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neovim/test/functional/lua/commands_spec.lua
bfredl e61228a214 fix(tests): needing two calls to setup a screen is cringe 
Before calling "attach" a screen object is just a dummy container for
(row, col) values whose purpose is to be sent as part of the "attach"
function call anyway.

Just create the screen in an attached state directly. Keep the complete
(row, col, options) config together. It is still completely valid to
later detach and re-attach as needed, including to another session.
2024-11-14 12:40:57 +01:00

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-- Test suite for checking :lua* commands
local t = require('test.testutil')
local n = require('test.functional.testnvim')()
local Screen = require('test.functional.ui.screen')
local eq = t.eq
local NIL = vim.NIL
local eval = n.eval
local feed = n.feed
local clear = n.clear
local matches = t.matches
local api = n.api
local exec_lua = n.exec_lua
local exec_capture = n.exec_capture
local fn = n.fn
local source = n.source
local dedent = t.dedent
local command = n.command
local exc_exec = n.exc_exec
local pcall_err = t.pcall_err
local write_file = t.write_file
local remove_trace = t.remove_trace
before_each(clear)
describe(':lua', function()
it('works', function()
eq('', exec_capture('lua vim.api.nvim_buf_set_lines(1, 1, 2, false, {"TEST"})'))
eq({ '', 'TEST' }, api.nvim_buf_get_lines(0, 0, 100, false))
source([[
lua << EOF
vim.api.nvim_buf_set_lines(1, 1, 2, false, {"TSET"})
EOF]])
eq({ '', 'TSET' }, api.nvim_buf_get_lines(0, 0, 100, false))
source([[
lua << EOF
vim.api.nvim_buf_set_lines(1, 1, 2, false, {"SETT"})]])
eq({ '', 'SETT' }, api.nvim_buf_get_lines(0, 0, 100, false))
source([[
lua << EOF
vim.api.nvim_buf_set_lines(1, 1, 2, false, {"ETTS"})
vim.api.nvim_buf_set_lines(1, 2, 3, false, {"TTSE"})
vim.api.nvim_buf_set_lines(1, 3, 4, false, {"STTE"})
EOF]])
eq({ '', 'ETTS', 'TTSE', 'STTE' }, api.nvim_buf_get_lines(0, 0, 100, false))
matches(
'.*Vim%(lua%):E15: Invalid expression: .*',
pcall_err(
source,
[[
lua << eval EOF
{}
EOF
]]
)
)
end)
it('throws catchable errors', function()
eq('Vim(lua):E471: Argument required', pcall_err(command, 'lua'))
eq(
[[Vim(lua):E5107: Error loading lua [string ":lua"]:0: unexpected symbol near ')']],
pcall_err(command, 'lua ()')
)
eq(
[[Vim(lua):E5108: Error executing lua [string ":lua"]:1: TEST]],
remove_trace(exc_exec('lua error("TEST")'))
)
eq(
[[Vim(lua):E5108: Error executing lua [string ":lua"]:1: Invalid buffer id: -10]],
remove_trace(exc_exec('lua vim.api.nvim_buf_set_lines(-10, 1, 1, false, {"TEST"})'))
)
eq({ '' }, api.nvim_buf_get_lines(0, 0, 100, false))
end)
it('works with NULL errors', function()
eq([=[Vim(lua):E5108: Error executing lua [NULL]]=], exc_exec('lua error(nil)'))
end)
it('accepts embedded NLs without heredoc', function()
-- Such code is usually used for `:execute 'lua' {generated_string}`:
-- heredocs do not work in this case.
