local define = require 'proto.define'
local config = require 'config'

config.set(nil, 'Lua.completion.callSnippet',    'Both')
config.set(nil, 'Lua.completion.keywordSnippet', 'Both')
config.set(nil, 'Lua.completion.workspaceWord',  false)
config.set(nil, 'Lua.completion.showWord',       'Enable')

TEST [[
local zabcde
za<??>
]]
{
    {
        label = 'zabcde',
        kind = define.CompletionItemKind.Variable,
    }
}

TEST [[
local zabcdefg
local zabcde
zabcde<??>
]]
{
    {
        label = 'zabcde',
        kind = define.CompletionItemKind.Variable,
    },
    {
        label = 'zabcdefg',
        kind = define.CompletionItemKind.Variable,
    },
}

TEST [[
local zabcdefg
za<??>
local zabcde
]]
{
    {
        label = 'zabcdefg',
        kind = define.CompletionItemKind.Variable,
    },
    {
        label = 'zabcde',
        kind = define.CompletionItemKind.Text,
    },
}

TEST [[
local zabcde
zace<??>
]]
{
    {
        label = 'zabcde',
        kind = define.CompletionItemKind.Variable,
    }
}

TEST [[
ZABC = x
local zabc
zac<??>
]]
{
    {
        label = 'zabc',
        kind = define.CompletionItemKind.Variable,
    },
    {
        label = 'ZABC',
        kind = define.CompletionItemKind.Field,
    },
}

config.set(nil, 'Lua.completion.callSnippet',    'Disable')
TEST [[
ass<??>
]]
{
    {
        label = 'assert(v, message, ...)',
        kind  = define.CompletionItemKind.Function,
    },
}

config.set(nil, 'Lua.completion.callSnippet',    'Replace')
TEST [[
ass<??>
]]
{
    {
        label = 'assert(v, message, ...)',
        kind  = define.CompletionItemKind.Function,
    },
}

config.set(nil, 'Lua.completion.callSnippet',    'Both')
TEST [[
ass<??>
]]
{
    {
        label = 'assert(v, message, ...)',
        kind  = define.CompletionItemKind.Function,
    },
    {
        label = 'assert(v, message, ...)',
        kind  = define.CompletionItemKind.Snippet,
    },
}

TEST [[
local assert = 1
ass<??>
]]
{
    {
        label = 'assert',
        kind  = define.CompletionItemKind.Variable,
    },
}

TEST [[
local assert = 1
_G.ass<??>
]]
{
    {
        label = 'assert(v, message, ...)',
        kind  = define.CompletionItemKind.Function,
    },
    {
        label = 'assert(v, message, ...)',
        kind  = define.CompletionItemKind.Snippet,
    },
}

TEST [[
local function ffff(a, b)
end
ff<??>
]]
{
    {
        label = 'ffff(a, b)',
        kind  = define.CompletionItemKind.Function,
    },
    {
        label = 'ffff(a, b)',
        kind  = define.CompletionItemKind.Snippet,
    }
}

TEST [[
local zabc = 1
z<??>
]]
{
    {
        label = 'zabc',
        kind = define.CompletionItemKind.Variable,
    }
}

TEST [[
local zabc = 1.0
z<??>
]]
{
    {
        label = 'zabc',
        kind = define.CompletionItemKind.Variable,
    }
}

TEST [[
local t = {
    abc = 1,
}
t.ab<??>
]]
{
    {
        label = 'abc',
        kind = define.CompletionItemKind.Enum,
    }
}

TEST [[
local t = {
    abc = 1,
}
local n = t.abc
t.ab<??>
]]
{
    {
        label = 'abc',
        kind = define.CompletionItemKind.Enum,
    }
}

TEST [[
local mt = {}
mt.ggg = 1
function mt:get(a, b)
    return 1
end
mt:g<??>
]]
{
    {
        label = 'get(a, b)',
        kind = define.CompletionItemKind.Method,
    },
    {
        label = 'get(a, b)',
        kind = define.CompletionItemKind.Snippet,
    },
    {
        label = 'ggg',
        kind  = define.CompletionItemKind.Text,
    }
}

TEST [[
loc<??>
]]
{
    {
        label = 'local',
        kind = define.CompletionItemKind.Keyword,
    },
    {
        label = 'local function',
        kind = define.CompletionItemKind.Snippet,
    },
}

IgnoreFunction = true
TEST [[
do<??>
]]
{
    {
        label = 'do',
        kind = define.CompletionItemKind.Keyword,
    },
    {
        label = 'do .. end',
        kind = define.CompletionItemKind.Snippet,
    },
}

TEST [[
while true d<??>
]]
{
    {
        label = 'do',
        kind = define.CompletionItemKind.Keyword,
    },
    {
        label = 'do .. end',
        kind = define.CompletionItemKind.Snippet,
    },
}

TEST [[
results<??>
]]
(nil)

TEST [[
result<??>
local results
]]
(EXISTS)

TEST [[
local a<??>

local function f(fff)
    fff = ast
    fff = ast
    fff = ast
    fff = ast
    fff = ast
    fff = ast
end
]]
{
    {
        label = 'ast',
        kind = define.CompletionItemKind.Variable,
    }
}

TEST [[
t.a = {}
t.b = {}
t.<??>
]]
{
    {
        label = 'a',
        kind = define.CompletionItemKind.Field,
    },
    {
        label = 'b',
        kind = define.CompletionItemKind.Field,
    },
}

TEST [[
t.a = {}
t.b = {}
t.   <??>
]]
{
    {
        label = 'a',
        kind = define.CompletionItemKind.Field,
    },
    {
        label = 'b',
        kind = define.CompletionItemKind.Field,
    },
}

IgnoreFunction = false
TEST [[
t.a = {}
function t:b()
end
t:<??>
]]
{
    {
        label = 'b()',
        kind = define.CompletionItemKind.Method,
    },
    {
        label = 'b()',
        kind = define.CompletionItemKind.Snippet,
    },
}

TEST [[
local t = {
    a = {},
}
t.<??>
xxx()
]]
{
    {
        label = 'a',
        kind = define.CompletionItemKind.Field,
    },
}

TEST [[
(''):<??>
]]
(EXISTS)

TEST [[
local zzz

return 'aa' .. zz<??>
]]
{
    {
        label = 'zzz',
        kind = define.CompletionItemKind.Variable,
    },
}

TEST 'local s = "a:<??>"' (nil)

TEST 'debug.<??>'
(EXISTS)

IgnoreFunction = true
TEST [[
local xxxx = {
    xxyy = 1,
    xxzz = 2,
}

local t = {
    x<??>
}
]]
{
    {
        label = 'xxxx',
        kind = define.CompletionItemKind.Variable,
    },
    {
        label = 'xxyy',
        kind = define.CompletionItemKind.Property,
    },
    {
        label = 'xxzz',
        kind = define.CompletionItemKind.Property,
    },
}

TEST [[
print(ff2)
local faa
local f<??>
print(fff)
]]
{
    {
        label = 'function',
        kind = define.CompletionItemKind.Keyword,
    },
    {
        label = 'function ()',
        kind = define.CompletionItemKind.Snippet,
    },
    {
        label = 'fff',
        kind = define.CompletionItemKind.Variable,
    },
    {
        label = 'ff2',
        kind = define.CompletionItemKind.Text,
    },
    {
        label = 'faa',
        kind = define.CompletionItemKind.Text,
    },
}

TEST [[
local function f(ff<??>)
    print(fff)
end
]]
{
    {
        label = 'fff',
        kind = define.CompletionItemKind.Variable,
    },
}

TEST [[
collectgarbage(<??>)
]]
(EXISTS)

TEST [[
collectgarbage('<??>')
]]
{
    {
        label       = "'collect'",
        kind        = define.CompletionItemKind.EnumMember,
        textEdit    = {
            start   = 15,
            finish  = 17,
            newText = "'collect'",
        },
    },
    {
        label       = "'stop'",
        kind        = define.CompletionItemKind.EnumMember,
        textEdit    = {
            start   = 15,
            finish  = 17,
            newText = "'stop'",
        },
    },
    {
        label       = "'restart'",
        kind        = define.CompletionItemKind.EnumMember,
        textEdit    = {
            start   = 15,
            finish  = 17,
            newText = "'restart'",
        },
    },
    {
        label       = "'count'",
        kind        = define.CompletionItemKind.EnumMember,
        textEdit    = {
            start   = 15,
            finish  = 17,
            newText = "'count'",
        },
    },
    {
        label       = "'step'",
        kind        = define.CompletionItemKind.EnumMember,
        textEdit    = {
            start   = 15,
            finish  = 17,
            newText = "'step'",
        },
    },
    {
        label       = "'isrunning'",
        kind        = define.CompletionItemKind.EnumMember,
        textEdit    = {
            start   = 15,
            finish  = 17,
            newText = "'isrunning'",
        },
    },
    {
        label       = "'incremental'",
        kind        = define.CompletionItemKind.EnumMember,
        textEdit    = {
            start   = 15,
            finish  = 17,
            newText = "'incremental'",
        },
    },
    {
        label       = "'generational'",
        kind        = define.CompletionItemKind.EnumMember,
        textEdit    = {
            start   = 15,
            finish  = 17,
            newText = "'generational'",
        },
    },
}

TEST [[
io.read(<??>)
]]
{
    {
        label       = '"n"',
        kind        = define.CompletionItemKind.EnumMember,
    },
    {
        label       = '"a"',
        kind        = define.CompletionItemKind.EnumMember,
    },
    {
        label       = '"l"',
        kind        = define.CompletionItemKind.EnumMember,
    },
    {
        label       = '"L"',
        kind        = define.CompletionItemKind.EnumMember,
    },
}

