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

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]

  " TODO: does not work yet
  " let listS: list<string> = []
  " let listN: list<number> = []

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

def Test_return_string()
  assert_equal('string', ReturnString())
  assert_equal(123, ReturnNumber())
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 Test_return_type_wrong()
  " TODO: why is ! needed for Mac and FreeBSD?
  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_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

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 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
    g:imported_func = Exported()
  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('Exported', g:imported_func)
  assert_false(exists('g:name'))

  unlet g:result
  unlet g:localname
  unlet g:imported
  unlet g:imported_func
  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)
  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 + morelines, 'Xreload.vim')
  source Xreload.vim
  source Xreload.vim
  source Xreload.vim

  let testlines =<< trim END
    vim9script
    def TheFunc()
      import GetValtwo from './Xreload.vim'
      assert_equal(222, GetValtwo())
    enddef
    TheFunc()
  END
  writefile(testlines, 'Ximport.vim')
  source Ximport.vim

  " test that when not using "morelines" valtwo is still defined
  " need to source Xreload.vim again, import doesn't reload a script
  writefile(lines, 'Xreload.vim')
  source Xreload.vim
  source Ximport.vim

  " cannot declare a var twice
  lines =<< trim END
    vim9script
    let valone = 1234
    let valone = 5678
  END
  writefile(lines, 'Xreload.vim')
  assert_fails('source Xreload.vim', 'E1041:')

  delete('Xreload.vim')
  delete('Ximport.vim')
enddef

def Test_import_absolute()
  let import_lines = [
        \ 'vim9script',
        \ 'import exported from "' .. escape(getcwd(), '\') .. '/Xexport_abs.vim"',
        \ 'g:imported_abs = exported',
        \ ]
  writefile(import_lines, 'Ximport_abs.vim')
  writefile(s:export_script_lines, 'Xexport_abs.vim')

  source Ximport_abs.vim

  assert_equal(9876, g:imported_abs)
  unlet g:imported_abs

  delete('Ximport_abs.vim')
  delete('Xexport_abs.vim')
enddef

def Test_import_rtp()
  let import_lines = [
        \ 'vim9script',
        \ 'import exported from "Xexport_rtp.vim"',
        \ 'g:imported_rtp = exported',
        \ ]
  writefile(import_lines, 'Ximport_rtp.vim')
  mkdir('import')
  writefile(s:export_script_lines, 'import/Xexport_rtp.vim')

  let save_rtp = &rtp
  &rtp = getcwd()
  source Ximport_rtp.vim
  &rtp = save_rtp

  assert_equal(9876, g:imported_rtp)
  unlet g:imported_rtp

  delete('Ximport_rtp.vim')
  delete('import/Xexport_rtp.vim')
  delete('import', 'd')
enddef

def Test_fixed_size_list()
  " will be allocated as one piece of memory, check that changes work
  let l = [1, 2, 3, 4]
  l->remove(0)
  l->add(5)
  l->insert(99, 1)
  call assert_equal([2, 99, 3, 4, 5], l)
enddef

" Test that inside :function a Python function can be defined, :def is not
" recognized.
func Test_function_python()
  CheckFeature python3
  let py = 'python3'
  execute py "<< EOF"
def do_something():
  return 1
EOF
endfunc


" vim: ts=8 sw=2 sts=2 expandtab tw=80 fdm=marker