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Add v:lua.func() vimL syntax for calling lua

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Also simplify error messages when calling lua from vimL.
This commit is contained in:
Björn Linse
2019-10-30 20:53:09 +01:00
parent 18096631b1
commit dab40f43b1
10 changed files with 442 additions and 217 deletions
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96
test/functional/lua/luaeval_spec.lua
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@@ -1,13 +1,17 @@
-- Test suite for testing luaeval() function
local helpers = require('test.functional.helpers')(after_each)
local Screen = require('test.functional.ui.screen')
local redir_exec = helpers.redir_exec
local pcall_err = helpers.pcall_err
local exc_exec = helpers.exc_exec
local exec_lua = helpers.exec_lua
local command = helpers.command
local meths = helpers.meths
local funcs = helpers.funcs
local clear = helpers.clear
local eval = helpers.eval
local feed = helpers.feed
local NIL = helpers.NIL
local eq = helpers.eq
@@ -186,9 +190,9 @@ describe('luaeval()', function()
exc_exec('call luaeval("{1, foo=2}")'))
eq("Vim(call):E5101: Cannot convert given lua type",
exc_exec('call luaeval("vim.api.nvim_buf_get_lines")'))
startswith("Vim(call):E5107: Error while creating lua chunk for luaeval(): ",
startswith("Vim(call):E5107: Error loading lua [string \"luaeval()\"]:",
exc_exec('call luaeval("1, 2, 3")'))
startswith("Vim(call):E5108: Error while calling lua chunk for luaeval(): ",
startswith("Vim(call):E5108: Error executing lua [string \"luaeval()\"]:",
exc_exec('call luaeval("(nil)()")'))
eq("Vim(call):E5101: Cannot convert given lua type",
exc_exec('call luaeval("{42, vim.api}")'))
@@ -237,19 +241,99 @@ describe('luaeval()', function()
it('errors out correctly when doing incorrect things in lua', function()
-- Conversion errors
eq('Vim(call):E5108: Error while calling lua chunk for luaeval(): [string "<VimL compiled string>"]:1: attempt to call field \'xxx_nonexistent_key_xxx\' (a nil value)',
eq('Vim(call):E5108: Error executing lua [string "luaeval()"]:1: attempt to call field \'xxx_nonexistent_key_xxx\' (a nil value)',
exc_exec([[call luaeval("vim.xxx_nonexistent_key_xxx()")]]))
eq('Vim(call):E5108: Error while calling lua chunk for luaeval(): [string "<VimL compiled string>"]:1: ERROR',
eq('Vim(call):E5108: Error executing lua [string "luaeval()"]:1: ERROR',
exc_exec([[call luaeval("error('ERROR')")]]))
eq('Vim(call):E5108: Error while calling lua chunk for luaeval(): [NULL]',
eq('Vim(call):E5108: Error executing lua [NULL]',
exc_exec([[call luaeval("error(nil)")]]))
end)
it('does not leak memory when called with too long line',
function()
local s = ('x'):rep(65536)
eq('Vim(call):E5107: Error while creating lua chunk for luaeval(): [string "<VimL compiled string>"]:1: unexpected symbol near \')\'',
eq('Vim(call):E5107: Error loading lua [string "luaeval()"]:1: unexpected symbol near \')\'',
exc_exec([[call luaeval("(']] .. s ..[[' + )")]]))
eq(s, funcs.luaeval('"' .. s .. '"'))
end)
end)
describe('v:lua', function()
before_each(function()
exec_lua([[
function _G.foo(a,b,n)
_G.val = n
return a+b
end
mymod = {}
function mymod.noisy(name)
vim.api.nvim_set_current_line("hey "..name)
end
function mymod.crashy()
nonexistent()
end
function mymod.omni(findstart, base)
if findstart == 1 then
return 5
else
if base == 'st' then
return {'stuff', 'steam', 'strange things'}
end
end
end
vim.api.nvim_buf_set_option(0, 'omnifunc', 'v:lua.mymod.omni')
]])
end)
it('works in expressions', function()
eq(7, eval('v:lua.foo(3,4,v:null)'))
eq(true, exec_lua([[return _G.val == vim.NIL]]))
eq(NIL, eval('v:lua.mymod.noisy("eval")'))
eq("hey eval", meths.get_current_line())
eq("Vim:E5108: Error executing lua [string \"<nvim>\"]:10: attempt to call global 'nonexistent' (a nil value)",
pcall_err(eval, 'v:lua.mymod.crashy()'))
end)
it('works in :call', function()
command(":call v:lua.mymod.noisy('command')")
eq("hey command", meths.get_current_line())
eq("Vim(call):E5108: Error executing lua [string \"<nvim>\"]:10: attempt to call global 'nonexistent' (a nil value)",
pcall_err(command, 'call v:lua.mymod.crashy()'))
end)
it('works in func options', function()
local screen = Screen.new(60, 8)
screen:set_default_attr_ids({
[1] = {bold = true, foreground = Screen.colors.Blue1},
[2] = {background = Screen.colors.WebGray},
[3] = {background = Screen.colors.LightMagenta},
[4] = {bold = true},
[5] = {bold = true, foreground = Screen.colors.SeaGreen4},
})
screen:attach()
feed('isome st<c-x><c-o>')
screen:expect{grid=[[
some stuff^ |
{1:~ }{2: stuff }{1: }|
{1:~ }{3: steam }{1: }|
{1:~ }{3: strange things }{1: }|
{1:~ }|
{1:~ }|
{1:~ }|
{4:-- Omni completion (^O^N^P) }{5:match 1 of 3} |
]]}
end)
it('throw errors for invalid use', function()
eq('Vim(let):E15: Invalid expression: v:lua.func', pcall_err(command, "let g:Func = v:lua.func"))
eq('Vim(let):E15: Invalid expression: v:lua', pcall_err(command, "let g:Func = v:lua"))
eq("Vim(let):E15: Invalid expression: v:['lua']", pcall_err(command, "let g:Func = v:['lua']"))
eq("Vim:E15: Invalid expression: v:['lua'].foo()", pcall_err(eval, "v:['lua'].foo()"))
eq("Vim(call):E461: Illegal variable name: v:['lua']", pcall_err(command, "call v:['lua'].baar()"))
eq("Vim(let):E46: Cannot change read-only variable \"v:['lua']\"", pcall_err(command, "let v:['lua'] = 'xx'"))
eq("Vim(let):E46: Cannot change read-only variable \"v:lua\"", pcall_err(command, "let v:lua = 'xx'"))
end)
end)