TEST [[
io.open('', <??>)
]]
(EXISTS)

TEST [[
local function f(a, <??>)
end
]]
(nil)

TEST [[
self.results.list[#<??>]
]]
{
    {
        label = '#self.results.list+1',
        kind = define.CompletionItemKind.Snippet,
        textEdit = {
            start = 18,
            finish = 20,
            newText = '#self.results.list+1] = ',
        },
    },
}

TEST [[
self.results.list[#<??>]
local n = 1
]]
{
    {
        label = '#self.results.list+1',
        kind = define.CompletionItemKind.Snippet,
        textEdit = {
            start = 18,
            finish = 20,
            newText = '#self.results.list+1] = ',
        },
    },
}

TEST [[
self.results.list[#<??>] = 1
]]
{
    {
        label = '#self.results.list+1',
        kind = define.CompletionItemKind.Snippet,
        textEdit = {
            start = 18,
            finish = 20,
            newText = '#self.results.list+1]',
        },
    },
}

TEST [[
self.results.list[#self.re<??>]
]]
{
    {
        label = '#self.results.list+1',
        kind = define.CompletionItemKind.Snippet,
        textEdit = {
            start = 18,
            finish = 27,
            newText = '#self.results.list+1] = ',
        },
    },
    {
        label = 'results',
        kind = define.CompletionItemKind.Text,
    },
}

TEST [[
fff[#ff<??>]
]]
{
    {
        label = '#fff+1',
        kind = define.CompletionItemKind.Snippet,
        textEdit = {
            start = 4,
            finish = 8,
            newText = '#fff+1] = ',
        },
    },
    {
        label = 'fff',
        kind = define.CompletionItemKind.Text,
    }
}

TEST [[
local _ = fff.kkk[#<??>]
]]
{
    {
        label = '#fff.kkk',
        kind = define.CompletionItemKind.Snippet,
        textEdit = {
            start = 18,
            finish = 20,
            newText = '#fff.kkk]',
        },
    },
}

TEST [[
fff.kkk[#<??>].yy
]]
{
    {
        label = '#fff.kkk',
        kind = define.CompletionItemKind.Snippet,
        textEdit = {
            start = 8,
            finish = 10,
            newText = '#fff.kkk]',
        },
    },
}

TEST [[
local t = {
    a = 1,
}

t .    <??>
]]
(EXISTS)

TEST [[
local t = {
    a = 1,
}

t .    <??> b
]]
(EXISTS)

TEST [[
local t = {
    a = 1,
}

t <??>
]]
(nil)

TEST [[
local t = {
    a = 1,
}

t <??>.
]]
(nil)

TEST [[
local xxxx
xxxx<??>
]]
{
    {
        label = 'xxxx',
        kind = define.CompletionItemKind.Variable,
    },
}

TEST [[
local xxxx
local XXXX
xxxx<??>
]]
{
    {
        label = 'XXXX',
        kind = define.CompletionItemKind.Variable,
    },
    {
        label = 'xxxx',
        kind = define.CompletionItemKind.Variable,
    },
}

TEST [[
local t = {
    xxxxx = 1,
}
xx<??>
]]
{
    {
        label = 'xxxxx',
        kind = define.CompletionItemKind.Text,
    },
}

TEST [[
local index
tbl[inde<??>]
]]
{
    {
        label = 'index',
        kind = define.CompletionItemKind.Variable,
    },
}

TEST [[
return function ()
    local t = {
        a = {},
        b = {},
    }
    t.<??>
end
]]
{
    {
        label = 'a',
        kind = define.CompletionItemKind.Field,
    },
    {
        label = 'b',
        kind = define.CompletionItemKind.Field,
    },
}

TEST [[
local ast = 1
local t = 'as<??>'
local ask = 1
]]
(EXISTS)

TEST [[
local add

function f(ad<??>)
    local _ = add
end
]]
{
    {
        label = 'add',
        kind = define.CompletionItemKind.Variable,
    },
}

TEST [[
function table.i<??>
]]
(EXISTS)

TEST [[
do
    xx.<??>
end
]]
(nil)

TEST [[
print(io.<??>)
]]
(EXISTS)

require 'config'.set(nil, 'Lua.runtime.version', 'Lua 5.4')
--TEST [[
--local <??>
--]]
--{
--    {
--        label = '<toclose>',
--        kind = define.CompletionItemKind.Keyword,
--    },
--    {
--        label = '<const>',
--        kind = define.CompletionItemKind.Keyword,
--    },
--}
--
--TEST [[
--local <toc<??>
--]]
--{
--    {
--        label = '<toclose>',
--        kind = define.CompletionItemKind.Keyword,
--    }
--}

TEST [[
local mt = {}
mt.__index = mt
local t = setmetatable({}, mt)

t.<??>
]]
{
    {
        label = '__index',
        kind = define.CompletionItemKind.Field,
    }
}

TEST [[
local elseaaa
ELSE = 1
if a then
else<??>
]]
{
    {
        label = 'else',
        kind = define.CompletionItemKind.Keyword,
    },
    {
        label = 'elseif',
        kind = define.CompletionItemKind.Keyword,
    },
    {
        label = 'elseif .. then',
        kind = define.CompletionItemKind.Snippet,
    },
    {
        label = 'elseaaa',
        kind = define.CompletionItemKind.Variable,
    },
    {
        label = 'ELSE',
        kind = define.CompletionItemKind.Enum,
    },
}

Cared['insertText'] = true
IgnoreFunction = false
TEST [[
local xpcal
xpcal<??>
]]
{
    {
        label = 'xpcal',
        kind = define.CompletionItemKind.Variable,
    },
    {
        label = 'xpcall(f, msgh, arg1, ...)',
        kind = define.CompletionItemKind.Function,
        insertText = EXISTS,
    },
    {
        label = 'xpcall(f, msgh, arg1, ...)',
        kind = define.CompletionItemKind.Snippet,
        insertText = EXISTS,
    },
}

TEST [[
function mt:f(a, b, c)
end

mt:f<??>
]]
{
    {
        label = 'f(a, b, c)',
        kind = define.CompletionItemKind.Method,
        insertText = EXISTS,
    },
    {
        label = 'f(a, b, c)',
        kind = define.CompletionItemKind.Snippet,
        insertText = 'f(${1:a}, ${2:b}, ${3:c})',
    },
}

TEST [[
function<??>
]]
{
    {
        label = 'function',
        kind  = define.CompletionItemKind.Keyword,
    },
    {
        label = 'function ()',
        kind  = define.CompletionItemKind.Snippet,
        insertText = "\z
function $1($2)\
\t$0\
end",
    },
}

TEST [[
local t = function<??>
]]
{
    {
        label = 'function',
        kind  = define.CompletionItemKind.Keyword,
    },
    {
        label = 'function ()',
        kind  = define.CompletionItemKind.Snippet,
        insertText = "\z
function ($1)\
\t$0\
end",
    },
}
Cared['insertText'] = false
IgnoreFunction = true

TEST [[
local function f()
    if a then
    else<??>
end
]]
{
    {
        label = 'else',
        kind = define.CompletionItemKind.Keyword,
    },
    {
        label = 'elseif',
        kind = define.CompletionItemKind.Keyword,
    },
    {
        label = 'elseif .. then',
        kind = define.CompletionItemKind.Snippet,
    },
}

TEST [[
local t = {
    ['a.b.c'] = {}
}

t.<??>
]]
{
    {
        label = "'a.b.c'",
        kind = define.CompletionItemKind.Field,
        textEdit = {
            start = 40002,
            finish = 40002,
            newText = "['a.b.c']",
        },
        additionalTextEdits = {
            {
                start   = 40001,
                finish  = 40002,
                newText = '',
            },
        },
    }
}

TEST [[
local t = {
    ['a.b.c'] = {}
}

t.   <??>
]]
{
    {
        label = "'a.b.c'",
        kind = define.CompletionItemKind.Field,
        textEdit = {
            start = 40005,
            finish = 40005,
            newText = "['a.b.c']",
        },
        additionalTextEdits = {
            {
                start   = 40001,
                finish  = 40002,
                newText = '',
            },
        },
    }
}

TEST [[
local t = {
    ['a.b.c'] = {}
}

t['<??>']
]]
{
    {
        label = "'a.b.c'",
        kind = define.CompletionItemKind.Field,
        textEdit = {
            start = 40003,
            finish = 40003,
            newText = 'a.b.c',
        }
    }
}

TEST [[
_G['z.b.c'] = {}

z<??>
]]
{
    {
        label = "'z.b.c'",
        kind = define.CompletionItemKind.Field,
        textEdit = {
            start = 20000,
            finish = 20001,
            newText = "_ENV['z.b.c']",
        },
    },
}

config.set(nil, 'Lua.runtime.version', 'Lua 5.1')

TEST [[
_G['z.b.c'] = {}

z<??>
]]
{
    {
        label = "'z.b.c'",
        kind = define.CompletionItemKind.Field,
        textEdit = {
            start = 20000,
            finish = 20001,
            newText = "_G['z.b.c']",
        },
    },
}

config.set(nil, 'Lua.runtime.version', 'Lua 5.4')

TEST [[
中文字段 = 1

中文<??>
]]
{
    {
        label = '中文字段',
        kind = define.CompletionItemKind.Enum,
        textEdit = {
            start = 20000,
            finish = 20006,
            newText = '_ENV["中文字段"]',
        },
    },
}

config.set(nil, 'Lua.runtime.unicodeName', true)
TEST [[
中文字段 = 1

中文<??>
]]
{
    {
        label = '中文字段',
        kind = define.CompletionItemKind.Enum,
    },
}
config.set(nil, 'Lua.runtime.unicodeName', false)

