# -*- coding: utf-8 -*-
# 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.yapf."""

import io
import logging
import os
import shutil
import subprocess
import sys
import tempfile
import textwrap
import unittest

from yapf.yapflib import py3compat
from yapf.yapflib import style
from yapf.yapflib import yapf_api

from yapftests import utils

ROOT_DIR = os.path.dirname(os.path.abspath(os.path.dirname(__file__)))

# Verification is turned off by default, but want to enable it for testing.
YAPF_BINARY = [sys.executable, '-m', 'yapf', '--verify', '--no-local-style']


class FormatCodeTest(unittest.TestCase):

  def _Check(self, unformatted_code, expected_formatted_code):
    formatted_code, _ = yapf_api.FormatCode(
        unformatted_code, style_config='chromium')
    self.assertEqual(expected_formatted_code, formatted_code)

  def testSimple(self):
    unformatted_code = textwrap.dedent("""\
        print('foo')
        """)
    self._Check(unformatted_code, unformatted_code)

  def testNoEndingNewline(self):
    unformatted_code = textwrap.dedent("""\
        if True:
          pass""")
    expected_formatted_code = textwrap.dedent("""\
        if True:
          pass
        """)
    self._Check(unformatted_code, expected_formatted_code)


class FormatFileTest(unittest.TestCase):

  def setUp(self):
    self.test_tmpdir = tempfile.mkdtemp()

  def tearDown(self):
    shutil.rmtree(self.test_tmpdir)

  def assertCodeEqual(self, expected_code, code):
    if code != expected_code:
      msg = 'Code format mismatch:\n'
      msg += 'Expected:\n >'
      msg += '\n > '.join(expected_code.splitlines())
      msg += '\nActual:\n >'
      msg += '\n > '.join(code.splitlines())
      # TODO(sbc): maybe using difflib here to produce easy to read deltas?
      self.fail(msg)

  def testFormatFile(self):
    unformatted_code = textwrap.dedent(u"""\
        if True:
         pass
        """)
    expected_formatted_code_pep8 = textwrap.dedent(u"""\
        if True:
            pass
        """)
    expected_formatted_code_chromium = textwrap.dedent(u"""\
        if True:
          pass
        """)
    with utils.TempFileContents(self.test_tmpdir, unformatted_code) as filepath:
      formatted_code, _, _ = yapf_api.FormatFile(filepath, style_config='pep8')
      self.assertCodeEqual(expected_formatted_code_pep8, formatted_code)

      formatted_code, _, _ = yapf_api.FormatFile(
          filepath, style_config='chromium')
      self.assertCodeEqual(expected_formatted_code_chromium, formatted_code)

  def testDisableLinesPattern(self):
    unformatted_code = textwrap.dedent(u"""\
        if a:    b

        # yapf: disable
        if f:    g

        if h:    i
        """)
    expected_formatted_code = textwrap.dedent(u"""\
        if a: b

        # yapf: disable
        if f:    g

        if h:    i
        """)
    with utils.TempFileContents(self.test_tmpdir, unformatted_code) as filepath:
      formatted_code, _, _ = yapf_api.FormatFile(filepath, style_config='pep8')
      self.assertCodeEqual(expected_formatted_code, formatted_code)

  def testDisableAndReenableLinesPattern(self):
    unformatted_code = textwrap.dedent(u"""\
        if a:    b

        # yapf: disable
        if f:    g
        # yapf: enable

        if h:    i
        """)
    expected_formatted_code = textwrap.dedent(u"""\
        if a: b

        # yapf: disable
        if f:    g
        # yapf: enable

        if h: i
        """)
    with utils.TempFileContents(self.test_tmpdir, unformatted_code) as filepath:
      formatted_code, _, _ = yapf_api.FormatFile(filepath, style_config='pep8')
      self.assertCodeEqual(expected_formatted_code, formatted_code)

  def testDisablePartOfMultilineComment(self):
    unformatted_code = textwrap.dedent(u"""\
        if a:    b

        # This is a multiline comment that disables YAPF.
        # yapf: disable
        if f:    g
        # yapf: enable
        # This is a multiline comment that enables YAPF.

        if h:    i
        """)

    expected_formatted_code = textwrap.dedent(u"""\
        if a: b

        # This is a multiline comment that disables YAPF.
        # yapf: disable
        if f:    g
        # yapf: enable
        # This is a multiline comment that enables YAPF.

        if h: i
        """)
    with utils.TempFileContents(self.test_tmpdir, unformatted_code) as filepath:
      formatted_code, _, _ = yapf_api.FormatFile(filepath, style_config='pep8')
      self.assertCodeEqual(expected_formatted_code, formatted_code)

    code = textwrap.dedent(u"""\
      def foo_function():
          # some comment
          # yapf: disable

          foo(
          bar,
          baz
          )

