local helpers = require('test.functional.helpers')(after_each)
local clear = helpers.clear
local funcs = helpers.funcs
local eval, eq = helpers.eval, helpers.eq
local execute = helpers.execute
local nvim = helpers.nvim
local exc_exec = helpers.exc_exec

describe('msgpack*() functions', function()
  before_each(clear)

  local obj_test = function(msg, obj)
    it(msg, function()
      nvim('set_var', 'obj', obj)
      eq(obj, eval('msgpackparse(msgpackdump(g:obj))'))
    end)
  end

  -- Regression test: msgpack_list_write was failing to write buffer with zero
  -- length.
  obj_test('are able to dump and restore {"file": ""}', {{file=''}})
  -- Regression test: msgpack_list_write was failing to write buffer with NL at
  -- the end.
  obj_test('are able to dump and restore {0, "echo mpack"}', {{0, 'echo mpack'}})
  obj_test('are able to dump and restore "Test\\n"', {'Test\n'})
  -- Regression test: msgpack_list_write was failing to write buffer with NL
  -- inside.
  obj_test('are able to dump and restore "Test\\nTest 2"', {'Test\nTest 2'})
  -- Test that big objects (requirement: dump to something that is bigger then
  -- IOSIZE) are also fine. This particular object is obtained by concatenating
  -- 5 identical shada files.
  local big_obj = {
    1, 1436711454, 78, {
      encoding="utf-8",
      max_kbyte=10,
      pid=19269,
      version="NVIM 0.0.0-alpha+201507121634"
    },
    8, 1436711451, 40, { file="/home/zyx/.nvim/shada/main.shada" },
    8, 1436711391, 8, { file="" },
    4, 1436700940, 30, { 0, "call mkdir('/tmp/tty/tty')" },
    4, 1436701355, 35, { 0, "call mkdir('/tmp/tty/tty', 'p')" },
    4, 1436701368, 24, { 0, "call mkdir('/', 'p')" },
    4, 1436701375, 26, { 0, "call mkdir('/tty/tty')" },
    4, 1436701383, 30, { 0, "call mkdir('/tty/tty/tty')" },
    4, 1436701407, 35, { 0, "call mkdir('/usr/tty/tty', 'p')" },
    4, 1436701666, 35, { 0, "call mkdir('/tty/tty/tty', 'p')" },
    4, 1436708101, 25, { 0, "echo msgpackdump([1])" },
    4, 1436708966, 6, { 0, "cq" },
    4, 1436709606, 25, { 0, "echo msgpackdump([5])" },
    4, 1436709610, 26, { 0, "echo msgpackdump([10])" },
    4, 1436709615, 31, { 0, "echo msgpackdump([5, 5, 5])" },
    4, 1436709618, 35, { 0, "echo msgpackdump([5, 5, 5, 10])" },
    4, 1436709634, 57, {
      0,
      "echo msgpackdump([5, 5, 5, 10, [10, 20, {\"abc\": 1}]])"
    },
    4, 1436709651, 67, {
      0,
      "echo msgpackdump([5, 5, 5, 10, [10, 20, {\"abc\": 1, \"def\": 0}]])"
    },
    4, 1436709660, 70, {
      0,
      "echo msgpackdump([5, 5, 5, 10, [10, 20, {\"abc\": 1, \"def\": 0}], 0])"
    },
    4, 1436710095, 29, { 0, "echo msgpackparse([\"\\n\"])" },
    4, 1436710100, 28, { 0, "echo msgpackparse([\"j\"])" },
    4, 1436710109, 31, { 0, "echo msgpackparse([\"\", \"\"])" },
    4, 1436710424, 33, { 0, "echo msgpackparse([\"\", \"\\n\"])" },
    4, 1436710428, 32, { 0, "echo msgpackparse([\"\", \"j\"])" },
    4, 1436711142, 14, { 0, "echo mpack" },
    4, 1436711196, 45, { 0, "let lengths = map(mpack[:], 'len(v:val)')" },
    4, 1436711206, 16, { 0, "echo lengths" },
    4, 1436711244, 92, {
      0,
      ("let sum = len(lengths) - 1 | call map(copy(lengths), "
       .. "'extend(g:, {\"sum\": sum + v:val})')")
    },
    4, 1436711245, 12, { 0, "echo sum" },
    4, 1436711398, 10, { 0, "echo s" },
    4, 1436711404, 41, { 0, "let mpack = readfile('/tmp/foo', 'b')" },
    4, 1436711408, 41, { 0, "let shada_objects=msgpackparse(mpack)" },
    4, 1436711415, 22, { 0, "echo shada_objects" },
    4, 1436711451, 30, { 0, "e ~/.nvim/shada/main.shada" },
    4, 1436711454, 6, { 0, "qa" },
    4, 1436711442, 9, { 1, "test", 47 },
