[test-suite] goto.js

1 files changed, 434 insertions, 0 deletions

diff --git a/tests/test-suite/goto.js b/tests/test-suite/goto.js
new file mode 100644
index 0000000..696ab16
--- /dev/null
+++ b/tests/test-suite/goto.js
@@ -0,0 +1,434 @@
+"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');
+
+
+test("[test-suite] goto: error messages", function (t) {
+    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'")
+    `, 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] goto: simple gotos", function (t) {
+    let luaCode = `
+        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)
+    `, 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] goto: long labels", function (t) {
+    let luaCode = `
+        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
+    `, 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] goto: goto to correct label when nested", function (t) {
+    let luaCode = `
+        do goto l3; ::l3:: end   -- does not loop jumping to previous label 'l3'
+    `, 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] goto: ok to jump over local dec. to end of block", function (t) {
+    let luaCode = `
+        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
+    `, 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] goto: to repeat a label in a different function is OK", function (t) {
+    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()
+    `, 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] goto: bug in 5.2 -> 5.3.2", function (t) {
+    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
+    `, 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] goto: testing closing of upvalues", function (t) {
+    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
+    `, 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] goto: testing if x goto optimizations", function (t) {
+    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)
+    `, 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");
+
+});