          # yapf: enable
      """)
    with utils.TempFileContents(self.test_tmpdir, code) as filepath:
      formatted_code, _, _ = yapf_api.FormatFile(filepath, style_config='pep8')
      self.assertCodeEqual(code, formatted_code)

  def testFormatFileLinesSelection(self):
    unformatted_code = textwrap.dedent(u"""\
        if a:    b

        if f:    g

        if h:    i
        """)
    expected_formatted_code_lines1and2 = textwrap.dedent(u"""\
        if a: b

        if f:    g

        if h:    i
        """)
    expected_formatted_code_lines3 = textwrap.dedent(u"""\
        if a:    b

        if f: g

        if h:    i
        """)
    with utils.TempFileContents(self.test_tmpdir, unformatted_code) as filepath:
      formatted_code, _, _ = yapf_api.FormatFile(
          filepath, style_config='pep8', lines=[(1, 2)])
      self.assertCodeEqual(expected_formatted_code_lines1and2, formatted_code)
      formatted_code, _, _ = yapf_api.FormatFile(
          filepath, style_config='pep8', lines=[(3, 3)])
      self.assertCodeEqual(expected_formatted_code_lines3, formatted_code)

  def testFormatFileDiff(self):
    unformatted_code = textwrap.dedent(u"""\
        if True:
         pass
        """)
    with utils.TempFileContents(self.test_tmpdir, unformatted_code) as filepath:
      diff, _, _ = yapf_api.FormatFile(filepath, print_diff=True)
      self.assertTrue(u'+  pass' in diff)

  def testFormatFileInPlace(self):
    unformatted_code = u'True==False\n'
    formatted_code = u'True == False\n'
    with utils.TempFileContents(self.test_tmpdir, unformatted_code) as filepath:
      result, _, _ = yapf_api.FormatFile(filepath, in_place=True)
      self.assertEqual(result, None)
      with open(filepath) as fd:
        if sys.version_info[0] <= 2:
          self.assertCodeEqual(formatted_code, fd.read().decode('ascii'))
        else:
          self.assertCodeEqual(formatted_code, fd.read())

      self.assertRaises(
          ValueError,
          yapf_api.FormatFile,
          filepath,
          in_place=True,
          print_diff=True)

  def testNoFile(self):
    stream = py3compat.StringIO()
    handler = logging.StreamHandler(stream)
    logger = logging.getLogger('mylogger')
    logger.addHandler(handler)
    self.assertRaises(
        IOError, yapf_api.FormatFile, 'not_a_file.py', logger=logger.error)
    self.assertEqual(stream.getvalue(),
                     "[Errno 2] No such file or directory: 'not_a_file.py'\n")

  def testCommentsUnformatted(self):
    code = textwrap.dedent(u"""\
        foo = [# A list of things
               # bork
            'one',
            # quark
            'two'] # yapf: disable
        """)
    with utils.TempFileContents(self.test_tmpdir, code) as filepath:
      formatted_code, _, _ = yapf_api.FormatFile(filepath, style_config='pep8')
      self.assertCodeEqual(code, formatted_code)

  def testDisabledHorizontalFormattingOnNewLine(self):
    code = textwrap.dedent(u"""\
        # yapf: disable
        a = [
        1]
        # yapf: enable
        """)
    with utils.TempFileContents(self.test_tmpdir, code) as filepath:
      formatted_code, _, _ = yapf_api.FormatFile(filepath, style_config='pep8')
      self.assertCodeEqual(code, formatted_code)

  def testSplittingSemicolonStatements(self):
    unformatted_code = textwrap.dedent(u"""\
        def f():
          x = y + 42 ; z = n * 42
          if True: a += 1 ; b += 1; c += 1
        """)
    expected_formatted_code = textwrap.dedent(u"""\
        def f():
            x = y + 42
            z = n * 42
            if True:
                a += 1
                b += 1
                c += 1
        """)
    with utils.TempFileContents(self.test_tmpdir, unformatted_code) as filepath:
      formatted_code, _, _ = yapf_api.FormatFile(filepath, style_config='pep8')
      self.assertCodeEqual(expected_formatted_code, formatted_code)

  def testSemicolonStatementsDisabled(self):
    unformatted_code = textwrap.dedent(u"""\
        def f():
          x = y + 42 ; z = n * 42  # yapf: disable
          if True: a += 1 ; b += 1; c += 1
        """)
    expected_formatted_code = textwrap.dedent(u"""\
        def f():
            x = y + 42 ; z = n * 42  # yapf: disable
            if True:
                a += 1
                b += 1
                c += 1
        """)
    with utils.TempFileContents(self.test_tmpdir, unformatted_code) as filepath:
      formatted_code, _, _ = yapf_api.FormatFile(filepath, style_config='pep8')
      self.assertCodeEqual(expected_formatted_code, formatted_code)

  def testDisabledSemiColonSeparatedStatements(self):
    code = textwrap.dedent(u"""\
        # yapf: disable
        if True: a ; b
        """)
    with utils.TempFileContents(self.test_tmpdir, code) as filepath:
      formatted_code, _, _ = yapf_api.FormatFile(filepath, style_config='pep8')
      self.assertCodeEqual(code, formatted_code)

  def testDisabledMultilineStringInDictionary(self):
    code = textwrap.dedent(u"""\
        # yapf: disable