    4, 1436711443, 15, { 1, "aontsuesan", 47 },
    2, 1436711443, 38, { hlsearch=1, pat="aontsuesan", smartcase=1 },
    2, 0, 31, { islast=0, pat="", smartcase=1, sub=1 },
    3, 0, 3, { "" },
    10, 1436711451, 40, { file="/home/zyx/.nvim/shada/main.shada" },
    1, 1436711454, 78, {
      encoding="utf-8",
      max_kbyte=10,
      pid=19269,
      version="NVIM 0.0.0-alpha+201507121634"
    },
    8, 1436711451, 40, { file="/home/zyx/.nvim/shada/main.shada" },
    8, 1436711391, 8, { file="" },
    4, 1436700940, 30, { 0, "call mkdir('/tmp/tty/tty')" },
    4, 1436701355, 35, { 0, "call mkdir('/tmp/tty/tty', 'p')" },
    4, 1436701368, 24, { 0, "call mkdir('/', 'p')" },
    4, 1436701375, 26, { 0, "call mkdir('/tty/tty')" },
    4, 1436701383, 30, { 0, "call mkdir('/tty/tty/tty')" },
    4, 1436701407, 35, { 0, "call mkdir('/usr/tty/tty', 'p')" },
    4, 1436701666, 35, { 0, "call mkdir('/tty/tty/tty', 'p')" },
    4, 1436708101, 25, { 0, "echo msgpackdump([1])" },
    4, 1436708966, 6, { 0, "cq" },
    4, 1436709606, 25, { 0, "echo msgpackdump([5])" },
    4, 1436709610, 26, { 0, "echo msgpackdump([10])" },
    4, 1436709615, 31, { 0, "echo msgpackdump([5, 5, 5])" },
    4, 1436709618, 35, { 0, "echo msgpackdump([5, 5, 5, 10])" },
    4, 1436709634, 57, {
      0,
      "echo msgpackdump([5, 5, 5, 10, [10, 20, {\"abc\": 1}]])"
    },
    4, 1436709651, 67, {
      0,
      "echo msgpackdump([5, 5, 5, 10, [10, 20, {\"abc\": 1, \"def\": 0}]])"
    },
    4, 1436709660, 70, {
      0,
      "echo msgpackdump([5, 5, 5, 10, [10, 20, {\"abc\": 1, \"def\": 0}], 0])"
    },
    4, 1436710095, 29, { 0, "echo msgpackparse([\"\\n\"])" },
    4, 1436710100, 28, { 0, "echo msgpackparse([\"j\"])" },
    4, 1436710109, 31, { 0, "echo msgpackparse([\"\", \"\"])" },
    4, 1436710424, 33, { 0, "echo msgpackparse([\"\", \"\\n\"])" },
    4, 1436710428, 32, { 0, "echo msgpackparse([\"\", \"j\"])" },
    4, 1436711142, 14, { 0, "echo mpack" },
    4, 1436711196, 45, { 0, "let lengths = map(mpack[:], 'len(v:val)')" },
    4, 1436711206, 16, { 0, "echo lengths" },
    4, 1436711244, 92, {
      0,
      ("let sum = len(lengths) - 1 | call map(copy(lengths), "
       .. "'extend(g:, {\"sum\": sum + v:val})')")
    },
    4, 1436711245, 12, { 0, "echo sum" },
    4, 1436711398, 10, { 0, "echo s" },
    4, 1436711404, 41, { 0, "let mpack = readfile('/tmp/foo', 'b')" },
    4, 1436711408, 41, { 0, "let shada_objects=msgpackparse(mpack)" },
    4, 1436711415, 22, { 0, "echo shada_objects" },
    4, 1436711451, 30, { 0, "e ~/.nvim/shada/main.shada" },
    4, 1436711454, 6, { 0, "qa" },
    4, 1436711442, 9, { 1, "test", 47 },
    4, 1436711443, 15, { 1, "aontsuesan", 47 },
    2, 1436711443, 38, { hlsearch=1, pat="aontsuesan", smartcase=1 },
    2, 0, 31, { islast=0, pat="", smartcase=1, sub=1 },
    3, 0, 3, { "" },
    10, 1436711451, 40, { file="/home/zyx/.nvim/shada/main.shada" },
    1, 1436711454, 78, {
      encoding="utf-8",
      max_kbyte=10,
      pid=19269,
      version="NVIM 0.0.0-alpha+201507121634"
    },
    8, 1436711451, 40, { file="/home/zyx/.nvim/shada/main.shada" },
    8, 1436711391, 8, { file="" },
    4, 1436700940, 30, { 0, "call mkdir('/tmp/tty/tty')" },
    4, 1436701355, 35, { 0, "call mkdir('/tmp/tty/tty', 'p')" },
    4, 1436701368, 24, { 0, "call mkdir('/', 'p')" },
    4, 1436701375, 26, { 0, "call mkdir('/tty/tty')" },
    4, 1436701383, 30, { 0, "call mkdir('/tty/tty/tty')" },
    4, 1436701407, 35, { 0, "call mkdir('/usr/tty/tty', 'p')" },
    4, 1436701666, 35, { 0, "call mkdir('/tty/tty/tty', 'p')" },
    4, 1436708101, 25, { 0, "echo msgpackdump([1])" },
