# encoding: utf-8
#
# Copyright (C) 2016-2019 YouCompleteMe contributors
#
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#
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# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with YouCompleteMe.  If not, see <http://www.gnu.org/licenses/>.

from hamcrest import assert_that, contains_exactly, empty, has_entries
from unittest import TestCase

from ycm.tests.test_utils import MockVimBuffers, MockVimModule, VimBuffer
MockVimModule()

from ycm import vimsupport
from ycm.tests import YouCompleteMeInstance, youcompleteme_instance

FILETYPE = 'ycmtest'
TRIGGERS = {
  'ycmtest': [ '.' ]
}


def StartColumnCompliance( ycm,
                           omnifunc_start_column,
                           ycm_completions,
                           ycm_start_column ):
  def Omnifunc( findstart, base ):
    if findstart:
      return omnifunc_start_column
    return [ 'foo' ]

  current_buffer = VimBuffer( 'buffer',
                              contents = [ 'fo' ],
                              filetype = FILETYPE,
                              omnifunc = Omnifunc )

  with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 2 ) ):
    ycm.SendCompletionRequest( force_semantic = True )
    r = ycm.GetCompletionResponse()
    assert_that(
      r,
      has_entries( {
        'completions': ycm_completions,
        'completion_start_column': ycm_start_column
      } )
    )


class OmniCompleterTest( TestCase ):
  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 1,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_Cache_List( self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 5
      return [ 'a', 'b', 'cdef' ]

    current_buffer = VimBuffer( 'buffer',
                                contents = [ 'test.' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 5 ) ):
      ycm.SendCompletionRequest()
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': [
            { 'word': 'a',    'equal': 1 },
            { 'word': 'b',    'equal': 1 },
            { 'word': 'cdef', 'equal': 1 }
          ],
          'completion_start_column': 6
        } )
      )


  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 1,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_Cache_ListFilter( self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 5
      return [ 'a', 'b', 'cdef' ]

    current_buffer = VimBuffer( 'buffer',
                                contents = [ 'test.t' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 6 ) ):
      ycm.SendCompletionRequest()
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': empty(),
          'completion_start_column': 6
        } )
      )


  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 0,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_NoCache_List( self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 5
      return [ 'a', 'b', 'cdef' ]

    current_buffer = VimBuffer( 'buffer',
                                contents = [ 'test.' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 5 ) ):
      ycm.SendCompletionRequest()
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': [
            { 'word': 'a',    'equal': 1 },
            { 'word': 'b',    'equal': 1 },
            { 'word': 'cdef', 'equal': 1 }
          ],
          'completion_start_column': 6
        } )
      )


  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 0,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_NoCache_ListFilter( self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 5
      return [ 'a', 'b', 'cdef' ]

    current_buffer = VimBuffer( 'buffer',
                                contents = [ 'test.t' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 6 ) ):
      ycm.SendCompletionRequest()
      # Actual result is that the results are not filtered, as we expect the
      # omnifunc or vim itself to do this filtering.
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': [
            { 'word': 'a',    'equal': 1 },
            { 'word': 'b',    'equal': 1 },
            { 'word': 'cdef', 'equal': 1 }
          ],
          'completion_start_column': 6
        } )
      )


  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 0,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_NoCache_UseFindStart( self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 0
      return [ 'a', 'b', 'cdef' ]

    current_buffer = VimBuffer( 'buffer',
                                contents = [ 'test.t' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 6 ) ):
      ycm.SendCompletionRequest()
      # Actual result is that the results are not filtered, as we expect the
      # omnifunc or vim itself to do this filtering.
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': [
            { 'word': 'a',    'equal': 1 },
            { 'word': 'b',    'equal': 1 },
            { 'word': 'cdef', 'equal': 1 }
          ],
          'completion_start_column': 1
        } )
      )


  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 1,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_Cache_UseFindStart( self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 0
      return [ 'a', 'b', 'cdef' ]

    current_buffer = VimBuffer( 'buffer',
                                contents = [ 'test.t' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 6 ) ):
      ycm.SendCompletionRequest()
      # There are no results because the query 'test.t' doesn't match any
      # candidate (and cache_omnifunc=1, so we FilterAndSortCandidates).
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': empty(),
          'completion_start_column': 1
        } )
      )


