Before:
  call ale#test#SetDirectory('/testplugin/test')
  call ale#test#SetFilename('dummy.txt')

  let g:old_filename = expand('%:p')
  let g:Callback = ''
  let g:message_list = []
  let g:expr_list = []
  let g:capability_checked = ''
  let g:conn_id = v:null
  let g:WaitCallback = v:null

  runtime autoload/ale/linter.vim
  runtime autoload/ale/lsp.vim
  runtime autoload/ale/util.vim

  function! ale#lsp_linter#StartLSP(buffer, linter) abort
    let g:conn_id = ale#lsp#Register('executable', '/foo/bar', {})
    call ale#lsp#MarkDocumentAsOpen(g:conn_id, a:buffer)

    return {
    \ 'buffer': a:buffer,
    \ 'connection_id': g:conn_id,
    \ 'project_root': '/foo/bar',
    \ 'language_id': 'python',
    \}
  endfunction

  function! ale#lsp#WaitForCapability(conn_id, capability, callback) abort
    let g:capability_checked = a:capability
    let g:WaitCallback = a:callback
  endfunction

  function! ale#lsp#RegisterCallback(conn_id, callback) abort
    let g:Callback = a:callback
  endfunction

  function! ale#lsp#Send(conn_id, message) abort
    call add(g:message_list, a:message)

    return 42
  endfunction

  function! ale#util#Execute(expr) abort
    call add(g:expr_list, a:expr)
  endfunction

After:
  if g:conn_id isnot v:null
    call ale#lsp#RemoveConnectionWithID(g:conn_id)
  endif

  call ale#definition#SetMap({})
  call ale#test#RestoreDirectory()
  call ale#linter#Reset()

  unlet! g:capability_checked
  unlet! g:WaitCallback
  unlet! g:old_filename
  unlet! g:conn_id
  unlet! g:Callback
  unlet! g:message_list
  unlet! g:expr_list
  unlet! b:ale_linters

  runtime autoload/ale/lsp_linter.vim
  runtime autoload/ale/lsp.vim
  runtime autoload/ale/util.vim

Execute(Other messages for the tsserver handler should be ignored):
  call ale#definition#HandleTSServerResponse(1, {'command': 'foo'})

Execute(Failed definition responses should be handled correctly):
  call ale#definition#SetMap({3: {'open_in': 'current-buffer'}})
  call ale#definition#HandleTSServerResponse(
  \ 1,
  \ {'command': 'definition', 'request_seq': 3}
  \)
  AssertEqual {}, ale#definition#GetMap()

Execute(Failed definition responses with no files should be handled correctly):
  call ale#definition#SetMap({3: {'open_in': 'current-buffer'}})
  call ale#definition#HandleTSServerResponse(
  \ 1,
  \ {
  \   'command': 'definition',
  \   'request_seq': 3,
  \   'success': v:true,
  \   'body': [],
  \ }
  \)
  AssertEqual {}, ale#definition#GetMap()

Given typescript(Some typescript file):
  foo
  somelongerline
  bazxyzxyzxyz

Execute(Other files should be jumped to for definition responses):
  call ale#definition#SetMap({3: {'open_in': 'current-buffer'}})
  call ale#definition#HandleTSServerResponse(
  \ 1,
  \ {
  \   'command': 'definition',
  \   'request_seq': 3,
  \   'success': v:true,
  \   'body': [
  \     {
  \       'file': ale#path#Simplify(g:dir . '/completion_dummy_file'),
  \       'start': {'line': 3, 'offset': 7},
  \     },
  \   ],
  \ }
  \)

  AssertEqual
  \ [
  \   'edit +3 ' . fnameescape(ale#path#Simplify(g:dir . '/completion_dummy_file')),
  \ ],
  \ g:expr_list
  AssertEqual [3, 7], getpos('.')[1:2]
  AssertEqual {}, ale#definition#GetMap()

Execute(Other files should be jumped to for definition responses in tabs too):
  call ale#definition#SetMap({3: {'open_in': 'tab'}})
  call ale#definition#HandleTSServerResponse(
  \ 1,
  \ {
  \   'command': 'definition',
  \   'request_seq': 3,
  \   'success': v:true,
  \   'body': [
  \     {
  \       'file': ale#path#Simplify(g:dir . '/completion_dummy_file'),
  \       'start': {'line': 3, 'offset': 7},
  \     },
  \   ],
  \ }
  \)

  AssertEqual
  \ [
  \   'tabedit +3 ' . fnameescape(ale#path#Simplify(g:dir . '/completion_dummy_file')),
  \ ],
  \ g:expr_list
  AssertEqual [3, 7], getpos('.')[1:2]
  AssertEqual {}, ale#definition#GetMap()

