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annotate src/testdir/test_recover.vim @ 24844:250c6ab76d19 v8.2.2960

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patch 8.2.2960: swap file recovery not sufficiently tested Commit: https://github.com/vim/vim/commit/8cf02e5cf8fb14a5009f12e7af0a47617a0ce88d Author: Yegappan Lakshmanan <yegappan@yahoo.com> Date: Mon Jun 7 20:41:22 2021 +0200 patch 8.2.2960: swap file recovery not sufficiently tested Problem: Swap file recovery not sufficiently tested. Solution: Add a few more tests. (Yegappan Lakshmanan, closes https://github.com/vim/vim/issues/8339)
author Bram Moolenaar <Bram@vim.org>
date Mon, 07 Jun 2021 20:45:03 +0200
parents e0c43439fea6
children 13812db714fa
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
10896
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1 " Test :recover
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2
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3 source check.vim
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4
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5 func Test_recover_root_dir()
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6 " This used to access invalid memory.
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7 split Xtest
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8 set dir=/
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9 call assert_fails('recover', 'E305:')
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10 close!
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11
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12 if has('win32') || filewritable('/') == 2
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13 " can write in / directory on MS-Windows
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14 set dir=/notexist/
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15 endif
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16 call assert_fails('split Xtest', 'E303:')
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17
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18 " No error with empty 'directory' setting.
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19 set directory=
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20 split XtestOK
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21 close!
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22
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23 set dir&
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24 endfunc
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25
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26 " Make a copy of the current swap file to "Xswap".
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27 " Return the name of the swap file.
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28 func CopySwapfile()
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29 preserve
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30 " get the name of the swap file
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31 let swname = split(execute("swapname"))[0]
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32 let swname = substitute(swname, '[[:blank:][:cntrl:]]*\(.\{-}\)[[:blank:][:cntrl:]]*$', '\1', '')
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33 " make a copy of the swap file in Xswap
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34 set binary
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35 exe 'sp ' . swname
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36 w! Xswap
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37 set nobinary
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38 return swname
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39 endfunc
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40
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41 " Inserts 10000 lines with text to fill the swap file with two levels of pointer
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42 " blocks. Then recovers from the swap file and checks all text is restored.
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43 "
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44 " We need about 10000 lines of 100 characters to get two levels of pointer
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45 " blocks.
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46 func Test_swap_file()
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47 set fileformat=unix undolevels=-1
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48 edit! Xtest
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49 let text = "\tabcdefghijklmnoparstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnoparstuvwxyz0123456789"
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50 let i = 1
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51 let linecount = 10000
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52 while i <= linecount
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53 call append(i - 1, i . text)
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54 let i += 1
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55 endwhile
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56 $delete
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57
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58 let swname = CopySwapfile()
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59
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60 new
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61 only!
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62 bwipe! Xtest
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63 call rename('Xswap', swname)
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64 recover Xtest
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65 call delete(swname)
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66 let linedollar = line('$')
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67 call assert_equal(linecount, linedollar)
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68 if linedollar < linecount
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69 let linecount = linedollar
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70 endif
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71 let i = 1
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72 while i <= linecount
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73 call assert_equal(i . text, getline(i))
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74 let i += 1
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75 endwhile
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76
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77 set undolevels&
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78 enew! | only
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79 endfunc
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80
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81 func Test_nocatch_process_still_running()
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82 " sysinfo.uptime probably only works on Linux
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83 if !has('linux')
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84 let g:skipped_reason = 'only works on Linux'
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85 return
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86 endif
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87 " the GUI dialog can't be handled
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88 if has('gui_running')
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89 let g:skipped_reason = 'only works in the terminal'
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90 return
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91 endif
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92
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93 " don't intercept existing swap file here
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94 au! SwapExists
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95
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96 " Edit a file and grab its swapfile.
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97 edit Xswaptest
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98 call setline(1, ['a', 'b', 'c'])
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99 let swname = CopySwapfile()
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100
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101 " Forget we edited this file
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102 new
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103 only!
