path: root/src/testdir/test_vim9_script.vim

" Test various aspects of the Vim9 script language.

source check.vim

" Check that "lines" inside ":def" results in an "error" message.
func CheckDefFailure(lines, error)
  call writefile(['def Func()'] + a:lines + ['enddef'], 'Xdef')
  call assert_fails('so Xdef', a:error, a:lines)
  call delete('Xdef')
endfunc

func CheckScriptFailure(lines, error)
  call writefile(a:lines, 'Xdef')
  call assert_fails('so Xdef', a:error, a:lines)
  call delete('Xdef')
endfunc

def Test_syntax()
  let var = 234
  let other: list<string> = ['asdf']
enddef

func Test_def_basic()
  def SomeFunc(): string
    return 'yes'
  enddef
  call assert_equal('yes', SomeFunc())
endfunc

let s:appendToMe = 'xxx'
let s:addToMe = 111
let g:existing = 'yes'

def Test_assignment()
  let bool1: bool = true
  assert_equal(v:true, bool1)
  let bool2: bool = false
  assert_equal(v:false, bool2)

  let list1: list<string> = ['sdf', 'asdf']
  let list2: list<number> = [1, 2, 3]

  let listS: list<string> = []
  let listN: list<number> = []

  let dict1: dict<string> = #{key: 'value'}
  let dict2: dict<number> = #{one: 1, two: 2}

  g:newvar = 'new'
  assert_equal('new', g:newvar)

  assert_equal('yes', g:existing)
  g:existing = 'no'
  assert_equal('no', g:existing)

  v:char = 'abc'
  assert_equal('abc', v:char)

  $ENVVAR = 'foobar'
  assert_equal('foobar', $ENVVAR)
  $ENVVAR = ''

  s:appendToMe ..= 'yyy'
  assert_equal('xxxyyy', s:appendToMe)
  s:addToMe += 222
  assert_equal(333, s:addToMe)
  s:newVar = 'new'
  assert_equal('new', s:newVar)
enddef

func Test_assignment_failure()
  call CheckDefFailure(['let var=234'], 'E1004:')
  call CheckDefFailure(['let var =234'], 'E1004:')
  call CheckDefFailure(['let var= 234'], 'E1004:')

  call CheckDefFailure(['let true = 1'], 'E1034:')
  call CheckDefFailure(['let false = 1'], 'E1034:')

  call CheckDefFailure(['let var: list<string> = [123]'], 'expected list<string> but got list<number>')
  call CheckDefFailure(['let var: list<number> = ["xx"]'], 'expected list<number> but got list<string>')

  call CheckDefFailure(['let var: dict<string> = #{key: 123}'], 'expected dict<string> but got dict<number>')
  call CheckDefFailure(['let var: dict<number> = #{key: "xx"}'], 'expected dict<number> but got dict<string>')

  call CheckDefFailure(['let var = feedkeys("0")'], 'E1031:')
  call CheckDefFailure(['let var: number = feedkeys("0")'], 'expected number but got void')
endfunc

func Test_const()
  call CheckDefFailure(['const var = 234', 'var = 99'], 'E1018:')
  call CheckDefFailure(['const one = 234', 'let one = 99'], 'E1017:')
  call CheckDefFailure(['const two'], 'E1021:')
endfunc

def Test_block()
  let outer = 1
  {
    let inner = 2
    assert_equal(1, outer)
    assert_equal(2, inner)
  }
  assert_equal(1, outer)
enddef

func Test_block_failure()
  call CheckDefFailure(['{', 'let inner = 1', '}', 'echo inner'], 'E1001:')
endfunc

def ReturnString(): string
  return 'string'
enddef

def ReturnNumber(): number
  return 123
enddef

let g:notNumber = 'string'

def ReturnGlobal(): number
  return g:notNumber
enddef

def Test_return_string()
  assert_equal('string', ReturnString())
  assert_equal(123, ReturnNumber())
  assert_fails('call ReturnGlobal()', 'E1029: Expected number but got string')
enddef