  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 1,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_Cache_Object( self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 5
      return { 'words': [ 'a', 'b', 'CDtEF' ] }

    current_buffer = VimBuffer( 'buffer',
                                contents = [ 'test.t' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 6 ) ):
      ycm.SendCompletionRequest()
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': [ { 'word': 'CDtEF', 'equal': 1 } ],
          'completion_start_column': 6
        } )
      )


  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 1,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_Cache_ObjectList( self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 5
      return [
        {
          'word': 'a',
          'abbr': 'ABBR',
          'menu': 'MENU',
          'info': 'INFO',
          'kind': 'K'
        },
        {
          'word': 'test',
          'abbr': 'ABBRTEST',
          'menu': 'MENUTEST',
          'info': 'INFOTEST',
          'kind': 'T'
        }
      ]

    current_buffer = VimBuffer( 'buffer',
                                contents = [ 'test.tt' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 7 ) ):
      ycm.SendCompletionRequest()
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': contains_exactly( {
            'word' : 'test',
            'abbr' : 'ABBRTEST',
            'menu' : 'MENUTEST',
            'info' : 'INFOTEST',
            'kind' : 'T',
            'equal': 1
          } ),
          'completion_start_column': 6
        } )
      )


  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 0,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_NoCache_ObjectList( self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 5
      return [
        {
          'word': 'a',
          'abbr': 'ABBR',
          'menu': 'MENU',
          'info': 'INFO',
          'kind': 'K'
        },
        {
          'word': 'test',
          'abbr': 'ABBRTEST',
          'menu': 'MENUTEST',
          'info': 'INFOTEST',
          'kind': 'T'
        }
      ]

    current_buffer = VimBuffer( 'buffer',
                                contents = [ 'test.tt' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 7 ) ):
      ycm.SendCompletionRequest()
      # We don't filter the result - we expect the omnifunc to do that
      # based on the query we supplied (Note: that means no fuzzy matching!).
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': [ {
            'word' : 'a',
            'abbr' : 'ABBR',
            'menu' : 'MENU',
            'info' : 'INFO',
            'kind' : 'K',
            'equal': 1
          }, {
            'word' : 'test',
            'abbr' : 'ABBRTEST',
            'menu' : 'MENUTEST',
            'info' : 'INFOTEST',
            'kind' : 'T',
            'equal': 1
          } ],
          'completion_start_column': 6
        } )
      )


  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 1,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_Cache_ObjectListObject( self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 5
      return { 'words': [
        {
          'word': 'a',
          'abbr': 'ABBR',
          'menu': 'MENU',
          'info': 'INFO',
          'kind': 'K'
        },
        {
          'word': 'test',
          'abbr': 'ABBRTEST',
          'menu': 'MENUTEST',
          'info': 'INFOTEST',
          'kind': 'T'
        }
      ] }

    current_buffer = VimBuffer( 'buffer',
                                contents = [ 'test.tt' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 7 ) ):
      ycm.SendCompletionRequest()
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': [ {
            'word' : 'test',
            'abbr' : 'ABBRTEST',
            'menu' : 'MENUTEST',
            'info' : 'INFOTEST',
            'kind' : 'T',
            'equal': 1
          } ],
          'completion_start_column': 6
        } )
      )


