67 lines
1.6 KiB
C++
67 lines
1.6 KiB
C++
#include "doctest/doctest.h"
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#include "misc/TestUtilities.h"
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#include "quill/Backend.h"
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#include "quill/Frontend.h"
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#include "quill/LogMacros.h"
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#include "quill/sinks/FileSink.h"
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#include <cstdio>
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#include <string>
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#include <vector>
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using namespace quill;
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/***/
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TEST_CASE("log_arguments_evaluation")
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{
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static constexpr char const* filename = "log_arguments_evaluation.log";
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// Start the logging backend thread
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Backend::start();
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Frontend::preallocate();
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// Set writing logging to a file
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auto file_sink = Frontend::create_or_get_sink<FileSink>(
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filename,
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[]()
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{
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FileSinkConfig cfg;
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cfg.set_open_mode('w');
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return cfg;
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}(),
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FileEventNotifier{});
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std::string const logger_name = "logger";
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Logger* logger = Frontend::create_or_get_logger(logger_name, std::move(file_sink));
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size_t cnt{0};
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auto arg_str = [&cnt]()
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{
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++cnt;
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return "expensive_calculation";
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};
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// 1. checks that log arguments are not evaluated when we don't log
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logger->set_log_level(quill::LogLevel::Info);
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LOG_DEBUG(logger, "Test log arguments {}", arg_str());
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LOG_TRACE_L1(logger, "Test log arguments {}", arg_str());
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REQUIRE_EQ(cnt, 0);
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// 2. checks that log arguments are evaluated only once per log statement
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LOG_INFO(logger, "Test log arguments {}", arg_str());
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REQUIRE_EQ(cnt, 1);
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logger->flush_log();
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Frontend::remove_logger(logger);
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// Wait until the backend thread stops for test stability
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Backend::stop();
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// Read file and check
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std::vector<std::string> const file_contents = quill::testing::file_contents(filename);
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REQUIRE_EQ(file_contents.size(), 1);
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testing::remove_file(filename);
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} |