func Increment()
  let g:counter += 1
endfunc

def Test_call_ufunc_count()
  g:counter = 1
  Increment()
  Increment()
  Increment()
  " works with and without :call
  assert_equal(4, g:counter)
  call assert_equal(4, g:counter)
  unlet g:counter
enddef

def MyVarargs(arg: string, ...rest: list<string>): string
  let res = arg
  for s in rest
    res ..= ',' .. s
  endfor
  return res
enddef

def Test_call_varargs()
  assert_equal('one', MyVarargs('one'))
  assert_equal('one,two', MyVarargs('one', 'two'))
  assert_equal('one,two,three', MyVarargs('one', 'two', 'three'))
enddef

def MyDefaultArgs(name = 'string'): string
  return name
enddef

def Test_call_default_args()
  assert_equal('string', MyDefaultArgs())
  assert_equal('one', MyDefaultArgs('one'))
  assert_fails('call MyDefaultArgs("one", "two")', 'E118:')
enddef

func Test_call_default_args_from_func()
  call assert_equal('string', MyDefaultArgs())
  call assert_equal('one', MyDefaultArgs('one'))
  call assert_fails('call MyDefaultArgs("one", "two")', 'E118:')
endfunc

" Default arg and varargs
def MyDefVarargs(one: string, two = 'foo', ...rest: list<string>): string
  let res = one .. ',' .. two
  for s in rest
    res ..= ',' .. s
  endfor
  return res
enddef

def Test_call_def_varargs()
  call assert_fails('call MyDefVarargs()', 'E119:')
  assert_equal('one,foo', MyDefVarargs('one'))
  assert_equal('one,two', MyDefVarargs('one', 'two'))
  assert_equal('one,two,three', MyDefVarargs('one', 'two', 'three'))
enddef


"def Test_call_func_defined_later()
"  call assert_equal('one', DefineLater('one'))
"  call assert_fails('call NotDefined("one")', 'E99:')
"enddef

func DefineLater(arg)
  return a:arg
endfunc

def Test_return_type_wrong()
  CheckScriptFailure(['def Func(): number', 'return "a"', 'enddef'], 'expected number but got string')
  CheckScriptFailure(['def Func(): string', 'return 1', 'enddef'], 'expected string but got number')
  CheckScriptFailure(['def Func(): void', 'return "a"', 'enddef'], 'expected void but got string')
  CheckScriptFailure(['def Func()', 'return "a"', 'enddef'], 'expected void but got string')
enddef

def Test_arg_type_wrong()
  CheckScriptFailure(['def Func3(items: list)', 'echo "a"', 'enddef'], 'E1008: Missing <type>')
enddef

def Test_try_catch()
  let l = []
  try
    add(l, '1')
    throw 'wrong'
    add(l, '2')
  catch
    add(l, v:exception)
  finally
    add(l, '3')
  endtry
  assert_equal(['1', 'wrong', '3'], l)
enddef

def ThrowFromDef()
  throw 'getout'
enddef

func CatchInFunc()
  try
    call ThrowFromDef()
  catch
    let g:thrown_func = v:exception
  endtry
endfunc

def CatchInDef()
  try
    ThrowFromDef()
  catch
    g:thrown_def = v:exception
  endtry
enddef

def ReturnFinally(): string
  try
    return 'intry'
  finally
    g:in_finally = 'finally'
  endtry
  return 'end'
enddef

def Test_try_catch_nested()
  CatchInFunc()
  assert_equal('getout', g:thrown_func)

