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

  let g:old_filename = expand('%:p')
  let g:Callback = ''
  let g:expr_list = []
  let g:message_list = []
  let g:preview_called = 0
  let g:item_list = []
  let g:capability_checked = ''
  let g:WaitCallback = v:null

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

  function! ale#lsp_linter#StartLSP(buffer, linter) abort
    let l:conn = ale#lsp#NewConnection({})
    let l:conn.id = 347
    let l:conn.open_documents = {a:buffer : -1}

    return {
    \ 'buffer': a:buffer,
    \ 'connection_id': 347,
    \ 'project_root': '/foo/bar',
    \ 'language_id': 'python',
    \}
  endfunction

  function! ale#lsp#WaitForCapability(conn_id, project_root, 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, root) 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

  function! ale#preview#ShowSelection(item_list) abort
    let g:preview_called = 1
    let g:item_list = a:item_list
  endfunction

After:
  call ale#lsp#RemoveConnectionWithID(347)
  call ale#references#SetMap({})
  call ale#test#RestoreDirectory()
  call ale#linter#Reset()

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

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

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

Execute(Failed reference responses should be handled correctly):
  call ale#references#SetMap({3: {}})
  call ale#references#HandleTSServerResponse(
  \ 1,
  \ {'command': 'references', 'request_seq': 3}
  \)
  AssertEqual {}, ale#references#GetMap()

Given typescript(Some typescript file):
  foo
  somelongerline
  bazxyzxyzxyz

Execute(Results should be shown for tsserver responses):
  call ale#references#SetMap({3: {}})
  call ale#references#HandleTSServerResponse(1, {
  \ 'command': 'references',
  \ 'request_seq': 3,
  \ 'success': v:true,
  \ 'body': {
  \   'symbolStartOffset': 9,
  \   'refs': [
  \     {
  \       'file': '/foo/bar/app.ts',
  \       'isWriteAccess': v:true,
  \       'lineText': 'import {doSomething} from ''./whatever''',
  \       'end': {'offset': 24, 'line': 9},
  \       'start': {'offset': 9, 'line': 9},
  \       'isDefinition': v:true,
  \     },
  \     {
  \       'file': '/foo/bar/app.ts',
  \       'isWriteAccess': v:false,
  \       'lineText': '  doSomething()',
  \       'end': {'offset': 18, 'line': 804},
  \       'start': {'offset': 3, 'line': 804},
  \       'isDefinition': v:false,
  \     },
  \     {
  \       'file': '/foo/bar/other/app.ts',
  \       'isWriteAccess': v:false,
  \       'lineText': '  doSomething()',
  \       'end': {'offset': 18, 'line': 51},
  \       'start': {'offset': 3, 'line': 51},
  \       'isDefinition': v:false,
  \     },
  \   ],
  \   'symbolDisplayString': 'import doSomething',
  \   'symbolName': 'doSomething()',
  \ },
  \})

  AssertEqual
  \ [
  \   {'filename': '/foo/bar/app.ts', 'column': 9, 'line': 9},
  \   {'filename': '/foo/bar/app.ts', 'column': 3, 'line': 804},
  \   {'filename': '/foo/bar/other/app.ts', 'column': 3, 'line': 51},
  \ ],
  \ g:item_list
  AssertEqual {}, ale#references#GetMap()

Execute(The preview window should not be opened for empty tsserver responses):
  call ale#references#SetMap({3: {}})
  call ale#references#HandleTSServerResponse(1, {
  \ 'command': 'references',
  \ 'request_seq': 3,
  \ 'success': v:true,
  \ 'body': {
  \   'symbolStartOffset': 9,
  \   'refs': [
  \   ],
  \   'symbolDisplayString': 'import doSomething',
  \   'symbolName': 'doSomething()',
  \ },
  \})

  Assert !g:preview_called
  AssertEqual {}, ale#references#GetMap()
  AssertEqual ['echom ''No references found.'''], g:expr_list

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

  ALEFindReferences

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

  AssertEqual type(function('type')), type(g:WaitCallback)
  AssertEqual 'references', g:capability_checked
  call call(g:WaitCallback, [347, '/foo/bar'])

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

Given python(Some Python file):
  foo
  somelongerline
  bazxyzxyzxyz

Execute(LSP reference responses should be handled):
  call ale#references#SetMap({3: {}})
  call ale#references#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': 7, 'character': 15},
  \       },
  \     },
  \   ],
  \ }
  \)

  AssertEqual
  \ [
  \   {
  \     'filename': ale#path#Simplify(g:dir . '/completion_dummy_file'),
  \     'line': 3,
  \     'column': 8,
  \   },
  \   {
  \     'filename': ale#path#Simplify(g:dir . '/other_file'),
  \     'line': 8,
  \     'column': 16,
  \   },
  \ ],
  \ g:item_list
  AssertEqual {}, ale#references#GetMap()

Execute(Preview windows should not be opened for empty LSP reference responses):
  call ale#references#SetMap({3: {}})
  call ale#references#HandleLSPResponse(
  \ 1,
  \ {
  \   'id': 3,
  \   'result': [
  \   ],
  \ }
  \)

  Assert !g:preview_called
  AssertEqual {}, ale#references#GetMap()
  AssertEqual ['echom ''No references found.'''], g:expr_list

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

  ALEFindReferences

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

  AssertEqual type(function('type')), type(g:WaitCallback)
  AssertEqual 'references', g:capability_checked
  call call(g:WaitCallback, [347, '/foo/bar'])

  AssertEqual
  \ 'function(''ale#references#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/references', {
  \   'textDocument': {'uri': ale#path#ToURI(expand('%:p'))},
  \   'position': {'line': 0, 'character': 3},
  \   'context': {'includeDeclaration': v:false},
  \   }],
  \ ],
  \ g:message_list

  AssertEqual {'42': {}}, ale#references#GetMap()