[test-suite] nextvar.js

2 files changed, 1185 insertions, 2 deletions

diff --git a/tests/test-suite/bitwise.js b/tests/test-suite/bitwise.js
index 0b6d533..3969bb0 100644
--- a/tests/test-suite/bitwise.js
+++ b/tests/test-suite/bitwise.js
@@ -191,11 +191,11 @@ test("[test-suite] bitwise: testing bitwise operations", function (t) {
 
     }, "Lua program loaded without error");
 
-    // t.doesNotThrow(function () {
+    t.doesNotThrow(function () {
 
         lua.lua_call(L, 0, -1);
 
-    // }, "Lua program ran without error");
+    }, "Lua program ran without error");
 
 });
 
diff --git a/tests/test-suite/nextvar.js b/tests/test-suite/nextvar.js
new file mode 100644
index 0000000..6cf7c74
--- /dev/null
+++ b/tests/test-suite/nextvar.js
@@ -0,0 +1,1183 @@
+"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');
+
+
+const prefix = `
+    local function checkerror (msg, f, ...)
+      local s, err = pcall(f, ...)
+      assert(not s and string.find(err, msg))
+    end
+`;
+
+test("[test-suite] nextvar: testing size operator", function (t) {
+    let luaCode = `
+        local a = {}
+
+        -- make sure table has lots of space in hash part
+        for i=1,100 do a[i.."+"] = true end
+        for i=1,100 do a[i.."+"] = nil end
+        -- fill hash part with numeric indices testing size operator
+        for i=1,100 do
+          a[i] = true
+          assert(#a == i)
+        end
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: testing ipairs", function (t) {
+    let luaCode = `
+        local x = 0
+        for k,v in ipairs{10,20,30;x=12} do
+          x = x + 1
+          assert(k == x and v == x * 10)
+        end
+
+        for _ in ipairs{x=12, y=24} do assert(nil) end
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: test for 'false' x ipair", function (t) {
+    let luaCode = `
+        x = false
+        local i = 0
+        for k,v in ipairs{true,false,true,false} do
+          i = i + 1
+          x = not x
+          assert(x == v)
+        end
+        assert(i == 4)
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: iterator function is always the same", function (t) {
+    let luaCode = `
+        assert(type(ipairs{}) == 'function' and ipairs{} == ipairs{})
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: JS tests", { skip: true }, function (t) {
+    let luaCode = `
+        -- testing table sizes
+
+        local function log2 (x) return math.log(x, 2) end
+
+        local function mp2 (n)   -- minimum power of 2 >= n
+          local mp = 2^math.ceil(log2(n))
+          assert(n == 0 or (mp/2 < n and n <= mp))
+          return mp
+        end
+
+        local function fb (n)
+          local r, nn = T.int2fb(n)
+          assert(r < 256)
+          return nn
+        end
+
+        -- test fb function
+        for a = 1, 10000 do   -- all numbers up to 10^4
+          local n = fb(a)
+          assert(a <= n and n <= a*1.125)
+        end
+        local a = 1024   -- plus a few up to 2 ^30
+        local lim = 2^30
+        while a < lim do
+          local n = fb(a)
+          assert(a <= n and n <= a*1.125)
+          a = math.ceil(a*1.3)
+        end
+
+         
+        local function check (t, na, nh)
+          local a, h = T.querytab(t)
+          if a ~= na or h ~= nh then
+            print(na, nh, a, h)
+            assert(nil)
+          end
+        end
+
+
+        -- testing C library sizes
+        do
+          local s = 0
+          for _ in pairs(math) do s = s + 1 end
+          check(math, 0, mp2(s))
+        end
+
+
+        -- testing constructor sizes
+        local lim = 40
+        local s = 'return {'
+        for i=1,lim do
+          s = s..i..','
+          local s = s
+          for k=0,lim do 
+            local t = load(s..'}', '')()
+            assert(#t == i)
+            check(t, fb(i), mp2(k))
+            s = string.format('%sa%d=%d,', s, k, k)
+          end
+        end
+
+
+        -- tests with unknown number of elements
+        local a = {}
+        for i=1,lim do a[i] = i end   -- build auxiliary table
+        for k=0,lim do
+          local a = {table.unpack(a,1,k)}
+          assert(#a == k)
+          check(a, k, 0)
+          a = {1,2,3,table.unpack(a,1,k)}
+          check(a, k+3, 0)
+          assert(#a == k + 3)
+        end
+
+
+        -- testing tables dynamically built
+        local lim = 130
+        local a = {}; a[2] = 1; check(a, 0, 1)
+        a = {}; a[0] = 1; check(a, 0, 1); a[2] = 1; check(a, 0, 2)
+        a = {}; a[0] = 1; a[1] = 1; check(a, 1, 1)
+        a = {}
+        for i = 1,lim do
+          a[i] = 1
+          assert(#a == i)
+          check(a, mp2(i), 0)
+        end
+
+        a = {}
+        for i = 1,lim do
+          a['a'..i] = 1
+          assert(#a == 0)
+          check(a, 0, mp2(i))
+        end
+
+        a = {}
+        for i=1,16 do a[i] = i end
+        check(a, 16, 0)
+        do
+          for i=1,11 do a[i] = nil end
+          for i=30,50 do a[i] = nil end   -- force a rehash (?)