        A = [
            {
                "aaaaaaaaaaaaaaaaaaa": '''
        bbbbbbbbbbb: "ccccccccccc"
        dddddddddddddd: 1
        eeeeeeee: 0
        ffffffffff: "ggggggg"
        ''',
            },
        ]
        """)
    with utils.TempFileContents(self.test_tmpdir, code) as filepath:
      formatted_code, _, _ = yapf_api.FormatFile(
          filepath, style_config='chromium')
      self.assertCodeEqual(code, formatted_code)

  def testDisabledWithPrecedingText(self):
    code = textwrap.dedent(u"""\
        # TODO(fix formatting): yapf: disable

        A = [
            {
                "aaaaaaaaaaaaaaaaaaa": '''
        bbbbbbbbbbb: "ccccccccccc"
        dddddddddddddd: 1
        eeeeeeee: 0
        ffffffffff: "ggggggg"
        ''',
            },
        ]
        """)
    with utils.TempFileContents(self.test_tmpdir, code) as filepath:
      formatted_code, _, _ = yapf_api.FormatFile(
          filepath, style_config='chromium')
      self.assertCodeEqual(code, formatted_code)

  def testCRLFLineEnding(self):
    code = u'class _():\r\n  pass\r\n'
    with utils.TempFileContents(self.test_tmpdir, code) as filepath:
      formatted_code, _, _ = yapf_api.FormatFile(
          filepath, style_config='chromium')
      self.assertCodeEqual(code, formatted_code)


class CommandLineTest(unittest.TestCase):
  """Test how calling yapf from the command line acts."""

  @classmethod
  def setUpClass(cls):
    cls.test_tmpdir = tempfile.mkdtemp()

  @classmethod
  def tearDownClass(cls):
    shutil.rmtree(cls.test_tmpdir)

  def assertYapfReformats(self,
                          unformatted,
                          expected,
                          extra_options=None,
                          env=None):
    """Check that yapf reformats the given code as expected.

    Invokes yapf in a subprocess, piping the unformatted code into its stdin.
    Checks that the formatted output is as expected.

    Arguments:
      unformatted: unformatted code - input to yapf
      expected: expected formatted code at the output of yapf
      extra_options: iterable of extra command-line options to pass to yapf
      env: dict of environment variables.
    """
    cmdline = YAPF_BINARY + (extra_options or [])
    p = subprocess.Popen(
        cmdline,
        stdout=subprocess.PIPE,
        stdin=subprocess.PIPE,
        stderr=subprocess.PIPE,
        env=env)
    reformatted_code, stderrdata = p.communicate(unformatted.encode('utf-8'))
    self.assertEqual(stderrdata, b'')
    self.assertMultiLineEqual(reformatted_code.decode('utf-8'), expected)

  def testUnicodeEncodingPipedToFile(self):
    unformatted_code = textwrap.dedent(u"""\
        def foo():
            print('⇒')
        """)
    with utils.NamedTempFile(
        dirname=self.test_tmpdir, suffix='.py') as (out, _):
      with utils.TempFileContents(
          self.test_tmpdir, unformatted_code, suffix='.py') as filepath:
        subprocess.check_call(YAPF_BINARY + ['--diff', filepath], stdout=out)

  def testInPlaceReformatting(self):
    unformatted_code = textwrap.dedent(u"""\
        def foo():
          x = 37
        """)
    expected_formatted_code = textwrap.dedent("""\
        def foo():
            x = 37
        """)
    with utils.TempFileContents(
        self.test_tmpdir, unformatted_code, suffix='.py') as filepath:
      p = subprocess.Popen(YAPF_BINARY + ['--in-place', filepath])
      p.wait()
      with io.open(filepath, mode='r', newline='') as fd:
        reformatted_code = fd.read()
    self.assertEqual(reformatted_code, expected_formatted_code)

  def testInPlaceReformattingBlank(self):
    unformatted_code = u'\n\n'
    expected_formatted_code = u'\n'
    with utils.TempFileContents(
        self.test_tmpdir, unformatted_code, suffix='.py') as filepath:
      p = subprocess.Popen(YAPF_BINARY + ['--in-place', filepath])
      p.wait()
      with io.open(filepath, mode='r', encoding='utf-8', newline='') as fd:
        reformatted_code = fd.read()
    self.assertEqual(reformatted_code, expected_formatted_code)

  def testInPlaceReformattingEmpty(self):
    unformatted_code = u''
    expected_formatted_code = u''
    with utils.TempFileContents(
        self.test_tmpdir, unformatted_code, suffix='.py') as filepath:
      p = subprocess.Popen(YAPF_BINARY + ['--in-place', filepath])
      p.wait()
      with io.open(filepath, mode='r', encoding='utf-8', newline='') as fd:
        reformatted_code = fd.read()
    self.assertEqual(reformatted_code, expected_formatted_code)

  def testReadFromStdin(self):
    unformatted_code = textwrap.dedent("""\
        def foo():
          x = 37
        """)
    expected_formatted_code = textwrap.dedent("""\
        def foo():
            x = 37
        """)
    self.assertYapfReformats(unformatted_code, expected_formatted_code)

  def testReadFromStdinWithEscapedStrings(self):
    unformatted_code = textwrap.dedent("""\
        s =   "foo\\nbar"
        """)
    expected_formatted_code = textwrap.dedent("""\
        s = "foo\\nbar"
        """)
    self.assertYapfReformats(unformatted_code, expected_formatted_code)

