spdlog/tests/errors.cpp

/*
* This content is released under the MIT License as specified in https://raw.githubusercontent.com/gabime/spdlog/master/LICENSE
*/
#include "includes.h"

#include<iostream>


TEST_CASE("default_error_handler", "[errors]]")
{
	prepare_logdir();
	std::string filename = "logs/simple_log.txt";

	auto logger = spdlog::create<spdlog::sinks::simple_file_sink_mt>("logger", filename, true);
	logger->set_pattern("%v");				
	logger->info("Test message {} {}", 1);	
	logger->info("Test message {}", 2);
	logger->flush();

	REQUIRE(file_contents(filename) == std::string("Test message 2\n"));
	REQUIRE(count_lines(filename) == 1);
}


struct custom_ex{};
TEST_CASE("custom_error_handler", "[errors]]")
{
	prepare_logdir();
	std::string filename = "logs/simple_log.txt";	
	auto logger = spdlog::create<spdlog::sinks::simple_file_sink_mt>("logger", filename, true);	
	logger->set_error_handler([=](const std::string& msg) {
		throw custom_ex();
	});
	logger->info("Good message #1");
	REQUIRE_THROWS_AS(logger->info("Bad format msg {} {}", "xxx"), custom_ex);
	logger->info("Good message #2");	
	REQUIRE(count_lines(filename) == 2);
}

TEST_CASE("async_error_handler", "[errors]]")
{
	prepare_logdir();
	std::string err_msg("log failed with some msg");
	spdlog::set_async_mode(128);
	std::string filename = "logs/simple_async_log.txt";
	{
		auto logger = spdlog::create<spdlog::sinks::simple_file_sink_mt>("logger", filename, true);
		logger->set_error_handler([=](const std::string& msg) {
			std::ofstream ofs("logs/custom_err.txt");
			if (!ofs) throw std::runtime_error("Failed open logs/custom_err.txt");
			ofs << err_msg;			
		});		
		logger->info("Good message #1");	
		logger->info("Bad format msg {} {}", "xxx");
		logger->info("Good message #2");
		spdlog::drop("logger"); //force logger to drain the queue and shutdown
		spdlog::set_sync_mode();
	}
	REQUIRE(count_lines(filename) == 2);
	REQUIRE(file_contents("logs/custom_err.txt") == err_msg);
}