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
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
|
-- Tests for undo tree and :earlier and :later.
local t = require('test.testutil')
local n = require('test.functional.testnvim')()
local feed_command = n.feed_command
local write_file = t.write_file
local command = n.command
local source = n.source
local expect = n.expect
local clear = n.clear
local feed = n.feed
local eval = n.eval
local eq = t.eq
local function expect_empty_buffer()
-- The space will be removed by t.dedent but is needed because dedent
-- will fail if it can not find the common indent of the given lines.
return expect(' ')
end
local function expect_line(line)
return eq(line, eval('getline(".")'))
end
describe('undo tree:', function()
before_each(clear)
local fname = 'Xtest_functional_legacy_undotree'
teardown(function()
os.remove(fname .. '.source')
end)
describe(':earlier and :later', function()
before_each(function()
os.remove(fname)
end)
teardown(function()
os.remove(fname)
end)
it('time specifications, g- g+', function()
-- We write the test text to a file in order to prevent nvim to record
-- the inserting of the text into the undo history.
write_file(fname, '\n123456789\n')
-- `:earlier` and `:later` are (obviously) time-sensitive, so this test
-- sometimes fails if the system is under load. It is wrapped in a local
-- function to allow multiple attempts.
local function test_earlier_later()
clear()
feed_command('e ' .. fname)
-- Assert that no undo history is present.
eq({}, eval('undotree().entries'))
-- Delete three characters and undo.
feed('Gxxx')
expect_line('456789')
feed('g-')
expect_line('3456789')
feed('g-')
expect_line('23456789')
feed('g-')
expect_line('123456789')
feed('g-')
expect_line('123456789')
-- Delete three other characters and go back in time step by step.
feed('$xxx')
expect_line('123456')
command('sleep 1')
feed('g-')
expect_line('1234567')
feed('g-')
expect_line('12345678')
feed('g-')
expect_line('456789')
feed('g-')
expect_line('3456789')
feed('g-')
expect_line('23456789')
feed('g-')
expect_line('123456789')
feed('g-')
expect_line('123456789')
feed('g-')
expect_line('123456789')
feed('10g+')
expect_line('123456')
-- Delay for two seconds and go some seconds forward and backward.
command('sleep 2')
feed('Aa<esc>')
feed('Ab<esc>')
feed('Ac<esc>')
expect_line('123456abc')
feed_command('earlier 1s')
expect_line('123456')
feed_command('earlier 3s')
expect_line('123456789')
feed_command('later 1s')
expect_line('123456')
feed_command('later 1h')
expect_line('123456abc')
end
t.retry(2, nil, test_earlier_later)
end)
it('file-write specifications', function()
feed('ione one one<esc>')
feed_command('w ' .. fname)
feed('otwo<esc>')
feed('otwo<esc>')
feed_command('w')
feed('othree<esc>')
feed_command('earlier 1f')
expect([[
one one one
two
two]])
feed_command('earlier 1f')
expect('one one one')
feed_command('earlier 1f')
expect_empty_buffer()
feed_command('later 1f')
expect('one one one')
feed_command('later 1f')
expect([[
one one one
two
two]])
feed_command('later 1f')
expect([[
one one one
two
two
three]])
end)
end)
it('scripts produce one undo-block for all changes by default', function()
source([[
normal Aaaaa
normal obbbb
normal occcc
]])
expect([[
aaaa
bbbb
cccc]])
feed('u')
expect_empty_buffer()
end)
it("setting 'undolevel' can break undo-blocks (inside scripts)", function()
-- :source is required (because interactive changes are _not_ grouped,
-- even with :undojoin).
source([[
normal Aaaaa
set ul=100
normal obbbb
set ul=100
normal occcc
]])
expect([[
aaaa
bbbb
cccc]])
feed('u')
expect([[
aaaa
bbbb]])
feed('u')
expect('aaaa')
feed('u')
expect_empty_buffer()
end)
it(':undojoin can join undo-blocks inside scripts', function()
feed('Goaaaa<esc>')
feed('obbbb<esc>u')
expect_line('aaaa')
source([[
normal obbbb
set ul=100
undojoin
normal occcc
]])
feed('u')
expect_line('aaaa')
end)
it('undo an expression-register', function()
local normal_commands = 'o1\027a2\018=string(123)\n\027'
write_file(fname .. '.source', normal_commands)
feed('oa<esc>')
feed('ob<esc>')
feed([[o1<esc>a2<C-R>=setline('.','1234')<cr><esc>]])
expect([[
a
b
12034]])
feed('uu')
expect([[
a
b
1]])
feed('oc<esc>')
feed([[o1<esc>a2<C-R>=setline('.','1234')<cr><esc>]])
expect([[
a
b
1
c
12034]])
feed('u')
expect([[
a
b
1
c
12]])
feed('od<esc>')
feed_command('so! ' .. fname .. '.source')
expect([[
a
b
1
c
12
d
12123]])
feed('u')
expect([[
a
b
1
c
12
d]])
-- The above behaviour was tested in the legacy Vim test because the
-- legacy tests were executed with ':so!'. The behavior differs for
-- interactive use (even in Vim; see ":help :undojoin"):
feed(normal_commands)
expect([[
a
b
1
c
12
d
12123]])
feed('u')
expect([[
a
b
1
c
12
d
1]])
end)
end)
|