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104 bwipe! Xswaptest
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105
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106 call rename('Xswap', swname)
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107 call feedkeys('e', 'tL')
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108 redir => editOutput
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109 edit Xswaptest
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110 redir END
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111 call assert_match('E325: ATTENTION', editOutput)
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112 call assert_match('file name: .*Xswaptest', editOutput)
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113 call assert_match('process ID: \d* (STILL RUNNING)', editOutput)
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114
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115 " Forget we edited this file
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116 new
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117 only!
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118 bwipe! Xswaptest
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119
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120 " pretend we rebooted
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121 call test_override("uptime", 0)
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122 sleep 1
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123
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124 call rename('Xswap', swname)
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125 call feedkeys('e', 'tL')
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126 redir => editOutput
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127 edit Xswaptest
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128 redir END
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129 call assert_match('E325: ATTENTION', editOutput)
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130 call assert_notmatch('(STILL RUNNING)', editOutput)
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131
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132 call test_override("ALL", 0)
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133 call delete(swname)
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134 endfunc
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135
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136 " Test for :recover with multiple swap files
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137 func Test_recover_multiple_swap_files()
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138 CheckUnix
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139 new Xfile1
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140 call setline(1, ['a', 'b', 'c'])
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141 preserve
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142 let b = readblob(swapname(''))
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143 call writefile(b, '.Xfile1.swm')
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144 call writefile(b, '.Xfile1.swn')
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145 call writefile(b, '.Xfile1.swo')
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146 %bw!
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147 call feedkeys(":recover Xfile1\<CR>3\<CR>q", 'xt')
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148 call assert_equal(['a', 'b', 'c'], getline(1, '$'))
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149 " try using out-of-range number to select a swap file
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150 bw!
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151 call feedkeys(":recover Xfile1\<CR>4\<CR>q", 'xt')
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152 call assert_equal('Xfile1', @%)
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153 call assert_equal([''], getline(1, '$'))
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154 bw!
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155 call feedkeys(":recover Xfile1\<CR>0\<CR>q", 'xt')
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156 call assert_equal('Xfile1', @%)
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157 call assert_equal([''], getline(1, '$'))
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158 bw!
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159
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160 call delete('.Xfile1.swm')
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161 call delete('.Xfile1.swn')
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162 call delete('.Xfile1.swo')
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163 endfunc
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164
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165 " Test for :recover using an empty swap file
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166 func Test_recover_empty_swap_file()
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167 CheckUnix
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168 call writefile([], '.Xfile1.swp')
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169 let msg = execute('recover Xfile1')
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170 call assert_match('Unable to read block 0 from .Xfile1.swp', msg)
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171 call assert_equal('Xfile1', @%)
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172 bw!
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173 " :recover from an empty buffer
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174 call assert_fails('recover', 'E305:')
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175 call delete('.Xfile1.swp')
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176 endfunc
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177
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178 " Test for :recover using a corrupted swap file
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179 " Refer to the comments in the memline.c file for the swap file headers
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180 " definition.
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181 func Test_recover_corrupted_swap_file()
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182 CheckUnix
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183
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184 " recover using a partial swap file
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185 call writefile(0z1234, '.Xfile1.swp')
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186 call assert_fails('recover Xfile1', 'E295:')
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187 bw!
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188
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189 " recover using invalid content in the swap file
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190 call writefile([repeat('1', 2*1024)], '.Xfile1.swp')
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191 call assert_fails('recover Xfile1', 'E307:')
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192 call delete('.Xfile1.swp')
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193
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194 " :recover using a swap file with a corrupted header
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195 edit Xfile1
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196 preserve
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197 let sn = swapname('')
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198 let b = readblob(sn)
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199 let save_b = copy(b)
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200 bw!
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201 " Run these tests only on little-endian systems. These tests fail on a
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202 " big-endian system (IBM S390x system).
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203 if b[1008:1011] == 0z33323130
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204 \ && b[4096:4097] == 0z7470
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205 \ && b[8192:8193] == 0z6164
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206
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207 " clear the B0_MAGIC_LONG field
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208 let b[1008:1011] = 0z00000000
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209 call writefile(b, sn)
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210 let msg = execute('recover Xfile1')
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211 call assert_match('the file has been damaged', msg)
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212 call assert_equal('Xfile1', @%)
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213 call assert_equal([''], getline(1, '$'))
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214 bw!