TEST [[
io.close(1, <??>)
]]
(nil)

TEST [[
io<??>
]]
(EXISTS)

IgnoreFunction = false
TEST [[
loadstring<??>
]]
{
    {
        label = 'loadstring(text, chunkname)',
        kind  = define.CompletionItemKind.Function,
        deprecated = true,
    },
    {
        label = 'loadstring(text, chunkname)',
        kind  = define.CompletionItemKind.Snippet,
        deprecated = true,
    },
}

--TEST [[
--bit32<??>
--]]
--{
--    {
--        label = 'bit32',
--        kind  = define.CompletionItemKind.Field,
--        deprecated = true,
--    },
--}

TEST [[
function loadstring()
end
loadstring<??>
]]
{
    {
        label = 'loadstring()',
        kind  = define.CompletionItemKind.Function,
    },
    {
        label = 'loadstring()',
        kind  = define.CompletionItemKind.Snippet,
    },
    {
        label = 'loadstring(text, chunkname)',
        deprecated = true,
        kind  = define.CompletionItemKind.Function,
    },
    {
        label = 'loadstring(text, chunkname)',
        deprecated = true,
        kind  = define.CompletionItemKind.Snippet,
    },
}

TEST [[
debug.setcsta<??>
]]
{
    {
        label = 'setcstacklimit(limit)',
        kind = define.CompletionItemKind.Function,
        deprecated = true,
    },
    {
        label = 'setcstacklimit(limit)',
        kind = define.CompletionItemKind.Snippet,
        deprecated = true,
    },
}

TEST [[
---@<??>
]]
(EXISTS)

TEST [[
---@cl<??>
]]
{
    {
        label = 'class',
        kind = define.CompletionItemKind.Event
    }
}

TEST [[
---@class ZABC
---@class ZBBC : Z<??>
]]
{
    {
        label = 'ZABC',
        kind = define.CompletionItemKind.Class,
    },
}

TEST [[
---@class ZBBC
---@class ZBBC : Z<??>
]]
(nil)

TEST [[
---@class ZABC
---@class ZBBC : <??>
]]
(function (results)
    local ok
    for _, res in ipairs(results) do
        if res.label == 'ZABC' then
            ok = true
        end
        if res.label == 'ZBBC' then
            error('ZBBC should not be here')
        end
    end
    assert(ok, 'ZABC should be here')
end)

TEST [[
---@class ZBBC
---@class ZBBC : <??>
]]
(function (results)
    for _, res in ipairs(results) do
        if res.label == 'ZBBC' then
            error('ZBBC should not be here')
        end
    end
end)

TEST [[
---@class ZABC
---@class ZABC
---@class ZBBC : Z<??>
]]
{
    {
        label = 'ZABC',
        kind = define.CompletionItemKind.Class,
    },
}

TEST [[
---@class zabc
local abcd
---@type za<??>
]]
{
    {
        label = 'zabc',
        kind = define.CompletionItemKind.Class,
    },
}

TEST [[
---@class abc
local abcd
---@type <??>
]]
(EXISTS)

TEST [[
---@class zabc
local abcd
---@type zxxx|z<??>
]]
{
    {
        label = 'zabc',
        kind = define.CompletionItemKind.Class,
    }
}

TEST [[
---@alias zabc zabb
---@type za<??>
]]
{
    {
        label = 'zabc',
        kind = define.CompletionItemKind.Class,
    },
}

TEST [[
---@class ZClass
---@param x ZC<??>
]]
{
    {
        label = 'ZClass',
        kind = define.CompletionItemKind.Class,
    },
}

Cared['insertText'] = true
TEST [[
---@param <??>
function f(a, b, c)
end
]]
{
    {
        label = 'a, b, c',
        kind = define.CompletionItemKind.Snippet,
        insertText = [[
a ${1:any}
---@param b ${2:any}
---@param c ${3:any}]]
    },
    {
        label = 'a',
        kind = define.CompletionItemKind.Interface,
    },
    {
        label = 'b',
        kind = define.CompletionItemKind.Interface,
    },
    {
        label = 'c',
        kind = define.CompletionItemKind.Interface,
    },
}

TEST [[
---@param <??>
function f(a, b, c) end

function f2(a) end
]]
{
    {
        label = 'a, b, c',
        kind = define.CompletionItemKind.Snippet,
        insertText = [[
a ${1:any}
---@param b ${2:any}
---@param c ${3:any}]]
    },
    {
        label = 'a',
        kind = define.CompletionItemKind.Interface,
    },
    {
        label = 'b',
        kind = define.CompletionItemKind.Interface,
    },
    {
        label = 'c',
        kind = define.CompletionItemKind.Interface,
    },
}

TEST [[
---@param aa<??>
function f(aaa, bbb, ccc)
end
]]
{
    {
        label = 'aaa',
        kind = define.CompletionItemKind.Interface,
    },
}

TEST [[
local function f()
    ---@param <??>
    function f(a, b, c)
    end
end
]]
{
    {
        label = 'a, b, c',
        kind = define.CompletionItemKind.Snippet,
        insertText = [[
a ${1:any}
---@param b ${2:any}
---@param c ${3:any}]]
    },
    {
        label = 'a',
        kind = define.CompletionItemKind.Interface,
    },
    {
        label = 'b',
        kind = define.CompletionItemKind.Interface,
    },
    {
        label = 'c',
        kind = define.CompletionItemKind.Interface,
    },
}

TEST [[
---@param <??>
function mt:f(a, b, c, ...)
end
]]
{
    {
        label = 'a, b, c, ...',
        kind = define.CompletionItemKind.Snippet,
        insertText = [[
a ${1:any}
---@param b ${2:any}
---@param c ${3:any}
---@param ... ${4:any}]],
    },
    {
        label = 'self',
        kind = define.CompletionItemKind.Interface,
    },
    {
        label = 'a',
        kind = define.CompletionItemKind.Interface,
    },
    {
        label = 'b',
        kind = define.CompletionItemKind.Interface,
    },
    {
        label = 'c',
        kind = define.CompletionItemKind.Interface,
    },
    {
        label = '...',
        kind = define.CompletionItemKind.Interface,
    },
}

TEST [[
---@param aaa <??>
function f(aaa, bbb, ccc)
end
]]
(EXISTS)

TEST [[
---@param xyz Class
---@param xxx Class
function f(x<??>)
]]
{
    {
        label = 'xyz, xxx',
        kind = define.CompletionItemKind.Snippet,
    },
    {
        label = 'xyz',
        kind = define.CompletionItemKind.Interface,
    },
    {
        label = 'xxx',
        kind = define.CompletionItemKind.Interface,
    },
}

TEST [[
---@param xyz Class
---@param xxx Class
function f(<??>
]]
{
    {
        label = 'xyz, xxx',
        kind = define.CompletionItemKind.Snippet,
    },
    {
        label = 'xyz',
        kind = define.CompletionItemKind.Interface,
    },
    {
        label = 'xxx',
        kind = define.CompletionItemKind.Interface,
    },
}

TEST [[
---@param xyz Class
---@param xxx Class
function f(<??>)
]]
{
    {
        label = 'xyz, xxx',
        kind = define.CompletionItemKind.Snippet,
    },
    {
        label = 'xyz',
        kind = define.CompletionItemKind.Interface,
    },
    {
        label = 'xxx',
        kind = define.CompletionItemKind.Interface,
    },
}

TEST [[
local function f()
    ---@t<??>
end
]]
{
    {
        label = 'type',
        kind = define.CompletionItemKind.Event,
    },
}

TEST [[
---@class Class
---@field name string
---@field id integer
local mt = {}
mt.<??>
]]
{
    {
        label = 'id',
        kind = define.CompletionItemKind.Field,
    },
    {
        label = 'name',
        kind = define.CompletionItemKind.Field,
    },
}

TEST [[
---@param x string | "AAA" | "BBB" | "CCC"
function f(y, x)
end

f(1, <??>)
]]
{
    {
        label = '"AAA"',
        kind = define.CompletionItemKind.EnumMember,
    },
    {
        label = '"BBB"',
        kind = define.CompletionItemKind.EnumMember,
    },
    {
        label = '"CCC"',
        kind = define.CompletionItemKind.EnumMember,
    }
}

TEST [[
---@param x string | "AAA" | "BBB" | "CCC"
function f(y, x)
end

f(1,<??>)
]]
{
    {
        label = '"AAA"',
        kind = define.CompletionItemKind.EnumMember,
    },
    {
        label = '"BBB"',
        kind = define.CompletionItemKind.EnumMember,
    },
    {
        label = '"CCC"',
        kind = define.CompletionItemKind.EnumMember,
    }
}

TEST [[
---@param x string | "AAA" | "BBB" | "CCC"
function f(x)
end

f(<??>)
]]
{
    {
        label = '"AAA"',
        kind = define.CompletionItemKind.EnumMember,
    },
    {
        label = '"BBB"',
        kind = define.CompletionItemKind.EnumMember,
    },
    {
        label = '"CCC"',
        kind = define.CompletionItemKind.EnumMember,
    }
}

TEST [[
---@alias Option string | "AAA" | "BBB" | "CCC"
---@param x Option
function f(x)
end

f(<??>)
]]
{
    {
        label = '"AAA"',
        kind = define.CompletionItemKind.EnumMember,
    },
    {
        label = '"BBB"',
        kind = define.CompletionItemKind.EnumMember,
    },
    {
        label = '"CCC"',
        kind = define.CompletionItemKind.EnumMember,
    }
}