  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 0,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_NoCache_ObjectListObject( self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 5
      return { 'words': [
        {
          'word': 'a',
          'abbr': 'ABBR',
          'menu': 'MENU',
          'info': 'INFO',
          'kind': 'K'
        },
        {
          'word': 'test',
          'abbr': 'ABBRTEST',
          'menu': 'MENUTEST',
          'info': 'INFOTEST',
          'kind': 'T'
        }
      ] }

    current_buffer = VimBuffer( 'buffer',
                                contents = [ 'test.tt' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 7 ) ):
      ycm.SendCompletionRequest()
      # No FilterAndSortCandidates for cache_omnifunc=0 (we expect the omnifunc
      # to do the filtering?)
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': [ {
            'word' : 'a',
            'abbr' : 'ABBR',
            'menu' : 'MENU',
            'info' : 'INFO',
            'kind' : 'K',
            'equal': 1
          }, {
            'word' : 'test',
            'abbr' : 'ABBRTEST',
            'menu' : 'MENUTEST',
            'info' : 'INFOTEST',
            'kind' : 'T',
            'equal': 1
          } ],
          'completion_start_column': 6
        } )
      )


  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 1,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_Cache_List_Unicode( self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 12
      return [ '†est', 'å_unicode_identifier', 'πππππππ yummy πie' ]

    current_buffer = VimBuffer( 'buffer',
                                contents = [ '†åsty_π.' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 12 ) ):
      ycm.SendCompletionRequest()
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': [
            { 'word': 'å_unicode_identifier', 'equal': 1 },
            { 'word': 'πππππππ yummy πie',    'equal': 1 },
            { 'word': '†est',                 'equal': 1 }
          ],
          'completion_start_column': 13
        } )
      )


  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 0,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_NoCache_List_Unicode( self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 12
      return [ '†est', 'å_unicode_identifier', 'πππππππ yummy πie' ]

    current_buffer = VimBuffer( 'buffer',
                                contents = [ '†åsty_π.' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 12 ) ):
      ycm.SendCompletionRequest()
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': [
            { 'word': '†est',                 'equal': 1 },
            { 'word': 'å_unicode_identifier', 'equal': 1 },
            { 'word': 'πππππππ yummy πie',    'equal': 1 }
          ],
          'completion_start_column': 13
        } )
      )


  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 1,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_Cache_List_Filter_Unicode( self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 12
      return [ '†est', 'å_unicode_identifier', 'πππππππ yummy πie' ]

    current_buffer = VimBuffer( 'buffer',
                                contents = [ '†åsty_π.ππ' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 17 ) ):
      ycm.SendCompletionRequest()
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': [ { 'word': 'πππππππ yummy πie', 'equal': 1 } ],
          'completion_start_column': 13
        } )
      )


  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 0,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_NoCache_List_Filter_Unicode(
      self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 12
      return [ 'πππππππ yummy πie' ]

    current_buffer = VimBuffer( 'buffer',
                                contents = [ '†åsty_π.ππ' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 17 ) ):
      ycm.SendCompletionRequest()
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': [ { 'word': 'πππππππ yummy πie', 'equal': 1 } ],
          'completion_start_column': 13
        } )
      )


  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 1,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_Cache_ObjectList_Unicode( self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 12
      return [
        {
          'word': 'ålpha∫et',
          'abbr': 'å∫∫®',
          'menu': 'µ´~¨á',
          'info': '^~fo',
          'kind': '˚'
        },
        {
          'word': 'π†´ß†π',
          'abbr': 'ÅııÂʉÍÊ',
          'menu': '˜‰ˆËʉÍÊ',
          'info': 'ȈÏØʉÍÊ',
          'kind': 'Ê'
        }
      ]

    current_buffer = VimBuffer( 'buffer',
                                contents = [ '†åsty_π.ππ' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 17 ) ):
      ycm.SendCompletionRequest()
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': [ {
            'word' : 'π†´ß†π',
            'abbr' : 'ÅııÂʉÍÊ',
            'menu' : '˜‰ˆËʉÍÊ',
            'info' : 'ȈÏØʉÍÊ',
            'kind' : 'Ê',
            'equal': 1
          } ],
          'completion_start_column': 13
        } )
      )


