1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
local t = require('test.testutil')
local n = require('test.functional.testnvim')()
local clear = n.clear
local command = n.command
local eval = n.eval
local expect = n.expect
local eq = t.eq
local feed = n.feed
local feed_command = n.feed_command
local insert = n.insert
local fn = n.fn
local exec = n.exec
local exec_lua = n.exec_lua
local function lastmessage()
local messages = fn.split(fn.execute('messages'), '\n')
return messages[#messages]
end
describe('u CTRL-R g- g+', function()
before_each(clear)
local function create_history(num_steps)
if num_steps == 0 then
return
end
insert('1')
if num_steps == 1 then
return
end
feed('o2<esc>')
feed('o3<esc>')
feed('u')
if num_steps == 2 then
return
end
feed('o4<esc>')
if num_steps == 3 then
return
end
feed('u')
end
local function undo_and_redo(hist_pos, undo, redo, expect_str)
command('enew!')
create_history(hist_pos)
local cur_contents = n.curbuf_contents()
feed(undo)
expect(expect_str)
feed(redo)
expect(cur_contents)
end
-- TODO Look for message saying 'Already at oldest change'
it('does nothing when no changes have happened', function()
undo_and_redo(0, 'u', '<C-r>', '')
undo_and_redo(0, 'g-', 'g+', '')
end)
it('undoes a change when at a leaf', function()
undo_and_redo(1, 'u', '<C-r>', '')
undo_and_redo(1, 'g-', 'g+', '')
end)
it('undoes a change when in a non-leaf', function()
undo_and_redo(2, 'u', '<C-r>', '1')
undo_and_redo(2, 'g-', 'g+', '1')
end)
it('undoes properly around a branch point', function()
undo_and_redo(
3,
'u',
'<C-r>',
[[
1
2]]
)
undo_and_redo(
3,
'g-',
'g+',
[[
1
2
3]]
)
end)
it('can find the previous sequence after undoing to a branch', function()
undo_and_redo(4, 'u', '<C-r>', '1')
undo_and_redo(4, 'g-', 'g+', '1')
end)
describe('undo works correctly when writing in Insert mode', function()
before_each(function()
exec([[
edit Xtestfile.txt
set undolevels=100 undofile
write
]])
end)
after_each(function()
command('bwipe!')
os.remove('Xtestfile.txt')
os.remove('Xtestfile.txt.un~')
end)
-- oldtest: Test_undo_after_write()
it('using <Cmd> mapping', function()
command('imap . <Cmd>write<CR>')
feed('Otest.<CR>boo!!!<Esc>')
expect([[
test
boo!!!
]])
feed('u')
expect([[
test
]])
feed('u')
expect('')
end)
it('using Lua mapping', function()
exec_lua([[
vim.api.nvim_set_keymap('i', '.', '', {callback = function()
vim.cmd('write')
end})
]])
feed('Otest.<CR>boo!!!<Esc>')
expect([[
test
boo!!!
]])
feed('u')
expect([[
test
]])
feed('u')
expect('')
end)
it('using RPC call', function()
feed('Otest')
command('write')
feed('<CR>boo!!!<Esc>')
expect([[
test
boo!!!
]])
feed('u')
expect([[
test
]])
feed('u')
expect('')
end)
end)
end)
describe(':undo! command', function()
before_each(function()
clear()
feed('i1 little bug in the code<Esc>')
feed('o1 little bug in the code<Esc>')
feed('oTake 1 down, patch it around<Esc>')
feed('o99 little bugs in the code<Esc>')
end)
it('works', function()
feed_command('undo!')
expect([[
1 little bug in the code
1 little bug in the code
Take 1 down, patch it around]])
feed('<C-r>')
eq('Already at newest change', lastmessage())
end)
it('works with arguments', function()
feed_command('undo! 2')
expect([[
1 little bug in the code
1 little bug in the code]])
feed('<C-r>')
eq('Already at newest change', lastmessage())
end)
it('correctly sets alternative redo', function()
feed('uo101 little bugs in the code<Esc>')
feed_command('undo!')
feed('<C-r>')
expect([[
1 little bug in the code
1 little bug in the code
Take 1 down, patch it around
99 little bugs in the code]])
feed('uuoTake 2 down, patch them around<Esc>')
feed('o101 little bugs in the code<Esc>')
feed_command('undo! 2')
feed('<C-r><C-r>')
expect([[
1 little bug in the code
1 little bug in the code
Take 1 down, patch it around
99 little bugs in the code]])
end)
it('fails when attempting to redo or move to different undo branch', function()
feed_command('undo! 4')
eq('E5767: Cannot use :undo! to redo or move to a different undo branch', eval('v:errmsg'))
feed('u')
feed_command('undo! 4')
eq('E5767: Cannot use :undo! to redo or move to a different undo branch', eval('v:errmsg'))
feed('o101 little bugs in the code<Esc>')
feed('o101 little bugs in the code<Esc>')
feed_command('undo! 4')
eq('E5767: Cannot use :undo! to redo or move to a different undo branch', eval('v:errmsg'))
end)
end)
|