    4, 1436708966, 6, { 0, "cq" },
    4, 1436709606, 25, { 0, "echo msgpackdump([5])" },
    4, 1436709610, 26, { 0, "echo msgpackdump([10])" },
    4, 1436709615, 31, { 0, "echo msgpackdump([5, 5, 5])" },
    4, 1436709618, 35, { 0, "echo msgpackdump([5, 5, 5, 10])" },
    4, 1436709634, 57, {
      0,
      "echo msgpackdump([5, 5, 5, 10, [10, 20, {\"abc\": 1}]])"
    },
    4, 1436709651, 67, {
      0,
      "echo msgpackdump([5, 5, 5, 10, [10, 20, {\"abc\": 1, \"def\": 0}]])"
    },
    4, 1436709660, 70, {
      0,
      "echo msgpackdump([5, 5, 5, 10, [10, 20, {\"abc\": 1, \"def\": 0}], 0])"
    },
    4, 1436710095, 29, { 0, "echo msgpackparse([\"\\n\"])" },
    4, 1436710100, 28, { 0, "echo msgpackparse([\"j\"])" },
    4, 1436710109, 31, { 0, "echo msgpackparse([\"\", \"\"])" },
    4, 1436710424, 33, { 0, "echo msgpackparse([\"\", \"\\n\"])" },
    4, 1436710428, 32, { 0, "echo msgpackparse([\"\", \"j\"])" },
    4, 1436711142, 14, { 0, "echo mpack" },
    4, 1436711196, 45, { 0, "let lengths = map(mpack[:], 'len(v:val)')" },
    4, 1436711206, 16, { 0, "echo lengths" },
    4, 1436711244, 92, {
      0,
      ("let sum = len(lengths) - 1 | call map(copy(lengths), "
       .. "'extend(g:, {\"sum\": sum + v:val})')")
    },
    4, 1436711245, 12, { 0, "echo sum" },
    4, 1436711398, 10, { 0, "echo s" },
    4, 1436711404, 41, { 0, "let mpack = readfile('/tmp/foo', 'b')" },
    4, 1436711408, 41, { 0, "let shada_objects=msgpackparse(mpack)" },
    4, 1436711415, 22, { 0, "echo shada_objects" },
    4, 1436711451, 30, { 0, "e ~/.nvim/shada/main.shada" },
    4, 1436711454, 6, { 0, "qa" },
    4, 1436711442, 9, { 1, "test", 47 },
    4, 1436711443, 15, { 1, "aontsuesan", 47 },
    2, 1436711443, 38, { hlsearch=1, pat="aontsuesan", smartcase=1 },
    2, 0, 31, { islast=0, pat="", smartcase=1, sub=1 },
    3, 0, 3, { "" },
    10, 1436711451, 40, { file="/home/zyx/.nvim/shada/main.shada" },
    1, 1436711454, 78, {
      encoding="utf-8",
      max_kbyte=10,
      pid=19269,
      version="NVIM 0.0.0-alpha+201507121634"
    },
    8, 1436711451, 40, { file="/home/zyx/.nvim/shada/main.shada" },
    8, 1436711391, 8, { file="" },
    4, 1436700940, 30, { 0, "call mkdir('/tmp/tty/tty')" },
    4, 1436701355, 35, { 0, "call mkdir('/tmp/tty/tty', 'p')" },
    4, 1436701368, 24, { 0, "call mkdir('/', 'p')" },
    4, 1436701375, 26, { 0, "call mkdir('/tty/tty')" },
    4, 1436701383, 30, { 0, "call mkdir('/tty/tty/tty')" },
    4, 1436701407, 35, { 0, "call mkdir('/usr/tty/tty', 'p')" },
    4, 1436701666, 35, { 0, "call mkdir('/tty/tty/tty', 'p')" },
    4, 1436708101, 25, { 0, "echo msgpackdump([1])" },
    4, 1436708966, 6, { 0, "cq" },
    4, 1436709606, 25, { 0, "echo msgpackdump([5])" },
    4, 1436709610, 26, { 0, "echo msgpackdump([10])" },
    4, 1436709615, 31, { 0, "echo msgpackdump([5, 5, 5])" },
    4, 1436709618, 35, { 0, "echo msgpackdump([5, 5, 5, 10])" },
    4, 1436709634, 57, {
      0,
      "echo msgpackdump([5, 5, 5, 10, [10, 20, {\"abc\": 1}]])"
    },
    4, 1436709651, 67, {
      0,
      "echo msgpackdump([5, 5, 5, 10, [10, 20, {\"abc\": 1, \"def\": 0}]])"
    },
    4, 1436709660, 70, {
      0,
      "echo msgpackdump([5, 5, 5, 10, [10, 20, {\"abc\": 1, \"def\": 0}], 0])"
    },
    4, 1436710095, 29, { 0, "echo msgpackparse([\"\\n\"])" },
    4, 1436710100, 28, { 0, "echo msgpackparse([\"j\"])" },
    4, 1436710109, 31, { 0, "echo msgpackparse([\"\", \"\"])" },
    4, 1436710424, 33, { 0, "echo msgpackparse([\"\", \"\\n\"])" },
    4, 1436710428, 32, { 0, "echo msgpackparse([\"\", \"j\"])" },
    4, 1436711142, 14, { 0, "echo mpack" },