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215
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216 " reduce the page size
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217 let b = copy(save_b)
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218 let b[12:15] = 0z00010000
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219 call writefile(b, sn)
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220 let msg = execute('recover Xfile1')
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221 call assert_match('page size is smaller than minimum value', msg)
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222 call assert_equal('Xfile1', @%)
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223 call assert_equal([''], getline(1, '$'))
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224 bw!
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225
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226 " clear the pointer ID
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227 let b = copy(save_b)
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228 let b[4096:4097] = 0z0000
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229 call writefile(b, sn)
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230 call assert_fails('recover Xfile1', 'E310:')
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231 call assert_equal('Xfile1', @%)
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232 call assert_equal([''], getline(1, '$'))
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233 bw!
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234
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235 " set the number of pointers in a pointer block to zero
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236 let b = copy(save_b)
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237 let b[4098:4099] = 0z0000
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238 call writefile(b, sn)
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239 call assert_fails('recover Xfile1', 'E312:')
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240 call assert_equal('Xfile1', @%)
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241 call assert_equal(['???EMPTY BLOCK'], getline(1, '$'))
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diff changeset
242 bw!
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243
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244 " set the block number in a pointer entry to a negative number
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245 let b = copy(save_b)
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246 let b[4104:4111] = 0z00000000.00000080
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247 call writefile(b, sn)
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248 call assert_fails('recover Xfile1', 'E312:')
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249 call assert_equal('Xfile1', @%)
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250 call assert_equal(['???LINES MISSING'], getline(1, '$'))
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diff changeset
251 bw!
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252
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253 " clear the data block ID
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254 let b = copy(save_b)
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255 let b[8192:8193] = 0z0000
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256 call writefile(b, sn)
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257 call assert_fails('recover Xfile1', 'E312:')
24844
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258 call assert_equal('Xfile1', @%)
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259 call assert_equal(['???BLOCK MISSING'], getline(1, '$'))
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260 bw!
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261
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262 " set the number of lines in the data block to zero
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263 let b = copy(save_b)
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264 let b[8208:8211] = 0z00000000
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265 call writefile(b, sn)
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266 call assert_fails('recover Xfile1', 'E312:')
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267 call assert_equal('Xfile1', @%)
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268 call assert_equal(['??? from here until ???END lines may have been inserted/deleted',
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269 \ '???END'], getline(1, '$'))
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270 bw!
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271
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272 " use an invalid text start for the lines in a data block
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273 let b = copy(save_b)
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274 let b[8216:8219] = 0z00000000
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275 call writefile(b, sn)
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276 call assert_fails('recover Xfile1', 'E312:')
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277 call assert_equal('Xfile1', @%)
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278 call assert_equal(['???'], getline(1, '$'))
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279 bw!
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280
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281 " use an incorrect text end (db_txt_end) for the data block
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282 let b = copy(save_b)
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283 let b[8204:8207] = 0z80000000
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284 call writefile(b, sn)
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285 call assert_fails('recover Xfile1', 'E312:')
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286 call assert_equal('Xfile1', @%)
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287 call assert_equal(['??? from here until ???END lines may be messed up', '',
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288 \ '???END'], getline(1, '$'))
24828
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289 bw!
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290
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291 " remove the data block
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292 let b = copy(save_b)
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293 call writefile(b[:8191], sn)
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294 call assert_fails('recover Xfile1', 'E312:')
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295 call assert_equal('Xfile1', @%)
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296 call assert_equal(['???MANY LINES MISSING'], getline(1, '$'))
24828
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297 endif
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298
24814
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299 bw!
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300 call delete(sn)
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301 endfunc
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302
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303 " Test for :recover using an encrypted swap file
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304 func Test_recover_encrypted_swap_file()
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305 CheckUnix
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306
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307 " Recover an encrypted file from the swap file without the original file
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308 new Xfile1
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309 call feedkeys(":X\<CR>vim\<CR>vim\<CR>", 'xt')
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310 call setline(1, ['aaa', 'bbb', 'ccc'])
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311 preserve
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312 let b = readblob('.Xfile1.swp')
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313 call writefile(b, '.Xfile1.swm')
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314 bw!
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315 call feedkeys(":recover Xfile1\<CR>vim\<CR>\<CR>", 'xt')
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316 call assert_equal(['aaa', 'bbb', 'ccc'], getline(1, '$'))
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317 bw!