+          check(a, 0, 8)   -- only 5 elements in the table
+          a[10] = 1
+          for i=30,50 do a[i] = nil end   -- force a rehash (?)
+          check(a, 0, 8)   -- only 6 elements in the table
+          for i=1,14 do a[i] = nil end
+          for i=18,50 do a[i] = nil end   -- force a rehash (?)
+          check(a, 0, 4)   -- only 2 elements ([15] and [16])
+        end
+
+        -- reverse filling
+        for i=1,lim do
+          local a = {}
+          for i=i,1,-1 do a[i] = i end   -- fill in reverse
+          check(a, mp2(i), 0)
+        end
+
+        -- size tests for vararg
+        lim = 35
+        function foo (n, ...)
+          local arg = {...}
+          check(arg, n, 0)
+          assert(select('#', ...) == n)
+          arg[n+1] = true
+          check(arg, mp2(n+1), 0)
+          arg.x = true
+          check(arg, mp2(n+1), 1)
+        end
+        local a = {}
+        for i=1,lim do a[i] = true; foo(i, table.unpack(a)) end
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: test size operation on empty tables", function (t) {
+    let luaCode = `
+        assert(#{} == 0)
+        assert(#{nil} == 0)
+        assert(#{nil, nil} == 0)
+        assert(#{nil, nil, nil} == 0)
+        assert(#{nil, nil, nil, nil} == 0)
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: test size operation on empty tables", function (t) {
+    let luaCode = `
+        assert(#{} == 0)
+        assert(#{nil} == 0)
+        assert(#{nil, nil} == 0)
+        assert(#{nil, nil, nil} == 0)
+        assert(#{nil, nil, nil, nil} == 0)
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: next uses always the same iteration function", function (t) {
+    let luaCode = `
+        local nofind = {}
+
+        a,b,c = 1,2,3
+        a,b,c = nil
+
+
+        -- next uses always the same iteraction function
+        assert(next{} == next{})
+
+        local function find (name)
+          local n,v
+          while 1 do
+            n,v = next(_G, n)
+            if not n then return nofind end
+            assert(v ~= nil)
+            if n == name then return v end
+          end
+        end
+
+        local function find1 (name)
+          for n,v in pairs(_G) do
+            if n==name then return v end
+          end
+          return nil  -- not found
+        end
+
+
+        assert(print==find("print") and print == find1("print"))
+        assert(_G["print"]==find("print"))
+        assert(assert==find1("assert"))
+        assert(nofind==find("return"))
+        assert(not find1("return"))
+        _G["ret" .. "urn"] = nil
+        assert(nofind==find("return"))
+        _G["xxx"] = 1
+        assert(xxx==find("xxx"))
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: invalid key to 'next'", function (t) {
+    let luaCode = `
+        checkerror("invalid key", next, {10,20}, 3)
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: both 'pairs' and 'ipairs' need an argument", function (t) {
+    let luaCode = `
+        checkerror("bad argument", pairs)
+        checkerror("bad argument", ipairs)
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: fmod table", function (t) {
+    let luaCode = `
+        a = {}
+        for i=0,10000 do
+          if math.fmod(i,10) ~= 0 then
+            a['x'..i] = i
+          end
+        end
+
+        n = {n=0}
+        for i,v in pairs(a) do
+          n.n = n.n+1
+          assert(i and v and a[i] == v)
+        end
+        assert(n.n == 9000)
+        a = nil
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: check next", function (t) {
+    let luaCode = `
+        local function checknext (a)
+          local b = {}
+          do local k,v = next(a); while k do b[k] = v; k,v = next(a,k) end end
+          for k,v in pairs(b) do assert(a[k] == v) end
