:
stream_result = None
def write_list(stream, test_ids):
"""Write test_ids out to stream.
:param stream: A file-like object.
:param test_ids: An iterable of test ids.
"""
# May need utf8 explicitly?
stream.write(bytes(("\n".join(list(test_ids) + [""])).encode("utf8")))
def parse_list(list_bytes):
"""Parse list_bytes into a list of test ids."""
return _v1(list_bytes)
def parse_enumeration(enumeration_bytes):
"""Parse enumeration_bytes into a list of test_ids."""
# If subunit v2 is available, use it.
if bytestream_to_streamresult is not None:
return _v2(enumeration_bytes)
else:
return _v1(enumeration_bytes)
def _v1(list_bytes):
return [id.strip() for id in list_bytes.decode("utf8").split("\n") if id.strip()]
def _v2(list_bytes):
parser = bytestream_to_streamresult(
io.BytesIO(list_bytes), non_subunit_name="stdout"
)
result = stream_result()
parser.run(result)
return [event[1] for event in result._events if event[2] == "exists"]
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