Before: Save g:ale_completion_enabled Save g:ale_completion_delay Save g:ale_completion_max_suggestions Save &l:omnifunc Save &l:completeopt let g:test_vars = { \ 'feedkeys_calls': [], \} call ale#completion#Nop() function! ale#completion#FeedKeys(string, mode) abort call add(g:test_vars.feedkeys_calls, [a:string, a:mode]) endfunction After: Restore unlet! g:test_vars unlet! b:ale_old_omnifunc unlet! b:ale_old_completopt unlet! b:ale_completion_info unlet! b:ale_completion_response unlet! b:ale_completion_parser runtime autoload/ale/completion.vim runtime autoload/ale/lsp.vim if g:ale_completion_enabled call ale#completion#Enable() else call ale#completion#Disable() endif Execute(TypeScript completions responses should be parsed correctly): AssertEqual [], \ ale#completion#ParseTSServerCompletions({ \ 'body': [], \}) AssertEqual ['foo', 'bar', 'baz'], \ ale#completion#ParseTSServerCompletions({ \ 'body': [ \ {'name': 'foo'}, \ {'name': 'bar'}, \ {'name': 'baz'}, \ ], \}) Execute(TypeScript completion details responses should be parsed correctly): AssertEqual \ [ \ { \ 'word': 'abc', \ 'menu': '(property) Foo.abc: number', \ 'info': '', \ 'kind': 'f', \ 'icase': 1, \ }, \ { \ 'word': 'def', \ 'menu': '(property) Foo.def: number', \ 'info': 'foo bar baz', \ 'kind': 'f', \ 'icase': 1, \ }, \ ], \ ale#completion#ParseTSServerCompletionEntryDetails({ \ 'body': [ \ { \ 'name': 'abc', \ 'kind': 'parameterName', \ 'displayParts': [ \ {'text': '('}, \ {'text': 'property'}, \ {'text': ')'}, \ {'text': ' '}, \ {'text': 'Foo'}, \ {'text': '.'}, \ {'text': 'abc'}, \ {'text': ':'}, \ {'text': ' '}, \ {'text': 'number'}, \ ], \ }, \ { \ 'name': 'def', \ 'kind': 'parameterName', \ 'displayParts': [ \ {'text': '('}, \ {'text': 'property'}, \ {'text': ')'}, \ {'text': ' '}, \ {'text': 'Foo'}, \ {'text': '.'}, \ {'text': 'def'}, \ {'text': ':'}, \ {'text': ' '}, \ {'text': 'number'}, \ ], \ 'documentation': [ \ {'text': 'foo'}, \ {'text': ' '}, \ {'text': 'bar'}, \ {'text': ' '}, \ {'text': 'baz'}, \ ], \ }, \ ], \}) Execute(Prefix filtering should work for Lists of strings): AssertEqual \ ['FooBar', 'foo'], \ ale#completion#Filter(['FooBar', 'FongBar', 'baz', 'foo'], 'foo') AssertEqual \ ['FooBar', 'FongBar', 'baz', 'foo'], \ ale#completion#Filter(['FooBar', 'FongBar', 'baz', 'foo'], '.') Execute(Prefix filtering should work for completion items): AssertEqual \ [{'word': 'FooBar'}, {'word': 'foo'}], \ ale#completion#Filter( \ [ \ {'word': 'FooBar'}, \ {'word': 'FongBar'}, \ {'word': 'baz'}, \ {'word': 'foo'}, \ ], \ 'foo' \ ) AssertEqual \ [ \ {'word': 'FooBar'}, \ {'word': 'FongBar'}, \ {'word': 'baz'}, \ {'word': 'foo'}, \ ], \ ale#completion#Filter( \ [ \ {'word': 'FooBar'}, \ {'word': 'FongBar'}, \ {'word': 'baz'}, \ {'word': 'foo'}, \ ], \ '.' \ ) Execute(The right message sent to the tsserver LSP when the first completion message is received): " The cursor position needs to match what was saved before. call setpos('.', [bufnr(''), 1, 1, 0]) let b:ale_completion_info = { \ 'conn_id': 123, \ 'prefix': 'f', \ 'request_id': 4, \ 'line': 1, \ 'column': 1, \} " We should only show up to this many suggestions. let g:ale_completion_max_suggestions = 3 " Replace the Send function for LSP, so we can monitor calls to it. function! ale#lsp#Send(conn_id, message) abort let g:test_vars.message = a:message endfunction " Handle the response for completions. call ale#completion#HandleTSServerLSPResponse(123, { \ 'request_seq': 4, \ 'command': 'completions', \ 'body': [ \ {'name': 'Baz'}, \ {'name': 'dingDong'}, \ {'name': 'Foo'}, \ {'name': 'FooBar'}, \ {'name': 'frazzle'}, \ {'name': 'FFS'}, \ ], \}) " The entry details messages should have been sent. AssertEqual \ [ \ 0, \ 'ts@completionEntryDetails', \ { \ 'file': expand('%:p'), \ 'entryNames': ['Foo', 'FooBar', 'frazzle'], \ 'offset': 1, \ 'line': 1, \ }, \ ], \ g:test_vars.message Given typescript(): let abc = y. let foo = ab let foo = (ab) Execute(Completion should be done after dots in TypeScript): AssertEqual '.', ale#completion#GetPrefix(&filetype, 1, 13) Execute(Completion should be done after words in TypeScript): AssertEqual 'ab', ale#completion#GetPrefix(&filetype, 2, 13) Execute(Completion should be done after words in parens in TypeScript): AssertEqual 'ab', ale#completion#GetPrefix(&filetype, 3, 14) Execute(Completion should not be done after parens in TypeScript): AssertEqual '', ale#completion#GetPrefix(&filetype, 3, 15) Execute(ale#completion#Show() should remember the omnifunc setting and replace it): let &l:omnifunc = 'FooBar' call ale#completion#Show('Response', 'Parser') AssertEqual 'FooBar', b:ale_old_omnifunc AssertEqual 'ale#completion#OmniFunc', &l:omnifunc Execute(ale#completion#Show() should remember the completeopt setting and replace it): let &l:completeopt = 'menu' call ale#completion#Show('Response', 'Parser') AssertEqual 'menu', b:ale_old_completopt AssertEqual 'menu,menuone,preview,noselect,noinsert', &l:completeopt Execute(ale#completion#OmniFunc() should also remember the completeopt setting and replace it): let &l:completeopt = 'menu' call ale#completion#OmniFunc(0, '') AssertEqual 'menu', b:ale_old_completopt AssertEqual 'menu,menuone,preview,noselect,noinsert', &l:completeopt Execute(ale#completion#Show() should make the correct feedkeys() call): call ale#completion#Show('Response', 'Parser') AssertEqual [["\\", 'n']], g:test_vars.feedkeys_calls Execute(ale#completion#Show() should set up the response and parser): call ale#completion#Show('Response', 'Parser') AssertEqual 'Response', b:ale_completion_response AssertEqual 'Parser', b:ale_completion_parser Execute(ale#completion#Done() should restore old omnifunc values): let b:ale_old_omnifunc = 'FooBar' call ale#completion#Done() " We reset the old omnifunc setting and remove the buffer variable. AssertEqual 'FooBar', &l:omnifunc Assert !has_key(b:, 'ale_old_omnifunc') Execute(ale#completion#Done() should restore the old completeopt setting): let b:ale_old_completopt = 'menu' let &l:completeopt = 'menu,menuone,preview,noselect,noinsert' call ale#completion#Done() AssertEqual 'menu', &l:completeopt Assert !has_key(b:, 'ale_old_completopt') Execute(ale#completion#Done() should leave settings alone when none were remembered): let &l:omnifunc = 'BazBoz' let &l:completeopt = 'menu' call ale#completion#Done() AssertEqual 'BazBoz', &l:omnifunc AssertEqual 'menu', &l:completeopt Execute(The completion request_id should be reset when queuing again): let b:ale_completion_info = {'request_id': 123} let g:ale_completion_delay = 0 call ale#completion#Queue() sleep 1m AssertEqual 0, b:ale_completion_info.request_id Execute(b:ale_completion_info should be set up correctly when requesting completions): call setpos('.', [bufnr(''), 3, 14, 0]) call ale#completion#GetCompletions() AssertEqual \ { \ 'request_id': 0, \ 'conn_id': 0, \ 'column': 14, \ 'line': 3, \ 'prefix': 'ab', \ }, \ b:ale_completion_info Execute(ale#completion#GetCompletions should be called when the cursor position stays the same): let g:test_vars.get_completions_called = 0 " We just want to check if the function is called. function! ale#completion#GetCompletions() let g:test_vars.get_completions_called = 1 endfunction let g:ale_completion_delay = 0 call ale#completion#Queue() sleep 1m Assert g:test_vars.get_completions_called Execute(ale#completion#GetCompletions should not be called when the cursor position changes): call setpos('.', [bufnr(''), 1, 2, 0]) let g:test_vars.get_completions_called = 0 " We just want to check if the function is called. function! ale#completion#GetCompletions() let g:test_vars.get_completions_called = 1 endfunction let g:ale_completion_delay = 0 call ale#completion#Queue() " Change the cursor position before the callback is triggered. call setpos('.', [bufnr(''), 2, 2, 0]) sleep 1m Assert !g:test_vars.get_completions_called