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# Copyright 2016 Google Inc. All Rights Reserved.
#
# 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.
"""Support module for tests for yapf."""
import difflib
import sys
import unittest
from yapf.yapflib import blank_line_calculator
from yapf.yapflib import comment_splicer
from yapf.yapflib import continuation_splicer
from yapf.yapflib import identify_container
from yapf.yapflib import py3compat
from yapf.yapflib import pytree_unwrapper
from yapf.yapflib import pytree_utils
from yapf.yapflib import pytree_visitor
from yapf.yapflib import split_penalty
from yapf.yapflib import style
from yapf.yapflib import subtype_assigner
class YAPFTest(unittest.TestCase):
def __init__(self, *args):
super(YAPFTest, self).__init__(*args)
if not py3compat.PY3:
self.assertRaisesRegex = self.assertRaisesRegexp
def assertCodeEqual(self, expected_code, code):
if code != expected_code:
msg = ['Code format mismatch:', 'Expected:']
linelen = style.Get('COLUMN_LIMIT')
for line in expected_code.splitlines():
if len(line) > linelen:
msg.append('!> %s' % line)
else:
msg.append(' > %s' % line)
msg.append('Actual:')
for line in code.splitlines():
if len(line) > linelen:
msg.append('!> %s' % line)
else:
msg.append(' > %s' % line)
msg.append('Diff:')
msg.extend(
difflib.unified_diff(
code.splitlines(),
expected_code.splitlines(),
fromfile='actual',
tofile='expected',
lineterm=''))
self.fail('\n'.join(msg))
def ParseAndUnwrap(code, dumptree=False):
"""Produces logical lines from the given code.
Parses the code into a tree, performs comment splicing and runs the
unwrapper.
Arguments:
code: code to parse as a string
dumptree: if True, the parsed pytree (after comment splicing) is dumped
to stderr. Useful for debugging.
Returns:
List of logical lines.
"""
tree = pytree_utils.ParseCodeToTree(code)
comment_splicer.SpliceComments(tree)
continuation_splicer.SpliceContinuations(tree)
subtype_assigner.AssignSubtypes(tree)
identify_container.IdentifyContainers(tree)
split_penalty.ComputeSplitPenalties(tree)
blank_line_calculator.CalculateBlankLines(tree)
if dumptree:
pytree_visitor.DumpPyTree(tree, target_stream=sys.stderr)
llines = pytree_unwrapper.UnwrapPyTree(tree)
for lline in llines:
lline.CalculateFormattingInformation()
return llines
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