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-rw-r--r--test/test-suite/goto.test.js290
1 files changed, 290 insertions, 0 deletions
diff --git a/test/test-suite/goto.test.js b/test/test-suite/goto.test.js
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+"use strict";
+
+const lua = require('../../src/lua.js');
+const lauxlib = require('../../src/lauxlib.js');
+const lualib = require('../../src/lualib.js');
+const {to_luastring} = require("../../src/fengaricore.js");
+
+test("[test-suite] goto: error messages", () => {
+ let L = lauxlib.luaL_newstate();
+ if (!L) throw Error("failed to create lua state");
+
+ let luaCode = `
+ local function errmsg (code, m)
+ local st, msg = load(code)
+ assert(not st and string.find(msg, m))
+ end
+
+ -- cannot see label inside block
+ errmsg([[ goto l1; do ::l1:: end ]], "label 'l1'")
+ errmsg([[ do ::l1:: end goto l1; ]], "label 'l1'")
+
+ -- repeated label
+ errmsg([[ ::l1:: ::l1:: ]], "label 'l1'")
+
+
+ -- undefined label
+ errmsg([[ goto l1; local aa ::l1:: ::l2:: print(3) ]], "local 'aa'")
+
+ -- jumping over variable definition
+ errmsg([[
+ do local bb, cc; goto l1; end
+ local aa
+ ::l1:: print(3)
+ ]], "local 'aa'")
+
+ -- jumping into a block
+ errmsg([[ do ::l1:: end goto l1 ]], "label 'l1'")
+ errmsg([[ goto l1 do ::l1:: end ]], "label 'l1'")
+
+ -- cannot continue a repeat-until with variables
+ errmsg([[
+ repeat
+ if x then goto cont end
+ local xuxu = 10
+ ::cont::
+ until xuxu < x
+ ]], "local 'xuxu'")
+ `;
+ lualib.luaL_openlibs(L);
+ if (lauxlib.luaL_loadstring(L, to_luastring(luaCode)) === lua.LUA_ERRSYNTAX)
+ throw new SyntaxError(lua.lua_tojsstring(L, -1));
+ lua.lua_call(L, 0, 0);
+});
+
+
+test("[test-suite] goto", () => {
+ let L = lauxlib.luaL_newstate();
+ if (!L) throw Error("failed to create lua state");
+
+ let luaCode = `
+ -- simple gotos
+ local x
+ do
+ local y = 12
+ goto l1
+ ::l2:: x = x + 1; goto l3
+ ::l1:: x = y; goto l2
+ end
+ ::l3:: ::l3_1:: assert(x == 13)
+
+ -- long labels
+ do
+ local prog = [[
+ do
+ local a = 1
+ goto l%sa; a = a + 1
+ ::l%sa:: a = a + 10
+ goto l%sb; a = a + 2
+ ::l%sb:: a = a + 20
+ return a
+ end
+ ]]
+ local label = string.rep("0123456789", 40)
+ prog = string.format(prog, label, label, label, label)
+ assert(assert(load(prog))() == 31)
+ end
+
+ -- goto to correct label when nested
+ do goto l3; ::l3:: end -- does not loop jumping to previous label 'l3'
+
+ -- ok to jump over local dec. to end of block
+ do
+ goto l1
+ local a = 23
+ x = a
+ ::l1::;
+ end
+
+ while true do
+ goto l4
+ goto l1 -- ok to jump over local dec. to end of block
+ goto l1 -- multiple uses of same label
+ local x = 45
+ ::l1:: ;;;
+ end
+ ::l4:: assert(x == 13)
+
+ if print then
+ goto l1 -- ok to jump over local dec. to end of block
+ error("should not be here")
+ goto l2 -- ok to jump over local dec. to end of block
+ local x
+ ::l1:: ; ::l2:: ;;
+ else end
+ `;
+ lualib.luaL_openlibs(L);
+ if (lauxlib.luaL_loadstring(L, to_luastring(luaCode)) === lua.LUA_ERRSYNTAX)
+ throw new SyntaxError(lua.lua_tojsstring(L, -1));
+ lua.lua_call(L, 0, 0);
+});
+
+
+test("[test-suite] goto: to repeat a label in a different function is OK", () => {
+ let L = lauxlib.luaL_newstate();
+ if (!L) throw Error("failed to create lua state");
+
+ let luaCode = `
+ local function foo ()
+ local a = {}
+ goto l3
+ ::l1:: a[#a + 1] = 1; goto l2;
+ ::l2:: a[#a + 1] = 2; goto l5;
+ ::l3::
+ ::l3a:: a[#a + 1] = 3; goto l1;
+ ::l4:: a[#a + 1] = 4; goto l6;
+ ::l5:: a[#a + 1] = 5; goto l4;
+ ::l6:: assert(a[1] == 3 and a[2] == 1 and a[3] == 2 and
+ a[4] == 5 and a[5] == 4)
+ if not a[6] then a[6] = true; goto l3a end -- do it twice
+ end
+
+ ::l6:: foo()
+ `;
