test_utils.hpp

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// Copyright 2011 Google Inc.
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// modification, are permitted provided that the following conditions are
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//
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#if !defined(LUTOK_TEST_UTILS_HPP)
#   define LUTOK_TEST_UTILS_HPP
#else
#   error "test_utils.hpp can only be included once"
#endif

#include <atf-c++.hpp>

#include "c_gate.hpp"
#include "exceptions.hpp"
#include "state.hpp"


namespace {


#define REQUIRE_API_ERROR(exp_api_function, statement) \
    do { \
        try { \
            statement; \
            ATF_FAIL("api_error not raised by " #statement); \
        } catch (const lutok::api_error& api_error) { \
            ATF_REQUIRE_EQ(exp_api_function, api_error.api_function()); \
        } \
    } while (0)


static inline lua_State*
raw(lutok::state& state)
{
    return lutok::state_c_gate(state).c_state();
}


class stack_balance_checker {
    lutok::state& _state;

    bool _with_sentinel;

    unsigned int _old_count;

public:
    stack_balance_checker(lutok::state& state_,
                          const bool with_sentinel_ = true) :
        _state(state_),
        _with_sentinel(with_sentinel_),
        _old_count(_state.get_top())
    {
        if (_with_sentinel)
            _state.push_integer(987654321);
    }

    ~stack_balance_checker(void)
    {
        if (_with_sentinel) {
            if (!_state.is_number(-1) || _state.to_integer(-1) != 987654321)
                ATF_FAIL("Stack corrupted: sentinel not found");
            _state.pop(1);
        }

        unsigned int new_count = _state.get_top();
        if (_old_count != new_count)
            //ATF_FAIL(F("Stack not balanced: before %d, after %d") %
            //         _old_count % new_count);
            ATF_FAIL("Stack not balanced");
    }
};


}  // anonymous namespace