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#include <doctest/doctest.h>
#ifndef DOCTEST_CONFIG_NO_EXCEPTIONS
DOCTEST_MAKE_STD_HEADERS_CLEAN_FROM_WARNINGS_ON_WALL_BEGIN
#include <thread>
#include <mutex>
#include <exception>
#include <stdexcept>
DOCTEST_MAKE_STD_HEADERS_CLEAN_FROM_WARNINGS_ON_WALL_END
DOCTEST_MSVC_SUPPRESS_WARNING(4626) // assignment operator was implicitly defined as deleted
TEST_CASE("threads...") {
auto call_from_thread = [](int value) {
INFO("print me!");
// one of these has to fail
CHECK(value == 1);
CHECK(value == 2);
};
int data_1 = 1;
int data_2 = 2;
CAPTURE(data_1); // will not be used for assertions in other threads
// subcases have to be used only in the main thread (where the test runner is)
SUBCASE("test runner thread") {
call_from_thread(data_1);
}
// normal threads which are assumed not to throw
SUBCASE("spawned threads") {
std::thread t1(call_from_thread, data_1);
std::thread t2(call_from_thread, data_2);
t1.join();
t2.join();
}
// exceptions from threads (that includes failing REQUIRE asserts) have to be handled explicitly
SUBCASE("spawned threads with exception propagation") {
std::exception_ptr exception_ptr = nullptr;
std::mutex mutex;
auto might_throw = [&]() {
try {
REQUIRE(1 == 1);
REQUIRE(1 == 2); // will fail and throw an exception
MESSAGE("not reached!");
} catch(...) {
// make sure there are no races when dealing with the exception ptr
std::lock_guard<std::mutex> lock(mutex);
// set the exception pointer in case of an exception - might overwrite
// another exception but here we care about propagating any exception - not all
exception_ptr = std::current_exception();
}
};
std::thread t1(might_throw);
std::thread t2(might_throw);
t1.join();
t2.join();
// if any thread has thrown an exception - rethrow it
if(exception_ptr)
std::rethrow_exception(exception_ptr);
}
}
#endif // DOCTEST_CONFIG_NO_EXCEPTIONS
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