+          for k,v in pairs(a) do assert(b[k] == v) end
+        end
+
+        checknext{1,x=1,y=2,z=3}
+        checknext{1,2,x=1,y=2,z=3}
+        checknext{1,2,3,x=1,y=2,z=3}
+        checknext{1,2,3,4,x=1,y=2,z=3}
+        checknext{1,2,3,4,5,x=1,y=2,z=3}
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: # operator", function (t) {
+    let luaCode = `
+        assert(#{} == 0)
+        assert(#{[-1] = 2} == 0)
+        assert(#{1,2,3,nil,nil} == 3)
+        for i=0,40 do
+          local a = {}
+          for j=1,i do a[j]=j end
+          assert(#a == i)
+        end
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: maxn", function (t) {
+    let luaCode = `
+        -- 'maxn' is now deprecated, but it is easily defined in Lua
+        function table.maxn (t)
+          local max = 0
+          for k in pairs(t) do
+            max = (type(k) == 'number') and math.max(max, k) or max
+          end
+          return max
+        end
+
+        assert(table.maxn{} == 0)
+        assert(table.maxn{["1000"] = true} == 0)
+        assert(table.maxn{["1000"] = true, [24.5] = 3} == 24.5)
+        assert(table.maxn{[1000] = true} == 1000)
+        assert(table.maxn{[10] = true, [100*math.pi] = print} == 100*math.pi)
+
+        table.maxn = nil
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: int overflow", function (t) {
+    let luaCode = `
+        a = {}
+        for i=0,50 do a[2^i] = true end
+        assert(a[#a])
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: erasing values", function (t) {
+    let luaCode = `
+        local t = {[{1}] = 1, [{2}] = 2, [string.rep("x ", 4)] = 3,
+                   [100.3] = 4, [4] = 5}
+
+        local n = 0
+        for k, v in pairs( t ) do
+          n = n+1
+          assert(t[k] == v)
+          t[k] = nil
+          collectgarbage()
+          assert(t[k] == nil)
+        end
+        assert(n == 5)
+
+
+        local function test (a)
+          assert(not pcall(table.insert, a, 2, 20));
+          table.insert(a, 10); table.insert(a, 2, 20);
+          table.insert(a, 1, -1); table.insert(a, 40);
+          table.insert(a, #a+1, 50)
+          table.insert(a, 2, -2)
+          assert(not pcall(table.insert, a, 0, 20));
+          assert(not pcall(table.insert, a, #a + 2, 20));
+          assert(table.remove(a,1) == -1)
+          assert(table.remove(a,1) == -2)
+          assert(table.remove(a,1) == 10)
+          assert(table.remove(a,1) == 20)
+          assert(table.remove(a,1) == 40)
+          assert(table.remove(a,1) == 50)
+          assert(table.remove(a,1) == nil)
+          assert(table.remove(a) == nil)
+          assert(table.remove(a, #a) == nil)
+        end
+
+        a = {n=0, [-7] = "ban"}
+        test(a)
+        assert(a.n == 0 and a[-7] == "ban")
+
+        a = {[-7] = "ban"};
+        test(a)
+        assert(a.n == nil and #a == 0 and a[-7] == "ban")
+
+        a = {[-1] = "ban"}
+        test(a)
+        assert(#a == 0 and table.remove(a) == nil and a[-1] == "ban")
+
+        a = {[0] = "ban"}
+        assert(#a == 0 and table.remove(a) == "ban" and a[0] == nil)
+
+        table.insert(a, 1, 10); table.insert(a, 1, 20); table.insert(a, 1, -1)
+        assert(table.remove(a) == 10)
+        assert(table.remove(a) == 20)
+        assert(table.remove(a) == -1)
+        assert(table.remove(a) == nil)
+
+        a = {'c', 'd'}
+        table.insert(a, 3, 'a')
+        table.insert(a, 'b')
+        assert(table.remove(a, 1) == 'c')
+        assert(table.remove(a, 1) == 'd')
+        assert(table.remove(a, 1) == 'a')
+        assert(table.remove(a, 1) == 'b')
+        assert(table.remove(a, 1) == nil)
+        assert(#a == 0 and a.n == nil)
+
+        a = {10,20,30,40}
+        assert(table.remove(a, #a + 1) == nil)
+        assert(not pcall(table.remove, a, 0))
+        assert(a[#a] == 40)