  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 1,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_Cache_ObjectListObject_Unicode(
      self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 12
      return {
        'words': [
          {
            'word': 'ålpha∫et',
            'abbr': 'å∫∫®',
            'menu': 'µ´~¨á',
            'info': '^~fo',
            'kind': '˚'
          },
          {
            'word': 'π†´ß†π',
            'abbr': 'ÅııÂʉÍÊ',
            'menu': '˜‰ˆËʉÍÊ',
            'info': 'ȈÏØʉÍÊ',
            'kind': 'Ê'
          },
          {
            'word': 'test',
            'abbr': 'ÅııÂʉÍÊ',
            'menu': '˜‰ˆËʉÍÊ',
            'info': 'ȈÏØʉÍÊ',
            'kind': 'Ê'
          }
        ]
      }

    current_buffer = VimBuffer( 'buffer',
                                contents = [ '†åsty_π.t' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 13 ) ):
      ycm.SendCompletionRequest()
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': contains_exactly( {
            'word' : 'test',
            'abbr' : 'ÅııÂʉÍÊ',
            'menu' : '˜‰ˆËʉÍÊ',
            'info' : 'ȈÏØʉÍÊ',
            'kind' : 'Ê',
            'equal': 1
          }, {
            'word' : 'ålpha∫et',
            'abbr' : 'å∫∫®',
            'menu' : 'µ´~¨á',
            'info' : '^~fo',
            'kind' : '˚',
            'equal': 1
          } ),
          'completion_start_column': 13
        } )
      )


  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 1,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_RestoreCursorPositionAfterOmnifuncCall(
    self, ycm ):

    # This omnifunc moves the cursor to the test definition like
    # ccomplete#Complete would.
    def Omnifunc( findstart, base ):
      vimsupport.SetCurrentLineAndColumn( 0, 0 )
      if findstart:
        return 5
      return [ 'length' ]

    current_buffer = VimBuffer( 'buffer',
                                contents = [ 'String test',
                                             '',
                                             'test.' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 3, 5 ) ):
      ycm.SendCompletionRequest()
      assert_that(
        vimsupport.CurrentLineAndColumn(),
        contains_exactly( 2, 5 )
      )
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': [ { 'word': 'length', 'equal': 1 } ],
          'completion_start_column': 6
        } )
      )


  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 1,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_MoveCursorPositionAtStartColumn(
      self, ycm ):
    # This omnifunc relies on the cursor being moved at the start column when
    # called the second time like LanguageClient#complete from the
    # LanguageClient-neovim plugin.
    def Omnifunc( findstart, base ):
      if findstart:
        return 5
      if vimsupport.CurrentColumn() == 5:
        return [ 'length' ]
      return []

    current_buffer = VimBuffer( 'buffer',
                                contents = [ 'String test',
                                             '',
                                             'test.le' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 3, 7 ) ):
      ycm.SendCompletionRequest()
      assert_that(
        vimsupport.CurrentLineAndColumn(),
        contains_exactly( 2, 7 )
      )
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': [ { 'word': 'length', 'equal': 1 } ],
          'completion_start_column': 6
        } )
      )


  def test_OmniCompleter_GetCompletions_StartColumnCompliance( self ):
    for omnifunc_start_column, ycm_completions, ycm_start_column in [
     [ -4, [ { 'word': 'foo', 'equal': 1 } ], 3 ],
     [ -3, [],                                1 ],
     [ -2, [],                                1 ],
     [ -1, [ { 'word': 'foo', 'equal': 1 } ], 3 ],
     [ 0, [ { 'word': 'foo', 'equal': 1 } ], 1 ],
     [ 1, [ { 'word': 'foo', 'equal': 1 } ], 2 ],
     [ 2, [ { 'word': 'foo', 'equal': 1 } ], 3 ],
     [ 3, [ { 'word': 'foo', 'equal': 1 } ], 3 ]
      ]:
      with youcompleteme_instance( { 'g:ycm_cache_omnifunc': 1 } ) as ycm:
        with self.subTest( omnifunc_start_column = omnifunc_start_column,
                           ycm_completions = ycm_completions,
                           ycm_start_column = ycm_start_column ):
          StartColumnCompliance( ycm,
                                 omnifunc_start_column,
                                 ycm_completions,
                                 ycm_start_column )