    4, 1436711196, 45, { 0, "let lengths = map(mpack[:], 'len(v:val)')" },
    4, 1436711206, 16, { 0, "echo lengths" },
    4, 1436711244, 92, {
      0,
      ("let sum = len(lengths) - 1 | call map(copy(lengths), "
       .. "'extend(g:, {\"sum\": sum + v:val})')")
    },
    4, 1436711245, 12, { 0, "echo sum" },
    4, 1436711398, 10, { 0, "echo s" },
    4, 1436711404, 41, { 0, "let mpack = readfile('/tmp/foo', 'b')" },
    4, 1436711408, 41, { 0, "let shada_objects=msgpackparse(mpack)" },
    4, 1436711415, 22, { 0, "echo shada_objects" },
    4, 1436711451, 30, { 0, "e ~/.nvim/shada/main.shada" },
    4, 1436711454, 6, { 0, "qa" },
    4, 1436711442, 9, { 1, "test", 47 },
    4, 1436711443, 15, { 1, "aontsuesan", 47 },
    2, 1436711443, 38, { hlsearch=1, pat="aontsuesan", smartcase=1 },
    2, 0, 31, { islast=0, pat="", smartcase=1, sub=1 },
    3, 0, 3, { "" },
    10, 1436711451, 40, { file="/home/zyx/.nvim/shada/main.shada" },
    1, 1436711454, 78, {
      encoding="utf-8",
      max_kbyte=10,
      pid=19269,
      version="NVIM 0.0.0-alpha+201507121634"
    },
    8, 1436711451, 40, { file="/home/zyx/.nvim/shada/main.shada" },
    8, 1436711391, 8, { file="" },
    4, 1436700940, 30, { 0, "call mkdir('/tmp/tty/tty')" },
    4, 1436701355, 35, { 0, "call mkdir('/tmp/tty/tty', 'p')" },
    4, 1436701368, 24, { 0, "call mkdir('/', 'p')" },
    4, 1436701375, 26, { 0, "call mkdir('/tty/tty')" },
    4, 1436701383, 30, { 0, "call mkdir('/tty/tty/tty')" },
    4, 1436701407, 35, { 0, "call mkdir('/usr/tty/tty', 'p')" },
    4, 1436701666, 35, { 0, "call mkdir('/tty/tty/tty', 'p')" },
    4, 1436708101, 25, { 0, "echo msgpackdump([1])" },
    4, 1436708966, 6, { 0, "cq" },
    4, 1436709606, 25, { 0, "echo msgpackdump([5])" },
    4, 1436709610, 26, { 0, "echo msgpackdump([10])" },
    4, 1436709615, 31, { 0, "echo msgpackdump([5, 5, 5])" },
    4, 1436709618, 35, { 0, "echo msgpackdump([5, 5, 5, 10])" },
    4, 1436709634, 57, {
      0,
      "echo msgpackdump([5, 5, 5, 10, [10, 20, {\"abc\": 1}]])"
    },
    4, 1436709651, 67, {
      0,
      "echo msgpackdump([5, 5, 5, 10, [10, 20, {\"abc\": 1, \"def\": 0}]])"
    },
    4, 1436709660, 70, {
      0,
      "echo msgpackdump([5, 5, 5, 10, [10, 20, {\"abc\": 1, \"def\": 0}], 0])"
    },
    4, 1436710095, 29, { 0, "echo msgpackparse([\"\\n\"])" },
    4, 1436710100, 28, { 0, "echo msgpackparse([\"j\"])" },
    4, 1436710109, 31, { 0, "echo msgpackparse([\"\", \"\"])" },
    4, 1436710424, 33, { 0, "echo msgpackparse([\"\", \"\\n\"])" },
    4, 1436710428, 32, { 0, "echo msgpackparse([\"\", \"j\"])" },
    4, 1436711142, 14, { 0, "echo mpack" },
    4, 1436711196, 45, { 0, "let lengths = map(mpack[:], 'len(v:val)')" },
    4, 1436711206, 16, { 0, "echo lengths" },
    4, 1436711244, 92, {
      0,
      ("let sum = len(lengths) - 1 | call map(copy(lengths), "
       .. "'extend(g:, {\"sum\": sum + v:val})')")
    },
    4, 1436711245, 12, { 0, "echo sum" },
    4, 1436711398, 10, { 0, "echo s" },
    4, 1436711404, 41, { 0, "let mpack = readfile('/tmp/foo', 'b')" },
    4, 1436711408, 41, { 0, "let shada_objects=msgpackparse(mpack)" },
    4, 1436711415, 22, { 0, "echo shada_objects" },
    4, 1436711451, 30, { 0, "e ~/.nvim/shada/main.shada" },
    4, 1436711454, 6, { 0, "qa" },
    4, 1436711442, 9, { 1, "test", 47 },
    4, 1436711443, 15, { 1, "aontsuesan", 47 },
    2, 1436711443, 38, { hlsearch=1, pat="aontsuesan", smartcase=1 },
    2, 0, 31, { islast=0, pat="", smartcase=1, sub=1 },
    3, 0, 3, { "" },
    10, 1436711451, 40, { file="/home/zyx/.nvim/shada/main.shada" }
  }
  obj_test('are able to dump and restore rather big object', big_obj)

