neovim/test/functional/shada/buffers_spec.lua

-- shada buffer list saving/reading support
local helpers = require('test.functional.helpers')(after_each)
local nvim_command, funcs, eq, curbufmeths =
  helpers.command, helpers.funcs, helpers.eq, helpers.curbufmeths
local expect_exit = helpers.expect_exit

local shada_helpers = require('test.functional.shada.helpers')
local reset, clear = shada_helpers.reset, shada_helpers.clear

describe('shada support code', function()
  local testfilename = 'Xtestfile-functional-shada-buffers'
  local testfilename_2 = 'Xtestfile-functional-shada-buffers-2'
  after_each(clear)

  it('is able to dump and restore buffer list', function()
    reset('set shada+=%')
    nvim_command('edit ' .. testfilename)
    nvim_command('edit ' .. testfilename_2)
    expect_exit(nvim_command, 'qall')
    reset('set shada+=%')
    eq(3, funcs.bufnr('$'))
    eq('', funcs.bufname(1))
    eq(testfilename, funcs.bufname(2))
    eq(testfilename_2, funcs.bufname(3))
  end)

  it('does not restore buffer list without % in &shada', function()
    reset('set shada+=%')
    nvim_command('edit ' .. testfilename)
    nvim_command('edit ' .. testfilename_2)
    expect_exit(nvim_command, 'qall')
    reset()
    eq(1, funcs.bufnr('$'))
    eq('', funcs.bufname(1))
  end)

  it('does not dump buffer list without % in &shada', function()
    reset()
    nvim_command('edit ' .. testfilename)
    nvim_command('edit ' .. testfilename_2)
    expect_exit(nvim_command, 'qall')
    reset('set shada+=%')
    eq(1, funcs.bufnr('$'))
    eq('', funcs.bufname(1))
  end)

  it('does not dump unlisted buffer', function()
    reset('set shada+=%')
    nvim_command('edit ' .. testfilename)
    nvim_command('edit ' .. testfilename_2)
    curbufmeths.set_option('buflisted', false)
    expect_exit(nvim_command, 'qall')
    reset('set shada+=%')
    eq(2, funcs.bufnr('$'))
    eq('', funcs.bufname(1))
    eq(testfilename, funcs.bufname(2))
  end)

  it('does not dump quickfix buffer', function()
    reset('set shada+=%')
    nvim_command('edit ' .. testfilename)
    nvim_command('edit ' .. testfilename_2)
    curbufmeths.set_option('buftype', 'quickfix')
    expect_exit(nvim_command, 'qall')
    reset('set shada+=%')
    eq(2, funcs.bufnr('$'))
    eq('', funcs.bufname(1))
    eq(testfilename, funcs.bufname(2))
  end)

  it('does not dump unnamed buffers', function()
    reset('set shada+=% hidden')
    curbufmeths.set_lines(0, 1, true, {'foo'})
    nvim_command('enew')
    curbufmeths.set_lines(0, 1, true, {'bar'})
    eq(2, funcs.bufnr('$'))
    expect_exit(nvim_command, 'qall!')
    reset('set shada+=% hidden')
    eq(1, funcs.bufnr('$'))
    eq('', funcs.bufname(1))
  end)

  it('restores 1 buffer with %1 in &shada, #5759', function()
    reset('set shada+=%1')
    nvim_command('edit ' .. testfilename)
    nvim_command('edit ' .. testfilename_2)
    expect_exit(nvim_command, 'qall')
    reset('set shada+=%1')
    eq(2, funcs.bufnr('$'))
    eq('', funcs.bufname(1))
    eq(testfilename, funcs.bufname(2))
  end)
end)