TEST [[
---@param x string | "AAA" | "BBB" | "CCC"
function f(x)
end

f('<??>')
]]
{
    {
        label = "'AAA'",
        kind = define.CompletionItemKind.EnumMember,
        textEdit = EXISTS,
    },
    {
        label = "'BBB'",
        kind = define.CompletionItemKind.EnumMember,
        textEdit = EXISTS,
    },
    {
        label = "'CCC'",
        kind = define.CompletionItemKind.EnumMember,
        textEdit = EXISTS,
    }
}

TEST [[
---@alias Option string | "AAA" | "BBB" | "CCC"
---@param x Option[]
function f(x)
end

f({<??>})
]]
{
    {
        label = '"AAA"',
        kind = define.CompletionItemKind.EnumMember,
        textEdit = EXISTS
    },
    {
        label = '"BBB"',
        kind = define.CompletionItemKind.EnumMember,
        textEdit = EXISTS
    },
    {
        label = '"CCC"',
        kind = define.CompletionItemKind.EnumMember,
        textEdit = EXISTS
    }
}

TEST [[
---@alias Option string | "AAA" | "BBB" | "CCC"
---@param x Option[]
function f(x)
end

f({"<??>"})
]]
{
    {
        label = '"AAA"',
        kind = define.CompletionItemKind.EnumMember,
        textEdit = EXISTS
    },
    {
        label = '"BBB"',
        kind = define.CompletionItemKind.EnumMember,
        textEdit = EXISTS
    },
    {
        label = '"CCC"',
        kind = define.CompletionItemKind.EnumMember,
        textEdit = EXISTS
    }
}

TEST [[
---@alias Option string | "AAA" | "BBB" | "CCC"
---@param x Option[]
function f(x)
end

f(<??>)
]]
    (nil)

TEST [[
---@alias Option "AAA" | "BBB" | "CCC"

---@type Option[]
local l = {<??>}
]]
{
    {
        label = '"AAA"',
        kind = define.CompletionItemKind.EnumMember,
    },
    {
        label = '"BBB"',
        kind = define.CompletionItemKind.EnumMember,
    },
    {
        label = '"CCC"',
        kind = define.CompletionItemKind.EnumMember,
    }
}

TEST [[
---@alias Option "AAA" | "BBB" | "CCC"

---@type Option[]
local l = {"<??>"}
]]
{
    {
        label = '"AAA"',
        kind = define.CompletionItemKind.EnumMember,
        textEdit = EXISTS
    },
    {
        label = '"BBB"',
        kind = define.CompletionItemKind.EnumMember,
        textEdit = EXISTS
    },
    {
        label = '"CCC"',
        kind = define.CompletionItemKind.EnumMember,
        textEdit = EXISTS
    }
}

TEST [[
---@alias Option "AAA" | "BBB" | "CCC"

---@type Option[]
local l = <??>
]]
    (nil)

TEST [[
---@class OptionObj
---@field a boolean
---@field b boolean

---@type OptionObj[]
local l = { {<??>} }
]]
{
    {
        label = 'a',
        kind = define.CompletionItemKind.Property,
    },
    {
        label = 'b',
        kind = define.CompletionItemKind.Property,
    }
}

TEST [[
---@class OptionObj
---@field a boolean
---@field b boolean

---@type OptionObj[]
local l = { <??> }
]]
    (nil)

TEST [[
---@class OptionObj
---@field a boolean
---@field b boolean

---@type OptionObj[]
local l = <??>
]]
    (nil)

TEST [[
---@class OptionObj
---@field a boolean
---@field b boolean
---@field children OptionObj[]

---@type OptionObj[]
local l = { 
    { 
        a = true,
        children = { {<??>} }
    }
}
]]
{
    {
        label = 'a',
        kind = define.CompletionItemKind.Property,
    },
    {
        label = 'b',
        kind = define.CompletionItemKind.Property,
    },
    {
        label = 'children',
        kind = define.CompletionItemKind.Property,
    }
}

TEST [[
---@class OptionObj
---@field a boolean
---@field b boolean
---@field children OptionObj[]

---@type OptionObj[]
local l = { 
    { 
        children = {<??>}
    }
}
]]
(nil)

TEST [[
---@class OptionObj
---@field a boolean
---@field b boolean
---@field children OptionObj[]

---@type OptionObj[]
local l = { 
    { 
        children = <??>
    }
}
]]
(nil)

TEST [[
---@class OptionObj
---@field a boolean
---@field b boolean
---@param x OptionObj[]
function f(x)
end

f({ {<??>} })
]]
{
    {
        label = 'a',
        kind = define.CompletionItemKind.Property,
    },
    {
        label = 'b',
        kind = define.CompletionItemKind.Property,
    }
}

TEST [[
---@class OptionObj
---@field a boolean
---@field b boolean
---@param x OptionObj[]
function f(x)
end

f({<??>})
]]
    (nil)

TEST [[
---@class OptionObj
---@field a boolean
---@field b boolean
---@param x OptionObj[]
function f(x)
end

f(<??>)
]]
    (nil)

TEST [[
---this is
---a multi line
---comment
---@alias XXXX
---comment 1
---comment 1
---| 1
---comment 2
---comment 2
---| 2

---@param x XXXX
local function f(x)
end

f(<??>)
]]
{
    {
        label = '1',
        kind  = define.CompletionItemKind.EnumMember,
    },
    {
        label = '2',
        kind  = define.CompletionItemKind.EnumMember,
    },
}

TEST [[
---this is
---a multi line
---comment
---@alias XXXX
---comment 1
---comment 1
---| 1
---comment 2
---comment 2
---| 2
---@param x XXXX
local function f(x)
end


---comment 3
---comment 3
---| 3

f(<??>)
]]
{
    {
        label = '1',
        kind  = define.CompletionItemKind.EnumMember,
    },
    {
        label = '2',
        kind  = define.CompletionItemKind.EnumMember,
    },
}

TEST [[
---@param x function | 'function () end'
function f(x)
end

f(function ()
    <??>
end)
]]
(nil)

TEST [[
--- JustTest
---@param list table
---@param sep string
---@param i number
---@param j number
---@return string
local function zzzzz(list, sep, i, j) end

zzz<??>
]]
{
    {
        label = 'zzzzz(list, sep, i, j)',
        kind = define.CompletionItemKind.Function,
        insertText = EXISTS,
    },
    {
        label = 'zzzzz(list, sep, i, j)',
        kind = define.CompletionItemKind.Snippet,
        insertText = EXISTS,
    }
}

Cared['detail'] = true
Cared['description'] = true
TEST [[
--- abc
zzz = 1
zz<??>
]]
{
    {
        label = 'zzz',
        kind = define.CompletionItemKind.Enum,
        detail = 'integer = 1',
        description = [[
```lua
(global) zzz: integer = 1
```

---

 abc]],
    }
}

TEST [[
---@param x string
---| "选项1" # 注释1
---| "选项2" # 注释2
function f(x) end

f(<??>)
]]
{
    {
        label = '"选项1"',
        kind = define.CompletionItemKind.EnumMember,
        description = '注释1',
    },
    {
        label = '"选项2"',
        kind = define.CompletionItemKind.EnumMember,
        description = '注释2',
    },
}

TEST [[
utf8.charpatter<??>
]]
{
    {
        label       = 'charpattern',
        detail      = 'string',
        kind        = define.CompletionItemKind.Field,
        description = EXISTS,
    }
}

TEST [[
---@type "a"|"b"|"c"
local x

print(x == <??>)
]]
{
    {
        label  = '"a"',
        kind   = define.CompletionItemKind.EnumMember,
    },
    {
        label  = '"b"',
        kind   = define.CompletionItemKind.EnumMember,
    },
    {
        label  = '"c"',
        kind   = define.CompletionItemKind.EnumMember,
    },
}

TEST [[
---@type "a"|"b"|"c"
local x

x = <??>
]]
{
    {
        label  = '"a"',
        kind   = define.CompletionItemKind.EnumMember,
    },
    {
        label  = '"b"',
        kind   = define.CompletionItemKind.EnumMember,
    },
    {
        label  = '"c"',
        kind   = define.CompletionItemKind.EnumMember,
    },
}

TEST [[
---@type "a"|"b"|"c"
local x

print(x == '<??>')
]]
{
    {
        label  = "'a'",
        kind   = define.CompletionItemKind.EnumMember,
        textEdit = EXISTS,
    },
    {
        label  = "'b'",
        kind   = define.CompletionItemKind.EnumMember,
        textEdit = EXISTS,
    },
    {
        label  = "'c'",
        kind   = define.CompletionItemKind.EnumMember,
        textEdit = EXISTS,
    },
}

TEST [[
---@type "a"|"b"|"c"
local x

x = '<??>'
]]
{
    {
        label  = "'a'",
        kind   = define.CompletionItemKind.EnumMember,
        textEdit = EXISTS,
    },
    {
        label  = "'b'",
        kind   = define.CompletionItemKind.EnumMember,
        textEdit = EXISTS,
    },
    {
        label  = "'c'",
        kind   = define.CompletionItemKind.EnumMember,
        textEdit = EXISTS,
    },
}

TEST [[
local t = type()

print(t == <??>)
]]
(EXISTS)

TEST [[
if type(arg) == '<??>'
]]
(EXISTS)

TEST [[
if type(arg) == <??>
]]
(EXISTS)

TEST [[
---@type string
local s
s.<??>
]]
(EXISTS)