  obj_test('are able to dump and restore floating-point value', {0.125})

  it('can restore and dump UINT64_MAX', function()
    execute('let dumped = ["\\xCF" . repeat("\\xFF", 8)]')
    execute('let parsed = msgpackparse(dumped)')
    execute('let dumped2 = msgpackdump(parsed)')
    eq(1, eval('type(parsed[0]) == type(0) ' ..
               '|| parsed[0]._TYPE is v:msgpack_types.integer'))
    if eval('type(parsed[0]) == type(0)') == 1 then
      eq(1, eval('0xFFFFFFFFFFFFFFFF == parsed[0]'))
    else
      eq({_TYPE={}, _VAL={1, 3, 0x7FFFFFFF, 0x7FFFFFFF}}, eval('parsed[0]'))
    end
    eq(1, eval('dumped ==# dumped2'))
  end)

  it('can restore and dump INT64_MIN', function()
    execute('let dumped = ["\\xD3\\x80" . repeat("\\n", 7)]')
    execute('let parsed = msgpackparse(dumped)')
    execute('let dumped2 = msgpackdump(parsed)')
    eq(1, eval('type(parsed[0]) == type(0) ' ..
               '|| parsed[0]._TYPE is v:msgpack_types.integer'))
    if eval('type(parsed[0]) == type(0)') == 1 then
      eq(1, eval('-0x8000000000000000 == parsed[0]'))
    else
      eq({_TYPE={}, _VAL={-1, 2, 0, 0}}, eval('parsed[0]'))
    end
    eq(1, eval('dumped ==# dumped2'))
  end)

  it('can restore and dump BIN string with zero byte', function()
    execute('let dumped = ["\\xC4\\x01\\n"]')
    execute('let parsed = msgpackparse(dumped)')
    execute('let dumped2 = msgpackdump(parsed)')
    eq({{_TYPE={}, _VAL={'\n'}}}, eval('parsed'))
    eq(1, eval('parsed[0]._TYPE is v:msgpack_types.binary'))
    eq(1, eval('dumped ==# dumped2'))
  end)

  it('can restore and dump STR string with zero byte', function()
    execute('let dumped = ["\\xA1\\n"]')
    execute('let parsed = msgpackparse(dumped)')
    execute('let dumped2 = msgpackdump(parsed)')
    eq({{_TYPE={}, _VAL={'\n'}}}, eval('parsed'))
    eq(1, eval('parsed[0]._TYPE is v:msgpack_types.string'))
    eq(1, eval('dumped ==# dumped2'))
  end)