+        assert(table.remove(a, #a) == 40)
+        assert(a[#a] == 30)
+        assert(table.remove(a, 2) == 20)
+        assert(a[#a] == 30 and #a == 2)
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: testing table library with metamethods", function (t) {
+    let luaCode = `
+        do
+          local function test (proxy, t)
+            for i = 1, 10 do
+              table.insert(proxy, 1, i)
+            end
+            assert(#proxy == 10 and #t == 10)
+            for i = 1, 10 do
+              assert(t[i] == 11 - i)
+            end
+            table.sort(proxy)
+            for i = 1, 10 do
+              assert(t[i] == i and proxy[i] == i)
+            end
+            assert(table.concat(proxy, ",") == "1,2,3,4,5,6,7,8,9,10")
+            for i = 1, 8 do
+              assert(table.remove(proxy, 1) == i)
+            end
+            assert(#proxy == 2 and #t == 2)
+            local a, b, c = table.unpack(proxy)
+            assert(a == 9 and b == 10 and c == nil)
+          end
+
+          -- all virtual
+          local t = {}
+          local proxy = setmetatable({}, {
+            __len = function () return #t end,
+            __index = t,
+            __newindex = t,
+          })
+          test(proxy, t)
+
+          -- only __newindex
+          local count = 0
+          t = setmetatable({}, {
+            __newindex = function (t,k,v) count = count + 1; rawset(t,k,v) end})
+          test(t, t)
+          assert(count == 10)   -- after first 10, all other sets are not new
+
+          -- no __newindex
+          t = setmetatable({}, {
+            __index = function (_,k) return k + 1 end,
+            __len = function (_) return 5 end})
+          assert(table.concat(t, ";") == "2;3;4;5;6")
+
+        end
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: JS tests", { skip: true }, function (t) {
+    let luaCode = `
+        local tab = {10, 20, 30}
+        local mt = {}
+        local u = T.newuserdata(0)
+        checkerror("table expected", table.insert, u, 40)
+        checkerror("table expected", table.remove, u)
+        debug.setmetatable(u, mt)
+        checkerror("table expected", table.insert, u, 40)
+        checkerror("table expected", table.remove, u)
+        mt.__index = tab
+        checkerror("table expected", table.insert, u, 40)
+        checkerror("table expected", table.remove, u)
+        mt.__newindex = tab
+        checkerror("table expected", table.insert, u, 40)
+        checkerror("table expected", table.remove, u)
+        mt.__len = function () return #tab end
+        table.insert(u, 40)
+        assert(#u == 4 and #tab == 4 and u[4] == 40 and tab[4] == 40)
+        assert(table.remove(u) == 40)
+        table.insert(u, 1, 50)
+        assert(#u == 4 and #tab == 4 and u[4] == 30 and tab[1] == 50)
+
+        mt.__newindex = nil
+        mt.__len = nil
+        local tab2 = {}
+        local u2 = T.newuserdata(0) 
+        debug.setmetatable(u2, {__newindex = function (_, k, v) tab2[k] = v end})
+        table.move(u, 1, 4, 1, u2)
+        assert(#tab2 == 4 and tab2[1] == tab[1] and tab2[4] == tab[4])
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: next", function (t) {
+    let luaCode = `
+        a = {}
+        for i=1,1000 do
+          a[i] = i; a[i-1] = nil
+        end
+        assert(next(a,nil) == 1000 and next(a,1000) == nil)
+
+        assert(next({}) == nil)
+        assert(next({}, nil) == nil)
+
+        for a,b in pairs{} do error"not here" end
+        for i=1,0 do error'not here' end
+        for i=0,1,-1 do error'not here' end
+        a = nil; for i=1,1 do assert(not a); a=1 end; assert(a)
+        a = nil; for i=1,1,-1 do assert(not a); a=1 end; assert(a)
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+// TODO: infinite loop ?