Execute(Other files should be jumped to for definition responses in splits too):
  call ale#definition#SetMap({3: {'open_in': 'horizontal-split'}})
  call ale#definition#HandleTSServerResponse(
  \ 1,
  \ {
  \   'command': 'definition',
  \   'request_seq': 3,
  \   'success': v:true,
  \   'body': [
  \     {
  \       'file': ale#path#Simplify(g:dir . '/completion_dummy_file'),
  \       'start': {'line': 3, 'offset': 7},
  \     },
  \   ],
  \ }
  \)

  AssertEqual
  \ [
  \   'split +3 ' . fnameescape(ale#path#Simplify(g:dir . '/completion_dummy_file')),
  \ ],
  \ g:expr_list
  AssertEqual [3, 7], getpos('.')[1:2]
  AssertEqual {}, ale#definition#GetMap()

Execute(Other files should be jumped to for definition responses in vsplits too):
  call ale#definition#SetMap({3: {'open_in': 'vertical-split'}})
  call ale#definition#HandleTSServerResponse(
  \ 1,
  \ {
  \   'command': 'definition',
  \   'request_seq': 3,
  \   'success': v:true,
  \   'body': [
  \     {
  \       'file': ale#path#Simplify(g:dir . '/completion_dummy_file'),
  \       'start': {'line': 3, 'offset': 7},
  \     },
  \   ],
  \ }
  \)

  AssertEqual
  \ [
  \   'vsplit +3 ' . fnameescape(ale#path#Simplify(g:dir . '/completion_dummy_file')),
  \ ],
  \ g:expr_list
  AssertEqual [3, 7], getpos('.')[1:2]
  AssertEqual {}, ale#definition#GetMap()

Execute(tsserver completion requests should be sent):
  runtime ale_linters/typescript/tsserver.vim
  call setpos('.', [bufnr(''), 2, 5, 0])

  ALEGoToDefinition

  " We shouldn't register the callback yet.
  AssertEqual '''''', string(g:Callback)

  AssertEqual type(function('type')), type(g:WaitCallback)
  AssertEqual 'definition', g:capability_checked
  call call(g:WaitCallback, [g:conn_id, '/foo/bar'])

  AssertEqual
  \ 'function(''ale#definition#HandleTSServerResponse'')',
  \ string(g:Callback)
  AssertEqual
  \ [[0, 'ts@definition', {'file': expand('%:p'), 'line': 2, 'offset': 5}]],
  \ g:message_list
  AssertEqual {'42': {'open_in': 'current-buffer'}}, ale#definition#GetMap()

Execute(tsserver tab completion requests should be sent):
  runtime ale_linters/typescript/tsserver.vim
  call setpos('.', [bufnr(''), 2, 5, 0])

  ALEGoToDefinitionInTab

  " We shouldn't register the callback yet.
  AssertEqual '''''', string(g:Callback)

  AssertEqual type(function('type')), type(g:WaitCallback)
  AssertEqual 'definition', g:capability_checked
  call call(g:WaitCallback, [g:conn_id, '/foo/bar'])

  AssertEqual
  \ 'function(''ale#definition#HandleTSServerResponse'')',
  \ string(g:Callback)
  AssertEqual
  \ [[0, 'ts@definition', {'file': expand('%:p'), 'line': 2, 'offset': 5}]],
  \ g:message_list
  AssertEqual {'42': {'open_in': 'tab'}}, ale#definition#GetMap()

Given python(Some Python file):
  foo
  somelongerline
  bazxyzxyzxyz

Execute(Other files should be jumped to for LSP definition responses):
  call ale#definition#SetMap({3: {'open_in': 'current-buffer'}})
  call ale#definition#HandleLSPResponse(
  \ 1,
  \ {
  \   'id': 3,
  \   'result': {
  \     'uri': ale#path#ToURI(ale#path#Simplify(g:dir . '/completion_dummy_file')),
  \     'range': {
  \       'start': {'line': 2, 'character': 7},
  \     },
  \   },
  \ }
  \)

  AssertEqual
  \ [
  \   'edit +3 ' . fnameescape(ale#path#Simplify(g:dir . '/completion_dummy_file')),
  \ ],
  \ g:expr_list
  AssertEqual [3, 8], getpos('.')[1:2]
  AssertEqual {}, ale#definition#GetMap()

Execute(Locations inside the same file should be jumped to without using :edit):
  call ale#definition#SetMap({3: {'open_in': 'current-buffer'}})
  call ale#definition#HandleLSPResponse(
  \ 1,
  \ {
  \   'id': 3,
  \   'result': {
  \     'uri': ale#path#ToURI(ale#path#Simplify(expand('%:p'))),
  \     'range': {
  \       'start': {'line': 2, 'character': 7},
  \     },
  \   },
  \ }
  \)

  AssertEqual
  \ [
  \ ],
  \ g:expr_list
  AssertEqual [3, 8], getpos('.')[1:2]
  AssertEqual {}, ale#definition#GetMap()

