+ unit test to cover file io ascii

Tests/Unit/Device/RW2DTest.cpp

@@ -56,6 +56,17 @@ TEST_F(RW2DTest, rwNumpyMatrix)
         EXPECT_EQ(m_model_data[i], result[i]);
 }
 
+TEST_F(RW2DTest, ascii)
+{
+    const std::string path = testdir / fs::path("rw2dtestdata");
+    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]);
+}
+
 TEST_F(RW2DTest, gz)
 {
     const std::string path = testdir / fs::path("rw2dtestdata.gz");