  it('can restore and dump BIN string with NL', function()
    execute('let dumped = ["\\xC4\\x01", ""]')
    execute('let parsed = msgpackparse(dumped)')
    execute('let dumped2 = msgpackdump(parsed)')
    eq({"\n"}, eval('parsed'))
    eq(1, eval('dumped ==# dumped2'))
  end)

  it('dump and restore special mapping with floating-point value', function()
    execute('let todump = {"_TYPE": v:msgpack_types.float, "_VAL": 0.125}')
    eq({0.125}, eval('msgpackparse(msgpackdump([todump]))'))
  end)
end)

describe('msgpackparse() function', function()
  before_each(clear)

  it('restores nil as v:null', function()
    execute('let dumped = ["\\xC0"]')
    execute('let parsed = msgpackparse(dumped)')
    eq('[v:null]', eval('string(parsed)'))
  end)

  it('restores boolean false as v:false', function()
    execute('let dumped = ["\\xC2"]')
    execute('let parsed = msgpackparse(dumped)')
    eq({false}, eval('parsed'))
  end)

  it('restores boolean true as v:true', function()
    execute('let dumped = ["\\xC3"]')
    execute('let parsed = msgpackparse(dumped)')
    eq({true}, eval('parsed'))
  end)

  it('restores FIXSTR as special dict', function()
    execute('let dumped = ["\\xa2ab"]')
    execute('let parsed = msgpackparse(dumped)')
    eq({{_TYPE={}, _VAL={'ab'}}}, eval('parsed'))
    eq(1, eval('g:parsed[0]._TYPE is v:msgpack_types.string'))
  end)

  it('restores BIN 8 as string', function()
    execute('let dumped = ["\\xC4\\x02ab"]')
    eq({'ab'}, eval('msgpackparse(dumped)'))
  end)

  it('restores FIXEXT1 as special dictionary', function()
    execute('let dumped = ["\\xD4\\x10", ""]')
    execute('let parsed = msgpackparse(dumped)')
    eq({{_TYPE={}, _VAL={0x10, {"", ""}}}}, eval('parsed'))
    eq(1, eval('g:parsed[0]._TYPE is v:msgpack_types.ext'))
  end)

  it('restores MAP with BIN key as special dictionary', function()
    execute('let dumped = ["\\x81\\xC4\\x01a\\xC4\\n"]')
    execute('let parsed = msgpackparse(dumped)')
    eq({{_TYPE={}, _VAL={{'a', ''}}}}, eval('parsed'))
    eq(1, eval('g:parsed[0]._TYPE is v:msgpack_types.map'))
  end)

  it('restores MAP with duplicate STR keys as special dictionary', function()
    execute('let dumped = ["\\x82\\xA1a\\xC4\\n\\xA1a\\xC4\\n"]')
    execute('let parsed = msgpackparse(dumped)')
    eq({{_TYPE={}, _VAL={ {{_TYPE={}, _VAL={'a'}}, ''},
                          {{_TYPE={}, _VAL={'a'}}, ''}}} }, eval('parsed'))
    eq(1, eval('g:parsed[0]._TYPE is v:msgpack_types.map'))
    eq(1, eval('g:parsed[0]._VAL[0][0]._TYPE is v:msgpack_types.string'))
    eq(1, eval('g:parsed[0]._VAL[1][0]._TYPE is v:msgpack_types.string'))
  end)

  it('restores MAP with MAP key as special dictionary', function()
    execute('let dumped = ["\\x81\\x80\\xC4\\n"]')
    execute('let parsed = msgpackparse(dumped)')
    eq({{_TYPE={}, _VAL={{{}, ''}}}}, eval('parsed'))
    eq(1, eval('g:parsed[0]._TYPE is v:msgpack_types.map'))
  end)

  it('msgpackparse(systemlist(...)) does not segfault. #3135', function()
    local cmd = "sort(keys(msgpackparse(systemlist('"
      ..helpers.nvim_prog.." --api-info'))[0]))"
    eval(cmd)
    eval(cmd)  -- do it again (try to force segfault)
    local api_info = eval(cmd)  -- do it again
    eq({'error_types', 'functions', 'types', 'version'}, api_info)
  end)

  it('fails when called with no arguments', function()
    eq('Vim(call):E119: Not enough arguments for function: msgpackparse',
       exc_exec('call msgpackparse()'))
  end)

