ls-standard-library/test/cases/io/FileWriterTest.cpp

/*
 * Author:          Patrick-Christopher Mattulat
 * Co-Author:       Claude Sonnet 4.6 (LLM)
 * Company:         Lynar Studios
 * E-Mail:          webmaster@lynarstudios.com
 * Created:         2020-08-17
 * Changed:         2026-06-23
 *
 * */

#include <classes/TestHelper.hpp>
#include <gtest/gtest.h>
#include <ls-std/ls-std-core.hpp>
#include <ls-std/ls-std-io.hpp>

using ls::standard::core::FileNotFoundException;
using ls::standard::io::File;
using ls::standard::io::FileWriter;
using ls::standard::test::TestHelper;
using std::string;
using testing::Test;

namespace
{
  class FileWriterTest : public Test
  {
    public:

      FileWriterTest() = default;
      ~FileWriterTest() override = default;
  };

  TEST_F(FileWriterTest, constructor_file_does_not_exist)
  {
    const string path = TestHelper::getResourcesFolderLocation() + "not-existing-file.txt";
    const File file{path};

    EXPECT_THROW(
        {
          try
          {
            FileWriter writer{file};
          }
          catch (const FileNotFoundException &_exception)
          {
            throw;
          }
        },
        FileNotFoundException);
  }

  TEST_F(FileWriterTest, reset)
  {
    string path = TestHelper::getResourcesFolderLocation() + "tmp-file-writer-test.txt";
    File file{path};
    file.createNewFile();
    FileWriter writer{file};
    ASSERT_TRUE(writer.write("Testing something!\n"));

    // reset

    path = TestHelper::getResourcesFolderLocation() + "tmp-file-writer-test2.txt";
    File anotherFile{path};
    anotherFile.createNewFile();

    writer.reset(anotherFile);
    ASSERT_TRUE(writer.write("Testing something else!\n"));

    // remove

    file.remove();
    ASSERT_FALSE(file.exists());
    anotherFile.remove();
    ASSERT_FALSE(anotherFile.exists());
  }

  TEST_F(FileWriterTest, write)
  {
    const string path = TestHelper::getResourcesFolderLocation() + "tmp-file-writer-test.txt";
    const File file{path};

    ASSERT_FALSE(file.exists());
    file.createNewFile();
    ASSERT_TRUE(file.exists());

    FileWriter writer{file};
    ASSERT_TRUE(writer.write("Testing something!\n"));

    file.remove();
    ASSERT_FALSE(file.exists());
  }
}