  def testSetChromiumStyle(self):
    unformatted_code = textwrap.dedent("""\
        def foo(): # trail
            x = 37
        """)
    expected_formatted_code = textwrap.dedent("""\
        def foo():  # trail
          x = 37
        """)
    self.assertYapfReformats(
        unformatted_code,
        expected_formatted_code,
        extra_options=['--style=chromium'])

  def testSetCustomStyleBasedOnChromium(self):
    unformatted_code = textwrap.dedent("""\
        def foo(): # trail
            x = 37
        """)
    expected_formatted_code = textwrap.dedent("""\
        def foo():    # trail
          x = 37
        """)
    style_file = textwrap.dedent(u'''\
        [style]
        based_on_style = chromium
        SPACES_BEFORE_COMMENT = 4
        ''')
    with utils.TempFileContents(self.test_tmpdir, style_file) as stylepath:
      self.assertYapfReformats(
          unformatted_code,
          expected_formatted_code,
          extra_options=['--style={0}'.format(stylepath)])

  def testReadSingleLineCodeFromStdin(self):
    unformatted_code = textwrap.dedent("""\
        if True: pass
        """)
    expected_formatted_code = textwrap.dedent("""\
        if True: pass
        """)
    self.assertYapfReformats(unformatted_code, expected_formatted_code)

  def testEncodingVerification(self):
    unformatted_code = textwrap.dedent(u"""\
        '''The module docstring.'''
        # -*- coding: utf-8 -*-
        def f():
            x = 37
        """)

    with utils.NamedTempFile(
        suffix='.py', dirname=self.test_tmpdir) as (out, _):
      with utils.TempFileContents(
          self.test_tmpdir, unformatted_code, suffix='.py') as filepath:
        try:
          subprocess.check_call(YAPF_BINARY + ['--diff', filepath], stdout=out)
        except subprocess.CalledProcessError as e:
          self.assertEqual(e.returncode, 1)  # Indicates the text changed.

  def testReformattingSpecificLines(self):
    unformatted_code = textwrap.dedent("""\
        def h():
            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):
                pass


        def g():
            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):
                pass
        """)
    expected_formatted_code = textwrap.dedent("""\
        def h():
            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and
                    xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):
                pass


        def g():
            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):
                pass
        """)
    # TODO(ambv): the `expected_formatted_code` here is not PEP8 compliant,
    # raising "E129 visually indented line with same indent as next logical
    # line" with flake8.
    self.assertYapfReformats(
        unformatted_code,
        expected_formatted_code,
        extra_options=['--lines', '1-2'])

  def testOmitFormattingLinesBeforeDisabledFunctionComment(self):
    unformatted_code = textwrap.dedent("""\
        import sys

        # Comment
        def some_func(x):
            x = ["badly" , "formatted","line" ]
        """)
    expected_formatted_code = textwrap.dedent("""\
        import sys

        # Comment
        def some_func(x):
            x = ["badly", "formatted", "line"]
        """)
    self.assertYapfReformats(
        unformatted_code,
        expected_formatted_code,
        extra_options=['--lines', '5-5'])

  def testReformattingSkippingLines(self):
    unformatted_code = textwrap.dedent("""\
        def h():
            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):
                pass

        # yapf: disable
        def g():
            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):
                pass
        # yapf: enable
        """)
    expected_formatted_code = textwrap.dedent("""\
        def h():
            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and
                    xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):
                pass


        # yapf: disable
        def g():
            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):
                pass
        # yapf: enable
        """)
    self.assertYapfReformats(unformatted_code, expected_formatted_code)

  def testReformattingSkippingToEndOfFile(self):
    unformatted_code = textwrap.dedent("""\
        def h():
            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):
                pass

        # yapf: disable
        def g():
            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):
                pass

        def f():
            def e():
                while (xxxxxxxxxxxxxxxxxxxxx(yyyyyyyyyyyyy[zzzzz]) == 'aaaaaaaaaaa' and
                       xxxxxxxxxxxxxxxxxxxxx(yyyyyyyyyyyyy[zzzzz].aaaaaaaa[0]) ==
                       'bbbbbbb'):
                    pass
        """)
    expected_formatted_code = textwrap.dedent("""\
        def h():
            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and
                    xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):
                pass


