// Test that validates exception propagation through the Emscripten eval wrapper.

// Without proper exception support flags (-fwasm-exceptions) in the WASM build,

// C++ exceptions would cause an abort instead of being catchable.

#ifndef CHAISCRIPT_NO_THREADS

#define CHAISCRIPT_NO_THREADS

#endif

#ifndef CHAISCRIPT_NO_DYNLOAD

#define CHAISCRIPT_NO_DYNLOAD

#endif

#include "../emscripten/chaiscript_eval.hpp"

#include <cassert>

#include <chaiscript/chaiscript.hpp>

#include <iostream>

#include <stdexcept>

#include <string>

int main() {

// Verify that ChaiScript evaluation errors propagate as exceptions

// through the eval wrapper functions. In WASM builds without exception

// support, these would abort instead of throwing.

const int chai = chaiscript_create();

[[maybe_unused]] bool caught = false;

// Test 1: eval with undefined variable should throw

caught = false;

try {

chaiscript_eval(chai, "this_variable_does_not_exist");

} catch (const chaiscript::exception::eval_error &) {

caught = true;

}

assert(caught && "eval of undefined variable must throw eval_error");

// Test 2: evalString with a type mismatch should throw

caught = false;

try {

chaiscript_eval_string(chai, "1 + 2");

} catch (const chaiscript::exception::bad_boxed_cast &) {

caught = true;

}

assert(caught && "evalString with non-string result must throw bad_boxed_cast");

// Test 3: evalInt with invalid syntax should throw

caught = false;

try {

chaiscript_eval_int(chai, "def {}");

} catch (const chaiscript::exception::eval_error &) {

caught = true;

}

assert(caught && "evalInt with syntax error must throw eval_error");

// Test 4: eval with throw statement should propagate exception

caught = false;

try {

chaiscript_eval(chai, "throw(\"user exception\")");

} catch (const chaiscript::Boxed_Value &) {

caught = true;

} catch (...) {

caught = true;

}

assert(caught && "ChaiScript throw must propagate as an exception");

// Test 5: Verify normal operation still works after caught exceptions

chaiscript_eval(chai, "var post_exception_test = 100");

[[maybe_unused]] const int result = chaiscript_eval_int(chai, "post_exception_test");

assert(result == 100 && "normal eval must work after caught exceptions");

chaiscript_destroy(chai);

std::cout << "All emscripten exception tests passed.\n";

return 0;

}