Add test to make sure simultaneous ChaiScript instantiations work

CMakeLists.txt

@@ -200,6 +200,10 @@ if(BUILD_TESTING)
     target_link_libraries(set_state_test ${LIBS})
     add_test(NAME Set_State_Test COMMAND set_state_test)
 
+    add_executable(simultaneous_chaiscript_test unittests/simultaneous_chaiscript_test.cpp)
+    target_link_libraries(simultaneous_chaiscript_test ${LIBS})
+    add_test(NAME Simultaneous_Chaiscript_Test COMMAND simultaneous_chaiscript_test)
+
     if (MULTITHREAD_SUPPORT_ENABLED)
       add_executable(multithreaded_test unittests/multithreaded_test.cpp)
       target_link_libraries(multithreaded_test ${LIBS})

unittests/simultaneous_chaiscript_test.cpp

@@ -0,0 +1,60 @@
+#include <chaiscript/chaiscript.hpp>
+
+int dosomething(int i)
+{
+  return i + 2;
+}
+
+int dosomethingelse(int i)
+{
+  return i * 2;
+}
+
+
+
+int main()
+{
+  chaiscript::ChaiScript chai;
+  chai.add(chaiscript::fun(&dosomething), "dosomething");
+  chai.add(chaiscript::var(1), "i");
+
+  for (int i = 0; i < 10; ++i)
+  {
+    chaiscript::ChaiScript chai2;
+    chai2.add(chaiscript::fun(&dosomethingelse), "dosomethingelse");
+
+    std::stringstream ss;
+    ss << i;
+
+    if (chai.eval<int>("dosomething(" + ss.str() + ")") != i + 2)
+    {
+      return EXIT_FAILURE;
+    }
+
+    if (chai2.eval<int>("dosomethingelse(" + ss.str() + ")") != i * 2)
+    {
+      return EXIT_FAILURE;
+    }
+
+    try {
+      chai2.eval("dosomething(1)");
+      return EXIT_FAILURE; // should not get here
+    } catch (const chaiscript::exception::eval_error &) {
+      // nothing to do, expected case
+    }
+
+    try {
+      chai2.eval("i");
+      return EXIT_FAILURE; // should not get here
+    } catch (const chaiscript::exception::eval_error &) {
+      // nothing to do, expected case
+    }
+
+    try {
+      chai.eval("dosomethingelse(1)");
+      return EXIT_FAILURE; // should not get here
+    } catch (const chaiscript::exception::eval_error &) {
+      // nothing to do, expected case
+    }
+  }
+}