  it('fails when called with two arguments', function()
    eq('Vim(call):E118: Too many arguments for function: msgpackparse',
       exc_exec('call msgpackparse(["", ""], 1)'))
  end)

  it('fails to parse a string', function()
    eq('Vim(call):E686: Argument of msgpackparse() must be a List',
       exc_exec('call msgpackparse("abcdefghijklmnopqrstuvwxyz")'))
  end)

  it('fails to parse a number', function()
    eq('Vim(call):E686: Argument of msgpackparse() must be a List',
       exc_exec('call msgpackparse(127)'))
  end)

  it('fails to parse a dictionary', function()
    eq('Vim(call):E686: Argument of msgpackparse() must be a List',
       exc_exec('call msgpackparse({})'))
  end)

  it('fails to parse a funcref', function()
    eq('Vim(call):E686: Argument of msgpackparse() must be a List',
       exc_exec('call msgpackparse(function("tr"))'))
  end)

  it('fails to parse a float', function()
    eq('Vim(call):E686: Argument of msgpackparse() must be a List',
       exc_exec('call msgpackparse(0.0)'))
  end)
end)

describe('msgpackdump() function', function()
  before_each(clear)

  it('dumps string as BIN 8', function()
    nvim('set_var', 'obj', {'Test'})
    eq({"\196\004Test"}, eval('msgpackdump(obj)'))
  end)

  it('can dump generic mapping with generic mapping keys and values', function()
    execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
    execute('let todumpv1 = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
    execute('let todumpv2 = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
    execute('call add(todump._VAL, [todumpv1, todumpv2])')
    eq({'\129\128\128'}, eval('msgpackdump([todump])'))
  end)

  it('can dump v:true', function()
    eq({'\195'}, funcs.msgpackdump({true}))
  end)

  it('can dump v:false', function()
    eq({'\194'}, funcs.msgpackdump({false}))
  end)

  it('can v:null', function()
    execute('let todump = v:null')
  end)

  it('can dump special bool mapping (true)', function()
    execute('let todump = {"_TYPE": v:msgpack_types.boolean, "_VAL": 1}')
    eq({'\195'}, eval('msgpackdump([todump])'))
  end)

  it('can dump special bool mapping (false)', function()
    execute('let todump = {"_TYPE": v:msgpack_types.boolean, "_VAL": 0}')
    eq({'\194'}, eval('msgpackdump([todump])'))
  end)

  it('can dump special nil mapping', function()
    execute('let todump = {"_TYPE": v:msgpack_types.nil, "_VAL": 0}')
    eq({'\192'}, eval('msgpackdump([todump])'))
  end)

  it('can dump special ext mapping', function()
    execute('let todump = {"_TYPE": v:msgpack_types.ext, "_VAL": [5, ["",""]]}')
    eq({'\212\005', ''}, eval('msgpackdump([todump])'))
  end)

  it('can dump special array mapping', function()
    execute('let todump = {"_TYPE": v:msgpack_types.array, "_VAL": [5, [""]]}')
    eq({'\146\005\145\196\n'}, eval('msgpackdump([todump])'))
  end)

  it('can dump special UINT64_MAX mapping', function()
    execute('let todump = {"_TYPE": v:msgpack_types.integer}')
    execute('let todump._VAL = [1, 3, 0x7FFFFFFF, 0x7FFFFFFF]')
    eq({'\207\255\255\255\255\255\255\255\255'}, eval('msgpackdump([todump])'))
  end)

  it('can dump special INT64_MIN mapping', function()
    execute('let todump = {"_TYPE": v:msgpack_types.integer}')
    execute('let todump._VAL = [-1, 2, 0, 0]')
    eq({'\211\128\n\n\n\n\n\n\n'}, eval('msgpackdump([todump])'))
  end)

  it('fails to dump a function reference', function()
    execute('let Todump = function("tr")')
    eq('Vim(call):E5004: Error while dumping msgpackdump() argument, index 0, itself: attempt to dump function reference',
       exc_exec('call msgpackdump([Todump])'))
  end)

  it('fails to dump a function reference in a list', function()
    execute('let todump = [function("tr")]')
    eq('Vim(call):E5004: Error while dumping msgpackdump() argument, index 0, index 0: attempt to dump function reference',
       exc_exec('call msgpackdump([todump])'))
  end)

  it('fails to dump a recursive list', function()
    execute('let todump = [[[]]]')
    execute('call add(todump[0][0], todump)')
    eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in index 0, index 0, index 0',
       exc_exec('call msgpackdump([todump])'))
  end)

  it('fails to dump a recursive dict', function()
    execute('let todump = {"d": {"d": {}}}')
    execute('call extend(todump.d.d, {"d": todump})')
    eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in key \'d\', key \'d\', key \'d\'',
       exc_exec('call msgpackdump([todump])'))
  end)

