memmappedfile-fix (#115)

Co-authored-by: Metehan Tuncbilek <mtuncbilek95@gmail.com>
Reviewed-by: Georg Hagen <georg.hagen@madvoxel.com>
Co-authored-by: mtuncbilek <metehan.tuncbilek@madvoxel.com>
Co-committed-by: mtuncbilek <metehan.tuncbilek@madvoxel.com>

tests/MemFileTests.cpp

@@ -0,0 +1,126 @@
+#include <catch2/catch_all.hpp>
+
+#include "IO/MemMappedFile.hpp"
+#include "IO/MemMappedFileWriteHelper.hpp"
+#include "IO/AppFolders.hpp"
+#include "Base/Logger.hpp"
+
+#include <fstream>
+#include <filesystem>
+
+namespace fs = std::filesystem;
+
+TEST_CASE("MemMappedFileWrite")
+{
+	OpenVulkano::Logger::SetupLogger("", "tests.log");
+
+	auto path = OpenVulkano::AppFolders::GetAppTempDir();
+	path += "/MemFileTest.txt";
+
+	std::string data = "Hello World X\n"
+	                   "Hello World Y\n"
+	                   "Hello World Z\n"
+	                   "Hello World W\n"
+	                   "Hello World A\n"
+	                   "Hello World B\n"
+	                   "Hello World C\n"
+	                   "Hello World D\n"
+	                   "Hello World E\n"
+	                   "Hello World F\n"
+	                   "Hello World G\n"
+	                   "Hello World H\n"
+	                   "Hello World I\n"
+	                   "Hello World J\n"
+	                   "Hello World K\n"
+	                   "Hello World L\n"
+	                   "Hello World M\n"
+	                   "Hello World N\n";
+
+
+	SECTION("Write to MemMappedFile")
+	{
+		OpenVulkano::MemMappedFileWriter writer(path, 1024);
+		writer.Write(data.data(), data.size());
+
+		REQUIRE(writer.GetOffset() == data.size());
+	}
+
+	SECTION("Control Size")
+	{
+		OpenVulkano::MemMappedFile memFile(path, OpenVulkano::MemMappedFile::READ_ONLY);
+		REQUIRE(memFile.Size() == 1024); // The size that comes from the first Test.
+	}
+
+	SECTION("Compare String Data for per char")
+	{
+		OpenVulkano::MemMappedFileWriteHelper memFileHelper(path, OpenVulkano::MemMappedFile::READ_ONLY);
+		REQUIRE(memFileHelper.Trim(data.size()));
+
+		std::string testData((char*) memFileHelper.Data());
+
+		for (size_t i = 0; i < data.size(); i++)
+		{
+			if (data[i] != testData[i])
+			{
+				REQUIRE(false);
+			}
+		}
+
+		memFileHelper.Close();
+	}
+
+	SECTION("Trim File")
+	{
+		OpenVulkano::MemMappedFileWriteHelper helper(path,
+		                                             OpenVulkano::MemMappedFileWriteHelper::USE_CURRENT_FILE_SIZE);
+		REQUIRE(helper.Trim(100));
+		REQUIRE(helper.Size() == 100);
+
+		helper.Close();
+	}
+
+	SECTION("Write Data 2")
+	{
+		OpenVulkano::MemMappedFileWriter writer(path, OpenVulkano::MemMappedFileWriteHelper::USE_CURRENT_FILE_SIZE);
+		writer.Write(data.data(), data.size());
+		writer.Write(data.data(), data.size());
+		writer.Write(data.data(), data.size());
+
+		REQUIRE(writer.GetOffset() == data.size() * 3);
+	}
+
+	SECTION("Compare Data")
+	{
+		OpenVulkano::MemMappedFileWriteHelper helper(path,
+		                                             OpenVulkano::MemMappedFileWriteHelper::USE_CURRENT_FILE_SIZE);
+		REQUIRE(helper.Data() != nullptr);
+		std::string testData((char*) helper.Data());
+		printf("size: %llu", helper.Size());
+		helper.Close();
+
+		std::ifstream file(path, std::ios::binary);
+		std::string streamData;
+		std::getline(file, streamData, '\0');
+		file.close();
+
+		for (size_t i = 0; i < testData.size(); i++)
+		{
+			if (streamData[i] != testData[i])
+			{
+				REQUIRE(false);
+			}
+		}
+
+		REQUIRE(streamData.size() == testData.size());
+
+		printf("helper size: %llu\n", helper.Size());
+	}
+
+	SECTION("Actual Size")
+	{
+		std::error_code ec;
+		std::uintmax_t size = fs::file_size(path, ec);
+
+		REQUIRE(size == 756);
+	}
+}