        # yapf: disable
        def g():
            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):
                pass

        def f():
            def e():
                while (xxxxxxxxxxxxxxxxxxxxx(yyyyyyyyyyyyy[zzzzz]) == 'aaaaaaaaaaa' and
                       xxxxxxxxxxxxxxxxxxxxx(yyyyyyyyyyyyy[zzzzz].aaaaaaaa[0]) ==
                       'bbbbbbb'):
                    pass
        """)
    self.assertYapfReformats(unformatted_code, expected_formatted_code)

  def testReformattingSkippingSingleLine(self):
    unformatted_code = textwrap.dedent("""\
        def h():
            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):
                pass

        def g():
            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):  # yapf: disable
                pass
        """)
    expected_formatted_code = textwrap.dedent("""\
        def h():
            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and
                    xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):
                pass


        def g():
            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):  # yapf: disable
                pass
        """)
    self.assertYapfReformats(unformatted_code, expected_formatted_code)

  def testDisableWholeDataStructure(self):
    unformatted_code = textwrap.dedent("""\
        A = set([
            'hello',
            'world',
        ])  # yapf: disable
        """)
    expected_formatted_code = textwrap.dedent("""\
        A = set([
            'hello',
            'world',
        ])  # yapf: disable
        """)
    self.assertYapfReformats(unformatted_code, expected_formatted_code)

  def testDisableButAdjustIndentations(self):
    unformatted_code = textwrap.dedent("""\
        class SplitPenaltyTest(unittest.TestCase):
          def testUnbreakable(self):
            self._CheckPenalties(tree, [
            ])  # yapf: disable
        """)
    expected_formatted_code = textwrap.dedent("""\
        class SplitPenaltyTest(unittest.TestCase):
            def testUnbreakable(self):
                self._CheckPenalties(tree, [
                ])  # yapf: disable
        """)
    self.assertYapfReformats(unformatted_code, expected_formatted_code)

  def testRetainingHorizontalWhitespace(self):
    unformatted_code = textwrap.dedent("""\
        def h():
            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):
                pass

        def g():
            if (xxxxxxxxxxxx.yyyyyyyy        (zzzzzzzzzzzzz  [0]) ==     'aaaaaaaaaaa' and    xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):  # yapf: disable
                pass
        """)
    expected_formatted_code = textwrap.dedent("""\
        def h():
            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and
                    xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):
                pass


        def g():
            if (xxxxxxxxxxxx.yyyyyyyy        (zzzzzzzzzzzzz  [0]) ==     'aaaaaaaaaaa' and    xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):  # yapf: disable
                pass
        """)
    self.assertYapfReformats(unformatted_code, expected_formatted_code)

  def testRetainingVerticalWhitespace(self):
    unformatted_code = textwrap.dedent("""\
        def h():
            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):
                pass

        def g():


            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):

                pass
        """)
    expected_formatted_code = textwrap.dedent("""\
        def h():
            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and
                    xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):
                pass

        def g():


            if (xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0]) == 'aaaaaaaaaaa' and xxxxxxxxxxxx.yyyyyyyy(zzzzzzzzzzzzz[0].mmmmmmmm[0]) == 'bbbbbbb'):

                pass
        """)
    self.assertYapfReformats(
        unformatted_code,
        expected_formatted_code,
        extra_options=['--lines', '1-2'])

    unformatted_code = textwrap.dedent("""\


        if a:     b


        if c:
            to_much      + indent

            same



        #comment

        #   trailing whitespace
        """)
    expected_formatted_code = textwrap.dedent("""\
        if a: b


        if c:
            to_much      + indent

            same



        #comment

        #   trailing whitespace
        """)
    self.assertYapfReformats(
        unformatted_code,
        expected_formatted_code,
        extra_options=['--lines', '3-3', '--lines', '13-13'])

    unformatted_code = textwrap.dedent("""\
        '''
        docstring

        '''

        import blah
        """)

    self.assertYapfReformats(
        unformatted_code, unformatted_code, extra_options=['--lines', '2-2'])

  def testRetainingSemicolonsWhenSpecifyingLines(self):
    unformatted_code = textwrap.dedent("""\
        a = line_to_format
        def f():
            x = y + 42; z = n * 42
            if True: a += 1 ; b += 1 ; c += 1
        """)
    expected_formatted_code = textwrap.dedent("""\
        a = line_to_format


        def f():
            x = y + 42; z = n * 42
            if True: a += 1 ; b += 1 ; c += 1
        """)
    self.assertYapfReformats(
        unformatted_code,
        expected_formatted_code,
        extra_options=['--lines', '1-1'])

  def testDisabledMultilineStrings(self):
    unformatted_code = textwrap.dedent('''\
        foo=42
        def f():
            email_text += """<html>This is a really long docstring that goes over the column limit and is multi-line.<br><br>
        <b>Czar: </b>"""+despot["Nicholas"]+"""<br>
        <b>Minion: </b>"""+serf["Dmitri"]+"""<br>
        <b>Residence: </b>"""+palace["Winter"]+"""<br>
        </body>
        </html>"""
        ''')
    expected_formatted_code = textwrap.dedent('''\
        foo = 42


        def f():
            email_text += """<html>This is a really long docstring that goes over the column limit and is multi-line.<br><br>
        <b>Czar: </b>"""+despot["Nicholas"]+"""<br>
        <b>Minion: </b>"""+serf["Dmitri"]+"""<br>
        <b>Residence: </b>"""+palace["Winter"]+"""<br>
        </body>
        </html>"""
        ''')
    self.assertYapfReformats(
        unformatted_code,
        expected_formatted_code,
        extra_options=['--lines', '1-1'])

  def testDisableWhenSpecifyingLines(self):
    unformatted_code = textwrap.dedent("""\
        # yapf: disable
        A = set([
            'hello',
            'world',
        ])
        # yapf: enable
        B = set([
            'hello',
            'world',
        ])  # yapf: disable
        """)
    expected_formatted_code = textwrap.dedent("""\
        # yapf: disable
        A = set([
            'hello',
            'world',
        ])
        # yapf: enable
        B = set([
            'hello',
            'world',
        ])  # yapf: disable
        """)
    self.assertYapfReformats(
        unformatted_code,
        expected_formatted_code,
        extra_options=['--lines', '1-10'])

  def testDisableFormattingInDataLiteral(self):
    unformatted_code = textwrap.dedent("""\
        def horrible():
          oh_god()
          why_would_you()
          [
             'do',

