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-- Specs for
-- - `system()`
-- - `systemlist()`
local helpers = require('test.functional.helpers')
local eq, clear, eval, feed, nvim =
helpers.eq, helpers.clear, helpers.eval, helpers.feed, helpers.nvim
local function create_file_with_nuls(name)
return function()
feed('ipart1<C-V>000part2<C-V>000part3<ESC>:w '..name..'<CR>')
eval('1') -- wait for the file to be created
end
end
local function delete_file(name)
return function()
eval("delete('"..name.."')")
end
end
-- Some tests require the xclip program and a x server.
local xclip = nil
do
if os.getenv('DISPLAY') then
local proc = io.popen('which xclip')
xclip = proc:read()
proc:close()
end
end
describe('system()', function()
before_each(clear)
it('sets the v:shell_error variable', function()
eval([[system("sh -c 'exit'")]])
eq(0, eval('v:shell_error'))
eval([[system("sh -c 'exit 1'")]])
eq(1, eval('v:shell_error'))
eval([[system("sh -c 'exit 5'")]])
eq(5, eval('v:shell_error'))
eval([[system('this-should-not-exist')]])
eq(127, eval('v:shell_error'))
end)
describe('passing no input', function()
it('returns the program output', function()
eq("echoed", eval('system("echo -n echoed")'))
end)
end)
describe('passing input', function()
it('returns the program output', function()
eq("input", eval('system("cat -", "input")'))
end)
end)
describe('passing a lot of input', function()
it('returns the program output', function()
local input = {}
-- write more than 1mb of data, which should be enough to overcome
-- the os buffer limit and force multiple event loop iterations to write
-- everything
for i = 1, 0xffff do
input[#input + 1] = '01234567890ABCDEFabcdef'
end
input = table.concat(input, '\n')
nvim('set_var', 'input', input)
eq(input, eval('system("cat -", g:input)'))
end)
end)
describe('passing number as input', function()
it('stringifies the input', function()
eq('1', eval('system("cat", 1)'))
end)
end)
describe('with output containing NULs', function()
local fname = 'Xtest'
setup(create_file_with_nuls(fname))
teardown(delete_file(fname))
it('replaces NULs by SOH characters', function()
eq('part1\001part2\001part3\n', eval('system("cat '..fname..'")'))
end)
end)
describe('passing list as input', function()
it('joins list items with linefeed characters', function()
eq('line1\nline2\nline3',
eval("system('cat -', ['line1', 'line2', 'line3'])"))
end)
-- Notice that NULs are converted to SOH when the data is read back. This
-- is inconsistent and is a good reason for the existence of the
-- `systemlist()` function, where input and output map to the same
-- characters(see the following tests with `systemlist()` below)
describe('with linefeed characters inside list items', function()
it('converts linefeed characters to NULs', function()
eq('l1\001p2\nline2\001a\001b\nl3',
eval([[system('cat -', ["l1\np2", "line2\na\nb", 'l3'])]]))
end)
end)
describe('with leading/trailing whitespace characters on items', function()
it('preserves whitespace, replacing linefeeds by NULs', function()
eq('line \nline2\001\n\001line3',
eval([[system('cat -', ['line ', "line2\n", "\nline3"])]]))
end)
end)
end)
if xclip then
describe("with a program that doesn't close stdout", function()
it('will exit properly after passing input', function()
eq(nil, eval([[system('xclip -i -selection clipboard', 'clip-data')]]))
eq('clip-data', eval([[system('xclip -o -selection clipboard')]]))
end)
end)
end
end)
describe('systemlist()', function()
-- behavior is similar to `system()` but it returns a list instead of a
-- string.
before_each(clear)
it('sets the v:shell_error variable', function()
eval([[systemlist("sh -c 'exit'")]])
eq(0, eval('v:shell_error'))
eval([[systemlist("sh -c 'exit 1'")]])
eq(1, eval('v:shell_error'))
eval([[systemlist("sh -c 'exit 5'")]])
eq(5, eval('v:shell_error'))
eval([[systemlist('this-should-not-exist')]])
eq(127, eval('v:shell_error'))
end)
describe('passing string with linefeed characters as input', function()
it('splits the output on linefeed characters', function()
eq({'abc', 'def', 'ghi'}, eval([[systemlist("cat -", "abc\ndef\nghi")]]))
end)
end)
describe('passing a lot of input', function()
it('returns the program output', function()
local input = {}
for i = 1, 0xffff do
input[#input + 1] = '01234567890ABCDEFabcdef'
end
nvim('set_var', 'input', input)
eq(input, eval('systemlist("cat -", g:input)'))
end)
end)
describe('with output containing NULs', function()
local fname = 'Xtest'
setup(create_file_with_nuls(fname))
teardown(delete_file(fname))
it('replaces NULs by newline characters', function()
eq({'part1\npart2\npart3'}, eval('systemlist("cat '..fname..'")'))
end)
end)
describe('passing list as input', function()
it('joins list items with linefeed characters', function()
eq({'line1', 'line2', 'line3'},
eval("systemlist('cat -', ['line1', 'line2', 'line3'])"))
end)
-- Unlike `system()` which uses SOH to represent NULs, with `systemlist()`
-- input and ouput are the same
describe('with linefeed characters inside list items', function()
it('converts linefeed characters to NULs', function()
eq({'l1\np2', 'line2\na\nb', 'l3'},
eval([[systemlist('cat -', ["l1\np2", "line2\na\nb", 'l3'])]]))
end)
end)
describe('with leading/trailing whitespace characters on items', function()
it('preserves whitespace, replacing linefeeds by NULs', function()
eq({'line ', 'line2\n', '\nline3'},
eval([[systemlist('cat -', ['line ', "line2\n", "\nline3"])]]))
end)
end)
end)
if xclip then
describe("with a program that doesn't close stdout", function()
it('will exit properly after passing input', function()
eq({}, eval(
"systemlist('xclip -i -selection clipboard', ['clip', 'data'])"))
eq({'clip', 'data'}, eval(
"systemlist('xclip -o -selection clipboard')"))
end)
end)
end
end)
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