"use strict";
const test = require('tape');
global.WEB = false;
const lua = require('../../src/lua.js');
const lauxlib = require('../../src/lauxlib.js');
const lualib = require('../../src/lualib.js');
// TODO: fengari doesn't cache closures yet/ever
test("[test-suite] closure: testing equality", { skip: true }, function (t) {
let luaCode = `
a = {}
for i = 1, 5 do a[i] = function (x) return x + a + _ENV end end
assert(a[3] == a[4] and a[4] == a[5])
for i = 1, 5 do a[i] = function (x) return i + a + _ENV end end
assert(a[3] ~= a[4] and a[4] ~= a[5])
local function f()
return function (x) return math.sin(_ENV[x]) end
end
assert(f() == f())
`, L;
t.plan(2);
t.doesNotThrow(function () {
L = lauxlib.luaL_newstate();
lualib.luaL_openlibs(L);
lauxlib.luaL_loadstring(L, lua.to_luastring(luaCode));
}, "Lua program loaded without error");
t.doesNotThrow(function () {
lua.lua_call(L, 0, -1);
}, "Lua program ran without error");
});
test("[test-suite] closure: testing closures with 'for' control variable", function (t) {
let luaCode = `
a = {}
for i=1,10 do
a[i] = {set = function(x) i=x end, get = function () return i end}
if i == 3 then break end
end
assert(a[4] == nil)
a[1].set(10)
assert(a[2].get() == 2)
a[2].set('a')
assert(a[3].get() == 3)
assert(a[2].get() == 'a')
a = {}
local t = {"a", "b"}
for i = 1, #t do
local k = t[i]
a[i] = {set = function(x, y) i=x; k=y end,
get = function () return i, k end}
if i == 2 then break end
end
a[1].set(10, 20)
local r,s = a[2].get()
assert(r == 2 and s == 'b')
r,s = a[1].get()
assert(r == 10 and s == 20)
a[2].set('a', 'b')
r,s = a[2].get()
assert(r == "a" and s == "b")
`, L;
t.plan(2);
t.doesNotThrow(function () {
L = lauxlib.luaL_newstate();
lualib.luaL_openlibs(L);
lauxlib.luaL_loadstring(L, lua.to_luastring(luaCode));
}, "Lua program loaded without error");
t.doesNotThrow(function () {
lua.lua_call(L, 0, -1);
}, "Lua program ran without error");
});
test("[test-suite] closure: testing closures with 'for' control variable x break", function (t) {
let luaCode = `
local t = {"a", "b"}
for i=1,3 do
f = function () return i end
break
end
assert(f() == 1)
for k = 1, #t do
local v = t[k]
f = function () return k, v end
break
end
assert(({f()})[1] == 1)
assert(({f()})[2] == "a")
`, L;
t.plan(2);
t.doesNotThrow(function () {
L = lauxlib.luaL_newstate();
lualib.luaL_openlibs(L);
lauxlib.luaL_loadstring(L, lua.to_luastring(luaCode));
}, "Lua program loaded without error");
t.doesNotThrow(function () {
lua.lua_call(L, 0, -1);
}, "Lua program ran without error");
});
test("[test-suite] closure: testing closure x break x return x errors", function (t) {
let luaCode = `
local b
function f(x)
local first = 1
while 1 do
if x == 3 and not first then return end
local a = 'xuxu'
b = function (op, y)
if op == 'set' then
a = x+y
else
return a
end
end
if x == 1 then do break end
elseif x == 2 then return
else if x ~= 3 then error() end
end
first = nil
end
end
for i=1,3 do
f(i)
assert(b('get') == 'xuxu')
b('set', 10); assert(b('get') == 10+i)
b = nil
end
pcall(f, 4);
assert(b('get') == 'xuxu')
b('set', 10); assert(b('get') == 14)
`, L;
t.plan(2);
t.doesNotThrow(function () {
L = lauxlib.luaL_newstate();
lualib.luaL_openlibs(L);
lauxlib.luaL_loadstring(L, lua.to_luastring(luaCode));
}, "Lua program loaded without error");
t.doesNotThrow(function () {
lua.lua_call(L, 0, -1);
}, "Lua program ran without error");
});
test("[test-suite] closure: testing multi-level closure", function (t) {
let luaCode = `
local w
function f(x)
return function (y)
return function (z) return w+x+y+z end
end
end
y = f(10)
w = 1.345
assert(y(20)(30) == 60+w)
`, L;
t.plan(2);
t.doesNotThrow(function () {
L = lauxlib.luaL_newstate();
lualib.luaL_openlibs(L);
lauxlib.luaL_loadstring(L, lua.to_luastring(luaCode));
}, "Lua program loaded without error");
t.doesNotThrow(function () {
lua.lua_call(L, 0, -1);
}, "Lua program ran without error");
});
test("[test-suite] closure: testing closures x repeat-until", function (t) {
let luaCode = `
local a = {}
local i = 1
repeat
local x = i
a[i] = function () i = x+1; return x end
until i > 10 or a[i]() ~= x
assert(i == 11 and a[1]() == 1 and a[3]() == 3 and i == 4)
`, L;
t.plan(2);
t.doesNotThrow(function () {
L = lauxlib.luaL_newstate();
lualib.luaL_openlibs(L);
lauxlib.luaL_loadstring(L, lua.to_luastring(luaCode));
}, "Lua program loaded without error");
t.doesNotThrow(function () {
lua.lua_call(L, 0, -1);
}, "Lua program ran without error");
});
test("[test-suite] closure: testing closures created in 'then' and 'else' parts of 'if's", function (t) {
let luaCode = `
a = {}
for i = 1, 10 do
if i % 3 == 0 then
local y = 0
a[i] = function (x) local t = y; y = x; return t end
elseif i % 3 == 1 then
goto L1
error'not here'
::L1::
local y = 1
a[i] = function (x) local t = y; y = x; return t end
elseif i % 3 == 2 then
local t
goto l4
::l4a:: a[i] = t; goto l4b
error("should never be here!")
::l4::
local y = 2
t = function (x) local t = y; y = x; return t end
goto l4a
error("should never be here!")
::l4b::
end
end
for i = 1, 10 do
assert(a[i](i * 10) == i % 3 and a[i]() == i * 10)
end
`, L;
t.plan(2);
t.doesNotThrow(function () {
L = lauxlib.luaL_newstate();
lualib.luaL_openlibs(L);
lauxlib.luaL_loadstring(L, lua.to_luastring(luaCode));
}, "Lua program loaded without error");
t.doesNotThrow(function () {
lua.lua_call(L, 0, -1);
}, "Lua program ran without error");
});
test("[test-suite] closure: test for correctly closing upvalues in tail calls of vararg functions", function (t) {
let luaCode = `
local function t ()
local function c(a,b) assert(a=="test" and b=="OK") end
local function v(f, ...) c("test", f() ~= 1 and "FAILED" or "OK") end
local x = 1
return v(function() return x end)
end
t()
`, L;
t.plan(2);
t.doesNotThrow(function () {
L = lauxlib.luaL_newstate();
lualib.luaL_openlibs(L);
lauxlib.luaL_loadstring(L, lua.to_luastring(luaCode));
}, "Lua program loaded without error");
t.doesNotThrow(function () {
lua.lua_call(L, 0, -1);
}, "Lua program ran without error");
});