" Tests for various functions.
source shared.vim
" Must be done first, since the alternate buffer must be unset.
func Test_00_bufexists()
call assert_equal(0, bufexists('does_not_exist'))
call assert_equal(1, bufexists(bufnr('%')))
call assert_equal(0, bufexists(0))
new Xfoo
let bn = bufnr('%')
call assert_equal(1, bufexists(bn))
call assert_equal(1, bufexists('Xfoo'))
call assert_equal(1, bufexists(getcwd() . '/Xfoo'))
call assert_equal(1, bufexists(0))
bw
call assert_equal(0, bufexists(bn))
call assert_equal(0, bufexists('Xfoo'))
endfunc
func Test_empty()
call assert_equal(1, empty(''))
call assert_equal(0, empty('a'))
call assert_equal(1, empty(0))
call assert_equal(1, empty(-0))
call assert_equal(0, empty(1))
call assert_equal(0, empty(-1))
call assert_equal(1, empty(0.0))
call assert_equal(1, empty(-0.0))
call assert_equal(0, empty(1.0))
call assert_equal(0, empty(-1.0))
call assert_equal(0, empty(1.0/0.0))
call assert_equal(0, empty(0.0/0.0))
call assert_equal(1, empty([]))
call assert_equal(0, empty(['a']))
call assert_equal(1, empty({}))
call assert_equal(0, empty({'a':1}))
call assert_equal(1, empty(v:null))
call assert_equal(1, empty(v:none))
call assert_equal(1, empty(v:false))
call assert_equal(0, empty(v:true))
if has('channel')
call assert_equal(1, empty(test_null_channel()))
endif
if has('job')
call assert_equal(1, empty(test_null_job()))
endif
call assert_equal(0, empty(function('Test_empty')))
endfunc
func Test_len()
call assert_equal(1, len(0))
call assert_equal(2, len(12))
call assert_equal(0, len(''))
call assert_equal(2, len('ab'))
call assert_equal(0, len([]))
call assert_equal(2, len([2, 1]))
call assert_equal(0, len({}))
call assert_equal(2, len({'a': 1, 'b': 2}))
call assert_fails('call len(v:none)', 'E701:')
call assert_fails('call len({-> 0})', 'E701:')
endfunc
func Test_max()
call assert_equal(0, max([]))
call assert_equal(2, max([2]))
call assert_equal(2, max([1, 2]))
call assert_equal(2, max([1, 2, v:null]))
call assert_equal(0, max({}))
call assert_equal(2, max({'a':1, 'b':2}))
call assert_fails('call max(1)', 'E712:')
call assert_fails('call max(v:none)', 'E712:')
endfunc
func Test_min()
call assert_equal(0, min([]))
call assert_equal(2, min([2]))
call assert_equal(1, min([1, 2]))
call assert_equal(0, min([1, 2, v:null]))
call assert_equal(0, min({}))
call assert_equal(1, min({'a':1, 'b':2}))
call assert_fails('call min(1)', 'E712:')
call assert_fails('call min(v:none)', 'E712:')
endfunc
func Test_strwidth()
for aw in ['single', 'double']
exe 'set ambiwidth=' . aw
call assert_equal(0, strwidth(''))
call assert_equal(1, strwidth("\t"))
call assert_equal(3, strwidth('Vim'))
call assert_equal(4, strwidth(1234))
call assert_equal(5, strwidth(-1234))
call assert_equal(2, strwidth('😉'))
call assert_equal(17, strwidth('Eĥoŝanĝo ĉiuĵaŭde'))
call assert_equal((aw == 'single') ? 6 : 7, strwidth('Straße'))
call assert_fails('call strwidth({->0})', 'E729:')
call assert_fails('call strwidth([])', 'E730:')
call assert_fails('call strwidth({})', 'E731:')
call assert_fails('call strwidth(1.2)', 'E806:')
endfor
set ambiwidth&
endfunc
func Test_str2nr()
call assert_equal(0, str2nr(''))
call assert_equal(1, str2nr('1'))
call assert_equal(1, str2nr(' 1 '))
call assert_equal(1, s