+ lualib.luaL_openlibs(L);
+ if (lauxlib.luaL_loadstring(L, to_luastring(luaCode)) === lua.LUA_ERRSYNTAX)
+ throw new SyntaxError(lua.lua_tojsstring(L, -1));
+ lua.lua_call(L, 0, 0);
+});
+
+
+test("[test-suite] goto: bug in 5.2 -> 5.3.2", () => {
+ let L = lauxlib.luaL_newstate();
+ if (!L) throw Error("failed to create lua state");
+
+ let luaCode = `
+ do -- bug in 5.2 -> 5.3.2
+ local x
+ ::L1::
+ local y -- cannot join this SETNIL with previous one
+ assert(y == nil)
+ y = true
+ if x == nil then
+ x = 1
+ goto L1
+ else
+ x = x + 1
+ end
+ assert(x == 2 and y == true)
+ end
+ `;
+ lualib.luaL_openlibs(L);
+ if (lauxlib.luaL_loadstring(L, to_luastring(luaCode)) === lua.LUA_ERRSYNTAX)
+ throw new SyntaxError(lua.lua_tojsstring(L, -1));
+ lua.lua_call(L, 0, 0);
+});
+
+
+test("[test-suite] goto: testing closing of upvalues", () => {
+ let L = lauxlib.luaL_newstate();
+ if (!L) throw Error("failed to create lua state");
+
+ let luaCode = `
+ local function foo ()
+ local t = {}
+ do
+ local i = 1
+ local a, b, c, d
+ t[1] = function () return a, b, c, d end
+ ::l1::
+ local b
+ do
+ local c
+ t[#t + 1] = function () return a, b, c, d end -- t[2], t[4], t[6]
+ if i > 2 then goto l2 end
+ do
+ local d
+ t[#t + 1] = function () return a, b, c, d end -- t[3], t[5]
+ i = i + 1
+ local a
+ goto l1
+ end
+ end
+ end
+ ::l2:: return t
+ end
+
+ local a = foo()
+ assert(#a == 6)
+
+ -- all functions share same 'a'
+ for i = 2, 6 do
+ assert(debug.upvalueid(a[1], 1) == debug.upvalueid(a[i], 1))
+ end
+
+ -- 'b' and 'c' are shared among some of them
+ for i = 2, 6 do
+ -- only a[1] uses external 'b'/'b'
+ assert(debug.upvalueid(a[1], 2) ~= debug.upvalueid(a[i], 2))
+ assert(debug.upvalueid(a[1], 3) ~= debug.upvalueid(a[i], 3))
+ end
+
+ for i = 3, 5, 2 do
+ -- inner functions share 'b'/'c' with previous ones
+ assert(debug.upvalueid(a[i], 2) == debug.upvalueid(a[i - 1], 2))
+ assert(debug.upvalueid(a[i], 3) == debug.upvalueid(a[i - 1], 3))
+ -- but not with next ones
+ assert(debug.upvalueid(a[i], 2) ~= debug.upvalueid(a[i + 1], 2))
+ assert(debug.upvalueid(a[i], 3) ~= debug.upvalueid(a[i + 1], 3))
+ end
+
+ -- only external 'd' is shared
+ for i = 2, 6, 2 do
+ assert(debug.upvalueid(a[1], 4) == debug.upvalueid(a[i], 4))
+ end
+
+ -- internal 'd's are all different
+ for i = 3, 5, 2 do
+ for j = 1, 6 do
+ assert((debug.upvalueid(a[i], 4) == debug.upvalueid(a[j], 4))
+ == (i == j))
+ end
+ end
+ `;
+ lualib.luaL_openlibs(L);
+ if (lauxlib.luaL_loadstring(L, to_luastring(luaCode)) === lua.LUA_ERRSYNTAX)
+ throw new SyntaxError(lua.lua_tojsstring(L, -1));
+ lua.lua_call(L, 0, 0);
+});
+
+
+test("[test-suite] goto: testing if x goto optimizations", () => {
+ let L = lauxlib.luaL_newstate();
+ if (!L) throw Error("failed to create lua state");
+
+ let luaCode = `
+ local function testG (a)
+ if a == 1 then
+ goto l1
+ error("should never be here!")
+ elseif a == 2 then goto l2
+ elseif a == 3 then goto l3
+ elseif a == 4 then
+ goto l1 -- go to inside the block
+ error("should never be here!")
+ ::l1:: a = a + 1 -- must go to 'if' end
+ else
+ goto l4
+ ::l4a:: a = a * 2; goto l4b
+ error("should never be here!")
+ ::l4:: goto l4a
+ error("should never be here!")
+ ::l4b::
+ end
+ do return a end
+ ::l2:: do return "2" end
+ ::l3:: do return "3" end
+ ::l1:: return "1"
+ end
+
+ assert(testG(1) == "1")
+ assert(testG(2) == "2")
+ assert(testG(3) == "3")
+ assert(testG(4) == 5)
+ assert(testG(5) == 10)
+ `;
+ lualib.luaL_openlibs(L);
+ if (lauxlib.luaL_loadstring(L, to_luastring(luaCode)) === lua.LUA_ERRSYNTAX)
+ throw new SyntaxError(lua.lua_tojsstring(L, -1));
+ lua.lua_call(L, 0, 0);
+});
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