TEST [[
---@class C
local t

local vvv = assert(t)
vvv<??>
]]
{
    {
        label  = 'vvv',
        detail = 'C',
        kind   = define.CompletionItemKind.Variable,
        description = EXISTS,
    },
}

Cared['insertText'] = true
TEST [[
---@param callback fun(x: number, y: number):string
local function f(callback) end

f(<??>)
]]
{
    {
        label  = 'fun(x: number, y: number):string',
        kind   = define.CompletionItemKind.Function,
        insertText = "\z
function (${1:x}, ${2:y})\
\t$0\
end",
        description = "\z
```lua\
function (x, y)\
\t\
end\
```"
    },
}

Cared['insertText'] = nil

TEST [[
--<??>
]]
{
    {
        label = '#region',
        kind  = define.CompletionItemKind.Snippet,
    },
    {
        label = '#endregion',
        kind  = define.CompletionItemKind.Snippet,
    }
}

Cared['description'] = nil
Cared['detail'] = nil
TEST [[
---@class cc
---@field aaa number # a1
---@field bbb number # a2

---@param x cc
local function f(x) end

f({
    <??>
})
]]
{
    {
        label = 'aaa',
        kind  = define.CompletionItemKind.Property,
    },
    {
        label = 'bbb',
        kind  = define.CompletionItemKind.Property,
    },
}

TEST [[
---@class cc
---@field aaa number # a1
---@field bbb number # a2

---@param x cc
local function f(x) end

f({
    aaa = 1,
    <??>
})
]]
{
    {
        label = 'bbb',
        kind  = define.CompletionItemKind.Property,
    },
}

TEST [[
---@class cc
---@field aaa number # a1
---@field bbb number # a2

---@param x cc
local function f(x) end

f({aaa = 1,<??>})
]]
{
    {
        label = 'bbb',
        kind  = define.CompletionItemKind.Property,
    },
}

TEST [[
---@class cc
---@field aaa number # a1
---@field bbb number # a2

---@param x cc
local function f(x) end

f({aaa <??>})
]]
(nil)

TEST [[
---@class cc
---@field iffff number # a1

---@param x cc
local function f(x) end

f({if<??>})
]]
{
    include = true,
    {
        label = 'iffff',
        kind  = define.CompletionItemKind.Property,
    },
}

TEST [[
---@class cc
---@field aaa number # a1
---@field bbb number # a2

---@param x cc
local function f(x) end

f({
    {
        <??>
    }
})
]]
(nil)

TEST [[
---@return string
local function f() end

local s = f()

s.<??>
]]
(EXISTS)

Cared['description'] = true
TEST [[
---@class cc
---@field aaa number
---@field bbb number

---@type cc
local t
print(t.aa<??>)
]]
{
    {
        label = 'aaa',
        kind  = define.CompletionItemKind.Field,
        description = [[
```lua
(field) cc.aaa: number
```]]
    },
}
Cared['description'] = nil

TEST [[
---@type table<string, "a"|"b"|"c">
local x

x.a = <??>
]]
{
    {
        label  = '"a"',
        kind   = define.CompletionItemKind.EnumMember,
    },
    {
        label  = '"b"',
        kind   = define.CompletionItemKind.EnumMember,
    },
    {
        label  = '"c"',
        kind   = define.CompletionItemKind.EnumMember,
    },
}

TEST [[
---@type table<string, "a"|"b"|"c">
local x

x['a'] = <??>
]]
{
    {
        label  = '"a"',
        kind   = define.CompletionItemKind.EnumMember,
    },
    {
        label  = '"b"',
        kind   = define.CompletionItemKind.EnumMember,
    },
    {
        label  = '"c"',
        kind   = define.CompletionItemKind.EnumMember,
    },
}

TEST [[
---@type table<string, "a"|"b"|"c">
local x = {
    a = <??>
}
]]
{
    {
        label  = '"a"',
        kind   = define.CompletionItemKind.EnumMember,
    },
    {
        label  = '"b"',
        kind   = define.CompletionItemKind.EnumMember,
    },
    {
        label  = '"c"',
        kind   = define.CompletionItemKind.EnumMember,
    },
}

TEST [[
---@type table<string, "a"|"b"|"c">
local x = {
    ['a'] = <??>
}
]]
{
    {
        label  = '"a"',
        kind   = define.CompletionItemKind.EnumMember,
    },
    {
        label  = '"b"',
        kind   = define.CompletionItemKind.EnumMember,
    },
    {
        label  = '"c"',
        kind   = define.CompletionItemKind.EnumMember,
    },
}

Cared['insertText'] = true
TEST [[
---@class A.B.C
local m

function m.f()
end

m.f<??>
]]{
    {
        label  = "f()",
        kind   = define.CompletionItemKind.Function,
        insertText = EXISTS,
    },
    {
        label  = "f()",
        kind   = define.CompletionItemKind.Snippet,
        insertText = 'f()',
    },
}
Cared['insertText'] = nil

TEST [[
if true then<??>
]]
{
    {
        label = 'then',
        kind  = define.CompletionItemKind.Keyword,
    },
    {
        label = 'then .. end',
        kind  = define.CompletionItemKind.Snippet,
    }
}

TEST [[
if true then<??>
end
]]
{
    {
        label = 'then',
        kind  = define.CompletionItemKind.Keyword,
    },
}

TEST [[
if true then<??>
else
]]
{
    {
        label = 'then',
        kind  = define.CompletionItemKind.Keyword,
    },
}

TEST [[
if true then<??>
elseif
]]
{
    {
        label = 'then',
        kind  = define.CompletionItemKind.Keyword,
    },
}

TEST [[
do
    if true then<??>
end
]]
{
    {
        label = 'then',
        kind  = define.CompletionItemKind.Keyword,
    },
    {
        label = 'then .. end',
        kind  = define.CompletionItemKind.Snippet,
    }
}

TEST [[
---@class C
---@field x number
---@field y number

---@vararg C
local function f(x, ...)
end

f(1, {
    <??>
})
]]
{
    {
        label = 'x',
        kind  = define.CompletionItemKind.Property,
    },
    {
        label = 'y',
        kind  = define.CompletionItemKind.Property,
    }
}

TEST [[
---@class C
---@field x number
---@field y number

---@vararg C
local function f(x, ...)
end

f(1, {}, {}, {
    <??>
})
]]
{
    {
        label = 'x',
        kind  = define.CompletionItemKind.Property,
    },
    {
        label = 'y',
        kind  = define.CompletionItemKind.Property,
    }
}

TEST [[
---@class C
---@field x number
---@field y number

---@type C
local t = {
    <??>
}

]]
{
    {
        label = 'x',
        kind  = define.CompletionItemKind.Property,
    },
    {
        label = 'y',
        kind  = define.CompletionItemKind.Property,
    }
}

TEST [[
---@class C
---@field x number
---@field y number

---@type C
local t = {
    x<??>
}

]]
{
    include = true,
    {
        label = 'x',
        kind  = define.CompletionItemKind.Property,
    },
}

TEST [[
if <??> then
]]
(nil)

TEST [[
elseif <??> then
]]
(nil)

TEST [[
---@type iolib
local t = {
    <??>
]]
(EXISTS)

TEST [[
---@class A
---@field a '"hello"'|'"world"'

---@param t A
function api(t) end

api({<??>})
]]
(EXISTS)

TEST [[
---@class A
---@field a '"hello"'|'"world"'

---@param t A
function m:api(t) end

m:api({<??>})
]]
(EXISTS)

TEST [[
---@class AAA.BBB

---@type AAA.<??>
]]
{
    {
        label = 'AAA.BBB',
        kind  = define.CompletionItemKind.Class,
        textEdit    = {
            start   = 20009,
            finish  = 20013,
            newText = 'AAA.BBB',
        },
    }
}

Cared['insertText'] = true
TEST [[
---@overload fun(a: any, b: any)
local function zzzz(a) end
zzzz<??>
]]
{
    {
        label = 'zzzz(a)',
        kind  = define.CompletionItemKind.Function,
        insertText = 'zzzz',
    },
    {
        label = 'zzzz(a)',
        kind  = define.CompletionItemKind.Snippet,
        insertText = 'zzzz(${1:a})',
    },
    {
        label = 'zzzz(a, b)',
        kind  = define.CompletionItemKind.Function,
        insertText = 'zzzz',
    },
    {
        label = 'zzzz(a, b)',
        kind  = define.CompletionItemKind.Snippet,
        insertText = 'zzzz(${1:a}, ${2:b})',
    },
}

TEST [[
---@param a any
---@param b? any
---@param c? any
---@vararg any
local function foo(a, b, c, ...) end
foo<??>
]]
{
    {
        label = 'foo(a, b, c, ...)',
        kind  = define.CompletionItemKind.Function,
        insertText = 'foo',
    },
    {
        label = 'foo(a, b, c, ...)',
        kind  = define.CompletionItemKind.Snippet,
        insertText = 'foo(${1:a}, ${2:b?}, ${3:c?}, ${4:...})',
    },
}

TEST [[
---@param a? any
---@param b? any
---@param c? any
---@vararg any
local function foo(a, b, c, ...) end
foo<??>
]]
{
    {
        label = 'foo(a, b, c, ...)',
        kind  = define.CompletionItemKind.Function,
        insertText = 'foo',
    },
    {
        label = 'foo(a, b, c, ...)',
        kind  = define.CompletionItemKind.Snippet,
        insertText = 'foo(${1:a?}, ${2:b?}, ${3:c?}, ${4:...})',
    },
}

TEST [[
---@param f fun(a: any, b: any)
local function foo(f) end
foo<??>
]]
{
    {
        label = 'foo(f)',
        kind  = define.CompletionItemKind.Function,
        insertText = 'foo',
    },
    {
        label = 'foo(f)',
        kind  = define.CompletionItemKind.Snippet,
        insertText = 'foo(${1:f})',
    },
}
Cared['insertText'] = false

