+ unit test to cover file io .gz

Tests/Unit/Device/RW2DTest.cpp

 #include "Base/Axis/MakeScale.h"
 
+#include "BATesting.h"
 #include "Base/Axis/Scale.h"
 #include "Device/Data/Datafield.h"
+#include "Device/IO/IOFactory.h"
 #include "Device/IO/ReadWrite2DTable.h"
 #include "Device/IO/ReadWriteINT.h"
 #include "Device/IO/ReadWriteTiff.h"
 #include "Tests/GTestWrapper/google_test.h"
+#include <filesystem>
+namespace fs = std::filesystem;
 
 class RW2DTest : public ::testing::Test {
 protected:
@@ -50,6 +54,17 @@ TEST_F(RW2DTest, rwNumpyMatrix)
         EXPECT_EQ(m_model_data[i], result[i]);
 }
 
+TEST_F(RW2DTest, gz)
+{
+    const std::string path = fs::path(BATesting::TestOutDir) / fs::path("rw2dtestdata.gz");
+    IO::writeDatafield(m_model_data, path);
+
+    Datafield result = IO::readData2D(path, IO::csv2D);
+    EXPECT_EQ(m_model_data.rank(), result.rank());
+    for (size_t i = 0, size = m_model_data.size(); i < size; ++i)
+        EXPECT_EQ(m_model_data[i], result[i]);
+}
+
 #ifdef BA_TIFF_SUPPORT
 
 TEST_F(RW2DTest, rwTiff)