Mercurial > vim
annotate runtime/doc/testing.txt @ 27895:38651469e776 v8.2.4473
patch 8.2.4473: Coverity warnds for not checking return value of ftell()
Commit: https://github.com/vim/vim/commit/416b5f4894196947ea87eea2ed4fda3504674f72
Author: Bram Moolenaar <Bram@vim.org>
Date: Fri Feb 25 21:47:48 2022 +0000
patch 8.2.4473: Coverity warnds for not checking return value of ftell()
Problem: Coverity warnds for not checking return value of ftell().
Solution: Bail out if ftell() returns a negative value.
author | Bram Moolenaar <Bram@vim.org> |
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date | Fri, 25 Feb 2022 23:00:03 +0100 |
parents | 9fe2fed9bb4b |
children | 4190b932e6ca |
rev | line source |
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1 *testing.txt* For Vim version 8.2. Last change: 2022 Feb 10 |
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2 |
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3 |
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4 VIM REFERENCE MANUAL by Bram Moolenaar |
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5 |
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6 |
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7 Testing Vim and Vim script *testing-support* |
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8 |
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9 Expression evaluation is explained in |eval.txt|. This file goes into details |
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10 about writing tests in Vim script. This can be used for testing Vim itself |
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11 and for testing plugins. |
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12 |
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13 1. Testing Vim |testing| |
17571 | 14 2. Test functions |test-functions-details| |
15 3. Assert functions |assert-functions-details| | |
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16 |
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17 ============================================================================== |
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18 1. Testing Vim *testing* |
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19 |
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20 Vim can be tested after building it, usually with "make test". |
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21 The tests are located in the directory "src/testdir". |
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22 |
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23 There are two types of tests added over time: |
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24 test20.in oldest, only for tiny and small builds |
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25 test_something.vim new style tests |
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26 |
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27 *new-style-testing* |
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28 New tests should be added as new style tests. The test scripts are named |
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29 test_<feature>.vim (replace <feature> with the feature under test). These use |
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30 functions such as |assert_equal()| to keep the test commands and the expected |
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31 result in one place. |
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32 *old-style-testing* |
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33 These tests are used only for testing Vim without the |+eval| feature. |
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34 |
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35 Find more information in the file src/testdir/README.txt. |
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36 |
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37 ============================================================================== |
17571 | 38 2. Test functions *test-functions-details* |
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39 |
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40 test_alloc_fail({id}, {countdown}, {repeat}) *test_alloc_fail()* |
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41 This is for testing: If the memory allocation with {id} is |
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42 called, then decrement {countdown}, and when it reaches zero |
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43 let memory allocation fail {repeat} times. When {repeat} is |
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44 smaller than one it fails one time. |
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45 |
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46 Can also be used as a |method|: > |
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47 GetAllocId()->test_alloc_fail() |
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48 |
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50 test_autochdir() *test_autochdir()* |
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51 Set a flag to enable the effect of 'autochdir' before Vim |
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52 startup has finished. |
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53 |
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54 |
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55 test_feedinput({string}) *test_feedinput()* |
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56 Characters in {string} are queued for processing as if they |
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57 were typed by the user. This uses a low level input buffer. |
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58 This function works only when with |+unix| or GUI is running. |
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59 |
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60 Can also be used as a |method|: > |
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61 GetText()->test_feedinput() |
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62 |
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64 test_garbagecollect_now() *test_garbagecollect_now()* |
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65 Like garbagecollect(), but executed right away. This must |
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66 only be called directly to avoid any structure to exist |
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67 internally, and |v:testing| must have been set before calling |
27537 | 68 any function. *E1142* |
69 This will not work when called from a :def function, because | |
70 variables on the stack will be freed. | |
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71 |
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72 |
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73 test_garbagecollect_soon() *test_garbagecollect_soon()* |
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74 Set the flag to call the garbagecollector as if in the main |
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75 loop. Only to be used in tests. |
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76 |
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77 |
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78 test_getvalue({name}) *test_getvalue()* |
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79 Get the value of an internal variable. These values for |
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80 {name} are supported: |
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81 need_fileinfo |
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82 |
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83 Can also be used as a |method|: > |
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84 GetName()->test_getvalue() |
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85 < |
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86 *test_gui_event()* |
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87 test_gui_event({event}, {args}) |
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88 Generate a GUI {event} with arguments {args} for testing Vim |
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89 functionality. This function works only when the GUI is |
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90 running. |
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91 |
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92 {event} is a String and the supported values are: |
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93 "dropfiles" drop one or more files in a window. |
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94 "findrepl" search and replace text |
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95 "mouse" mouse button click event. |
27537 | 96 "scrollbar" move or drag the scrollbar |
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97 "tabline" select a tab page by mouse click. |
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98 "tabmenu" select a tabline menu entry. |
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99 |
