Renamed method, and added first test to cli

GCryptCLI/test/DataFormatter.cpp

@@ -1,9 +1,31 @@
-#include "ModuleDataFormatter.h"
+#include <ModuleDataFormatter.h>
+#include <GCrypt/Key.h>
 #include "Catch2.h"
 
 using namespace Leonetienne::GCrypt;
 
-// Empty test
-TEST_CASE(__FILE__"", "[ModuleDataFormatter]") {
+// Tests that recoding byte iobase works
+TEST_CASE(__FILE__"RecodingSingleBlock-bytes", "[ModuleDataFormatter]") {
+
+  // Setup
+  Block b_initial;
+  b_initial = Key::Random();
+
+  // Exercise
+  // Convert to bytes
+  const std::string b_format = ModuleDataFormatter::FormatBlock(
+    b_initial,
+    Configuration::IOBASE_FORMAT::BASE_BYTES
+  );
+
+  // Convert back to a block
+  const Block b_retrieved = ModuleDataFormatter::DecodeFormat(
+    b_format,
+    Configuration::IOBASE_FORMAT::BASE_BYTES
+  );
+
+  // Verify
+  // Do b_initial and b_retrieved match?
+  REQUIRE(b_initial == b_retrieved);
 }