              'that',
          ]

        def still_horrible():
            oh_god()
            why_would_you()
            [
                'do',

                'that'
            ]
        """)
    expected_formatted_code = textwrap.dedent("""\
        def horrible():
            oh_god()
            why_would_you()
            [
               'do',

                'that',
            ]

        def still_horrible():
            oh_god()
            why_would_you()
            ['do', 'that']
        """)
    self.assertYapfReformats(
        unformatted_code,
        expected_formatted_code,
        extra_options=['--lines', '14-15'])

  def testRetainVerticalFormattingBetweenDisabledAndEnabledLines(self):
    unformatted_code = textwrap.dedent("""\
        class A(object):
            def aaaaaaaaaaaaa(self):
                c = bbbbbbbbb.ccccccccc('challenge', 0, 1, 10)
                self.assertEqual(
                    ('ddddddddddddddddddddddddd',
             'eeeeeeeeeeeeeeeeeeeeeeeee.%s' %
                     c.ffffffffffff),
             gggggggggggg.hhhhhhhhh(c, c.ffffffffffff))
                iiiii = jjjjjjjjjjjjjj.iiiii
        """)
    expected_formatted_code = textwrap.dedent("""\
        class A(object):
            def aaaaaaaaaaaaa(self):
                c = bbbbbbbbb.ccccccccc('challenge', 0, 1, 10)
                self.assertEqual(('ddddddddddddddddddddddddd',
                                  'eeeeeeeeeeeeeeeeeeeeeeeee.%s' % c.ffffffffffff),
                                 gggggggggggg.hhhhhhhhh(c, c.ffffffffffff))
                iiiii = jjjjjjjjjjjjjj.iiiii
        """)
    self.assertYapfReformats(
        unformatted_code,
        expected_formatted_code,
        extra_options=['--lines', '4-7'])

  def testFormatLinesSpecifiedInMiddleOfExpression(self):
    unformatted_code = textwrap.dedent("""\
        class A(object):
            def aaaaaaaaaaaaa(self):
                c = bbbbbbbbb.ccccccccc('challenge', 0, 1, 10)
                self.assertEqual(
                    ('ddddddddddddddddddddddddd',
             'eeeeeeeeeeeeeeeeeeeeeeeee.%s' %
                     c.ffffffffffff),
             gggggggggggg.hhhhhhhhh(c, c.ffffffffffff))
                iiiii = jjjjjjjjjjjjjj.iiiii
        """)
    expected_formatted_code = textwrap.dedent("""\
        class A(object):
            def aaaaaaaaaaaaa(self):
                c = bbbbbbbbb.ccccccccc('challenge', 0, 1, 10)
                self.assertEqual(('ddddddddddddddddddddddddd',
                                  'eeeeeeeeeeeeeeeeeeeeeeeee.%s' % c.ffffffffffff),
                                 gggggggggggg.hhhhhhhhh(c, c.ffffffffffff))
                iiiii = jjjjjjjjjjjjjj.iiiii
        """)
    self.assertYapfReformats(
        unformatted_code,
        expected_formatted_code,
        extra_options=['--lines', '5-6'])

  def testCommentFollowingMultilineString(self):
    unformatted_code = textwrap.dedent("""\
        def foo():
            '''First line.
            Second line.
            '''  # comment
            x = '''hello world'''  # second comment
            return 42  # another comment
        """)
    expected_formatted_code = textwrap.dedent("""\
        def foo():
            '''First line.
            Second line.
            '''  # comment
            x = '''hello world'''  # second comment
            return 42  # another comment
        """)
    self.assertYapfReformats(
        unformatted_code,
        expected_formatted_code,
        extra_options=['--lines', '1-1'])

  def testDedentClosingBracket(self):
    # no line-break on the first argument, not dedenting closing brackets
    unformatted_code = textwrap.dedent("""\
      def overly_long_function_name(first_argument_on_the_same_line,
      second_argument_makes_the_line_too_long):
        pass
    """)
    expected_formatted_code = textwrap.dedent("""\
      def overly_long_function_name(first_argument_on_the_same_line,
                                    second_argument_makes_the_line_too_long):
          pass
    """)
    self.assertYapfReformats(
        unformatted_code,
        expected_formatted_code,
        extra_options=['--style=pep8'])

    # TODO(ambv): currently the following produces the closing bracket on a new
    # line but indented to the opening bracket which is the worst of both
    # worlds. Expected behaviour would be to format as --style=pep8 does in
    # this case.
    # self.assertYapfReformats(unformatted_code, expected_formatted_code,
    #                          extra_options=['--style=facebook'])

