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vim-patch:8.2.0066: some corners of vim_snprintf() are not tested (#24718)

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Problem:    Some corners of vim_snprintf() are not tested.
Solution:   Add a test in C. (Dominique Pelle, closes vim/vim#5422)

d2c946bacf
This commit is contained in:
zeertzjq
2023-08-15 14:46:05 +08:00
committed by GitHub
parent 6d93bdd458
commit 389165cac1
1 changed files with 36 additions and 0 deletions
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36
test/unit/strings_spec.lua
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@@ -139,6 +139,42 @@ describe('vim_strchr()', function()
end)
end)
describe('vim_snprintf()', function()
itp('truncation', function()
local function check(expected, buf, bsize, fmt, ...)
eq(#expected, strings.vim_snprintf(buf, bsize, fmt, ...))
if bsize > 0 then
local actual = ffi.string(buf, math.min(#expected + 1, bsize))
eq(expected:sub(1, bsize - 1) .. '\0', actual)
end
end
for bsize = 0, 14 do
local buf = ffi.gc(strings.xmalloc(bsize), strings.xfree)
check('1234567', buf, bsize, '%d', ffi.cast('int', 1234567))
check('1234567', buf, bsize, '%ld', ffi.cast('long', 1234567))
check(' 1234567', buf, bsize, '%9ld', ffi.cast('long', 1234567))
check('1234567 ', buf, bsize, '%-9ld', ffi.cast('long', 1234567))
check('deadbeef', buf, bsize, '%x', ffi.cast('unsigned', 0xdeadbeef))
check('001100', buf, bsize, '%06b', ffi.cast('int', 12))
check('1.234000', buf, bsize, '%f', ffi.cast('double', 1.234))
check('1.234000e+00', buf, bsize, '%e', ffi.cast('double', 1.234))
check('nan', buf, bsize, '%f', ffi.cast('double', 0.0 / 0.0))
check('inf', buf, bsize, '%f', ffi.cast('double', 1.0 / 0.0))
check('-inf', buf, bsize, '%f', ffi.cast('double', -1.0 / 0.0))
check('-0.000000', buf, bsize, '%f', ffi.cast('double', -0.0))
check('漢語', buf, bsize, '%s', '漢語')
check(' 漢語', buf, bsize, '%8s', '漢語')
check('漢語 ', buf, bsize, '%-8s', '漢語')
check('漢', buf, bsize, '%.3s', '漢語')
check(' foo', buf, bsize, '%5S', 'foo')
check('%%%', buf, bsize, '%%%%%%')
check('0x87654321', buf, bsize, '%p', ffi.cast('char *', 0x87654321))
check('0x0087654321', buf, bsize, '%012p', ffi.cast('char *', 0x87654321))
end
end)
end)
describe('strcase_save()' , function()
local strcase_save = function(input_string, upper)
local res = strings.strcase_save(to_cstr(input_string), upper)