command([[
lua
vim.api.nvim_buf_set_lines(1, 1, 2, false, {"ETTS"})
vim.api.nvim_buf_set_lines(1, 2, 3, false, {"TTSE"})
vim.api.nvim_buf_set_lines(1, 3, 4, false, {"STTE"})
]])
eq({ '', 'ETTS', 'TTSE', 'STTE' }, api.nvim_buf_get_lines(0, 0, 100, false))
end)
it('preserves global and not preserves local variables', function()
eq('', exec_capture('lua gvar = 42'))
eq('', exec_capture('lua local lvar = 100500'))
eq(NIL, fn.luaeval('lvar'))
eq(42, fn.luaeval('gvar'))
end)
it('works with long strings', function()
local s = ('x'):rep(100500)
eq(
'Vim(lua):E5107: Error loading lua [string ":lua"]:0: unfinished string near \'<eof>\'',
pcall_err(command, ('lua vim.api.nvim_buf_set_lines(1, 1, 2, false, {"%s})'):format(s))
)
eq({ '' }, api.nvim_buf_get_lines(0, 0, -1, false))
eq('', exec_capture(('lua vim.api.nvim_buf_set_lines(1, 1, 2, false, {"%s"})'):format(s)))
eq({ '', s }, api.nvim_buf_get_lines(0, 0, -1, false))
end)
it('can show multiline error messages', function()
local screen = Screen.new(40, 10)
screen:set_default_attr_ids({
[1] = { bold = true, foreground = Screen.colors.Blue1 },
[2] = { bold = true, reverse = true },
[3] = { foreground = Screen.colors.Grey100, background = Screen.colors.Red },
[4] = { bold = true, foreground = Screen.colors.SeaGreen4 },
})
feed(':lua error("fail\\nmuch error\\nsuch details")<cr>')
screen:expect {
grid = [[
{2: }|
{3:E5108: Error executing lua [string ":lua}|
{3:"]:1: fail} |
{3:much error} |
{3:such details} |
{3:stack traceback:} |
{3: [C]: in function 'error'} |
{3: [string ":lua"]:1: in main chunk}|
|
{4:Press ENTER or type command to continue}^ |
]],
}
feed('<cr>')
screen:expect {
grid = [[
^ |
{1:~ }|*8
|
]],
}
eq(
'E5108: Error executing lua [string ":lua"]:1: fail\nmuch error\nsuch details',
remove_trace(eval('v:errmsg'))
)
local status, err = pcall(command, 'lua error("some error\\nin a\\nAPI command")')
local expected =
'Vim(lua):E5108: Error executing lua [string ":lua"]:1: some error\nin a\nAPI command'
eq(false, status)
eq(expected, string.sub(remove_trace(err), -string.len(expected)))
feed(':messages<cr>')
screen:expect {
grid = [[
{2: }|
{3:E5108: Error executing lua [string ":lua}|
{3:"]:1: fail} |
{3:much error} |
{3:such details} |
{3:stack traceback:} |
{3: [C]: in function 'error'} |
{3: [string ":lua"]:1: in main chunk}|
|
{4:Press ENTER or type command to continue}^ |
]],
}
end)
it('prints result of =expr', function()
exec_lua('x = 5')
eq('5', exec_capture(':lua =x'))
eq('5', exec_capture('=x'))
exec_lua("function x() return 'hello' end")
eq('hello', exec_capture(':lua = x()'))
exec_lua('x = {a = 1, b = 2}')
eq('{\n a = 1,\n b = 2\n}', exec_capture(':lua =x'))
exec_lua(function()
function _G.x(success)
if success then
return true, 'Return value'
else
return false, nil, 'Error message'
end
end
end)
eq(
dedent [[
true
Return value]],
exec_capture(':lua =x(true)')
)
eq(
dedent [[
false
nil
Error message]],
exec_capture('=x(false)')
)
end)
it('with range', function()
local screen = Screen.new(40, 10)
api.nvim_buf_set_lines(0, 0, 0, 0, { 'nonsense', 'function x() print "hello" end', 'x()' })
-- ":{range}lua" fails on invalid Lua code.
eq(
[[:{range}lua: Vim(lua):E5107: Error loading lua [string ":{range}lua"]:0: '=' expected near '<eof>']],
pcall_err(command, '1lua')
)
-- ":{range}lua" executes valid Lua code.