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100 {args} is a Dict and contains the arguments for the event. |
25973 | 101 |
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102 "dropfiles": |
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103 Drop one or more files in a specified window. The supported |
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104 items in {args} are: |
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105 files: List of file names |
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106 row: window row number |
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107 col: window column number |
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108 modifiers: key modifiers. The supported values are: |
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109 0x4 Shift |
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110 0x8 Alt |
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111 0x10 Ctrl |
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112 The files are added to the |argument-list| and the first |
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113 file in {files} is edited in the window. See |drag-n-drop| |
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114 for more information. This event works only when the |
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115 |drop_file| feature is present. |
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116 |
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117 "findrepl": |
27537 | 118 {only available when the GUI has a find/replace dialog} |
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119 Perform a search and replace of text. The supported items |
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120 in {args} are: |
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121 find_text: string to find. |
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122 repl_text: replacement string |
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123 flags: flags controlling the find/replace. Supported |
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124 values are: |
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125 1 search next string (find dialog) |
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126 2 search next string (replace dialog) |
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127 3 replace string once |
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128 4 replace all matches |
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129 8 match whole words only |
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130 16 match case |
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131 forward: set to 1 for forward search. |
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132 |
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133 "mouse": |
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134 Inject a mouse button click event. The supported items in |
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135 {args} are: |
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136 button: mouse button. The supported values are: |
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137 0 right mouse button |
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138 1 middle mouse button |
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139 2 left mouse button |
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140 3 mouse button release |
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141 4 scroll wheel down |
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142 5 scroll wheel up |
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143 6 scroll wheel left |
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144 7 scroll wheel right |
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145 row: mouse click row number. The first row of the |
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146 Vim window is 1 and the last row is 'lines'. |
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147 col: mouse click column number. The maximum value |
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148 of {col} is 'columns'. |
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149 multiclick: set to 1 to inject a multiclick mouse event. |
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150 modifiers: key modifiers. The supported values are: |
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151 4 shift is pressed |
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152 8 alt is pressed |
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153 16 ctrl is pressed |
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154 |
27537 | 155 "scrollbar": |
156 Set or drag the left, right or horizontal scrollbar. Only | |
157 works when the scrollbar actually exists. The supported | |
158 items in {args} are: | |
159 which: scrollbar. The supported values are: | |
160 left Left scrollbar of the current window | |
161 right Right scrollbar of the current window | |
162 hor Horizontal scrollbar | |
163 value: amount to scroll. For the vertical scrollbars | |
164 the value can be 1 to the line-count of the | |
165 buffer. For the horizontal scrollbar the | |
166 value can be between 1 and the maximum line | |
167 length, assuming 'wrap' is not set. | |
168 dragging: 1 to drag the scrollbar and 0 to click in the | |
169 scrollbar. | |
170 | |
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171 "tabline": |
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172 Inject a mouse click event on the tabline to select a |
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173 tabpage. The supported items in {args} are: |
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174 tabnr: tab page number |
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175 |
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176 "tabmenu": |
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177 Inject an event to select a tabline menu entry. The |
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178 supported items in {args} are: |
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179 tabnr: tab page number |
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180 item: tab page menu item number. 1 for the first |
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181 menu item, 2 for the second item and so on. |
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182 |
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183 After injecting the GUI events you probably should call |
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184 |feedkeys()| to have them processed, e.g.: > |
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185 call feedkeys("y", 'Lx!') |
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186 < |
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187 Returns TRUE if the event is successfully added, FALSE if |
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188 there is a failure. |
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189 |
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190 Can also be used as a |method|: > |
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191 GetEvent()->test_gui_event({args}) |
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192 < |
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193 test_ignore_error({expr}) *test_ignore_error()* |
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194 Ignore any error containing {expr}. A normal message is given |
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195 instead. |
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196 This is only meant to be used in tests, where catching the |
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197 error with try/catch cannot be used (because it skips over |
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198 following code). |
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199 {expr} is used literally, not as a pattern. |
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200 When the {expr} is the string "RESET" then the list of ignored |
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201 errors is made empty. |
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202 |
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203 Can also be used as a |method|: > |
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204 GetErrorText()->test_ignore_error() |
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205 |
25700 | 206 |
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207 test_null_blob() *test_null_blob()* |
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208 Return a |Blob| that is null. Only useful for testing. |
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209 |
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210 |
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211 test_null_channel() *test_null_channel()* |
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212 Return a |Channel| that is null. Only useful for testing. |
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213 {only available when compiled with the +channel feature} |