  CatchInDef()
  assert_equal('getout', g:thrown_def)

  assert_equal('intry', ReturnFinally())
  assert_equal('finally', g:in_finally)
enddef

def Test_try_catch_match()
  let seq = 'a'
  try
    throw 'something'
  catch /nothing/
    seq ..= 'x'
  catch /some/
    seq ..= 'b'
  catch /asdf/
    seq ..= 'x'
  finally
    seq ..= 'c'
  endtry
  assert_equal('abc', seq)
enddef

let s:export_script_lines =<< trim END
  vim9script
  let name: string = 'bob'
  def Concat(arg: string): string
    return name .. arg
  enddef
  let g:result = Concat('bie')
  let g:localname = name

  export const CONST = 1234
  export let exported = 9876
  export let exp_name = 'John'
  export def Exported(): string
    return 'Exported'
  enddef
END

def Test_vim9script()
  let import_script_lines =<< trim END
    vim9script
    import {exported, Exported} from './Xexport.vim'
    g:imported = exported
    exported += 3
    g:imported_added = exported
    g:imported_func = Exported()

    import {exp_name} from './Xexport.vim'
    g:imported_name = exp_name
    exp_name ..= ' Doe'
    g:imported_name_appended = exp_name
  END

  writefile(import_script_lines, 'Ximport.vim')
  writefile(s:export_script_lines, 'Xexport.vim')

  source Ximport.vim

  assert_equal('bobbie', g:result)
  assert_equal('bob', g:localname)
  assert_equal(9876, g:imported)
  assert_equal(9879, g:imported_added)
  assert_equal('Exported', g:imported_func)
  assert_equal('John', g:imported_name)
  assert_equal('John Doe', g:imported_name_appended)
  assert_false(exists('g:name'))

  unlet g:result
  unlet g:localname
  unlet g:imported
  unlet g:imported_added
  unlet g:imported_func
  unlet g:imported_name g:imported_name_appended
  delete('Ximport.vim')
  delete('Xexport.vim')

  CheckScriptFailure(['scriptversion 2', 'vim9script'], 'E1039:')
  CheckScriptFailure(['vim9script', 'scriptversion 2'], 'E1040:')
enddef

def Test_vim9script_call()
  let lines =<< trim END
    vim9script
    let var = ''
    def MyFunc(arg: string)
       var = arg
    enddef
    MyFunc('foobar')
    assert_equal('foobar', var)

    let str = 'barfoo'
    str->MyFunc()
    assert_equal('barfoo', var)

    let g:value = 'value'
    g:value->MyFunc()
    assert_equal('value', var)

    let listvar = []
    def ListFunc(arg: list<number>)
       listvar = arg
    enddef
    [1, 2, 3]->ListFunc()
    assert_equal([1, 2, 3], listvar)

    let dictvar = {}
    def DictFunc(arg: dict<number>)
       dictvar = arg
    enddef
    {'a': 1, 'b': 2}->DictFunc()
    assert_equal(#{a: 1, b: 2}, dictvar)
    #{a: 3, b: 4}->DictFunc()
    assert_equal(#{a: 3, b: 4}, dictvar)

    ('text')->MyFunc()
    assert_equal('text', var)
    ("some")->MyFunc()
    assert_equal('some', var)
  END
  writefile(lines, 'Xcall.vim')
  source Xcall.vim
  delete('Xcall.vim')
enddef

def Test_vim9script_call_fail_decl()
  let lines =<< trim END
    vim9script
    let var = ''
    def MyFunc(arg: string)
       let var = 123
    enddef
  END
  writefile(lines, 'Xcall_decl.vim')
  assert_fails('source Xcall_decl.vim', 'E1054:')
  delete('Xcall_decl.vim')
enddef

def Test_vim9script_call_fail_const()
  let lines =<< trim END
    vim9script
    const var = ''
    def MyFunc(arg: string)
       var = 'asdf'
    enddef
  END
  writefile(lines, 'Xcall_const.vim')
  assert_fails('source Xcall_const.vim', 'E46:')
  delete('Xcall_const.vim')
enddef

def Test_vim9script_reload()
  let lines =<< trim END
    vim9script
    const var = ''
    let valone = 1234
    def MyFunc(arg: string)
       valone = 5678
    enddef
  END
  let morelines =<< trim END
    let valtwo = 222
    export def GetValtwo(): number
      return valtwo
    enddef
  END
  writefile(lines</