TEST [[
--- @diagnostic disable: unused-local
--- @class Test2
--- @field world integer
local Test2 = {}

--- @type Test2
local tdirect
--- @type Test2[]
local tarray

-- Direct inference
local b = tdirect    -- type . here, shows "world"

-- Inferred by index
local c = tarray[1].<??>  -- type . here, no auto completion
]]
(EXISTS)

TEST [[
local function f()
    if type() == '<??>' then
    end
end
]]
(EXISTS)

config.set(nil, 'Lua.completion.callSnippet',    'Disable')

TEST [[
GGG = 1
GGG = function ()
end

GGG<??>
]]
{
    {
        label = 'GGG',
        kind  = define.CompletionItemKind.Enum,
    },
    {
        label = 'GGG()',
        kind  = define.CompletionItemKind.Function,
    },
}

TEST [[
---@class C
---@field GGG number
local t = {}

t.GGG = function ()
end

t.GGG<??>
]]
{
    {
        label = 'GGG',
        kind  = define.CompletionItemKind.Field,
    },
    {
        label = 'GGG()',
        kind  = define.CompletionItemKind.Function,
    },
}

TEST [[
---@param f fun(a: any, b: any):boolean
local function f(f) end

f(fun<??>)
]]
{
    {
        label    = 'fun(a: any, b: any):boolean',
        kind     = define.CompletionItemKind.Function,
        textEdit = {
            newText = 'function (${1:a}, ${2:b})\n\t$0\nend',
            start   = 30002,
            finish  = 30005,
        }
    },
    {
        label = 'function',
        kind  = define.CompletionItemKind.Keyword,
    },
    {
        label = 'function ()',
        kind  = define.CompletionItemKind.Snippet,
    }
}

TEST [[
---@type {[1]: number}
local t

t.<??>
]]
{
    {
        label    = '1',
        kind     = define.CompletionItemKind.Field,
        textEdit = {
            newText = '[1]',
            start   = 30002,
            finish  = 30002,
        },
        additionalTextEdits = {
            {
                start   = 30001,
                finish  = 30002,
                newText = '',
            },
        },
    }
}

TEST [[
---@type {[1]: number}
local t

t.<??>
]]
{
    {
        label    = '1',
        kind     = define.CompletionItemKind.Field,
        textEdit = {
            newText = '[1]',
            start   = 30002,
            finish  = 30002,
        },
        additionalTextEdits = {
            {
                start   = 30001,
                finish  = 30002,
                newText = '',
            },
        },
    }
}

TEST [[
---@alias enum '"aaa"'|'"bbb"'

---@param x enum
---@return enum
local function f(x)
end

local r = f('<??>')
]]
{
    {
        label = "'aaa'",
        kind  = define.CompletionItemKind.EnumMember,
        textEdit = {
            newText = "'aaa'",
            start   = 70012,
            finish  = 70014,
        },
    },
    {
        label = "'bbb'",
        kind  = define.CompletionItemKind.EnumMember,
        textEdit = {
            newText = "'bbb'",
            start   = 70012,
            finish  = 70014,
        },
    },
}

TEST [[
---@type fun(x: "'aaa'"|"'bbb'")
local f

f('<??>')
]]
{
    {
        label = "'aaa'",
        kind  = define.CompletionItemKind.EnumMember,
        textEdit = {
            newText = "'aaa'",
            start   = 30002,
            finish  = 30004,
        },
    },
    {
        label = "'bbb'",
        kind  = define.CompletionItemKind.EnumMember,
        textEdit = {
            newText = "'bbb'",
            start   = 30002,
            finish  = 30004,
        },
    },
}

TEST [[
---@class Class
---@field on fun()
local c

c:<??>
]]
{
    {
        label = 'on',
        kind  = define.CompletionItemKind.Field,
    }
}

TEST [[
---@class Class
---@field on fun(self, x: "'aaa'"|"'bbb'")
local c

c:on(<??>)
]]
(EXISTS)

TEST [[
---@class Class
---@field on fun(x: "'aaa'"|"'bbb'")
local c

c.on('<??>')
]]
(EXISTS)

TEST [[
local m = {}

function m.f()
end

m.f()
m.<??>
]]
{
    [1] = EXISTS,
}

TEST [[
---@class class1
class1 = {}

function class1:method1() end

---@class class2 : class1
class2 = {}

class2:<??>

]]
{
    [1] = EXISTS,
}

TEST [[
--- @class Emit
--- @field on fun(self: Emit, eventName: string, cb: function)
--- @field on fun(self: Emit, eventName: '"died"', cb: fun(i: integer))
--- @field on fun(self: Emit, eventName: '"won"', cb: fun(s: string))
local emit = {}

emit:on('<??>')
]]
(EXISTS)

TEST [[
--- @class Emit
--- @field on fun(eventName: string, cb: function)
--- @field on fun(eventName: '"died"', cb: fun(i: integer))
--- @field on fun(eventName: '"won"', cb: fun(s: string))
local emit = {}

emit.on('died', <??>)
]]
{
    [1] = {
        label    = 'fun(i: integer)',
        kind     = define.CompletionItemKind.Function,
    }
}

TEST [[
--- @class Emit
--- @field on fun(self: Emit, eventName: string, cb: function)
--- @field on fun(self: Emit, eventName: '"died"', cb: fun(i: integer))
--- @field on fun(self: Emit, eventName: '"won"', cb: fun(s: string))
local emit = {}

emit:on('won', <??>)
]]
{
    [1] = {
        label    = 'fun(s: string)',
        kind     = define.CompletionItemKind.Function,
    }
}

TEST [[
--- @class Emit
--- @field on fun(self: Emit, eventName: string, cb: function)
--- @field on fun(self: Emit, eventName: '"died"', cb: fun(i: integer))
--- @field on fun(self: Emit, eventName: '"won"', cb: fun(s: string))
local emit = {}

emit.on(emit, 'won', <??>)
]]
{
    [1] = {
        label    = 'fun(s: string)',
        kind     = define.CompletionItemKind.Function,
    }
}

TEST [[
local function f()
    local inferCache
    in<??>
end
]]
{
    [1] = {
        label = 'in',
        kind  = define.CompletionItemKind.Keyword,
    },
    [2] = {
        label = 'in ..',
        kind  = define.CompletionItemKind.Snippet,
    },
    [3] = {
        label = 'inferCache',
        kind  = define.CompletionItemKind.Variable,
    }
}

TEST [[
utf<??>'xxx'
]]
{
    [1] = {
        label = 'utf8',
        kind  = define.CompletionItemKind.Field,
    }
}

TEST [[
---@class AAA

---@class AAA

---@type AAA<??>
]]
{
    [1] = {
        label = 'AAA',
        kind  = define.CompletionItemKind.Class,
    }
}

TEST [[
---@class AAA

---@class AAA

---@class BBB: AAA<??>
]]
{
    [1] = {
        label = 'AAA',
        kind  = define.CompletionItemKind.Class,
    }
}

TEST [[
---@class A
---@field zzzz number

---@param x A
local function f(x) end

f({zzz<??>})
]]
{
    [1] = {
        label = 'zzzz',
        kind  = define.CompletionItemKind.Property,
    }
}

TEST [[
---@class A
---@field zzzz number

---@param y A
local function f(x, y) end

f(1, {<??>})
]]
{
    [1] = {
        label = 'zzzz',
        kind  = define.CompletionItemKind.Property,
    }
}

TEST [[
xx@pcall<??>
]]
{
    [1] = {
        label = 'pcall',
        kind  = define.CompletionItemKind.Snippet,
        textEdit = {
            start   = 3,
            finish  = 8,
            newText = 'pcall(xx$1)$0',
        },
        additionalTextEdits = {
            {
                start   = 0,
                finish  = 3,
                newText = ''
            }
        }
    },
}

TEST [[
xx()@pcall<??>
]]
{
    [1] = {
        label = 'pcall',
        kind  = define.CompletionItemKind.Snippet,
        textEdit = {
            start   = 5,
            finish  = 10,
            newText = 'pcall(xx)',
        },
        additionalTextEdits = {
            {
                start   = 0,
                finish  = 5,
                newText = ''
            }
        }
    },
}

TEST [[
xx(1, 2, 3)@pcall<??>
]]
{
    [1] = {
        label = 'pcall',
        kind  = define.CompletionItemKind.Snippet,
        textEdit = {
            start   = 12,
            finish  = 17,
            newText = 'pcall(xx, 1, 2, 3)',
        },
        additionalTextEdits = {
            {
                start   = 0,
                finish  = 12,
                newText = ''
            }
        }
    },
}

TEST [[
xx@xpcall<??>
]]
{
    [1] = {
        label = 'xpcall',
        kind  = define.CompletionItemKind.Snippet,
        textEdit = {
            start   = 3,
            finish  = 9,
            newText = 'xpcall(xx, ${1:debug.traceback}$2)$0',
        },
        additionalTextEdits = {
            {
                start   = 0,
                finish  = 3,
                newText = ''
            }
        }
    },
}

TEST [[
xx()@xpcall<??>
]]
{
    [1] = {
        label = 'xpcall',
        kind  = define.CompletionItemKind.Snippet,
        textEdit = {
            start   = 5,
            finish  = 11,
            newText = 'xpcall(xx, ${1:debug.traceback})$0',
        },
        additionalTextEdits = {
            {
                start   = 0,
                finish  = 5,
                newText = ''
            }
        }
    },
}

