1 files changed, 32 insertions, 0 deletions
diff --git a/libs/nanopb/tests/regression/issue_247/padding.c b/libs/nanopb/tests/regression/issue_247/padding.c
new file mode 100644
index 00000000..8860179d
--- /dev/null
+++ b/libs/nanopb/tests/regression/issue_247/padding.c
@@ -0,0 +1,32 @@
+#include <pb_encode.h>
+#include <unittests.h>
+#include <string.h>
+#include "padding.pb.h"
+
+int main()
+{
+    int status = 0;
+    
+    TestMessage msg;
+    
+    /* Set padding bytes to garbage */
+    memset(&msg, 0xAA, sizeof(msg));
+    
+    /* Set all meaningful fields to 0 */
+    msg.submsg.boolfield = false;
+    msg.submsg.intfield = 0;
+    
+    /* Test encoding */
+    {
+        pb_byte_t buf[128] = {0};
+        pb_ostream_t stream = pb_ostream_from_buffer(buf, sizeof(buf));
+        TEST(pb_encode(&stream, TestMessage_fields, &msg));
+        
+        /* Because all fields have zero values, proto3 encoder
+         * shouldn't write out anything. */
+        TEST(stream.bytes_written == 0);
+    }
+    
+    return status;
+}
+