  it('can dump dict with two same dicts inside', function()
    execute('let inter = {}')
    execute('let todump = {"a": inter, "b": inter}')
    eq({"\130\161a\128\161b\128"}, eval('msgpackdump([todump])'))
  end)

  it('can dump list with two same lists inside', function()
    execute('let inter = []')
    execute('let todump = [inter, inter]')
    eq({"\146\144\144"}, eval('msgpackdump([todump])'))
  end)

  it('fails to dump a recursive list in a special dict', function()
    execute('let todump = {"_TYPE": v:msgpack_types.array, "_VAL": []}')
    execute('call add(todump._VAL, todump)')
    eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in index 0',
       exc_exec('call msgpackdump([todump])'))
  end)

  it('fails to dump a recursive (key) map in a special dict', function()
    execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
    execute('call add(todump._VAL, [todump, 0])')
    eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in index 1',
       exc_exec('call msgpackdump([todump])'))
  end)

  it('fails to dump a recursive (val) map in a special dict', function()
    execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
    execute('call add(todump._VAL, [0, todump])')
    eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in key 0 at index 0 from special map',
       exc_exec('call msgpackdump([todump])'))
  end)

  it('fails to dump a recursive (key) map in a special dict, _VAL reference', function()
    execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [[[], []]]}')
    execute('call add(todump._VAL[0][0], todump._VAL)')
    eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in key [[[[...@0], []]]] at index 0 from special map, index 0',
       exc_exec('call msgpackdump([todump])'))
  end)

  it('fails to dump a recursive (val) map in a special dict, _VAL reference', function()
    execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [[[], []]]}')
    execute('call add(todump._VAL[0][1], todump._VAL)')
    eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in key [] at index 0 from special map, index 0',
       exc_exec('call msgpackdump([todump])'))
  end)

  it('fails to dump a recursive (val) special list in a special dict',
  function()
    execute('let todump = {"_TYPE": v:msgpack_types.array, "_VAL": []}')
    execute('call add(todump._VAL, [0, todump._VAL])')
    eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in index 0, index 1',
       exc_exec('call msgpackdump([todump])'))
  end)

  it('fails when called with no arguments', function()
    eq('Vim(call):E119: Not enough arguments for function: msgpackdump',
       exc_exec('call msgpackdump()'))
  end)

  it('fails when called with two arguments', function()
    eq('Vim(call):E118: Too many arguments for function: msgpackdump',
       exc_exec('call msgpackdump(["", ""], 1)'))
  end)

  it('fails to dump a string', function()
    eq('Vim(call):E686: Argument of msgpackdump() must be a List',
       exc_exec('call msgpackdump("abcdefghijklmnopqrstuvwxyz")'))
  end)

  it('fails to dump a number', function()
    eq('Vim(call):E686: Argument of msgpackdump() must be a List',
       exc_exec('call msgpackdump(127)'))
  end)

  it('fails to dump a dictionary', function()
    eq('Vim(call):E686: Argument of msgpackdump() must be a List',
       exc_exec('call msgpackdump({})'))
  end)

  it('fails to dump a funcref', function()
    eq('Vim(call):E686: Argument of msgpackdump() must be a List',
       exc_exec('call msgpackdump(function("tr"))'))
  end)

  it('fails to dump a float', function()
    eq('Vim(call):E686: Argument of msgpackdump() must be a List',
       exc_exec('call msgpackdump(0.0)'))
  end)

  it('fails to dump special value', function()
    for _, val in ipairs({'v:true', 'v:false', 'v:null'}) do
      eq('Vim(call):E686: Argument of msgpackdump() must be a List',
        exc_exec('call msgpackdump(' .. val .. ')'))
    end
  end)

  it('can dump NULL string', function()
    eq({'\196\n'}, eval('msgpackdump([$XXX_UNEXISTENT_VAR_XXX])'))
    eq({'\196\n'}, eval('msgpackdump([{"_TYPE": v:msgpack_types.binary, "_VAL": [$XXX_UNEXISTENT_VAR_XXX]}])'))
    eq({'\160'}, eval('msgpackdump([{"_TYPE": v:msgpack_types.string, "_VAL": [$XXX_UNEXISTENT_VAR_XXX]}])'))
  end)

  it('can dump NULL list', function()
    eq({'\144'}, eval('msgpackdump([v:_null_list])'))
  end)

  it('can dump NULL dictionary', function()
    eq({'\128'}, eval('msgpackdump([v:_null_dict])'))
  end)
end)