TEST [[
xx(1, 2, 3)@xpcall<??>
]]
{
    [1] = {
        label = 'xpcall',
        kind  = define.CompletionItemKind.Snippet,
        textEdit = {
            start   = 12,
            finish  = 18,
            newText = 'xpcall(xx, ${1:debug.traceback}, 1, 2, 3)$0',
        },
        additionalTextEdits = {
            {
                start   = 0,
                finish  = 12,
                newText = ''
            }
        }
    },
}

TEST [[
xx@function<??>
]]
{
    [1] = {
        label = 'function',
        kind  = define.CompletionItemKind.Snippet,
        textEdit = {
            start   = 3,
            finish  = 11,
            newText = 'function xx($1)\n\t$0\nend',
        },
        additionalTextEdits = {
            {
                start   = 0,
                finish  = 3,
                newText = ''
            }
        }
    },
}

TEST [[
xx.yy@method<??>
]]
{
    [1] = {
        label = 'method',
        kind  = define.CompletionItemKind.Snippet,
        textEdit = {
            start   = 6,
            finish  = 12,
            newText = 'function xx:yy($1)\n\t$0\nend',
        },
        additionalTextEdits = {
            {
                start   = 0,
                finish  = 6,
                newText = ''
            }
        }
    },
}

TEST [[
xx:yy@method<??>
]]
{
    [1] = {
        label = 'method',
        kind  = define.CompletionItemKind.Snippet,
        textEdit = {
            start   = 6,
            finish  = 12,
            newText = 'function xx:yy($1)\n\t$0\nend',
        },
        additionalTextEdits = {
            {
                start   = 0,
                finish  = 6,
                newText = ''
            }
        }
    },
}

TEST [[
xx@insert<??>
]]
{
    [1] = {
        label = 'insert',
        kind  = define.CompletionItemKind.Snippet,
        textEdit = {
            start   = 3,
            finish  = 9,
            newText = 'table.insert(xx, $0)',
        },
        additionalTextEdits = {
            {
                start   = 0,
                finish  = 3,
                newText = ''
            }
        }
    },
}

TEST [[
xx++<??>
]]
{
    [1] = {
        label = '++',
        kind  = define.CompletionItemKind.Snippet,
        textEdit = {
            start   = 2,
            finish  = 4,
            newText = 'xx = xx + 1',
        },
        additionalTextEdits = {
            {
                start   = 0,
                finish  = 2,
                newText = ''
            }
        }
    },
    [2] = {
        label = '++?',
        kind  = define.CompletionItemKind.Snippet,
        textEdit = {
            start   = 2,
            finish  = 4,
            newText = 'xx = (xx or 0) + 1',
        },
        additionalTextEdits = {
            {
                start   = 0,
                finish  = 2,
                newText = ''
            }
        }
    },
}

TEST [[
fff(function ()
    xx@xpcall<??>
end)
]]
{
    [1] = {
        label = 'xpcall',
        kind  = define.CompletionItemKind.Snippet,
        textEdit = {
            start   = 10007,
            finish  = 10013,
            newText = 'xpcall(xx, ${1:debug.traceback}$2)$0',
        },
        additionalTextEdits = {
            {
                start   = 10004,
                finish  = 10007,
                newText = '',
            }
        }
    },
}

TEST [[
---@meta

---@alias testAlias
---| "'test1'"
---| "'test2'"
---| "'test3'"

---@class TestClass
local TestClass = {}

---@overload fun(self: TestClass, arg2: testAlias)
---@param arg1 integer
---@param arg2 testAlias
function TestClass:testFunc2(arg1, arg2) end

---@type TestClass
local t

t:testFunc2(<??>)
]]
(EXISTS)

TEST [[
require '<??>'
]]
(function (results)
    assert(#results == 9, require 'utility'.dump(results))
end)

TEST [[
AAA = 1

<??>
]]
(EXISTS)

TEST [[
if<??>
]]
(EXISTS)

TEST [[
local t = x[<??>]
]]
(function (results)
    for _, res in ipairs(results) do
        assert(res.label ~= 'do')
    end
end)

TEST [[
---@class ZZZZZ.XXXX
---@class ZZZZZ.XXXX
---@class ZZZZZ.XXXX
---@class ZZZZZ.XXXX
---@class ZZZZZ.XXXX

---@type <??>
]]
(function (results)
    local count = 0
    for _, res in ipairs(results) do
        if res.label == 'ZZZZZ.XXXX' then
            count = count + 1
        end
    end
    assert(count == 1)
end)

TEST [[
local x
x.y.z = xxx

x.y.<??>
]]
{
    {
        label = 'z',
        kind  = define.CompletionItemKind.Field,
    }
}

TEST [[
local xyz

---@cast <??>
]]
{
    {
        label = 'xyz',
        kind  = define.CompletionItemKind.Variable,
    },
}

TEST [[
local xyz

---@cast x<??>
]]
{
    {
        label = 'xyz',
        kind  = define.CompletionItemKind.Variable,
    }
}

TEST [[
---@type `CONST.X` | `CONST.Y`
local x

if x == <??>
]]
{
    {
        label = 'CONST.X',
        kind  = define.CompletionItemKind.EnumMember,
    },
    {
        label = 'CONST.Y',
        kind  = define.CompletionItemKind.EnumMember,
    },
}

TEST [[
---@param x `CONST.X` | `CONST.Y`
local function f(x) end

f(<??>)
]]
{
    {
        label = 'CONST.X',
        kind  = define.CompletionItemKind.EnumMember,
    },
    {
        label = 'CONST.Y',
        kind  = define.CompletionItemKind.EnumMember,
    },
}

TEST [[
return function ()
    local function fff(xxx)
        for f in xx<??>
    end
end
]]
{
    {
        label = 'xxx',
        kind  = define.CompletionItemKind.Variable,
    },
}

TEST [[
---@class A
---@field xxx 'aaa'|'bbb'

---@type A
local t = {
    xxx = '<??>
}
]]
{
    {
        label    = "'aaa'",
        kind     = define.CompletionItemKind.EnumMember,
        textEdit = EXISTS,
    },
    {
        label    = "'bbb'",
        kind     = define.CompletionItemKind.EnumMember,
        textEdit = EXISTS,
    },
}

TEST [[
---@enum A
T = {
    x = 1,
    y = 'ss',
}

---@param x A
local function f(x) end

f(<??>)
]]
{
    {
        label    = 'T.x',
        kind     = define.CompletionItemKind.EnumMember,
    },
    {
        label    = 'T.y',
        kind     = define.CompletionItemKind.EnumMember,
    },
    {
        label    = '1',
        kind     = define.CompletionItemKind.EnumMember,
    },
    {
        label    = '"ss"',
        kind     = define.CompletionItemKind.EnumMember,
    },
}

TEST [[
---@enum A
local ppp = {
    x = 1,
    y = 'ss',
}

---@param x A
local function f(x) end

f(<??>)
]]
{
    {
        label    = 'ppp.x',
        kind     = define.CompletionItemKind.EnumMember,
    },
    {
        label    = 'ppp.y',
        kind     = define.CompletionItemKind.EnumMember,
    },
    {
        label    = '1',
        kind     = define.CompletionItemKind.EnumMember,
    },
    {
        label    = '"ss"',
        kind     = define.CompletionItemKind.EnumMember,
    },
}

TEST [[
---@enum A
ppp.fff = {
    x = 1,
    y = 'ss',
}

---@param x A
local function f(x) end

f(<??>)
]]
{
    {
        label    = 'ppp.fff.x',
        kind     = define.CompletionItemKind.EnumMember,
    },
    {
        label    = 'ppp.fff.y',
        kind     = define.CompletionItemKind.EnumMember,
    },
    {
        label    = '1',
        kind     = define.CompletionItemKind.EnumMember,
    },
    {
        label    = '"ss"',
        kind     = define.CompletionItemKind.EnumMember,
    },
}

TEST [[
local x = 1
local y = 2

---@enum Enum
local t = {
    x = x,
    y = y,
}

---@param p Enum
local function f(p) end

f(<??>)
]]
{
    {
        label    = 't.x',
        kind     = define.CompletionItemKind.EnumMember,
    },
    {
        label    = 't.y',
        kind     = define.CompletionItemKind.EnumMember,
    },
    {
        label    = '1',
        kind     = define.CompletionItemKind.EnumMember,
    },
    {
        label    = '2',
        kind     = define.CompletionItemKind.EnumMember,
    },
}

TEST [[
local x = 1
local y = 2

---@enum(key) Enum
local t = {
    x = x,
    y = y,
}

---@param p Enum
local function f(p) end

f(<??>)
]]
{
    {
        label    = '"x"',
        kind     = define.CompletionItemKind.EnumMember,
    },
    {
        label    = '"y"',
        kind     = define.CompletionItemKind.EnumMember,
    },
}

TEST [[
---@class optional
---@field enum enum

---@enum(key) enum
local t = {
    a = 1,
    b = 2,
}

---@param a optional
local function f(a)
end

f {
    enum = <??>
}
]]
{
    {
        label    = '"a"',
        kind     = define.CompletionItemKind.EnumMember,
    },
    {
        label    = '"b"',
        kind     = define.CompletionItemKind.EnumMember,
    },
}

TEST [[
--
<??>
]]
(function (results)
    assert(#results > 2)
end)

TEST [[
--xxx
<??>
]]
(function (results)
    assert(#results > 2)
end)

TEST [[
---<??>
local x = function (x, y) end
]]
(EXISTS)

TEST [[
--- <??>
local x = function (x, y) end
]]
(EXISTS)