  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 0,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_NoCache_NoSemanticTrigger( self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 0
      return [ 'test' ]

    current_buffer = VimBuffer( 'buffer',
                                contents = [ 'te' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 3 ) ):
      ycm.SendCompletionRequest()
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': empty(),
          'completion_start_column': 1
        } )
      )


  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 0,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_NoCache_ForceSemantic( self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 0
      return [ 'test' ]

    current_buffer = VimBuffer( 'buffer',
                                contents = [ 'te' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 3 ) ):
      ycm.SendCompletionRequest( force_semantic = True )
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': [ { 'word': 'test', 'equal': 1 } ],
          'completion_start_column': 1
        } )
      )


  @YouCompleteMeInstance( { 'g:ycm_cache_omnifunc': 1,
                            'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_ConvertStringsToDictionaries(
      self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 5
      return [
        { 'word': 'a' },
        'b'
      ]

    current_buffer = VimBuffer( 'buffer',
                                contents = [ 'test.' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 7 ) ):
      ycm.SendCompletionRequest()
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': [
            { 'word': 'a', 'equal': 1 },
            { 'word': 'b', 'equal': 1 }
          ],
          'completion_start_column': 6
        } )
      )


  @YouCompleteMeInstance( {
    'g:ycm_cache_omnifunc': 0,
    'g:ycm_filetype_specific_completion_to_disable': { FILETYPE: 1 },
    'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_FiletypeDisabled_SemanticTrigger(
      self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 5
      return [ 'a', 'b', 'cdef' ]

    current_buffer = VimBuffer( 'buffer',
                                contents = [ 'test.' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 6 ) ):
      ycm.SendCompletionRequest()
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': empty(),
          'completion_start_column': 6
        } )
      )


  @YouCompleteMeInstance( {
    'g:ycm_cache_omnifunc': 0,
    'g:ycm_filetype_specific_completion_to_disable': { '*': 1 },
    'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_AllFiletypesDisabled_SemanticTrigger(
    self, ycm ):

    def Omnifunc( findstart, base ):
      if findstart:
        return 5
      return [ 'a', 'b', 'cdef' ]

    current_buffer = VimBuffer( 'buffer',
                                contents = [ 'test.' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 6 ) ):
      ycm.SendCompletionRequest()
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': empty(),
          'completion_start_column': 6
        } )
      )


  @YouCompleteMeInstance( {
    'g:ycm_cache_omnifunc': 0,
    'g:ycm_filetype_specific_completion_to_disable': { FILETYPE: 1 },
    'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_FiletypeDisabled_ForceSemantic(
      self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 5
      return [ 'a', 'b', 'cdef' ]

    current_buffer = VimBuffer( 'buffer',
                                contents = [ 'test.' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 6 ) ):
      ycm.SendCompletionRequest( force_semantic = True )
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': [
            { 'word': 'a',    'equal': 1 },
            { 'word': 'b',    'equal': 1 },
            { 'word': 'cdef', 'equal': 1 }
          ],
          'completion_start_column': 6
        } )
      )


  @YouCompleteMeInstance( {
    'g:ycm_cache_omnifunc': 0,
    'g:ycm_filetype_specific_completion_to_disable': { '*': 1 },
    'g:ycm_semantic_triggers': TRIGGERS } )
  def test_OmniCompleter_GetCompletions_AllFiletypesDisabled_ForceSemantic(
      self, ycm ):
    def Omnifunc( findstart, base ):
      if findstart:
        return 5
      return [ 'a', 'b', 'cdef' ]

    current_buffer = VimBuffer( 'buffer',
                                contents = [ 'test.' ],
                                filetype = FILETYPE,
                                omnifunc = Omnifunc )

    with MockVimBuffers( [ current_buffer ], [ current_buffer ], ( 1, 6 ) ):
      ycm.SendCompletionRequest( force_semantic = True )
      assert_that(
        ycm.GetCompletionResponse(),
        has_entries( {
          'completions': [
            { 'word': 'a',    'equal': 1 },
            { 'word': 'b',    'equal': 1 },
            { 'word': 'cdef', 'equal': 1 }
          ],
          'completion_start_column': 6
        } )
      )