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#include <fstream>
#include <thread>
#include "catch2/catch.hpp"
#include "src/buildtool/file_system/file_system_manager.hpp"
#include "src/buildtool/logging/log_config.hpp"
#include "src/buildtool/logging/log_sink_cmdline.hpp"
#include "src/buildtool/logging/log_sink_file.hpp"
[[nodiscard]] static auto NumberOfLines(std::filesystem::path const& file_path)
-> int {
std::ifstream file(file_path);
std::string line{};
int number_of_lines{};
while (std::getline(file, line)) {
++number_of_lines;
}
return number_of_lines;
}
[[nodiscard]] static auto GetLines(std::filesystem::path const& file_path)
-> std::vector<std::string> {
std::ifstream file(file_path);
std::string line{};
std::vector<std::string> lines{};
while (std::getline(file, line)) {
lines.push_back(line);
}
return lines;
}
TEST_CASE("LogSinkFile", "[logging]") {
LogConfig::SetSinks({LogSinkCmdLine::CreateFactory(false /*no color*/)});
// cleanup
std::string filename{"test/test.log"};
CHECK(FileSystemManager::RemoveFile(filename));
REQUIRE(not FileSystemManager::IsFile(filename));
// create test log file
REQUIRE(FileSystemManager::WriteFile("somecontent\n", filename));
REQUIRE(FileSystemManager::IsFile(filename));
CHECK(NumberOfLines(filename) == 1);
SECTION("Overwrite mode") {
LogSinkFile sink{filename, LogSinkFile::Mode::Overwrite};
sink.Emit(nullptr, LogLevel::Info, "first");
sink.Emit(nullptr, LogLevel::Info, "second");
sink.Emit(nullptr, LogLevel::Info, "third");
// read file and check line numbers
CHECK(NumberOfLines(filename) == 3);
}
SECTION("Append mode") {
LogSinkFile sink{filename, LogSinkFile::Mode::Append};
sink.Emit(nullptr, LogLevel::Info, "first");
sink.Emit(nullptr, LogLevel::Info, "second");
sink.Emit(nullptr, LogLevel::Info, "third");
// read file and check line numbers
CHECK(NumberOfLines(filename) == 4);
}
SECTION("Thread-safety") {
int const num_threads = 20;
LogSinkFile sink{filename, LogSinkFile::Mode::Append};
// start threads, each emitting a log message
std::vector<std::thread> threads{};
for (int id{}; id < num_threads; ++id) {
threads.emplace_back(
[&](int tid) {
sink.Emit(nullptr,
LogLevel::Info,
"this is thread " + std::to_string(tid));
},
id);
}
// wait for threads to finish
for (auto& thread : threads) {
thread.join();
}
// read file and check line numbers
auto lines = GetLines(filename);
CHECK(lines.size() == num_threads + 1);
// check for corrupted content
using Catch::Matchers::Contains;
for (auto const& line : lines) {
CHECK_THAT(line,
Contains("somecontent") or Contains("this is thread "));
}
}
}
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