+test("[test-suite] nextvar: testing floats in numeric for", { skip: true }, function (t) {
+    let luaCode = `
+        do
+          local a
+          -- integer count
+          a = 0; for i=1, 1, 1 do a=a+1 end; assert(a==1)
+          a = 0; for i=10000, 1e4, -1 do a=a+1 end; assert(a==1)
+          a = 0; for i=1, 0.99999, 1 do a=a+1 end; assert(a==0)
+          a = 0; for i=9999, 1e4, -1 do a=a+1 end; assert(a==0)
+          a = 0; for i=1, 0.99999, -1 do a=a+1 end; assert(a==1)
+
+          -- float count
+          a = 0; for i=0, 0.999999999, 0.1 do a=a+1 end; assert(a==10)
+          a = 0; for i=1.0, 1, 1 do a=a+1 end; assert(a==1)
+          a = 0; for i=-1.5, -1.5, 1 do a=a+1 end; assert(a==1)
+          a = 0; for i=1e6, 1e6, -1 do a=a+1 end; assert(a==1)
+          a = 0; for i=1.0, 0.99999, 1 do a=a+1 end; assert(a==0)
+          a = 0; for i=99999, 1e5, -1.0 do a=a+1 end; assert(a==0)
+          a = 0; for i=1.0, 0.99999, -1 do a=a+1 end; assert(a==1)
+        end
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: conversion", function (t) {
+    let luaCode = `
+        a = 0; for i="10","1","-2" do a=a+1 end; assert(a==5)
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: checking types", function (t) {
+    let luaCode = `
+        do
+          local c
+          local function checkfloat (i)
+            assert(math.type(i) == "float")
+            c = c + 1
+          end
+
+          c = 0; for i = 1.0, 10 do checkfloat(i) end
+          assert(c == 10)
+
+          c = 0; for i = -1, -10, -1.0 do checkfloat(i) end
+          assert(c == 10)
+
+          local function checkint (i)
+            assert(math.type(i) == "integer")
+            c = c + 1
+          end
+
+          local m = math.maxinteger
+          c = 0; for i = m, m - 10, -1 do checkint(i) end
+          assert(c == 11)
+
+          c = 0; for i = 1, 10.9 do checkint(i) end
+          assert(c == 10)
+
+          c = 0; for i = 10, 0.001, -1 do checkint(i) end
+          assert(c == 10)
+
+          c = 0; for i = 1, "10.8" do checkint(i) end
+          assert(c == 10)
+
+          c = 0; for i = 9, "3.4", -1 do checkint(i) end
+          assert(c == 6)
+
+          c = 0; for i = 0, " -3.4  ", -1 do checkint(i) end
+          assert(c == 4)
+
+          c = 0; for i = 100, "96.3", -2 do checkint(i) end
+          assert(c == 2)
+
+          c = 0; for i = 1, math.huge do if i > 10 then break end; checkint(i) end
+          assert(c == 10)
+
+          c = 0; for i = -1, -math.huge, -1 do
+                   if i < -10 then break end; checkint(i)
+                  end
+          assert(c == 10)
+
+
+          for i = math.mininteger, -10e100 do assert(false) end
+          for i = math.maxinteger, 10e100, -1 do assert(false) end
+
+        end
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: testing generic 'for'", function (t) {
+    let luaCode = `
+        local function f (n, p)
+          local t = {}; for i=1,p do t[i] = i*10 end
+          return function (_,n)
+                   if n > 0 then
+                     n = n-1
+                     return n, table.unpack(t)
+                   end
+                 end, nil, n
+        end
+
+        local x = 0
+        for n,a,b,c,d in f(5,3) do
+          x = x+1
+          assert(a == 10 and b == 20 and c == 30 and d == nil)
+        end
+        assert(x == 5)
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: testing __pairs and __ipairs metamethod", function (t) {
+    let luaCode = `
+        a = {}
+        do
+          local x,y,z = pairs(a)
+          assert(type(x) == 'function' and y == a and z == nil)
+        end
+
+        local function foo (e,i)
+          assert(e == a)
+          if i <= 10 then return i+1, i+2 end
+        end
+
+        local function foo1 (e,i)
+          i = i + 1
+          assert(e == a)
+          if i <= e.n then return i,a[i] end
+        end
+
+        setmetatable(a, {__pairs = function (x) return foo, x, 0 end})
+
+        local i = 0
+        for k,v in pairs(a) do
+          i = i + 1
+          assert(k == i and v == k+1)
+        end
+
+        a.n = 5
+        a[3] = 30
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});
+
+
+test("[test-suite] nextvar: testing ipairs with metamethods", function (t) {
+    let luaCode = `
+        a = {n=10}
+        setmetatable(a, { __index = function (t,k)
+                             if k <= t.n then return k * 10 end 
+                          end})
+        i = 0
+        for k,v in ipairs(a) do
+          i = i + 1
+          assert(k == i and v == i * 10)
+        end
+        assert(i == a.n)
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(prefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
+
+});