Add QCBOREncode_AddBytesLenOnly(), special for COSE sig verification
diff --git a/test/qcbor_encode_tests.c b/test/qcbor_encode_tests.c
index ad17feb..f08927c 100644
--- a/test/qcbor_encode_tests.c
+++ b/test/qcbor_encode_tests.c
@@ -1380,6 +1380,12 @@
 static const uint8_t spExpectedBstrWrap[] = {0x82, 0x19, 0x01, 0xC3, 0x43, 0x19, 0x01, 0xD2};
 
 /*
+ 81   #array(1)
+ 0x58  0x25  # string of length 37 (length of "This is longer than twenty four bytes")
+ */
+static const uint8_t spExpectedTypeAndLen[] = {0x81, 0x58, 0x25};
+
+/*
  Very basic bstr wrapping test
  */
 int BstrWrapTest()
@@ -1424,6 +1430,20 @@
    if(BStr.ptr != NULL || BStr.len != 3) {
       return -5;
    }
+   
+   // Third, test QCBOREncode_AddBytesLenOnly() here as it is part of the
+   // bstr wrapping use cases.
+   UsefulBuf_MAKE_STACK_UB(StuffBuf, 50);
+   QCBOREncode_Init(&EC, StuffBuf);
+   QCBOREncode_OpenArray(&EC);
+   QCBOREncode_AddBytesLenOnly(&EC, UsefulBuf_FROM_SZ_LITERAL("This is longer than twenty four bytes"));
+   QCBOREncode_CloseArray(&EC);
+   if(QCBOREncode_Finish(&EC, &Encoded)) {
+      return -6;
+   }
+   if(CheckResults(Encoded, spExpectedTypeAndLen)) {
+      return -7;
+   }
 
    return 0;
 }