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runtime(syntax-tests): Allow for folded and wrapped lines in syntax test files

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The current implementation falls short for syntax test files
on two accounts:
1. With folded lines -- some lines before folded lines are
    unnecessarily repeated in generated dump files because
    closed folded lines are always treated as opened for the
    cursor to move _in_ instead of to move _over_ them.
2. With wrapped lines (longer than 75 columns) -- some lines
    are omitted in generated dump files because calculations
    for the cursor progress and its movement commands only
    refer to file lines and not their layout within a 20x75
    buffer (less &cmdheight).

As an alternative, we abandon deterministic (and inaccurate
at times) calculations for the cursor progress and, instead,
advance the cursor by as much as before for a single dump
file, but now rely on marking the last visible line and
additional movement to position lines at desired offsets,
carefully preserving compatibility for the &scrolloff and
&ruler values inherited from defaults.vim.  The parent Vim
process will keep track of progress through a syntax test
file made by its child process ("terminal") by reading the
rightmost end of the ruler line from the terminal buffer,
looking for " All " or " Bot " for its cue to finish dump
file generation.

With these changes applied, the lossless line length limit
will be raised from 75 to 1425 (for a 19x75 view) columns.

Also, prefer "lastline" to "truncate" for &display; hiding
the content of any last _long_ line in a view goes against
the purpose of syntax file testing -- all lines should be
recorded.

related: #15150
fixes: #14245

Signed-off-by: Aliaksei Budavei <0x000c70@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Aliaksei Budavei
2024-05-21 01:10:26 +03:00
committed by Christian Brabandt
parent f397549332
commit 8418446644
146 changed files with 1505 additions and 904 deletions
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6
runtime/syntax/testdir/README.txt
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@ -27,12 +27,12 @@ Creating a syntax plugin test
Create a source file in the language you want to test in the "input"
directory. Use the filetype name as the base and a file name extension
matching the filetype. Let's use Java as an example. The file would then be
matching the filetype. Let's use Java as an example. The file would then be
"input/java.java".
Make sure to include some interesting constructs with plenty of complicated
highlighting. Optionally, pre-configure the testing environment by including
setup commands at the top of the input file. The format for these lines is:
setup commands at the top of the input file. The format for these lines is:
VIM_TEST_SETUP {command}
@ -61,6 +61,8 @@ an "input/setup/java.vim" script file with the following lines:
Both inline setup commands and setup scripts may be used at the same time, the
script file will be sourced before any VIM_TEST_SETUP commands are executed.
Every line of a source file must not be longer than 1425 (19 x 75) characters.
If there is no further setup required, you can now run the tests:
make test