feed(':2,3lua<CR>')
screen:expect {
grid = [[
nonsense |
function x() print "hello" end |
x() |
^ |
{1:~ }|*5
hello |
]],
attr_ids = {
[1] = { foreground = Screen.colors.Blue, bold = true },
},
}
-- ":{range}lua {code}" executes {code}, ignoring {range}
eq('', exec_capture('1lua gvar = 42'))
eq(42, fn.luaeval('gvar'))
end)
end)
describe(':luado command', function()
it('works', function()
api.nvim_buf_set_lines(0, 0, 1, false, { 'ABC', 'def', 'gHi' })
eq('', exec_capture('luado lines = (lines or {}) lines[#lines + 1] = {linenr, line}'))
eq({ 'ABC', 'def', 'gHi' }, api.nvim_buf_get_lines(0, 0, -1, false))
eq({ { 1, 'ABC' }, { 2, 'def' }, { 3, 'gHi' } }, fn.luaeval('lines'))
-- Automatic transformation of numbers
eq('', exec_capture('luado return linenr'))
eq({ '1', '2', '3' }, api.nvim_buf_get_lines(0, 0, -1, false))
eq('', exec_capture('luado return ("<%02x>"):format(line:byte())'))
eq({ '<31>', '<32>', '<33>' }, api.nvim_buf_get_lines(0, 0, -1, false))
end)
it('stops processing lines when suddenly out of lines', function()
api.nvim_buf_set_lines(0, 0, 1, false, { 'ABC', 'def', 'gHi' })
eq('', exec_capture('2,$luado runs = ((runs or 0) + 1) vim.api.nvim_command("%d")'))
eq({ '' }, api.nvim_buf_get_lines(0, 0, -1, false))
eq(1, fn.luaeval('runs'))
api.nvim_buf_set_lines(0, 0, -1, false, { 'one', 'two', 'three' })
eq('', exec_capture('luado vim.api.nvim_command("%d")'))
eq({ '' }, api.nvim_buf_get_lines(0, 0, -1, false))
api.nvim_buf_set_lines(0, 0, -1, false, { 'one', 'two', 'three' })
eq('', exec_capture('luado vim.api.nvim_command("1,2d")'))
eq({ 'three' }, api.nvim_buf_get_lines(0, 0, -1, false))
api.nvim_buf_set_lines(0, 0, -1, false, { 'one', 'two', 'three' })
eq('', exec_capture('luado vim.api.nvim_command("2,3d"); return "REPLACED"'))
eq({ 'REPLACED' }, api.nvim_buf_get_lines(0, 0, -1, false))
api.nvim_buf_set_lines(0, 0, -1, false, { 'one', 'two', 'three' })
eq('', exec_capture('2,3luado vim.api.nvim_command("1,2d"); return "REPLACED"'))
eq({ 'three' }, api.nvim_buf_get_lines(0, 0, -1, false))
end)
it('fails on errors', function()
eq(
[[Vim(luado):E5109: Error loading lua: [string ":luado"]:0: unexpected symbol near ')']],
pcall_err(command, 'luado ()')
)
eq(
[[Vim(luado):E5111: Error calling lua: [string ":luado"]:0: attempt to perform arithmetic on global 'liness' (a nil value)]],
pcall_err(command, 'luado return liness + 1')
)
end)
it('works with NULL errors', function()
eq([=[Vim(luado):E5111: Error calling lua: [NULL]]=], exc_exec('luado error(nil)'))
end)
it('fails in sandbox when needed', function()
api.nvim_buf_set_lines(0, 0, 1, false, { 'ABC', 'def', 'gHi' })
eq(
'Vim(luado):E48: Not allowed in sandbox: sandbox luado runs = (runs or 0) + 1',
pcall_err(command, 'sandbox luado runs = (runs or 0) + 1')
)
eq(NIL, fn.luaeval('runs'))
end)
it('works with long strings', function()
local s = ('x'):rep(100500)
eq(
'Vim(luado):E5109: Error loading lua: [string ":luado"]:0: unfinished string near \'<eof>\'',
pcall_err(command, ('luado return "%s'):format(s))
)
eq({ '' }, api.nvim_buf_get_lines(0, 0, -1, false))
eq('', exec_capture(('luado return "%s"'):format(s)))
eq({ s }, api.nvim_buf_get_lines(0, 0, -1, false))
end)
end)
describe(':luafile', function()
local fname = 'Xtest-functional-lua-commands-luafile'
after_each(function()
os.remove(fname)
end)
it('works', function()
write_file(
fname,
[[
vim.api.nvim_buf_set_lines(1, 1, 2, false, {"ETTS"})
vim.api.nvim_buf_set_lines(1, 2, 3, false, {"TTSE"})
vim.api.nvim_buf_set_lines(1, 3, 4, false, {"STTE"})
]]
)
eq('', exec_capture('luafile ' .. fname))
eq({ '', 'ETTS', 'TTSE', 'STTE' }, api.nvim_buf_get_lines(0, 0, 100, false))
end)
it('correctly errors out', function()
write_file(fname, '()')
eq(
("Vim(luafile):E5112: Error while creating lua chunk: %s:1: unexpected symbol near ')'"):format(
fname
),
exc_exec('luafile ' .. fname)
)
write_file(fname, 'vimm.api.nvim_buf_set_lines(1, 1, 2, false, {"ETTS"})')
eq(
("Vim(luafile):E5113: Error while calling lua chunk: %s:1: attempt to index global 'vimm' (a nil value)"):format(
fname
),
remove_trace(exc_exec('luafile ' .. fname))
)
end)
it('works with NULL errors', function()
write_file(fname, 'error(nil)')
eq(
[=[Vim(luafile):E5113: Error while calling lua chunk: [NULL]]=],
exc_exec('luafile ' .. fname)
)
end)
end)
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