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local core   = require 'core.completion'
local files  = require 'files'

EXISTS = {'EXISTS'}

local function eq(a, b)
    if a == EXISTS and b ~= nil then
        return true
    end
    local tp1, tp2 = type(a), type(b)
    if tp1 ~= tp2 then
        return false
    end
    if tp1 == 'table' then
        local mark = {}
        for k in pairs(a) do
            if not eq(a[k], b[k]) then
                return false
            end
            mark[k] = true
        end
        for k in pairs(b) do
            if not mark[k] then
                return false
            end
        end
        return true
    end
    return a == b
end

local function include(a, b)
    if a == EXISTS and b ~= nil then
        return true
    end
    local tp1, tp2 = type(a), type(b)
    if tp1 ~= tp2 then
        return false
    end
    if tp1 == 'table' then
        for k in pairs(a) do
            if not eq(a[k], b[k]) then
                return false
            end
        end
        return true
    end
    return a == b
end

rawset(_G, 'TEST', true)

Cared = {
    ['label']               = true,
    ['kind']                = true,
    ['textEdit']            = true,
    ['additionalTextEdits'] = true,
    ['deprecated']          = true,
}

IgnoreFunction = false
ContinueTyping = false

function TEST(script)
    return function (expect)
        files.removeAll()
        local pos = script:find('$', 1, true) - 1
        local new_script = script:gsub('%$', '')

        files.setText('', new_script)
        core.clearCache()
        if ContinueTyping then
            local triggerCharacter = script:sub(pos - 1, pos - 1)
            core.completion('', pos - 1, triggerCharacter)
        end
        local triggerCharacter = script:sub(pos, pos)
        local result = core.completion('', pos, triggerCharacter)
        if not expect then
            assert(result == nil)
            return
        end
        assert(result ~= nil)
        result.enableCommon = nil
        for _, item in ipairs(result) do
            local r = core.resolve(item.id)
            for k, v in pairs(r or {}) do
                item[k] = v
            end
            for k in pairs(item) do
                if not Cared[k] then
                    item[k] = nil
                end
            end
            if item.description then
                item.description = tostring(item.description)
            end
        end
        if IgnoreFunction then
            for i = #result, 1, -1 do
                local item = result[i]
                if item.label:find '%('
                and not item.label:find 'function' then
                    result[i] = result[#result]
                    result[#result] = nil
                end
            end
        end
        assert(result)
        if expect.include then
            expect.include = nil
            assert(include(expect, result))
        else
            assert(eq(expect, result))
        end
    end
end

require 'completion.common'
require 'completion.continue'