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path: root/src/nvim/testdir/test_expr.vim
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" Tests for expressions.

func Test_strgetchar()
  call assert_equal(char2nr('a'), strgetchar('axb', 0))
  call assert_equal(char2nr('x'), strgetchar('axb', 1))
  call assert_equal(char2nr('b'), strgetchar('axb', 2))

  call assert_equal(-1, strgetchar('axb', -1))
  call assert_equal(-1, strgetchar('axb', 3))
  call assert_equal(-1, strgetchar('', 0))
endfunc

func Test_strcharpart()
  call assert_equal('a', strcharpart('axb', 0, 1))
  call assert_equal('x', strcharpart('axb', 1, 1))
  call assert_equal('b', strcharpart('axb', 2, 1))
  call assert_equal('xb', strcharpart('axb', 1))

  call assert_equal('', strcharpart('axb', 1, 0))
  call assert_equal('', strcharpart('axb', 1, -1))
  call assert_equal('', strcharpart('axb', -1, 1))
  call assert_equal('', strcharpart('axb', -2, 2))

  call assert_equal('a', strcharpart('axb', -1, 2))
endfunc

func Test_dict()
  let d = {'': 'empty', 'a': 'a', 0: 'zero'}
  call assert_equal('empty', d[''])
  call assert_equal('a', d['a'])
  call assert_equal('zero', d[0])
  call assert_true(has_key(d, ''))
  call assert_true(has_key(d, 'a'))

  let d[''] = 'none'
  let d['a'] = 'aaa'
  call assert_equal('none', d[''])
  call assert_equal('aaa', d['a'])
endfunc