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214 |
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215 |
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216 test_null_dict() *test_null_dict()* |
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217 Return a |Dict| that is null. Only useful for testing. |
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218 |
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219 |
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220 test_null_function() *test_null_function()* |
19968 | 221 Return a |Funcref| that is null. Only useful for testing. |
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222 |
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223 |
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224 test_null_job() *test_null_job()* |
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225 Return a |Job| that is null. Only useful for testing. |
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226 {only available when compiled with the +job feature} |
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227 |
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228 |
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229 test_null_list() *test_null_list()* |
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230 Return a |List| that is null. Only useful for testing. |
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231 |
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232 |
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233 test_null_partial() *test_null_partial()* |
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234 Return a |Partial| that is null. Only useful for testing. |
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235 |
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236 |
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237 test_null_string() *test_null_string()* |
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238 Return a |String| that is null. Only useful for testing. |
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239 |
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240 |
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241 test_option_not_set({name}) *test_option_not_set()* |
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242 Reset the flag that indicates option {name} was set. Thus it |
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243 looks like it still has the default value. Use like this: > |
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244 set ambiwidth=double |
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245 call test_option_not_set('ambiwidth') |
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246 < Now the 'ambiwidth' option behaves like it was never changed, |
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247 even though the value is "double". |
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248 Only to be used for testing! |
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249 |
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250 Can also be used as a |method|: > |
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251 GetOptionName()->test_option_not_set() |
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252 |
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253 |
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254 test_override({name}, {val}) *test_override()* |
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255 Overrides certain parts of Vim's internal processing to be able |
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256 to run tests. Only to be used for testing Vim! |
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257 The override is enabled when {val} is non-zero and removed |
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258 when {val} is zero. |
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259 Current supported values for {name} are: |
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260 |
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261 {name} effect when {val} is non-zero ~ |
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262 autoload `import autoload` will load the script right |
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263 away, not postponed until an item is used |
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264 char_avail disable the char_avail() function |
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265 nfa_fail makes the NFA regexp engine fail to force a |
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266 fallback to the old engine |
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267 no_query_mouse do not query the mouse position for "dec" |
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268 terminals |
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269 no_wait_return set the "no_wait_return" flag. Not restored |
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270 with "ALL". |
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271 redraw disable the redrawing() function |
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272 redraw_flag ignore the RedrawingDisabled flag |
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273 starting reset the "starting" variable, see below |
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274 term_props reset all terminal properties when the version |
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275 string is detected |
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276 ui_delay time in msec to use in ui_delay(); overrules a |
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277 wait time of up to 3 seconds for messages |
24103 | 278 uptime overrules sysinfo.uptime |
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279 vterm_title setting the window title by a job running in a |
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280 terminal window |
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281 ALL clear all overrides ({val} is not used) |
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282 |
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283 "starting" is to be used when a test should behave like |
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284 startup was done. Since the tests are run by sourcing a |
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285 script the "starting" variable is non-zero. This is usually a |
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286 good thing (tests run faster), but sometimes changes behavior |
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287 in a way that the test doesn't work properly. |
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288 When using: > |
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289 call test_override('starting', 1) |
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290 < The value of "starting" is saved. It is restored by: > |
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291 call test_override('starting', 0) |
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292 |
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293 < Can also be used as a |method|: > |
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294 GetOverrideVal()-> test_override('starting') |
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295 |
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297 test_refcount({expr}) *test_refcount()* |
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298 Return the reference count of {expr}. When {expr} is of a |
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299 type that does not have a reference count, returns -1. Only |
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300 to be used for testing. |
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301 |
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302 Can also be used as a |method|: > |
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303 GetVarname()->test_refcount() |
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304 |
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305 |
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306 test_setmouse({row}, {col}) *test_setmouse()* |
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307 Set the mouse position to be used for the next mouse action. |
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308 {row} and {col} are one based. |
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309 For example: > |
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310 call test_setmouse(4, 20) |
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311 call feedkeys("\<LeftMouse>", "xt") |
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312 |
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314 test_settime({expr}) *test_settime()* |
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315 Set the time Vim uses internally. Currently only used for |
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316 timestamps in the history, as they are used in viminfo, and |
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317 for undo. |