Execute(Other files should be jumped to in tabs for LSP definition responses):
  call ale#definition#SetMap({3: {'open_in': 'tab'}})
  call ale#definition#HandleLSPResponse(
  \ 1,
  \ {
  \   'id': 3,
  \   'result': {
  \     'uri': ale#path#ToURI(ale#path#Simplify(g:dir . '/completion_dummy_file')),
  \     'range': {
  \       'start': {'line': 2, 'character': 7},
  \     },
  \   },
  \ }
  \)

  AssertEqual
  \ [
  \   'tabedit +3 ' . fnameescape(ale#path#Simplify(g:dir . '/completion_dummy_file')),
  \ ],
  \ g:expr_list
  AssertEqual [3, 8], getpos('.')[1:2]
  AssertEqual {}, ale#definition#GetMap()

Execute(Definition responses with lists should be handled):
  call ale#definition#SetMap({3: {'open_in': 'current-buffer'}})
  call ale#definition#HandleLSPResponse(
  \ 1,
  \ {
  \   'id': 3,
  \   'result': [
  \     {
  \       'uri': ale#path#ToURI(ale#path#Simplify(g:dir . '/completion_dummy_file')),
  \       'range': {
  \         'start': {'line': 2, 'character': 7},
  \       },
  \     },
  \     {
  \       'uri': ale#path#ToURI(ale#path#Simplify(g:dir . '/other_file')),
  \       'range': {
  \         'start': {'line': 20, 'character': 3},
  \       },
  \     },
  \   ],
  \ }
  \)

  AssertEqual
  \ [
  \   'edit +3 ' . fnameescape(ale#path#Simplify(g:dir . '/completion_dummy_file')),
  \ ],
  \ g:expr_list
  AssertEqual [3, 8], getpos('.')[1:2]
  AssertEqual {}, ale#definition#GetMap()

Execute(Definition responses with null response should be handled):
  call ale#definition#SetMap({3: {'open_in': 'current-buffer'}})
  call ale#definition#HandleLSPResponse(1, {'id': 3, 'result': v:null})

  AssertEqual [], g:expr_list

Execute(LSP completion requests should be sent):
  runtime ale_linters/python/pyls.vim
  let b:ale_linters = ['pyls']
  call setpos('.', [bufnr(''), 1, 5, 0])

  ALEGoToDefinition

  " We shouldn't register the callback yet.
  AssertEqual '''''', string(g:Callback)

  AssertEqual type(function('type')), type(g:WaitCallback)
  AssertEqual 'definition', g:capability_checked
  call call(g:WaitCallback, [g:conn_id, '/foo/bar'])

  AssertEqual
  \ 'function(''ale#definition#HandleLSPResponse'')',
  \ string(g:Callback)

  AssertEqual
  \ [
  \   [1, 'textDocument/didChange', {
  \     'textDocument': {
  \         'uri': ale#path#ToURI(expand('%:p')),
  \         'version': g:ale_lsp_next_version_id - 1,
  \     },
  \     'contentChanges': [{'text': join(getline(1, '$'), "\n") . "\n"}]
  \   }],
  \   [0, 'textDocument/definition', {
  \   'textDocument': {'uri': ale#path#ToURI(expand('%:p'))},
  \   'position': {'line': 0, 'character': 2},
  \   }],
  \ ],
  \ g:message_list

  AssertEqual {'42': {'open_in': 'current-buffer'}}, ale#definition#GetMap()

Execute(LSP tab completion requests should be sent):
  runtime ale_linters/python/pyls.vim
  let b:ale_linters = ['pyls']
  call setpos('.', [bufnr(''), 1, 5, 0])

  ALEGoToDefinitionInTab

  " We shouldn't register the callback yet.
  AssertEqual '''''', string(g:Callback)

  AssertEqual type(function('type')), type(g:WaitCallback)
  AssertEqual 'definition', g:capability_checked
  call call(g:WaitCallback, [g:conn_id, '/foo/bar'])

  AssertEqual
  \ 'function(''ale#definition#HandleLSPResponse'')',
  \ string(g:Callback)

  AssertEqual
  \ [
  \   [1, 'textDocument/didChange', {
  \     'textDocument': {
  \         'uri': ale#path#ToURI(expand('%:p')),
  \         'version': g:ale_lsp_next_version_id - 1,
  \     },
  \     'contentChanges': [{'text': join(getline(1, '$'), "\n") . "\n"}]
  \   }],
  \   [0, 'textDocument/definition', {
  \   'textDocument': {'uri': ale#path#ToURI(expand('%:p'))},
  \   'position': {'line': 0, 'character': 2},
  \   }],
  \ ],
  \ g:message_list

  AssertEqual {'42': {'open_in': 'tab'}}, ale#definition#GetMap()