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// https://github.com/vinniefalco/LuaBridge
//
// Copyright 2019, Dmitry Tarakanov
// Copyright 2012, Vinnie Falco <vinnie.falco@gmail.com>
// Copyright 2007, Nathan Reed
// SPDX-License-Identifier: MIT
#pragma once
#include "Lua/LuaLibrary.h"
#include "LuaBridge/LuaBridge.h"
#include <gtest/gtest.h>
#include <stdexcept>
// traceback function, adapted from lua.c
// when a runtime error occurs, this will append the call stack to the error message
//
inline int traceback (lua_State* L)
{
// look up Lua's 'debug.traceback' function
lua_getglobal (L, "debug");
if (!lua_istable (L, -1))
{
lua_pop (L, 1);
return 1;
}
lua_getfield (L, -1, "traceback");
if (!lua_isfunction (L, -1))
{
lua_pop (L, 2);
return 1;
}
lua_pushvalue (L, 1); /* pass error message */
lua_pushinteger (L, 2); /* skip this function and traceback */
lua_call (L, 2, 1); /* call debug.traceback */
return 1;
}
/// Base test class. Introduces the global 'result' variable,
/// used for checking of C++ - Lua interoperation.
///
struct TestBase : public ::testing::Test
{
lua_State* L = nullptr;
void SetUp () override
{
L = nullptr;
L = luaL_newstate ();
luaL_openlibs (L);
lua_pushcfunction (L, &traceback);
}
void TearDown () override
{
if (L != nullptr)
{
lua_close (L);
}
}
void runLua (const std::string& script) const
{
if (luaL_loadstring (L, script.c_str ()) != 0)
{
throw std::runtime_error (lua_tostring (L, -1));
}
if (lua_pcall (L, 0, 0, -2) != 0)
{
throw std::runtime_error (lua_tostring (L, -1));
}
}
template <class T = luabridge::LuaRef>
T result () const
{
return luabridge::getGlobal (L, "result").cast <T> ();
}
void resetResult () const
{
luabridge::setGlobal (L, luabridge::LuaRef (L), "result");
}
void printStack () const
{
std::cerr << "===== Stack =====\n";
for (int i = 1; i <= lua_gettop (L); ++i)
{
std::cerr << "@" << i << " = " << luabridge::LuaRef::fromStack (L, i) << "\n";
}
}
};
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