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https://github.com/neovim/neovim.git
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1e3d9c7dbc
Allows using `undo!` to undo changes and remove them from the undo-tree. Can only be used for moving backwards in the same undo branch.
129 lines
3.7 KiB
Lua
129 lines
3.7 KiB
Lua
local helpers = require('test.functional.helpers')(after_each)
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local clear = helpers.clear
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local command = helpers.command
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local eval = helpers.eval
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local expect = helpers.expect
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local eq = helpers.eq
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local feed = helpers.feed
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local feed_command = helpers.feed_command
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local insert = helpers.insert
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local funcs = helpers.funcs
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local function lastmessage()
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local messages = funcs.split(funcs.execute('messages'), '\n')
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return messages[#messages]
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end
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describe('u CTRL-R g- g+', function()
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before_each(clear)
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local function create_history(num_steps)
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if num_steps == 0 then return end
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insert('1')
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if num_steps == 1 then return end
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feed('o2<esc>')
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feed('o3<esc>')
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feed('u')
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if num_steps == 2 then return end
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feed('o4<esc>')
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if num_steps == 3 then return end
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feed('u')
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end
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local function undo_and_redo(hist_pos, undo, redo, expect_str)
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command('enew!')
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create_history(hist_pos)
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local cur_contents = helpers.curbuf_contents()
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feed(undo)
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expect(expect_str)
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feed(redo)
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expect(cur_contents)
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end
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-- TODO Look for message saying 'Already at oldest change'
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it('does nothing when no changes have happened', function()
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undo_and_redo(0, 'u', '<C-r>', '')
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undo_and_redo(0, 'g-', 'g+', '')
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end)
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it('undoes a change when at a leaf', function()
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undo_and_redo(1, 'u', '<C-r>', '')
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undo_and_redo(1, 'g-', 'g+', '')
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end)
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it('undoes a change when in a non-leaf', function()
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undo_and_redo(2, 'u', '<C-r>', '1')
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undo_and_redo(2, 'g-', 'g+', '1')
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end)
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it('undoes properly around a branch point', function()
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undo_and_redo(3, 'u', '<C-r>', [[
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1
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2]])
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undo_and_redo(3, 'g-', 'g+', [[
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1
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2
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3]])
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end)
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it('can find the previous sequence after undoing to a branch', function()
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undo_and_redo(4, 'u', '<C-r>', '1')
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undo_and_redo(4, 'g-', 'g+', '1')
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end)
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end)
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describe(':undo! command', function()
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before_each(function()
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clear()
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feed('i1 little bug in the code<Esc>')
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feed('o1 little bug in the code<Esc>')
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feed('oTake 1 down, patch it around<Esc>')
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feed('o99 little bugs in the code<Esc>')
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end)
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it('works', function()
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feed_command('undo!')
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expect([[
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1 little bug in the code
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1 little bug in the code
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Take 1 down, patch it around]])
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feed('<C-r>')
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eq('Already at newest change', lastmessage())
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end)
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it('works with arguments', function()
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feed_command('undo! 2')
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expect([[
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1 little bug in the code
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1 little bug in the code]])
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feed('<C-r>')
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eq('Already at newest change', lastmessage())
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end)
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it('correctly sets alternative redo', function()
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feed('uo101 little bugs in the code<Esc>')
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feed_command('undo!')
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feed('<C-r>')
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expect([[
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1 little bug in the code
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1 little bug in the code
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Take 1 down, patch it around
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99 little bugs in the code]])
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feed('uuoTake 2 down, patch them around<Esc>')
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feed('o101 little bugs in the code<Esc>')
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feed_command('undo! 2')
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feed('<C-r><C-r>')
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expect([[
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1 little bug in the code
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1 little bug in the code
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Take 1 down, patch it around
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99 little bugs in the code]])
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end)
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it('fails when attempting to redo or move to different undo branch', function()
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feed_command('undo! 4')
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eq('E5767: Cannot use :undo! to redo or move to a different undo branch', eval('v:errmsg'))
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feed('u')
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feed_command('undo! 4')
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eq('E5767: Cannot use :undo! to redo or move to a different undo branch', eval('v:errmsg'))
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feed('o101 little bugs in the code<Esc>')
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feed('o101 little bugs in the code<Esc>')
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feed_command('undo! 4')
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eq('E5767: Cannot use :undo! to redo or move to a different undo branch', eval('v:errmsg'))
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end)
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end)
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