From d738c8d18bcc5651109b3a46103d6aa983772e68 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Wed, 7 Dec 2022 15:12:52 -0300
Subject: New function 'luaL_openselectedlibs'

Makes it easier to start Lua with only some standard libraries.
---
 testes/api.lua       | 14 ++++++++------
 testes/coroutine.lua |  2 +-
 2 files changed, 9 insertions(+), 7 deletions(-)

(limited to 'testes')

diff --git a/testes/api.lua b/testes/api.lua
index bd85a923..f8e36ae3 100644
--- a/testes/api.lua
+++ b/testes/api.lua
@@ -1039,10 +1039,12 @@ assert(a == nil and b == 2)   -- 2 == run-time error
 a, b, c = T.doremote(L1, "return a+")
 assert(a == nil and c == 3 and type(b) == "string")   -- 3 == syntax error
 
-T.loadlib(L1)
+T.loadlib(L1, 2)    -- load only 'package'
 a, b, c = T.doremote(L1, [[
   string = require'string'
-  a = require'_G'; assert(a == _G and require("_G") == a)
+  local initialG = _G   -- not loaded yet
+  local a = require'_G'; assert(a == _G and require("_G") == a)
+  assert(initialG == nil and io == nil)   -- now we have 'assert'
   io = require'io'; assert(type(io.read) == "function")
   assert(require("io") == io)
   a = require'table'; assert(type(a.insert) == "function")
@@ -1056,7 +1058,7 @@ T.closestate(L1);
 
 
 L1 = T.newstate()
-T.loadlib(L1)
+T.loadlib(L1, 0)
 T.doremote(L1, "a = {}")
 T.testC(L1, [[getglobal "a"; pushstring "x"; pushint 1;
              settable -3]])
@@ -1436,10 +1438,10 @@ end
 
 do   -- garbage collection with no extra memory
   local L = T.newstate()
-  T.loadlib(L)
+  T.loadlib(L, 1 | 2)   -- load _G and 'package'
   local res = (T.doremote(L, [[
-    _ENV = require"_G"
-    local T = require"T"
+    _ENV = _G
+    assert(string == nil)
     local a = {}
     for i = 1, 1000 do a[i] = 'i' .. i end    -- grow string table
     local stsize, stuse = T.querystr()
diff --git a/testes/coroutine.lua b/testes/coroutine.lua
index 15fccc30..f05672a5 100644
--- a/testes/coroutine.lua
+++ b/testes/coroutine.lua
@@ -694,7 +694,7 @@ else
 
   T.testC(state, "settop 0")
 
-  T.loadlib(state)
+  T.loadlib(state, 1 | 2)   -- load _G and 'package'
 
   assert(T.doremote(state, [[
     coroutine = require'coroutine';
-- 
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