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318 Using a value of 1 makes Vim not sleep after a warning or |
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319 error message. |
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320 {expr} must evaluate to a number. When the value is zero the |
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321 normal behavior is restored. |
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322 |
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323 Can also be used as a |method|: > |
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324 GetTime()->test_settime() |
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325 |
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327 test_srand_seed([seed]) *test_srand_seed()* |
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328 When [seed] is given this sets the seed value used by |
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329 `srand()`. When omitted the test seed is removed. |
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330 |
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332 test_unknown() *test_unknown()* | |
333 Return a value with unknown type. Only useful for testing. | |
334 | |
335 | |
336 test_void() *test_void()* | |
337 Return a value with void type. Only useful for testing. | |
338 | |
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339 ============================================================================== |
17571 | 340 3. Assert functions *assert-functions-details* |
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341 |
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342 |
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343 assert_beeps({cmd}) *assert_beeps()* |
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344 Run {cmd} and add an error message to |v:errors| if it does |
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345 NOT produce a beep or visual bell. |
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346 Also see |assert_fails()|, |assert_nobeep()| and |
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347 |assert-return|. |
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348 |
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349 Can also be used as a |method|: > |
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350 GetCmd()->assert_beeps() |
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351 < |
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352 *assert_equal()* |
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353 assert_equal({expected}, {actual} [, {msg}]) |
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354 When {expected} and {actual} are not equal an error message is |
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355 added to |v:errors| and 1 is returned. Otherwise zero is |
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356 returned |assert-return|. |
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357 There is no automatic conversion, the String "4" is different |
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358 from the Number 4. And the number 4 is different from the |
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359 Float 4.0. The value of 'ignorecase' is not used here, case |
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360 always matters. |
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361 When {msg} is omitted an error in the form "Expected |
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362 {expected} but got {actual}" is produced. |
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363 Example: > |
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364 assert_equal('foo', 'bar') |
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365 < Will result in a string to be added to |v:errors|: |
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366 test.vim line 12: Expected 'foo' but got 'bar' ~ |
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367 |
21250 | 368 Can also be used as a |method|, the base is passed as the |
369 second argument: > | |
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370 mylist->assert_equal([1, 2, 3]) |
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371 |
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372 < *assert_equalfile()* |
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373 assert_equalfile({fname-one}, {fname-two} [, {msg}]) |
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374 When the files {fname-one} and {fname-two} do not contain |
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375 exactly the same text an error message is added to |v:errors|. |
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376 Also see |assert-return|. |
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377 When {fname-one} or {fname-two} does not exist the error will |
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378 mention that. |
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379 Mainly useful with |terminal-diff|. |
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380 |
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381 Can also be used as a |method|: > |
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382 GetLog()->assert_equalfile('expected.log') |
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383 |
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384 assert_exception({error} [, {msg}]) *assert_exception()* |
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385 When v:exception does not contain the string {error} an error |
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386 message is added to |v:errors|. Also see |assert-return|. |
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387 This can be used to assert that a command throws an exception. |
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388 Using the error number, followed by a colon, avoids problems |
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389 with translations: > |
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390 try |
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391 commandthatfails |
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392 call assert_false(1, 'command should have failed') |
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393 catch |
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394 call assert_exception('E492:') |
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395 endtry |
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396 < |
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397 *assert_fails()* |
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398 assert_fails({cmd} [, {error} [, {msg} [, {lnum} [, {context}]]]]) |
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399 Run {cmd} and add an error message to |v:errors| if it does |
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400 NOT produce an error or when {error} is not found in the |
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401 error message. Also see |assert-return|. |
27321 | 402 *E856* |
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403 When {error} is a string it must be found literally in the |
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404 first reported error. Most often this will be the error code, |
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405 including the colon, e.g. "E123:". > |
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406 assert_fails('bad cmd', 'E987:') |
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407 < |
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408 When {error} is a |List| with one or two strings, these are |
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409 used as patterns. The first pattern is matched against the |
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410 first reported error: > |
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411 assert_fails('cmd', ['E987:.*expected bool']) |
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412 < The second pattern, if present, is matched against the last |
23305 | 413 reported error. |
414 If there is only one error then both patterns must match. This | |
415 can be used to check that there is only one error. | |
416 To only match the last error use an empty string for the first | |
417 error: > | |
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418 assert_fails('cmd', ['', 'E987:']) |
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419 < |
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420 If {msg} is empty then it is not used. Do this to get the |
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421 default message when passing the {lnum} argument. |
27459 | 422 *E1115* |
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423 When {lnum} is present and not negative, and the {error} |
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424 argument is present and matches, then this is compared with |
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425 the line number at which the error was reported. That can be |
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426 the line number in a function or in a script. |