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318 call delete('.Xfile1.swm')
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319
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320 " Recover an encrypted file from the swap file with the original file
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321 new Xfile1
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322 call feedkeys(":X\<CR>vim\<CR>vim\<CR>", 'xt')
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323 call setline(1, ['aaa', 'bbb', 'ccc'])
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324 update
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325 call setline(1, ['111', '222', '333'])
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326 preserve
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327 let b = readblob('.Xfile1.swp')
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328 call writefile(b, '.Xfile1.swm')
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329 bw!
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330 call feedkeys(":recover Xfile1\<CR>vim\<CR>\<CR>", 'xt')
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331 call assert_equal(['111', '222', '333'], getline(1, '$'))
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332 call assert_true(&modified)
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333 bw!
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334 call delete('.Xfile1.swm')
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335 call delete('Xfile1')
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336 endfunc
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337
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338 " Test for :recover using a unreadable swap file
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339 func Test_recover_unreadble_swap_file()
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340 CheckUnix
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341 CheckNotRoot
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342 new Xfile1
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343 let b = readblob('.Xfile1.swp')
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344 call writefile(b, '.Xfile1.swm')
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345 bw!
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346 call setfperm('.Xfile1.swm', '-w-------')
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347 call assert_fails('recover Xfile1', 'E306:')
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348 call delete('.Xfile1.swm')
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349 endfunc
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350
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351 " Test for using :recover when the original file and the swap file have the
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352 " same contents.
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353 func Test_recover_unmodified_file()
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354 CheckUnix
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355 call writefile(['aaa', 'bbb', 'ccc'], 'Xfile1')
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356 edit Xfile1
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357 preserve
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358 let b = readblob('.Xfile1.swp')
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359 %bw!
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360 call writefile(b, '.Xfile1.swz')
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361 let msg = execute('recover Xfile1')
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362 call assert_equal(['aaa', 'bbb', 'ccc'], getline(1, '$'))
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363 call assert_false(&modified)
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364 call assert_match('Buffer contents equals file contents', msg)
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365 bw!
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366 call delete('Xfile1')
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367 call delete('.Xfile1.swz')
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368 endfunc
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369
24844
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370 " Test for recovering a file when editing a symbolically linked file
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diff changeset
371 func Test_recover_symbolic_link()
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372 CheckUnix
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373 call writefile(['aaa', 'bbb', 'ccc'], 'Xfile1')
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374 silent !ln -s Xfile1 Xfile2
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375 edit Xfile2
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376 call assert_equal('.Xfile1.swp', fnamemodify(swapname(''), ':t'))
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diff changeset
377 preserve
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378 let b = readblob('.Xfile1.swp')
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379 %bw!
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380 call writefile([], 'Xfile1')
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381 call writefile(b, '.Xfile1.swp')
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382 silent! recover Xfile2
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383 call assert_equal(['aaa', 'bbb', 'ccc'], getline(1, '$'))
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384 call assert_true(&modified)
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diff changeset
385 update
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diff changeset
386 %bw!
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diff changeset
387 call assert_equal(['aaa', 'bbb', 'ccc'], readfile('Xfile1'))
250c6ab76d19 patch 8.2.2960: swap file recovery not sufficiently tested
Bram Moolenaar <Bram@vim.org>
parents: 24828
diff changeset
388 call delete('Xfile1')
250c6ab76d19 patch 8.2.2960: swap file recovery not sufficiently tested
Bram Moolenaar <Bram@vim.org>
parents: 24828
diff changeset
389 call delete('Xfile2')
250c6ab76d19 patch 8.2.2960: swap file recovery not sufficiently tested
Bram Moolenaar <Bram@vim.org>
parents: 24828
diff changeset
390 call delete('.Xfile1.swp')
250c6ab76d19 patch 8.2.2960: swap file recovery not sufficiently tested
Bram Moolenaar <Bram@vim.org>
parents: 24828
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391 endfunc
250c6ab76d19 patch 8.2.2960: swap file recovery not sufficiently tested
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parents: 24828
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392
21765
08940efa6b4e patch 8.2.1432: various inconsistencies in test files
Bram Moolenaar <Bram@vim.org>
parents: 18372
diff changeset
393 " vim: shiftwidth=2 sts=2 expandtab