2 files changed, 72 insertions, 3 deletions

diff --git a/tests/test-suite/inprogress/coroutine.js b/tests/test-suite/inprogress/coroutine.js
index 3161bf0..602e050 100644
--- a/tests/test-suite/inprogress/coroutine.js
+++ b/tests/test-suite/inprogress/coroutine.js
@@ -8,6 +8,7 @@ const lua     = require('../../../src/lua.js');
 const lauxlib = require('../../../src/lauxlib.js');
 const lualib  = require('../../../src/lualib.js');
 
+const ltests  = require('../ltests.js');
 
 const prefix = `
     mt = {
@@ -656,8 +657,58 @@ test("[test-suite] coroutine: access to locals of erroneous coroutines", functio
 
 });
 
-test("[test-suite] coroutine: JS Tests", { skip: true }, function (t) {
-    t.comment("TODO");
+const jsprefix = `
+    T = require('T')
+
+    function fact (t, x)
+      assert(turn == t)
+      if x == 0 then return 1
+      else return x*fact(t, x-1)
+      end
+    end
+`;
+
+test("[test-suite] coroutine: testing yields inside hooks", function (t) {
+    let luaCode = `
+        local A, B = 0, 0
+
+        local x = coroutine.create(function ()
+          T.sethook("yield 0", "", 2)
+          A = fact("A", 6)
+        end)
+
+        local y = coroutine.create(function ()
+          T.sethook("yield 0", "", 3)
+          B = fact("B", 7)
+        end)
+
+        while A==0 or B==0 do    -- A ~= 0 when 'x' finishes (similar for 'B','y')
+          if A==0 then turn = "A"; assert(T.resume(x)) end
+          if B==0 then turn = "B"; assert(T.resume(y)) end
+        end
+
+        assert(B // A == 7)    -- fact(7) // fact(6)
+    `, L;
+    
+    t.plan(2);
+
+    t.doesNotThrow(function () {
+
+        L = lauxlib.luaL_newstate();
+
+        lualib.luaL_openlibs(L);
+
+        ltests.luaopen_tests(L);
+
+        lauxlib.luaL_loadstring(L, lua.to_luastring(jsprefix + luaCode));
+
+    }, "Lua program loaded without error");
+
+    t.doesNotThrow(function () {
+
+        lua.lua_call(L, 0, -1);
+
+    }, "Lua program ran without error");
 });
 
 
diff --git a/tests/test-suite/ltests.js b/tests/test-suite/ltests.js
index fc81131..dcc8cec 100644
--- a/tests/test-suite/ltests.js
+++ b/tests/test-suite/ltests.js
@@ -102,7 +102,7 @@ const runJS = function(L, L1, pc) {
     let status = 0;  
     if (!pc || pc.length === 0) return lauxlib.luaL_error(L, "attempt to runJS empty script");
     for (;;) {
-        let inst = getstring(L, buff, pc);
+        let inst = lua.to_jsstring(getstring(L, buff, pc).slice(0, -1));
         if (inst.length === 0) return 0;
         else if (inst === "absindex") {
             lua.lua_pushnumber(1, lua.lua_absindex(1, getindex(L, L1, pc)));
@@ -385,6 +385,7 @@ const sethook = function(L) {
         if (count > 0) mask |= lua.LUA_MASKCOUNT;
         sethookaux(L, mask, count, scpt);
     }
+    return 0;
 };
 
 const Cfunck = function(L, status, ctx) {
@@ -395,8 +396,25 @@ const Cfunck = function(L, status, ctx) {
     return runJS(L, L, lua.lua_tostring(L, ctx));
 };
 
+const coresume = function(L) {
+    let status;
+    let co = lua.lua_tothread(L, 1);
+    lauxlib.luaL_argcheck(L, co, 1, lua.to_luastring("coroutine expected", true));
+    status = lua.lua_resume(co, L, 0);
+    if (status != lua.LUA_OK && status !== lua.LUA_YIELD) {
+        lua.lua_pushboolean(L, 0);
+        lua.lua_insert(L, -2);
+        return 2;  /* return false + error message */
+    }
+    else {
+        lua.lua_pushboolean(L, 1);
+        return 1;
+    }
+};
+
 const tests_funcs = {
     "newuserdata": newuserdata,
+    "resume": coresume,
     "sethook": sethook
 };