cpp17-threaded-app-non-threadsafe-logger/tests/logger/helpers/scoped_file_test.cpp

#include <cassert>
#include <filesystem>
#include <fstream>
#include <stdexcept>
#include <sys/stat.h>

#include "scoped_file.hpp"

namespace {

using namespace logger::tests::helpers;

void testFileRemovedAfterScope() {
  const std::string fileName = "scoped_file_test.log";

  {
    ScopedFile file(fileName);

    file.throwIfExists();

    std::ofstream output(file.getFileName());

    assert(output.is_open());

    output << "test";

    output.close();

    assert(std::filesystem::exists(fileName));
  } // call ~ScopedFile()

  assert(!std::filesystem::exists(fileName));
}

void testThrowIfExists() {
  const std::string fileName = "existing_file.log";

  {
    ScopedFile file(fileName);

    if (std::filesystem::exists(fileName)) {
      throw std::runtime_error("Test file already exists: " + fileName);
    }

    std::ofstream output(file.getFileName());

    assert(output.is_open());

    output.close();

    bool thrown = false;

    try {
      file.throwIfExists();
    } catch (const std::runtime_error &) {
      thrown = true;
    }

    assert(thrown);
  }

  assert(!std::filesystem::exists(fileName));
}

void testGetFileName() {
  ScopedFile file("test.log");

  file.throwIfExists();

  assert(file.getFileName() == "test.log");
}

void runTests() {
  testFileRemovedAfterScope();
  testThrowIfExists();
  testGetFileName();
}

} // namespace

int main() {
  runTests();

  return 0;
}