    # line-break before the first argument, dedenting closing brackets if set
    unformatted_code = textwrap.dedent("""\
      def overly_long_function_name(
        first_argument_on_the_same_line,
        second_argument_makes_the_line_too_long):
        pass
    """)
    # expected_formatted_pep8_code = textwrap.dedent("""\
    #   def overly_long_function_name(
    #           first_argument_on_the_same_line,
    #           second_argument_makes_the_line_too_long):
    #       pass
    # """)
    expected_formatted_fb_code = textwrap.dedent("""\
      def overly_long_function_name(
          first_argument_on_the_same_line, second_argument_makes_the_line_too_long
      ):
          pass
    """)
    self.assertYapfReformats(
        unformatted_code,
        expected_formatted_fb_code,
        extra_options=['--style=facebook'])
    # TODO(ambv): currently the following produces code that is not PEP8
    # compliant, raising "E125 continuation line with same indent as next
    # logical line" with flake8. Expected behaviour for PEP8 would be to use
    # double-indentation here.
    # self.assertYapfReformats(unformatted_code, expected_formatted_pep8_code,
    #                          extra_options=['--style=pep8'])

  def testCoalesceBrackets(self):
    unformatted_code = textwrap.dedent("""\
       some_long_function_name_foo(
           {
               'first_argument_of_the_thing': id,
               'second_argument_of_the_thing': "some thing"
           }
       )""")
    expected_formatted_code = textwrap.dedent("""\
       some_long_function_name_foo({
           'first_argument_of_the_thing': id,
           'second_argument_of_the_thing': "some thing"
       })
       """)
    with utils.NamedTempFile(dirname=self.test_tmpdir, mode='w') as (f, name):
      f.write(
          textwrap.dedent(u'''\
          [style]
          column_limit=82
          coalesce_brackets = True
          '''))
      f.flush()
      self.assertYapfReformats(
          unformatted_code,
          expected_formatted_code,
          extra_options=['--style={0}'.format(name)])

  def testPseudoParenSpaces(self):
    unformatted_code = textwrap.dedent("""\
        def foo():
          def bar():
            return {msg_id: author for author, msg_id in reader}
        """)
    expected_formatted_code = textwrap.dedent("""\
        def foo():

          def bar():
            return {msg_id: author for author, msg_id in reader}
        """)
    self.assertYapfReformats(
        unformatted_code,
        expected_formatted_code,
        extra_options=['--lines', '1-1', '--style', 'chromium'])

  def testMultilineCommentFormattingDisabled(self):
    unformatted_code = textwrap.dedent("""\
        # This is a comment
        FOO = {
            aaaaaaaa.ZZZ: [
                bbbbbbbbbb.Pop(),
                # Multiline comment.
                # Line two.
                bbbbbbbbbb.Pop(),
            ],
            'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx':
                ('yyyyy', zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz),
            '#': lambda x: x  # do nothing
        }
        """)
    expected_formatted_code = textwrap.dedent("""\
        # This is a comment
        FOO = {
            aaaaaaaa.ZZZ: [
                bbbbbbbbbb.Pop(),
                # Multiline comment.
                # Line two.
                bbbbbbbbbb.Pop(),
            ],
            'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx':
                ('yyyyy', zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz),
            '#': lambda x: x  # do nothing
        }
        """)
    self.assertYapfReformats(
        unformatted_code,
        expected_formatted_code,
        extra_options=['--lines', '1-1', '--style', 'chromium'])

  def testTrailingCommentsWithDisabledFormatting(self):
    unformatted_code = textwrap.dedent("""\
        import os

        SCOPES = [
            'hello world'  # This is a comment.
        ]
        """)
    expected_formatted_code = textwrap.dedent("""\
        import os

        SCOPES = [
            'hello world'  # This is a comment.
        ]
        """)
    self.assertYapfReformats(
        unformatted_code,
        expected_formatted_code,
        extra_options=['--lines', '1-1', '--style', 'chromium'])

  def testUseTabs(self):
    unformatted_code = """\
def foo_function():
 if True:
  pass
"""
    expected_formatted_code = """\
def foo_function():
	if True:
		pass
"""
    style_contents = u"""\
[style]
based_on_style = chromium
USE_TABS = true
INDENT_WIDTH=1
"""
    with utils.TempFileContents(self.test_tmpdir, style_contents) as stylepath:
      self.assertYapfReformats(
          unformatted_code,
          expected_formatted_code,
          extra_options=['--style={0}'.format(stylepath)])

  def testUseTabsWith(self):
    unformatted_code = """\
def f():
  return ['hello', 'world',]
"""
    expected_formatted_code = """\
def f():
	return [
	    'hello',
	    'world',
	]
"""
    style_contents = u"""\
[style]
based_on_style = chromium
USE_TABS = true
INDENT_WIDTH=1
"""
    with utils.TempFileContents(self.test_tmpdir, style_contents) as stylepath:
      self.assertYapfReformats(
          unformatted_code,
          expected_formatted_code,
          extra_options=['--style={0}'.format(stylepath)])