TEST [[
local x = {
<??>
})
]]
(function (results)
    for _, res in ipairs(results) do
        assert(res.label ~= 'do')
    end
end)

TEST [[
---@class Options
---@field page number
---@field active boolean

---@param opts Options
local function acceptOptions(opts) end

acceptOptions({
<??>
})
]]
(function (results)
    assert(#results == 2)
end)

TEST [[
local t1 = {}

t1.A = {}
t1.A.B = {}
t1.A.B.C = 1

local t2 = t1

print(t2.A.<??>)
]]
{
    {
        label    = 'B',
        kind     = define.CompletionItemKind.Field,
    },
}

TEST [[
---@overload fun(x: number)
---@overload fun(x: number, y: number)
local function fff(...)
end

fff<??>
]]
{
    {
        label    = 'fff(x)',
        kind     = define.CompletionItemKind.Function,
    },
    {
        label    = 'fff(x, y)',
        kind     = define.CompletionItemKind.Function,
    },
}

TEST [[
---@overload fun(x: number)
---@overload fun(x: number, y: number)
function fff(...)
end

fff<??>
]]
{
    {
        label    = 'fff(x)',
        kind     = define.CompletionItemKind.Function,
    },
    {
        label    = 'fff(x, y)',
        kind     = define.CompletionItemKind.Function,
    },
}

TEST [[
---@overload fun(x: number)
---@overload fun(x: number, y: number)
function t.fff(...)
end

t.fff<??>
]]
{
    {
        label    = 'fff(x)',
        kind     = define.CompletionItemKind.Function,
    },
    {
        label    = 'fff(x, y)',
        kind     = define.CompletionItemKind.Function,
    },
}

TEST [[
---@class A
---@field private x number
---@field y number

---@type A
local t

t.<??>
]]
{
    {
        label    = 'y',
        kind     = define.CompletionItemKind.Field,
    },
}

TEST [[
---@class A
---@field private x number
---@field protected y number
---@field z number

---@class B: A
local t

t.<??>
]]
{
    {
        label    = 'y',
        kind     = define.CompletionItemKind.Field,
    },
    {
        label    = 'z',
        kind     = define.CompletionItemKind.Field,
    },
}

TEST [[
---@class A
---@field private x number
---@field protected y number
---@field z number

---@class B: A

---@type B
local t

t.<??>
]]
{
    {
        label    = 'z',
        kind     = define.CompletionItemKind.Field,
    },
}

TEST [[
---@class ABCD

---@see ABCD<??>
]]
{
    {
        label    = 'ABCD',
        kind     = define.CompletionItemKind.Class,
        textEdit = {
            newText = 'ABCD',
            start   = 20008,
            finish  = 20012,
        }
    },
}

TEST [[
---@class A
---@field f fun(x: string): string

---@type A
local t = {
    f = <??>
}
]]
{
    {
        label = 'fun(x: string):string',
        kind  = define.CompletionItemKind.Function,
    }
}

TEST [[
---@type table<string, integer>
local x = {
    a = 1,
    b = 2,
    c = 3
}

x.<??>
]]
{
    {
        label = 'a',
        kind  = define.CompletionItemKind.Enum,
    },
    {
        label = 'b',
        kind  = define.CompletionItemKind.Enum,
    },
    {
        label = 'c',
        kind  = define.CompletionItemKind.Enum,
    },
}

TEST [[
---@param x {damage: integer, count: integer, health:integer}
local function f(x) end

f {<??>}
]]
{
    {
        label = 'count',
        kind  = define.CompletionItemKind.Property,
    },
    {
        label = 'damage',
        kind  = define.CompletionItemKind.Property,
    },
    {
        label = 'health',
        kind  = define.CompletionItemKind.Property,
    },
}

TEST [[
---@alias Foo Foo[]
---@type Foo
local foo
foo = {"<??>"}
]]
(EXISTS)

TEST [[
---@class c
---@field abc fun()
---@field abc2 fun()

---@param p c
local function f(p) end

f({
    abc = function(s)
        local abc3
        abc<??>
    end,
})
]]
{
    {
        label = 'abc3',
        kind  = define.CompletionItemKind.Variable,
    },
    {
        label = 'abc',
        kind  = define.CompletionItemKind.Text,
    },
    {
        label = 'abc2',
        kind  = define.CompletionItemKind.Text,
    },
}

TEST [[
while true do
    continue<??>
end
]]
{
    {
        label      = 'continue',
        kind       = define.CompletionItemKind.Keyword,
    },
    {
        label      = 'goto continue ..',
        kind       = define.CompletionItemKind.Snippet,
        additionalTextEdits = {
            {
                start   = 10004,
                finish  = 10004,
                newText = 'goto ',
            },
            {
                start   = 20000,
                finish  = 20000,
                newText = '    ::continue::\n',
            },
        }
    },
}

TEST [[
while true do
    goto continue<??>
end
]]
{
    {
        label      = 'continue',
        kind       = define.CompletionItemKind.Keyword,
    },
    {
        label      = 'goto continue ..',
        kind       = define.CompletionItemKind.Snippet,
        additionalTextEdits = {
            {
                start   = 20000,
                finish  = 20000,
                newText = '    ::continue::\n',
            }
        }
    },
}

TEST [[
while true do
    goto continue<??>
    ::continue::
end
]]
{
    {
        label      = 'continue',
        kind       = define.CompletionItemKind.Keyword,
    },
    {
        label      = 'goto continue ..',
        kind       = define.CompletionItemKind.Snippet,
        additionalTextEdits = {
        }
    },
}

Cared['description'] = true
TEST [[
---@class Foo
---@field ['with quotes'] integer
---@field without_quotes integer

---@type Foo
local bar = {}

bar.<??>
]]
{
    {
        label = "'with quotes'",
        kind  = define.CompletionItemKind.Field,
        textEdit = {
            start   = 70004,
            finish  = 70004,
            newText = "['with quotes']"
        },
        additionalTextEdits = {
            {
                start   = 70003,
                finish  = 70004,
                newText = '',
            }
        },
        description = [[
```lua
(field) Foo['with quotes']: integer
```]]
    },
    {
        label = 'without_quotes',
        kind  = define.CompletionItemKind.Field,
        description = [[
```lua
(field) Foo.without_quotes: integer
```]]
    },
}
Cared['description'] = false

TEST [[
---@class A
local M = {}

function M:method1()
end

function M.static1(tt)
end

function M:method2()
end

function M.static2(tt)
end

---@type A
local a

a.<??>
]]
{
    {
        label ='static1(tt)',
        kind  = define.CompletionItemKind.Function,
    },
    {
        label ='static2(tt)',
        kind  = define.CompletionItemKind.Function,
    },
    {
        label ='method1(self)',
        kind  = define.CompletionItemKind.Method,
    },
    {
        label ='method2(self)',
        kind  = define.CompletionItemKind.Method,
    },
}

TEST [[
---@class A
local M = {}

function M:method1()
end

function M.static1(tt)
end

function M:method2()
end

function M.static2(tt)
end

---@type A
local a

a:<??>
]]
{
    {
        label ='method1()',
        kind  = define.CompletionItemKind.Method,
    },
    {
        label ='method2()',
        kind  = define.CompletionItemKind.Method,
    },
    {
        label ='static1()',
        kind  = define.CompletionItemKind.Function,
    },
    {
        label ='static2()',
        kind  = define.CompletionItemKind.Function,
    },
}

TEST [[
---@class A
---@field x number
---@field y? number
---@field z number

---@type A
local t = {
    <??>
}
]]
{
    {
        label = 'x',
        kind  = define.CompletionItemKind.Property,
    },
    {
        label = 'z',
        kind  = define.CompletionItemKind.Property,
    },
    {
        label = 'y?',
        kind  = define.CompletionItemKind.Property,
    },
}

TEST [[
---@class A
---@field x number
---@field y? number
---@field z number

---@param t A
local function f(t) end

f {
    <??>
}
]]
{
    {
        label = 'x',
        kind  = define.CompletionItemKind.Property,
    },
    {
        label = 'z',
        kind  = define.CompletionItemKind.Property,
    },
    {
        label = 'y?',
        kind  = define.CompletionItemKind.Property,
    },
}

TEST [[
---@class A
---@overload fun(x: {id: string})

---@generic T
---@param t `T`
---@return T
local function new(t) end

new 'A' {
    <??>
}
]]
{
    {
        label = 'id',
        kind  = define.CompletionItemKind.Property,
    }
}

TEST [[
---@class namespace.A
---@overload fun(x: {id: string})

---@generic T
---@param t namespace.`T`
---@return T
local function new(t) end

new 'A' {
    <??>
}
]]
{
    {
        label = 'id',
        kind  = define.CompletionItemKind.Property,
    }
}

TEST [[
---@enum(key) enum
local t = {
    a = 1,
    b = 2,
    c = 3,
}

---@class A
local M

---@param optional enum
function M:optional(optional)
end

---@return A
function M:self()
    return self
end

---@type A
local m

m:self(<??>):optional()
]]
(nil)

TEST [[
---@enum(key) enum
local t = {
    a = 1,
    b = 2,
    c = 3,
}

---@class A
local M

---@return A
function M.create()
    return M
end

---@param optional enum
---@return self
function M:optional(optional)
    return self
end

---@return A
function M:self()
    return self
end


M.create():optional(<??>):self()
]]
{
    {
        label = '"a"',
        kind  = define.CompletionItemKind.EnumMember,
    },
    {
        label = '"b"',
        kind  = define.CompletionItemKind.EnumMember,
    },
    {
        label = '"c"',
        kind  = define.CompletionItemKind.EnumMember,
    },
}