yapftests/format_token_test.py

# Copyright 2015 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.
"""Tests for yapf.format_token."""

import unittest
from lib2to3 import pytree
from lib2to3.pgen2 import token

from yapf.yapflib import format_token


class TabbedContinuationAlignPaddingTest(unittest.TestCase):

  def testSpace(self):
    align_style = 'SPACE'

    pad = format_token._TabbedContinuationAlignPadding(0, align_style, 2)
    self.assertEqual(pad, '')

    pad = format_token._TabbedContinuationAlignPadding(2, align_style, 2)
    self.assertEqual(pad, ' ' * 2)

    pad = format_token._TabbedContinuationAlignPadding(5, align_style, 2)
    self.assertEqual(pad, ' ' * 5)

  def testFixed(self):
    align_style = 'FIXED'

    pad = format_token._TabbedContinuationAlignPadding(0, align_style, 4)
    self.assertEqual(pad, '')

    pad = format_token._TabbedContinuationAlignPadding(2, align_style, 4)
    self.assertEqual(pad, '\t')

    pad = format_token._TabbedContinuationAlignPadding(5, align_style, 4)
    self.assertEqual(pad, '\t' * 2)

  def testVAlignRight(self):
    align_style = 'VALIGN-RIGHT'

    pad = format_token._TabbedContinuationAlignPadding(0, align_style, 4)
    self.assertEqual(pad, '')

    pad = format_token._TabbedContinuationAlignPadding(2, align_style, 4)
    self.assertEqual(pad, '\t')

    pad = format_token._TabbedContinuationAlignPadding(4, align_style, 4)
    self.assertEqual(pad, '\t')

    pad = format_token._TabbedContinuationAlignPadding(5, align_style, 4)
    self.assertEqual(pad, '\t' * 2)


class FormatTokenTest(unittest.TestCase):

  def testSimple(self):
    tok = format_token.FormatToken(
        pytree.Leaf(token.STRING, "'hello world'"), 'STRING')
    self.assertEqual(
        "FormatToken(name=DOCSTRING, value='hello world', column=0, "
        'lineno=0, splitpenalty=0)', str(tok))
    self.assertTrue(tok.is_string)

    tok = format_token.FormatToken(
        pytree.Leaf(token.COMMENT, '# A comment'), 'COMMENT')
    self.assertEqual(
        'FormatToken(name=COMMENT, value=# A comment, column=0, '
        'lineno=0, splitpenalty=0)', str(tok))
    self.assertTrue(tok.is_comment)

  def testIsMultilineString(self):
    tok = format_token.FormatToken(
        pytree.Leaf(token.STRING, '"""hello"""'), 'STRING')
    self.assertTrue(tok.is_multiline_string)

    tok = format_token.FormatToken(
        pytree.Leaf(token.STRING, 'r"""hello"""'), 'STRING')
    self.assertTrue(tok.is_multiline_string)


if __name__ == '__main__':
  unittest.main()