  def testUseTabsContinuationAlignStyleFixed(self):
    unformatted_code = """\
def foo_function(arg1, arg2, arg3):
  return ['hello', 'world',]
"""
    expected_formatted_code = """\
def foo_function(arg1, arg2,
		arg3):
	return [
			'hello',
			'world',
	]
"""
    style_contents = u"""\
[style]
based_on_style = chromium
USE_TABS = true
COLUMN_LIMIT=32
INDENT_WIDTH=4
CONTINUATION_INDENT_WIDTH=8
CONTINUATION_ALIGN_STYLE = fixed
"""
    with utils.TempFileContents(self.test_tmpdir, style_contents) as stylepath:
      self.assertYapfReformats(
          unformatted_code,
          expected_formatted_code,
          extra_options=['--style={0}'.format(stylepath)])

  def testUseTabsContinuationAlignStyleVAlignRight(self):
    unformatted_code = """\
def foo_function(arg1, arg2, arg3):
  return ['hello', 'world',]
"""
    expected_formatted_code = """\
def foo_function(arg1, arg2,
					arg3):
	return [
			'hello',
			'world',
	]
"""
    style_contents = u"""\
[style]
based_on_style = chromium
USE_TABS = true
COLUMN_LIMIT=32
INDENT_WIDTH=4
CONTINUATION_INDENT_WIDTH=8
CONTINUATION_ALIGN_STYLE = valign-right
"""
    with utils.TempFileContents(self.test_tmpdir, style_contents) as stylepath:
      self.assertYapfReformats(
          unformatted_code,
          expected_formatted_code,
          extra_options=['--style={0}'.format(stylepath)])

  def testStyleOutputRoundTrip(self):
    unformatted_code = textwrap.dedent("""\
        def foo_function():
          pass
        """)
    expected_formatted_code = textwrap.dedent("""\
        def foo_function():
            pass
        """)

    with utils.NamedTempFile(dirname=self.test_tmpdir) as (stylefile,
                                                           stylepath):
      p = subprocess.Popen(
          YAPF_BINARY + ['--style-help'],
          stdout=stylefile,
          stdin=subprocess.PIPE,
          stderr=subprocess.PIPE)
      _, stderrdata = p.communicate()
      self.assertEqual(stderrdata, b'')
      self.assertYapfReformats(
          unformatted_code,
          expected_formatted_code,
          extra_options=['--style={0}'.format(stylepath)])

  def testSpacingBeforeComments(self):
    unformatted_code = textwrap.dedent("""\
        A = 42


        # A comment
        def x():
            pass
        def _():
            pass
        """)
    expected_formatted_code = textwrap.dedent("""\
        A = 42


        # A comment
        def x():
            pass
        def _():
            pass
        """)
    self.assertYapfReformats(
        unformatted_code,
        expected_formatted_code,
        extra_options=['--lines', '1-2'])

  def testSpacingBeforeCommentsInDicts(self):
    unformatted_code = textwrap.dedent("""\
        A=42

        X = {
            # 'Valid' statuses.
            PASSED:  # Passed
                'PASSED',
            FAILED:  # Failed
                'FAILED',
            TIMED_OUT:  # Timed out.
                'FAILED',
            BORKED:  # Broken.
                'BROKEN'
        }
        """)
    expected_formatted_code = textwrap.dedent("""\
        A = 42

        X = {
            # 'Valid' statuses.
            PASSED:  # Passed
                'PASSED',
            FAILED:  # Failed
                'FAILED',
            TIMED_OUT:  # Timed out.
                'FAILED',
            BORKED:  # Broken.
                'BROKEN'
        }
        """)
    self.assertYapfReformats(
        unformatted_code,
        expected_formatted_code,
        extra_options=['--style', 'chromium', '--lines', '1-1'])

  @unittest.skipUnless(py3compat.PY36, 'Requires Python 3.6')
  def testCP936Encoding(self):
    unformatted_code = 'print("中文")\n'
    expected_formatted_code = 'print("中文")\n'
    self.assertYapfReformats(
        unformatted_code,
        expected_formatted_code,
        env={'PYTHONIOENCODING': 'cp936'})


class BadInputTest(unittest.TestCase):
  """Test yapf's behaviour when passed bad input."""

  def testBadSyntax(self):
    code = '  a = 1\n'
    self.assertRaises(SyntaxError, yapf_api.FormatCode, code)


class DiffIndentTest(unittest.TestCase):

  @staticmethod
  def _OwnStyle():
    my_style = style.CreatePEP8Style()
    my_style['INDENT_WIDTH'] = 3
    my_style['CONTINUATION_INDENT_WIDTH'] = 3
    return my_style

  def _Check(self, unformatted_code, expected_formatted_code):
    formatted_code, _ = yapf_api.FormatCode(
        unformatted_code, style_config=style.SetGlobalStyle(self._OwnStyle()))
    self.assertEqual(expected_formatted_code, formatted_code)

  def testSimple(self):
    unformatted_code = textwrap.dedent("""\
        for i in range(5):
         print('bar')
         """)
    expected_formatted_code = textwrap.dedent("""\
        for i in range(5):
           print('bar')
           """)
    self._Check(unformatted_code, expected_formatted_code)


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