3 files changed, 62 insertions, 2 deletions
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 234b0cf9d2..41549842cb 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -107,3 +107,12 @@ add_executable(format_test format_test.cpp)
 target_link_libraries(format_test ${NBT_NAME})
 add_test(format_test format_test)
 stop_warnings(format_test)
+
+# Optional local test executable to verify value assignments (developer helper)
+option(NBT_BUILD_LOCAL_TEST "Build a small local test executable for value assignments" ON)
+if(NBT_BUILD_LOCAL_TEST)
+    add_executable(test_value test_value.cpp)
+    target_link_libraries(test_value ${NBT_NAME})
+    add_test(test_value test_value)
+    stop_warnings(test_value)
+endif()
diff --git a/test/format_test.cpp b/test/format_test.cpp
index 559af11299..1a689ed3f2 100644
--- a/test/format_test.cpp
+++ b/test/format_test.cpp
@@ -22,7 +22,8 @@
  * along with libnbt++.  If not, see <http://www.gnu.org/licenses/>.
  */
 //#include "text/json_formatter.h"
-//#include "io/stream_reader.h"
+#include "io/stream_reader.h"
+#include "io/stream_writer.h"
 #include <fstream>
 #include <iostream>
 #include <limits>
@@ -32,7 +33,7 @@ using namespace nbt;
 
 int main()
 {
-    //TODO: Write that into a file
+    // Write that into a file and read back for testing
     tag_compound comp{
         {"byte", tag_byte(-128)},
         {"short", tag_short(-32768)},
@@ -83,4 +84,20 @@ int main()
     std::cout << "----- default operator<<:\n";
     std::cout << comp;
     std::cout << "\n-----" << std::endl;
+
+    // Write to file and read back
+    {
+        std::ofstream out("test_output.nbt", std::ios::binary);
+        nbt::io::write_compound(out, comp);
+    }
+
+    {
+        std::ifstream in("test_output.nbt", std::ios::binary);
+        auto [read_comp, name] = nbt::io::read_compound(in);
+        std::cout << "----- read back from file:\n";
+        std::cout << read_comp;
+        std::cout << "\n-----" << std::endl;
+    }
+
+    return 0;
 }
diff --git a/test/test_value.cpp b/test/test_value.cpp
new file mode 100644
index 0000000000..009cefe8ef
--- /dev/null
+++ b/test/test_value.cpp
@@ -0,0 +1,34 @@
+#include <iostream>
+#include "nbt_tags.h"
+#include "value.h"
+
+using namespace nbt;
+
+int main()
+{
+    try {
+        value v;
+
+        v = int8_t(-5);
+        std::cout << "assigned int8_t(-5): as int32=" << int32_t(v) << ", as double=" << double(v) << "\n";
+
+        v = int16_t(12345);
+        std::cout << "assigned int16_t(12345): as int32=" << int32_t(v) << ", as double=" << double(v) << "\n";
+
+        v = int32_t(100000);
+        std::cout << "assigned int32_t(100000): as int64=" << int64_t(v) << ", as double=" << double(v) << "\n";
+
+        v = float(3.14f);
+        std::cout << "assigned float(3.14): as double=" << double(v) << "\n";
+
+        v = double(2.718281828);
+        std::cout << "assigned double(2.71828): as double=" << double(v) << "\n";
+
+        std::cout << "Test finished OK\n";
+    }
+    catch(const std::exception& e) {
+        std::cerr << "Exception: " << e.what() << "\n";
+        return 1;
+    }
+    return 0;
+}