27459 | 427 *E1116* |
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428 When {context} is present it is used as a pattern and matched |
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429 against the context (script name or function name) where |
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430 {lnum} is located in. |
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431 |
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432 Note that beeping is not considered an error, and some failing |
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433 commands only beep. Use |assert_beeps()| for those. |
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434 |
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435 Can also be used as a |method|: > |
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436 GetCmd()->assert_fails('E99:') |
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437 |
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438 assert_false({actual} [, {msg}]) *assert_false()* |
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439 When {actual} is not false an error message is added to |
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440 |v:errors|, like with |assert_equal()|. |
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441 Also see |assert-return|. |
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442 A value is false when it is zero. When {actual} is not a |
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443 number the assert fails. |
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444 When {msg} is omitted an error in the form |
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445 "Expected False but got {actual}" is produced. |
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446 |
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447 Can also be used as a |method|: > |
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448 GetResult()->assert_false() |
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449 |
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450 assert_inrange({lower}, {upper}, {actual} [, {msg}]) *assert_inrange()* |
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451 This asserts number and |Float| values. When {actual} is lower |
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452 than {lower} or higher than {upper} an error message is added |
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453 to |v:errors|. Also see |assert-return|. |
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454 When {msg} is omitted an error in the form |
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455 "Expected range {lower} - {upper}, but got {actual}" is |
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456 produced. |
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457 |
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458 *assert_match()* |
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459 assert_match({pattern}, {actual} [, {msg}]) |
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460 When {pattern} does not match {actual} an error message is |
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461 added to |v:errors|. Also see |assert-return|. |
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462 |
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463 {pattern} is used as with |=~|: The matching is always done |
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464 like 'magic' was set and 'cpoptions' is empty, no matter what |
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465 the actual value of 'magic' or 'cpoptions' is. |
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466 |
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467 {actual} is used as a string, automatic conversion applies. |
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468 Use "^" and "$" to match with the start and end of the text. |
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469 Use both to match the whole text. |
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470 |
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471 When {msg} is omitted an error in the form |
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472 "Pattern {pattern} does not match {actual}" is produced. |
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473 Example: > |
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474 assert_match('^f.*o$', 'foobar') |
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475 < Will result in a string to be added to |v:errors|: |
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476 test.vim line 12: Pattern '^f.*o$' does not match 'foobar' ~ |
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477 |
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478 Can also be used as a |method|: > |
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479 getFile()->assert_match('foo.*') |
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480 < |
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481 assert_nobeep({cmd}) *assert_nobeep()* |
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482 Run {cmd} and add an error message to |v:errors| if it |
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483 produces a beep or visual bell. |
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484 Also see |assert_beeps()|. |
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485 |
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486 Can also be used as a |method|: > |
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487 GetCmd()->assert_nobeep() |
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488 < |
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489 *assert_notequal()* |
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490 assert_notequal({expected}, {actual} [, {msg}]) |
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491 The opposite of `assert_equal()`: add an error message to |
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492 |v:errors| when {expected} and {actual} are equal. |
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493 Also see |assert-return|. |
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494 |
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495 Can also be used as a |method|: > |
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496 mylist->assert_notequal([1, 2, 3]) |
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497 |
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498 < *assert_notmatch()* |
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499 assert_notmatch({pattern}, {actual} [, {msg}]) |
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500 The opposite of `assert_match()`: add an error message to |
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501 |v:errors| when {pattern} matches {actual}. |
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502 Also see |assert-return|. |
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503 |
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504 Can also be used as a |method|: > |
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505 getFile()->assert_notmatch('bar.*') |
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506 |
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507 |
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508 assert_report({msg}) *assert_report()* |
25619 | 509 Report a test failure directly, using String {msg}. |
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510 Always returns one. |
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511 |
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512 Can also be used as a |method|: > |
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513 GetMessage()->assert_report() |
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514 |
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515 |
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516 assert_true({actual} [, {msg}]) *assert_true()* |
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517 When {actual} is not true an error message is added to |
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518 |v:errors|, like with |assert_equal()|. |
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519 Also see |assert-return|. |
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520 A value is TRUE when it is a non-zero number. When {actual} |
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521 is not a number the assert fails. |
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522 When {msg} is omitted an error in the form "Expected True but |
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523 got {actual}" is produced. |
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524 |
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525 Can also be used as a |method|: > |
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526 GetResult()->assert_true() |
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527 < |
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528 |
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529 vim:tw=78:ts=8:noet:ft=help:norl: |