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patch 8.2.3400: ":z!" is not supported

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Problem:    ":z!" is not supported.
Solution:   Make ":z!" work and add tests. (Dominique Pellé, closes #8836)
            Use display height instead of current window height.
This commit is contained in:
Dominique Pelle
2021-09-04 13:44:01 +02:00
committed by Bram Moolenaar
parent deba5eb195
commit 7f2dd1e90c
5 changed files with 45 additions and 8 deletions
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36
src/testdir/test_ex_z.vim
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@@ -16,8 +16,9 @@ func Test_z()
call assert_equal(23, line('.'))
let a = execute('20z+3')
" FIXME: I would expect the same result as '20z3' but it
" gives "\n21\n22\n23" instead. Bug in Vim or in ":help :z"?
" FIXME: I would expect the same result as '20z3' since 'help z'
" says: Specifying no mark at all is the same as "+".
" However it " gives "\n21\n22\n23" instead. Bug in Vim or in ":help :z"?
"call assert_equal("\n20\n21\n22", a)
"call assert_equal(22, line('.'))
@@ -55,19 +56,48 @@ func Test_z()
call assert_equal(100, line('.'))
let a = execute('20z-1000')
call assert_match("^\n1\n2\n.*\n19\n20$", a)
call assert_equal(20, line('.'))
let a = execute('20z=1000')
call assert_match("^\n1\n.*\n-\\+\n20\n-\\\+\n.*\n100$", a)
call assert_equal(20, line('.'))
" Tests with multiple windows.
5split
call setline(1, range(1, 100))
" Without a count, the number line is window height - 3.
let a = execute('20z')
call assert_equal("\n20\n21", a)
call assert_equal(21, line('.'))
" If window height - 3 is less than 1, it should be clamped to 1.
resize 2
let a = execute('20z')
call assert_equal("\n20", a)
call assert_equal(20, line('.'))
call assert_fails('20z=a', 'E144:')
set window& scroll&
bw!
endfunc
" :z! is the same as :z but count uses the Vim window height when not specified.
func Test_z_bang()
4split
call setline(1, range(1, 20))
let a = execute('10z!')
call assert_equal("\n10\n11\n12\n13\n14\n15\n16\n17\n18\n19\n20", a)
let a = execute('10z!#')
call assert_equal("\n 10 10\n 11 11\n 12 12\n 13 13\n 14 14\n 15 15\n 16 16\n 17 17\n 18 18\n 19 19\n 20 20", a)
let a = execute('10z!3')
call assert_equal("\n10\n11\n12", a)
%bwipe!
endfunc
func Test_z_overflow()
" This used to access invalid memory as a result of an integer overflow
" and freeze vim.